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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

Texas Instruments LM3262TMX/NOPB

Name: LM3262TMX/NOPB
Brand: Texas Instruments
SKU: LM3262TMX/NOPB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM3262TMX/NOPB

Manufacturer:: Texas Instruments

Category:: Special Purpose Regulators

Package:: 9-WFBGA, DSBGA

Datasheet:: LM3262TMX/NOPB.pdf

Description:: IC REG CONV RF PWR 1OUT 9DSBGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LM3262TMX/NOPB from Texas Instruments is a 6-MHz, 800-mA synchronous step-down DC-DC converter optimized for RF power amplifier supply in single-cell Li-ion systems (2.5 V to 5.5 V input), delivering dynamically adjustable output (0.4 V to 3.6 V) via analog VCON control with 2.5× gain, and featuring auto-bypass mode for <50 mV dropout at high load - deployed in LTE/HSUPA handsets and battery-powered RF transceivers.

For engineers reviewing the LM3262TMX/NOPB datasheet, LM3262TMX/NOPB pinout, LM3262TMX/NOPB application, or LM3262TMX/NOPB equivalent, this page delivers verified functional modes (PWM/ECO/Bypass/Sleep/Shutdown), confirmed DSBGA-9 package mapping, validated 9-pin terminal roles, real-world efficiency data (93% @ 3.8 V_IN/3.4 V_OUT/500 mA), and precise VCON-to-V_OUT linearity (±50 mV or ±3%) - all critical for PA bias optimization and battery-life-sensitive designs.

Technical Context

The LM3262TMX/NOPB implements voltage-mode PWM control with input-voltage feed-forward for stable regulation across 2.5–5.5 V input, and integrates synchronous rectification using internal PFET/NFET switches. Its five operational modes-PWM (6 MHz fixed frequency), ECO (reduced switching frequency at light load), bypass (low-dropout direct battery path), sleep (<25 µA quiescent), and shutdown (0.1 µA)-are managed by VCON voltage thresholds and BPEN logic.

Output voltage is set by VCON (0.16 V–1.44 V range) with 2.5× gain, enabling dynamic PA supply scaling without external resistors. Auto-bypass activation occurs when VIN − (2.5 × VCON) falls below 200 mV (typ.) for >10 µs, while thermal shutdown engages at 150°C (typ.) and disables both FETs until junction cools to 130°C (typ.).

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5 V to 5.5 V - supports full discharge curve of single Li-ion cell without brownout risk.
Output Voltage Range	0.4 V to 3.6 V - programmable via analog VCON pin (2.5× gain), eliminating feedback resistor network.
Switching Frequency	6 MHz (typ.) - enables use of tiny 0.5 µH chip inductor (0805/2012 case) and minimal ceramic capacitors.
Max Load Current	800 mA in PWM mode; up to 1000 mA in bypass mode - supports peak PA transmit bursts without voltage sag.
Quiescent Current	25 µA (typ.) in sleep mode; 0.1 µA (typ.) in shutdown - extends standby time in always-on RF devices.
Efficiency	93% (typ.) at 3.8 V_IN, 3.4 V_OUT, 500 mA - achieved via synchronous rectification and low-R_DS(on) internal FETs.
Bypass Dropout	<50 mV (typ.) - ensures near-battery V_OUT during high-power transmission, maximizing PA efficiency.

Pinout & Package

LM3262TMX/NOPB uses a 9-pin, lead-free DSBGA (YFQ) package measuring 1.51 mm × 1.385 mm with 0.4-mm bump pitch - designed for ultra-compact RF front-end layouts in mobile handsets.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Power Input	Primary SMPS input rail (2.5–5.5 V); connects to Li-ion battery or system PMIC output.
SW	Switch Node	Internal PFET drain / NFET source node; connects to inductor; requires low-inductance layout for EMI control.
PGND	Power Ground	Return path for high-current switching loop (PFET/NFET); must be separated from SGND to minimize noise coupling.
SGND	Signal Ground	Analog reference for VCON, FB, EN, BPEN; ties to system AGND and must avoid switching current paths.
VCON	Analog Control Input	Sets V_OUT = 2.5 × VCON (0.16–1.44 V range); also triggers sleep (<80 mV) and bypass (>1.5 V) modes.
FB	Feedback Input / Bypass Output	Closes regulation loop in PWM/ECO modes; serves as bypass FET source in BP mode.
EN	Digital Enable	Active-high logic input (VIH ≥1.2 V); must not float - tie to SGND or microcontroller GPIO for sequencing.
BPEN	Forced Bypass Enable	Active-high digital override for bypass mode; low or grounded for automatic VCON-based bypass control.
NC	No Connect	Internally tied to SGND; must remain unconnected on PCB to avoid ground loop or noise injection.

