Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Texas Instruments LM3533TME-40/NOPB

Name: LM3533TME-40/NOPB
Brand: Texas Instruments
SKU: LM3533TME-40/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: LM3533TME-40/NOPB

Manufacturer:: Texas Instruments

Category:: LED Drivers

Package:: 20-WFBGA, DSBGA

Datasheet:: LM3533TME-40/NOPB.pdf

Description:: IC LED DRV RGLTR PWM 20DSBGA

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:650

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

LM3533TME-40/NOPB from Texas Instruments is a fully integrated LED power management IC for smartphone backlight and indicator lighting. It drives two parallel high-voltage LED strings up to 40 V (HVLED1/HVLED2), five low-voltage current sinks (LVLED1–LVLED5) up to 30 mA each, and integrates a 2× charge pump and 500-kHz/1-MHz programmable boost converter. It supports I²C configuration, ambient light sensing (ALS), PWM-based CABC, and on-chip pattern generation for RGB indicators.

For engineers reviewing the LM3533TME-40/NOPB datasheet, LM3533TME-40/NOPB pinout, LM3533TME-40/NOPB application, or LM3533TME-40/NOPB equivalent, this device delivers precise exponential dimming (14-bit equivalent), ±2% HVLED current matching, programmable overvoltage protection (16/24/32/40 V), thermal shutdown at 140°C, and DSBGA-20 package compatibility for space-constrained mobile designs.

Technical Context

The LM3533TME-40/NOPB implements dual-path LED power delivery: a synchronous boost converter with adaptive 400-mV current-sink headroom regulation powers HVLED1 and HVLED2, while a 2× charge pump supplies bias for five independently controllable LVLED current sinks. Its I²C interface configures control banks (A/B for HVLEDs; C–F for LVLEDs), enabling grouped or individual current programming and pattern sequencing.

It embeds an 8-bit ALS ADC with internal low-pass filtering and five user-defined brightness zones, allowing closed-loop ambient-adaptive backlight adjustment. The PWM input supports content-aware brightness control, and hardware enable (HWEN) provides system-level shutdown with full register reset - all operating across 2.7 V to 5.5 V input and −40°C to +85°C ambient range.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7 V to 5.5 V - supports single-cell Li-ion and USB-powered mobile systems without external LDO.
Max Output Voltage	40 V - enables driving long series strings of white LEDs (e.g., 10–12 WLEDs @ 3.3 V each) in display backlight applications.
HVLED Current Accuracy	±2% matching between HVLED1 and HVLED2 - ensures uniform brightness across dual-display or dual-zone backlight panels.
LVLED Full-Scale Current	30 mA per sink (LVLED1–LVLED5) - sufficient for high-brightness status indicators, keypad LEDs, and RGB notification lights.
Dimming Resolution	14-bit equivalent exponential mapping via 8-bit register - delivers perceptually linear brightness control across 0.1% to 100% intensity range.
OVP Thresholds	16 V / 24 V / 32 V / 40 V - selectable via register to match LED string forward voltage and prevent overvoltage stress during fault conditions.
Switching Frequency	500 kHz or 1 MHz - allows optimization of inductor size (4.7 µH to 22 µH) and efficiency (up to 90%) in compact PCB layouts.

Pinout & Package

LM3533TME-40/NOPB is housed in a 2.04 mm × 1.78 mm, 20-pin DSBGA (YFQ) package optimized for ultra-thin smartphone PCBs. Thermal resistance R_θJA = 55.3°C/W under JEDEC 4-layer board conditions.

