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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

STMicroelectronics L6925D013TR

Name: L6925D013TR
Brand: STMicroelectronics
SKU: L6925D013TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L6925D013TR

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: L6925D013TR.pdf

Description:: IC REG BUCK ADJ 800MA 8MSOP

Quantity:: RFQ Add To RFQ list

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Inventory:1,900

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Product details

Overview

L6925D013TR from STMicroelectronics is a monolithic synchronous step-down DC-DC regulator designed for single Li-ion battery-powered systems. It operates from 2.7V to 5.5V input, delivers up to 800mA output current, supports adjustable output voltage down to 0.6V with ±1% accuracy, and achieves up to 95% efficiency in portable instrumentation and cellular handsets.

For engineers reviewing the L6925D013TR datasheet, L6925D013TR pinout, L6925D013TR application, or L6925D013TR equivalent, key selection criteria include its 600kHz fixed-frequency current-mode control, externally synchronizable clock (500kHz–1.4MHz), selectable low-noise/low-consumption mode, and integrated low-battery detection (LBI/LBO) functionality.

Technical Context

The L6925D013TR implements a current-mode PWM controller with internal high-side (240mΩ) and low-side (215mΩ) MOSFETs, enabling 100% duty-cycle operation for ultra-low dropout performance. Its error amplifier features 0.6V reference (±1%) and 25nA input bias, supporting precise feedback via external resistor divider.

SYNC pin serves dual function: logic-level selection between low-noise (VSYNC = 0V) and low-consumption (VSYNC = VCC) modes, or external clock synchronization. LBI/LBO pins provide programmable battery undervoltage detection with 0.6V internal threshold and open-drain LBO output requiring external pull-up.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V to 5.5V - supports single Li-ion cell (fully discharged to 2.7V) without dropout
Output Current Max	800mA - sufficient for core logic rails in handheld devices
Feedback Reference	0.6V ±1% - enables precise output setting from 0.6V to V_IN using external resistors
Switching Frequency	600kHz fixed, 500–1400kHz syncable - balances EMI control and inductor size
Quiescent Current	25µA (low-consumption mode) - extends battery life in standby
Peak Current Limit	1.2A - provides robust short-circuit protection with margin over 800mA load
Thermal Shutdown	150°C - protects against sustained overload or poor PCB thermal design

Pinout & Package

Package: MSOP8 (3mm × 3mm body, 0.65mm pitch), RoHS-compliant, surface-mount.

Pin/Terminal	Circuit Role	Design Meaning
1 LBI	Battery low detector input	Accepts divided battery voltage; triggers LBO when ≤0.6V (internal threshold)
2 COMP	Error amplifier output	Requires 220pF capacitor to ground for loop compensation
3 VFB	Feedback input	Compares output divider voltage to 0.6V reference; sets regulated output
4 GND	Power and signal ground	Common return for control circuitry and power stage
5 LX	Switch node	Connects to inductor; carries high di/dt switching current; requires low-inductance layout
6 VCC	Input supply	Primary power input (2.7–5.5V); powers internal circuitry and gate drivers
7 SYNC	Mode select / sync input	Logic-high selects low-consumption mode; external clock input enables noise-sensitive timing alignment
8 LBO	Low-battery open-drain output	Asserts low when LBI < 0.6V; requires external pull-up to regulated output or VCC

Key Features

Feature	Design Value
Integrated synchronous MOSFETs	Eliminates need for external Schottky diode and reduces conduction losses
100% duty-cycle capability	Enables regulation down to V_OUT ≈ V_IN − I_LOAD×R_DS(on), critical for Li-ion end-of-discharge
Selectable operating mode	Low-noise mode (230µA IQ) for RF sections; low-consumption mode (25µA IQ) for extended battery life
Programmable low-battery detection	LBI/LBO pair allows system-level battery monitoring without external comparator
Overvoltage & short-circuit protection	Hard OVP at +10% V_OUT and cycle-by-cycle current limiting prevent damage during fault conditions

Applications

Cellular Handsets

Portable Medical Instruments

Use Scenario: Powering baseband processor core voltage (1.2–1.8V) from single Li-ion cell.

IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering stable, low-noise core rail.