Key Features

Feature	Design Value
Auto Mode Transition (PWM ↔ ECO ↔ Bypass)	Seamless, threshold-based switching eliminates manual mode control and firmware overhead in PA bias sequencing.
VCON-Controlled Output Scaling	Enables real-time PA supply adjustment (e.g., 0.8 V for idle, 3.4 V for LTE peak) without external DAC or resistor ladder.
Integrated Synchronous Rectification	Eliminates external Schottky diode; reduces conduction loss and improves efficiency at low V_OUT (e.g., 0.4–1.2 V PA rails).
Thermal & Current Protection	Hardware-enforced shutdown at 150°C (typ.) and cycle-by-cycle PFET current limit (1450 mA typ.) prevent damage under fault conditions.
Soft-Start Function	Gradually ramps switch current limit at enable, limiting inrush into output capacitor and preventing V_OUT overshoot or system reset.

Applications

HSUPA/LTE Handset PA Supply	TD-SCDMA/TD-LTE Transmitter
Use Scenario: Powering multi-mode RF PAs in smartphones where transmit power varies dynamically between voice call (low power) and data burst (high power). IC Role / Device Role / Timing Role: Adjustable buck converter providing precise, low-noise V_PA rail synchronized to baseband controller's VCON command. Use Value: Extends battery life by reducing V_PA during low-power states (e.g., 0.8 V) and enabling full battery voltage (via bypass) only during peak LTE uplink.	Use Scenario: Supplying TD-SCDMA/TD-LTE front-end modules requiring fast V_OUT settling (<5 µs rise/fall) during TDD slot transitions. IC Role / Device Role / Timing Role: High-bandwidth DC-DC regulator with 5-µs V_OUT response to VCON steps, supporting rapid PA bias reconfiguration between uplink/downlink slots. Use Value: Maintains PA linearity and ACLR performance during slot switching by minimizing V_PA droop and ripple (≤50 mVpk load transient).
Hand-Held Radio Transceiver	USB-Powered Portable RF Device
Use Scenario: Delivering regulated 2.8 V or 3.3 V to narrowband FM/DMR PAs in compact handheld radios powered by 3.7 V Li-ion cells. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter operating in PWM mode at medium loads and auto-bypass during high-power transmit bursts. Use Value: Achieves >92% efficiency at 200–500 mA loads while maintaining <50 mV dropout in bypass - critical for thermal management in sealed enclosures.	Use Scenario: Regulating USB 5 V down to 1.8–3.3 V for software-defined radio (SDR) or Bluetooth LE transceivers in portable test equipment. IC Role / Device Role / Timing Role: Low-quiescent (25 µA sleep, 0.1 µA shutdown) DC-DC converter enabling long battery runtime and instant wake-up from host USB enumeration signals. Use Value: Reduces system standby power by >10× versus linear regulators, supporting >100-hour operation on 2000 mAh battery packs.

HSUPA/LTE Handset PA Supply

TD-SCDMA/TD-LTE Transmitter

Use Scenario: Powering multi-mode RF PAs in smartphones where transmit power varies dynamically between voice call (low power) and data burst (high power).

IC Role / Device Role / Timing Role: Adjustable buck converter providing precise, low-noise V_PA rail synchronized to baseband controller's VCON command.

Use Value: Extends battery life by reducing V_PA during low-power states (e.g., 0.8 V) and enabling full battery voltage (via bypass) only during peak LTE uplink.

Use Scenario: Supplying TD-SCDMA/TD-LTE front-end modules requiring fast V_OUT settling (<5 µs rise/fall) during TDD slot transitions.

IC Role / Device Role / Timing Role: High-bandwidth DC-DC regulator with 5-µs V_OUT response to VCON steps, supporting rapid PA bias reconfiguration between uplink/downlink slots.

Use Value: Maintains PA linearity and ACLR performance during slot switching by minimizing V_PA droop and ripple (≤50 mVpk load transient).

Hand-Held Radio Transceiver

USB-Powered Portable RF Device

Use Scenario: Delivering regulated 2.8 V or 3.3 V to narrowband FM/DMR PAs in compact handheld radios powered by 3.7 V Li-ion cells.

IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter operating in PWM mode at medium loads and auto-bypass during high-power transmit bursts.

Use Value: Achieves >92% efficiency at 200–500 mA loads while maintaining <50 mV dropout in bypass - critical for thermal management in sealed enclosures.

Use Scenario: Regulating USB 5 V down to 1.8–3.3 V for software-defined radio (SDR) or Bluetooth LE transceivers in portable test equipment.

IC Role / Device Role / Timing Role: Low-quiescent (25 µA sleep, 0.1 µA shutdown) DC-DC converter enabling long battery runtime and instant wake-up from host USB enumeration signals.

Use Value: Reduces system standby power by >10× versus linear regulators, supporting >100-hour operation on 2000 mAh battery packs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS62675YFFR	3-MHz switching frequency; 600-mA max load; no auto-bypass; requires external feedback resistors.	Lacks integrated bypass FET and VCON analog control - unsuitable for dynamic PA bias but simpler for fixed-output applications.	Select when fixed V_OUT and lower cost outweigh need for PA efficiency optimization.
TPS62260DRVR	2.25-MHz switching; 600-mA load; 16-V max input; no VCON interface; uses resistor-divider feedback.	Higher input voltage range (2.05–6 V) and smaller QFN package, but no analog control or bypass capability.	Prefer for general-purpose portable buck needs where PA-specific features are unnecessary.

