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Texas Instruments LP5036RJVR
- Part No.:
- LP5036RJVR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 46-VFQFN Exposed Pad
- Datasheet:
-
LP5036RJVR.pdf
- Description:
- IC LED DRIVER LINEAR 35MA 46VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,091
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Product details
Overview
LP5036RJVR from Texas Instruments is a 36-channel, 12-bit PWM constant-current RGB LED driver IC with integrated 29-kHz PWM generators per channel, I²C interface, and ultra-low quiescent current (12 µA in power-save mode). It delivers precise per-channel current sinking up to 35 mA at VCC ≥3.3 V, ±5% device-to-device and channel-to-channel current matching, and supports hardware address selection for up to four devices on one bus. It is used in smart speaker status lighting and video doorbell indicator systems.
For engineers reviewing the LP5036RJVR datasheet, LP5036RJVR pinout, LP5036RJVR application, or LP5036RJVR equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed RGB LED HMI use cases, and two rigorously cross-checked alternative parts - all grounded in TI's production-grade SLVSEH1B datasheet.
Technical Context
The LP5036RJVR implements independent 8-bit color-mixing and 8-bit intensity-control registers per RGB LED module, enabling >16 million color combinations without distortion. Its 12-bit effective PWM resolution combines 9-bit base PWM with 3-bit dithering (configurable), operating at a fixed 29-kHz switching frequency to eliminate audible noise.
It features three-phase PWM phase-shifting across its 36 outputs (12 LEDs × R/G/B), reducing peak input current and ceramic capacitor ringing. Power management includes automatic power-save mode activation after 30 ms of all-LED-off state, dropping total supply current to ≤12 µA - critical for battery-powered smart home endpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 5.5 V - supports direct connection to common MCU rails (1.8/3.3/5 V logic compatible on EN/SDA/SCL) |
| Max Sink Current | 35 mA per channel at VCC ≥3.3 V - enables driving high-brightness RGB LEDs without external boost |
| PWM Resolution | 12-bit effective (9-bit + 3-bit dithering) - achieves smooth 4096-step dimming with no visible stepping in breathing/fade effects |
| PWM Frequency | 29 kHz - operates above human hearing range (20 kHz), eliminating coil whine and capacitor squeal |
| I²C Speed | Up to 400 kHz Fast Mode - allows rapid configuration of all 36 channels within <1.5 ms per full register write |
| Current Matching | ±5% device-to-device and channel-to-channel error - ensures uniform color and brightness across multi-device LED arrays |
| Quiescent Current | 12 µA max in power-save mode - extends battery life in smoke detectors and smart locks with intermittent LED activity |
Pinout & Package
LP5036RJVR is housed in a 46-pin VQFN package (6.00 mm × 5.00 mm) with exposed thermal pad connected to GND. The package supports high-density PCB layouts and efficient heat dissipation for sustained 35-mA-per-channel operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT35 | Constant-current sink outputs | 36 individually controllable LED cathode drivers; each supports up to 35 mA sink current with <0.4 V saturation voltage |
| EN | Chip enable input | Active-high digital enable; drives device into shutdown (<1 µA) when low, enabling system-level power gating |
| SDA / SCL | I²C bidirectional data / clock | Supports 400-kHz Fast Mode; pins tolerate 1.8-V/3.3-V/5-V logic levels - simplifies interfacing with diverse MCUs |
| ADDR0 / ADDR1 | Hardware I²C address select | Two binary inputs set slave address; allow up to four LP5036RJVR devices on same bus without software reconfiguration |
| IREF | Global current reference node | Connects external resistor to set all 36 channel currents simultaneously; 0.7 V reference enables precise, temperature-stable current programming |
| VCAP | LDO output filter node | Requires 1-µF ceramic capacitor to GND; stabilizes internal 1.8-V LDO powering digital core and PWM logic |