Pin/Terminal	Circuit Role	Design Meaning
A1 C−	Charge pump flying capacitor negative	Connects to 1-µF ceramic capacitor (C−–C+) - critical for stable 2× charge pump operation powering LVLED sinks.
A2 C+	Charge pump flying capacitor positive	Completes flying capacitor path - mismatched C+ / C− layout causes ripple and efficiency loss in LVLED bias rail.
A3 CPOUT	Charge pump output	Bypassed to GND with 1-µF ceramic - supplies regulated ~4.4 V bias for LVLED current sinks; decoupling prevents current sink noise coupling.
A4 IN	Main input supply	Bypassed with ≥2.2-µF ceramic - low-ESR input cap essential for stable boost converter operation and transient response.
B1 SCL	I²C clock input	High-impedance CMOS input - requires pull-up; timing compliant with standard-mode (100 kHz) and fast-mode (400 kHz) I²C.
B2 SDA	I²C data I/O	Open-drain I/O with 3 mA sink capability - supports multi-master I²C bus sharing with other PMICs or sensors.
B3 OVP	Boost output overvoltage sense	Monitors COUT node - triggers shutdown if voltage exceeds programmed threshold (16/24/32/40 V), protecting LEDs and FET.
B4 GND	Power ground	Primary return path for boost switch, charge pump, and all current sinks - must be low-inductance connection to minimize noise.
C1 HVLED1	HV LED string 1 anode connection	Sinks up to 30 mA; regulated headroom = 400 mV - enables dynamic string voltage compensation when HVLED1 ≠ HVLED2.
C2 INT	ALS interrupt output	Open-drain, active-low signal - asserts when ALS zone crossing occurs; enables host processor wake-up without polling.
C3 PWM	CABC brightness control input	High-impedance logic input - duty cycle directly scales programmed LED current; no external RC filter required due to internal LPF.
C4 SW	Boost switch node	Connects to inductor and Schottky diode anode - high dv/dt node; requires tight loop layout to minimize EMI and switching losses.
D1 HVLED2	HV LED string 2 anode connection	Functionally identical to HVLED1 - dual-sink architecture supports independent or matched control via Control Bank A/B assignment.
D2 ALS	Ambient light sensor analog input	Accepts analog or PWM ALS signals; internal 8-bit ADC and 128-step gain selection enable wide dynamic range (3 mV–2.1 V).
D3 HWEN	Hardware enable	Active-high global enable - pulling low forces full shutdown (I_SHDN ≤ 5 µA) and resets all registers to default state.
D4 LVLED5	Low-voltage LED sink 5	Programmable 0–30 mA sink - assigned to Control Banks C–F; supports blinking patterns, ramping, and ALS/PWM modulation.
E1 LVLED1	Low-voltage LED sink 1	First of five identical LVLED sinks - used for status indicators, key backlight, or RGB color channel with synchronized pattern engine.
E2 LVLED2	Low-voltage LED sink 2	Independent sink with dedicated pattern generator - enables dual-color blink sequences (e.g., charging vs notification).
E3 LVLED3	Low-voltage LED sink 3	Supports ALS-mapped brightness zones - e.g., dimmed in dark environments, brightened in daylight for visibility.
E4 LVLED4	Low-voltage LED sink 4	Configurable via I²C register map - can be grouped with LVLED1–LVLED5 for unified control or isolated for unique behavior.

Key Features

Feature	Design Value
Integrated 2× charge pump	Eliminates need for external DC/DC converter to bias LVLEDs - reduces BOM count and PCB area by >27 mm² total solution size.
Programmable OVP thresholds	Four selectable levels (16/24/32/40 V) prevent LED overvoltage during open-circuit or thermal derating - no external resistor divider needed.
On-chip pattern generation engine	Four independent generators drive LVLED1–LVLED5 with programmable rise/fall times, delays, and high/low current states - enables rich UI feedback without MCU intervention.
ALS with 5-zone brightness mapping	Digitizes ambient light and maps to discrete current targets per control bank - delivers automatic, flicker-free backlight adaptation across lighting conditions.
Exponential dimming curve	14-bit effective resolution via 8-bit register code - matches human eye luminance perception, avoiding visible steps in low-brightness regions.
Thermal shutdown with hysteresis	Shuts down at 140°C (typ), resumes at 125°C (typ) - protects silicon and LEDs during sustained high-current operation in sealed enclosures.