Compared with TPS62675YFFR and TPS62260DRVR, LM3262TMX/NOPB uniquely combines VCON-based dynamic output scaling, hardware auto-bypass, and 6-MHz operation in a 1.5-mm DSBGA - making it irreplaceable for space-constrained, battery-sensitive RF PA supply where efficiency across varying transmit power levels is mandatory.

Availability

LM3262TMX/NOPB is available at Aetrix Electronics and suitable for HSUPA/LTE handset design, TD-LTE transceiver development, and battery-powered RF module production requiring stable component supply, consistent DSBGA-9 sourcing, and long-term lifecycle support.

Supply support for LM3262TMX/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 ICs, with decades of expertise in high-efficiency DC-DC conversion and RF power solutions.

The LM3262TMX/NOPB belongs to TI's RF Power Management product line, engineered specifically to maximize PA efficiency and battery life in cellular handsets and portable wireless transceivers through dynamic voltage scaling and ultra-low dropout bypass operation.

FAQ

What is the exact relationship between VCON voltage and VOUT in LM3262TMX/NOPB?

The LM3262TMX/NOPB implements a fixed 2.5× gain from VCON to VOUT: VOUT = 2.5 × VCON. This holds across the valid VCON range of 0.16 V to 1.44 V, yielding an output range of 0.4 V to 3.6 V. The relationship is monotonic and specified with ±3% or ±50 mV linearity error over temperature and load. This analog control eliminates external feedback resistors and enables real-time PA bias adjustment directly from baseband processors.

How does LM3262TMX/NOPB enter and exit bypass mode automatically?

LM3262TMX/NOPB enters bypass mode when VIN − (2.5 × VCON) falls below the negative threshold (VBP,NEG ≈ 200 mV typ.) for longer than 10 µs (TBP,NEG). It exits bypass mode when VIN − (2.5 × VCON) exceeds the positive threshold (VBP,POS ≈ 250 mV typ.) for longer than 0.1 µs (TBP,POS), resuming PWM operation. This hysteresis prevents oscillation and ensures stable transition during battery voltage sag or PA load surges.

What are the thermal protection limits and behavior of LM3262TMX/NOPB?

LM3262TMX/NOPB activates thermal shutdown at a junction temperature of 150°C (typ.), turning off both PFET and NFET switches to halt power delivery. Operation resumes automatically when junction temperature cools to approximately 130°C (typ.). This protection is independent of ambient temperature and load, and is implemented in hardware - no external circuitry required. The device's 85°C/W junction-to-ambient thermal resistance (RθJA) means power dissipation must be managed in high-temperature environments.

Can LM3262TMX/NOPB operate with zero external components beyond the inductor and capacitors?

Yes - LM3262TMX/NOPB requires only three external passive components: one 0.5 µH chip inductor (0805/2012 case), one 10 µF input ceramic capacitor, and one 4.7 µF output ceramic capacitor. No external feedback resistors, compensation networks, or bypass FETs are needed due to its integrated VCON control, internal synchronous rectification, and on-die bypass switch. This minimizes BOM count and PCB area in space-critical RF designs.

What is the minimum startup time and VOUT settling behavior of LM3262TMX/NOPB after EN assertion?

After EN transitions high (with VIN ≥2.5 V), LM3262TMX/NOPB achieves 95% of final VOUT in ≤50 µs (TON spec). Soft-start limits inrush current by ramping the switch current limit in steps, preventing output overshoot and ensuring clean start-up even with large output capacitance. VOUT rise/fall time in response to VCON steps is ≤5 µs (for 2-V steps), supporting rapid PA bias updates in TDD systems.

LM3262TMX/NOPB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 9-WFBGA, DSBGA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Converter, RF Power Amplifier

Voltage - Input:: 2.5V ~ 5.5V

Number of Outputs:: 1

Voltage - Output:: 0.4V ~ 3.6V

Operating Temperature:: -30°C ~ 90°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 9-DSBGA

LM3262TMX/NOPB FAQ

1.How can I place an order for LM3262TMX/NOPB through Aetrix?

Please submit a Request for Quotation (RFQ) for LM3262TMX/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 LM3262TMX/NOPB reliable?

The price and inventory of LM3262TMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM3262TMX/NOPB is usually 5 days.

3.What payment methods are accepted for LM3262TMX/NOPB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM3262TMX/NOPB transactions.

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4.How is shipping managed for LM3262TMX/NOPB?

LM3262TMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM3262TMX/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 LM3262TMX/NOPB?

For technical support, including LM3262TMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM3262TMX/NOPB requirements.

6.How does Aetrix verify that LM3262TMX/NOPB is sourced from the original manufacturer or authorized distributors?

All LM3262TMX/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 LM3262TMX/NOPB meets industry standards.

7.What is the process for return or replacement of LM3262TMX/NOPB?

All LM3262TMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM3262TMX/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 LM3262TMX/NOPB part is unused and in its original packaging.

Return procedure for LM3262TMX/NOPB:

1.Submit a request within 90 days.

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

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