| VCC / GND (×2) | Main power and ground | Dual GND pins (pins 37 & 46) plus thermal pad reduce impedance; VCC powers analog/digital sections and LED sinks |
Key Features
| Feature | Design Value |
|---|---|
| Independent RGB bank control | Three programmable R/G/B register banks simplify firmware for synchronized blinking, breathing, or chasing effects - cuts MCU register writes by 67% vs per-channel updates |
| Logarithmic or linear brightness scaling | Configurable via Log_Scale_EN bit; logarithmic mode matches human eye response for natural dimming, while linear mode enables precise gamma correction |
| Auto-increment I²C addressing | Enables writing consecutive registers (e.g., all 36 OUTx_COLOR values) in a single I²C transaction - reduces bus overhead and latency |
| Broadcast slave address | Allows simultaneous configuration of multiple LP5036RJVR devices (e.g., global brightness update) - eliminates staggered timing skew in multi-zone lighting |
| Thermal shutdown protection | Triggers at 160°C junction temperature with 15°C hysteresis - prevents damage during sustained high-current operation in enclosed smart home enclosures |
Applications
| Smart Speaker Status Lighting | Video Doorbell Indicator |
|---|---|
Use Scenario: Real-time visual feedback for voice assistant wake state, volume level, and connection status using multi-color ring lighting. IC Role / Device Role / Timing Role: LP5036RJVR acts as the primary RGB LED controller, receiving I²C commands from the host MCU to drive 12× RGB LEDs with synchronized fade/breathe effects. Use Value: 29-kHz PWM eliminates audible noise during continuous animation; 12-bit resolution ensures smooth transitions between 4096 brightness steps without banding. |
Use Scenario: Illuminated doorbell button and status ring indicating call active, motion detection, or low-battery warning. IC Role / Device Role / Timing Role: LP5036RJVR serves as the low-power LED driver managing 6–9 RGB LEDs, activated only during event-triggered alerts to conserve energy. Use Value: 12 µA power-save mode extends battery life in wireless doorbells; ±5% current matching guarantees consistent color across all indicators. |
| Smart Lock Entry Feedback | Smoke Detector Alert Ring |
Use Scenario: Color-coded LED ring showing lock/unlock status, battery level, and tamper alerts on residential smart locks. IC Role / Device Role / Timing Role: LP5036RJVR executes pre-programmed color sequences (e.g., green pulse for unlock, red flash for low battery) under MCU supervision. Use Value: Hardware address pins (ADDR0/ADDR1) allow co-location with other TI LED drivers on same I²C bus - minimizing MCU GPIO count and BOM cost. |
Use Scenario: High-visibility 360° alert ring that pulses red during smoke detection and amber during low-battery warning. IC Role / Device Role / Timing Role: LP5036RJVR drives 12+ discrete red/amber LEDs in parallel, delivering >25 mA per channel to meet UL 217 visibility requirements. Use Value: 35 mA per-channel capability at 3.3 V enables direct drive of high-luminance LEDs without external transistors - reducing component count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RGB LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59731RTET | 12-channel, 16-bit PWM, SPI interface, no hardware address pins | Lower channel count; requires more ICs for 36-output systems; lacks auto-increment and broadcast addressing | Choose when SPI interface is preferred and channel density is lower; not drop-in for LP5036RJVR's 36-channel I²C architecture |
| IS31FL3733-QFLS4 | 28-channel, 12-bit PWM, I²C, integrated dot correction, no phase-shifting | Missing 3-phase PWM shifting - higher peak input current; different register map and initialization sequence | Consider for applications needing per-LED dot correction but accepting trade-offs in EMI and power supply ripple performance |
Compared with TLC59731RTET and IS31FL3733-QFLS4, the LP5036RJVR uniquely delivers 36-channel I²C control with hardware addressability, 3-phase PWM shifting for reduced input ripple, and true 12-bit dithered PWM - making it optimal for space-constrained, low-noise, battery-aware smart home HMI designs.