Applications

Smartphone Display Backlight	Keypad & Status Indicator Lighting
Use Scenario: Driving dual parallel WLED strings (e.g., 8–10 LEDs each) for LCD or OLED display illumination in compact handsets. IC Role / Device Role / Timing Role: High-voltage LED driver with adaptive boost regulation and exponential dimming control via I²C or PWM/CABC. Use Value: Delivers uniform brightness across both strings (±2% matching) and supports smooth 0.1%–100% dimming without visible stepping.	Use Scenario: Powering five discrete indicator LEDs (e.g., battery, signal strength, charging, Bluetooth, notification) with independent blink patterns. IC Role / Device Role / Timing Role: Low-voltage current sink controller with embedded pattern generator and ALS-driven auto-brightness. Use Value: Enables rich visual UI (e.g., breathing, pulse, chase effects) using only one IC - eliminates need for discrete timers or GPIO expansion.
RGB Notification Driver	Content-Aware Brightness Control (CABC)
Use Scenario: Driving red/green/blue indicator LEDs with synchronized color transitions and intensity modulation based on ambient light. IC Role / Device Role / Timing Role: Multi-sink current controller with per-sink programmable current, dimming curve, and ALS-mapped brightness zones. Use Value: Achieves accurate color balance and consistent perceived brightness across lighting environments - critical for brand-identifiable UI cues.	Use Scenario: Dynamically adjusting display backlight intensity based on video content luminance (e.g., dark scenes vs bright scenes) to reduce power. IC Role / Device Role / Timing Role: PWM-input modulator that scales HVLED current proportionally to incoming duty cycle - no firmware overhead required. Use Value: Reduces average display power by up to 30% during video playback while maintaining perceptual brightness - extends battery life.

Smartphone Display Backlight

Keypad & Status Indicator Lighting

Use Scenario: Driving dual parallel WLED strings (e.g., 8–10 LEDs each) for LCD or OLED display illumination in compact handsets.

IC Role / Device Role / Timing Role: High-voltage LED driver with adaptive boost regulation and exponential dimming control via I²C or PWM/CABC.

Use Value: Delivers uniform brightness across both strings (±2% matching) and supports smooth 0.1%–100% dimming without visible stepping.

Use Scenario: Powering five discrete indicator LEDs (e.g., battery, signal strength, charging, Bluetooth, notification) with independent blink patterns.

IC Role / Device Role / Timing Role: Low-voltage current sink controller with embedded pattern generator and ALS-driven auto-brightness.

Use Value: Enables rich visual UI (e.g., breathing, pulse, chase effects) using only one IC - eliminates need for discrete timers or GPIO expansion.

RGB Notification Driver

Content-Aware Brightness Control (CABC)

Use Scenario: Driving red/green/blue indicator LEDs with synchronized color transitions and intensity modulation based on ambient light.

IC Role / Device Role / Timing Role: Multi-sink current controller with per-sink programmable current, dimming curve, and ALS-mapped brightness zones.

Use Value: Achieves accurate color balance and consistent perceived brightness across lighting environments - critical for brand-identifiable UI cues.

Use Scenario: Dynamically adjusting display backlight intensity based on video content luminance (e.g., dark scenes vs bright scenes) to reduce power.

IC Role / Device Role / Timing Role: PWM-input modulator that scales HVLED current proportionally to incoming duty cycle - no firmware overhead required.

Use Value: Reduces average display power by up to 30% during video playback while maintaining perceptual brightness - extends battery life.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM3532TME/NOPB	Lacks HVLED2 output and second boost path; supports only one 40-V string and five LVLEDs - no dual-string backlight capability.	Suitable for single-zone displays or simpler indicator-only designs; not viable for dual-panel or dual-zone smartphones.	Select LM3532TME/NOPB only when dual HVLED string control is unnecessary and BOM cost reduction is prioritized.
TPS61165RTJR	Single-output 40-V boost LED driver with analog/PWM dimming; no charge pump, no LVLED sinks, no ALS interface, no I²C.	Requires external circuitry for multi-LED control, indicator blinking, or ambient adaptation - increases design complexity and footprint.	Choose TPS61165RTJR for cost-sensitive, fixed-function backlight-only applications where intelligence and integration are secondary.

Compared with LM3532TME/NOPB and TPS61165RTJR, the LM3533TME-40/NOPB uniquely integrates dual HVLED strings, five LVLED sinks, ALS processing, pattern generation, and I²C configurability in one DSBGA-20 package - making it the only single-chip solution for full smartphone illumination subsystems.

Availability

LM3533TME-40/NOPB is available at Aetrix Electronics and suitable for smartphone display backlighting, keypad illumination, RGB indicator control, and content-aware brightness management requiring stable component supply across high-volume production cycles.

Supply support for LM3533TME-40/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies for industrial, automotive, and consumer electronics.

The LM3533TME-40/NOPB belongs to TI's mobile lighting power management product line, engineered specifically to consolidate backlight, keypad, and indicator LED functions into a single chip for next-generation smartphones and handheld devices.

FAQ

What is the maximum LED string voltage supported by LM3533TME-40/NOPB?

The LM3533TME-40/NOPB supports up to 40 V on its HVLED1 and HVLED2 outputs, as confirmed by absolute maximum ratings (45 V) and recommended operating conditions (40 V). This enables driving typical white LED strings of 10–12 devices (3.3 V VF each) in series, and the device includes four programmable overvoltage protection thresholds - 16 V, 24 V, 32 V, and 40 V - to safeguard against transient overvoltage events.

Does LM3533TME-40/NOPB support ambient light sensing without external components?

Yes, LM3533TME-40/NOPB integrates a complete ALS interface with an internal 8-bit ADC, programmable gain (128 resistor steps), and built-in low-pass filtering. It accepts direct connection to analog-output or PWM-output ambient light sensors - no external op-amps, resistors, or filters are required. The ALS input (pin D2) operates from 3 mV to 2.1 V and maps ambient readings to five user-configurable brightness zones for automatic LED current adjustment.

How many independent LED current sinks does LM3533TME-40/NOPB provide?

The LM3533TME-40/NOPB provides seven total current sinks: two high-voltage (HVLED1 and HVLED2) rated up to 40 V / 30 mA each, and five low-voltage (LVLED1 through LVLED5) rated up to 6 V / 30 mA each. All seven sinks are independently programmable for current level, dimming curve (linear/exponential), and modulation source (I²C, ALS, or PWM), and can be grouped into control banks for synchronized behavior.

Can LM3533TME-40/NOPB generate blinking patterns without MCU involvement?

Yes, LM3533TME-40/NOPB includes four fully programmable on-chip pattern generators that operate autonomously. Each generator controls one or more LVLED sinks (LVLED1–LVLED5) with independent settings for rise time, fall time, on/off delay, high/low current level, and pattern duration. Once configured via I²C, the pattern engine runs without CPU intervention - ideal for low-power status indicators and UI feedback.

What package type and dimensions does LM3533TME-40/NOPB use?

LM3533TME-40/NOPB uses a 20-pin DSBGA (Die Size Ball Grid Array) package designated YFQ, with body dimensions of 2.04 mm × 1.78 mm and a maximum height of 0.57 mm. This ultra-compact, bottom-terminal package is optimized for thin smartphone PCBs and features a thermal resistance of 55.3°C/W (Junction-to-Ambient) under JEDEC-standard 4-layer board conditions.

LM3533TME-40/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 20-WFBGA, DSBGA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Up (Boost), Switched Capacitor (Charge Pump)

Internal Switch(s):: Yes

Number of Outputs:: 7

Voltage - Supply (Min):: 2.7V

Voltage - Supply (Max):: 5.5V

Voltage - Output:: 40V

Current - Output / Channel:: 30mA

Frequency:: 500kHz, 1MHz

Dimming:: PWM

Applications:: Backlight

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-DSBGA

LM3533TME-40/NOPB FAQ

1.How can I place an order for LM3533TME-40/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM3533TME-40/NOPB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM3533TME-40/NOPB reliable?

The price and inventory of LM3533TME-40/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3533TME-40/NOPB is usually 5 days.

3.What payment methods are accepted for LM3533TME-40/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3533TME-40/NOPB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM3533TME-40/NOPB?

LM3533TME-40/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM3533TME-40/NOPB order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM3533TME-40/NOPB?

For technical support, including LM3533TME-40/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3533TME-40/NOPB requirements.

6.How does Aetrix verify that LM3533TME-40/NOPB is sourced from the original manufacturer or authorized distributors?

All LM3533TME-40/NOPB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM3533TME-40/NOPB meets industry standards.

7.What is the process for return or replacement of LM3533TME-40/NOPB?

All LM3533TME-40/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3533TME-40/NOPB, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM3533TME-40/NOPB part is unused and in its original packaging.

Return procedure for LM3533TME-40/NOPB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…