Availability
LP5036RJVR is available at Aetrix Electronics and suitable for smart speaker interfaces, video doorbell indicators, and electric smart lock status lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LP5036RJVR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and interface solutions.
The LP5036RJVR belongs to TI's LP50xx family of ultra-low-quiescent-current RGB LED drivers, designed specifically for human-machine interface lighting in battery-powered and acoustically sensitive consumer IoT devices.
FAQ
What is the maximum output current per channel for LP5036RJVR?
The LP5036RJVR supports up to 35 mA per channel when VCC is ≥3.3 V and Max_Current_Option = 1 (bit). At full VCC range (2.7–5.5 V), the maximum is 25.5 mA per channel. This is set globally via the external IREF resistor and applies uniformly across all 36 OUT0–OUT35 pins. The LP5036RJVR datasheet specifies ±5% channel-to-channel current matching under these conditions.
Does LP5036RJVR support logarithmic brightness control?
Yes, the LP5036RJVR supports both logarithmic and linear brightness scaling via the Log_Scale_EN register bit. When enabled, logarithmic scaling maps the 8-bit LEDx_BRIGHTNESS register to a perceptually uniform dimming curve - critical for natural-looking fade-in/fade-out effects in smart speaker lighting. The LP5036RJVR implements this without color distortion because intensity and color mixing are handled in separate registers.
How many LP5036RJVR devices can share the same I²C bus?
Up to four LP5036RJVR devices can operate on a single I²C bus using the ADDR0 and ADDR1 hardware pins, which configure unique 7-bit slave addresses. Each combination of ADDR0/ADDR1 (00, 01, 10, 11) yields a distinct address, eliminating software address conflicts. The LP5036RJVR also supports broadcast addressing for simultaneous register updates across all connected devices.
What is the purpose of the VCAP pin on LP5036RJVR?
VCAP is the output pin of an internal 1.8-V LDO regulator that powers the LP5036RJVR's digital core and PWM logic. It must be decoupled to GND with a 1-µF ceramic capacitor to ensure stable operation and low-noise PWM generation. Failure to connect this capacitor causes erratic behavior, including I²C communication failure and inconsistent PWM output - a requirement explicitly stated in the LP5036RJVR datasheet Section 6.
Is LP5036RJVR suitable for battery-powered applications?
Yes, the LP5036RJVR is optimized for battery-powered use: it draws ≤12 µA in power-save mode (activated automatically after 30 ms of all-LED-off state) and ≤1 µA in shutdown mode (EN = low). Its 29-kHz PWM eliminates audible noise from ceramic capacitors, and its wide 2.7–5.5 V VCC range accommodates declining battery voltages - making the LP5036RJVR ideal for smart locks, smoke detectors, and portable IoT endpoints.
LP5036RJVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 46-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 36
- Voltage - Supply (Min):
- 2.7V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 0V ~ 5.5V
- Current - Output / Channel:
- 35mA
- Frequency:
- 29kHz
- Dimming:
- -
- Applications:
- LED Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 46-VQFN (6x5)
LP5036RJVR FAQ
1.How can I place an order for LP5036RJVR through Aetrix?
Please submit a Request for Quotation (RFQ) for LP5036RJVR 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 LP5036RJVR reliable?
The price and inventory of LP5036RJVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP5036RJVR is usually 5 days.
3.What payment methods are accepted for LP5036RJVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP5036RJVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP5036RJVR?
LP5036RJVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP5036RJVR 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 LP5036RJVR?
For technical support, including LP5036RJVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP5036RJVR requirements.
6.How does Aetrix verify that LP5036RJVR is sourced from the original manufacturer or authorized distributors?
All LP5036RJVR 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 LP5036RJVR meets industry standards.
7.What is the process for return or replacement of LP5036RJVR?
All LP5036RJVR units undergo pre-shipment inspection (PSI). If there is an issue with LP5036RJVR, 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 LP5036RJVR part is unused and in its original packaging.
Return procedure for LP5036RJVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP5036RJVR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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