Use Value: 95% efficiency and 25µA quiescent current extend talk time; 100% duty cycle maintains regulation until battery reaches 2.7V.

Use Scenario: Supplying ADC reference and sensor interface rails in battery-operated glucose meters.

IC Role / Device Role / Timing Role: Precision-adjustable power source with ±1% output accuracy and low ripple.

Use Value: 0.6V feedback reference enables accurate scaling to 2.5V/3.3V rails; LBO signal triggers low-battery alert before measurement error occurs.

GPS Receivers

PDAs and Handheld Terminals

Use Scenario: Generating clean 1.8V RF front-end supply in compact GPS modules.

IC Role / Device Role / Timing Role: Synchronizable buck converter minimizing switching noise near sensitive GNSS receivers.

Use Value: External clock sync (500–1400kHz) shifts noise spectrum away from L1 band (1575.42MHz); low-noise mode reduces phase noise impact on signal acquisition.

Use Scenario: Providing main system rail (3.3V) and I/O rail (1.8V) in multi-voltage PDA platforms.

IC Role / Device Role / Timing Role: Dual-rail support via reconfigurable feedback network and shared power stage.

Use Value: Single IC replaces two discrete regulators; SYNC pin enables coordinated switching to reduce input ripple and simplify filtering.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS62231DRVR	3MHz fixed frequency, 600mA max output, 2.05V–6.5V input, no LBI/LBO	Lacks battery monitoring; higher switching frequency reduces inductor size but increases EMI risk near RF bands	Preferred where board space is constrained and battery monitoring is handled externally
MAX8640YETA+	2.5V–5.5V input, 1A output, 2.25MHz, integrated soft-start, no sync or LBO	Higher current rating and faster transient response, but no low-battery signaling or external sync capability	Chosen when driving higher-current peripherals like displays or USB PHYs

Compared with TPS62231DRVR and MAX8640YETA+, the L6925D013TR uniquely combines battery monitoring (LBI/LBO), external synchronization, and 100% duty-cycle operation-making it optimal for space-constrained, battery-critical Li-ion systems where runtime visibility and noise control are essential.

Availability

L6925D013TR is available at Aetrix Electronics and suitable for cellular handsets, portable medical instruments, and GPS receivers requiring stable component supply across production lifecycles.

Supply support for L6925D013TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The L6925D belongs to ST's high-efficiency DC-DC converter product line, engineered specifically for battery-powered portable electronics demanding ultra-low quiescent current, precise voltage regulation, and integrated system monitoring functions.

FAQ

What is the minimum input voltage required to maintain regulation?

The L6925D013TR features 100% duty-cycle operation, allowing regulation down to an input voltage equal to the output voltage plus I_LOAD × R_DS(on). With typical R_DS(on) of 240mΩ and 800mA load, it sustains regulation until V_IN ≈ V_OUT + 0.19V. Its UVLO turns off below 2.65V, ensuring safe shutdown before deep discharge.

How is the low-battery detection threshold set?

The LBI pin has a fixed 0.6V internal comparator threshold. To detect battery voltage below a custom level (e.g., 3.0V), connect a resistor divider from battery to GND with tap to LBI. For 3.0V detection, use R1=4.0kΩ (to battery) and R2=800Ω (to GND), yielding 0.6V at LBI when V_BAT = 3.0V.

Can the SYNC pin be left unconnected?

No - SYNC must be actively driven. Floating SYNC may cause undefined mode behavior. Tie to GND for low-noise mode (230µA IQ) or to VCC for low-consumption mode (25µA IQ). For synchronization, drive with clean CMOS clock (500–1400kHz); do not leave floating or capacitively coupled.

What is the recommended output capacitor ESR range?

The L6925D013TR is optimized for ceramic output capacitors with ESR < 10mΩ. The datasheet specifies 10µF/6.3V X5R/X7R ceramics (e.g., 0805 or 1206). Low-ESR minimizes output ripple and ensures stability with the internal compensation network; aluminum or tantalum caps are not recommended due to higher ESR and potential instability.

L6925D013TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.7V

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 0.6V

Voltage - Output (Max):: 5.5V

Current - Output:: 800mA

Frequency - Switching:: 600kHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-MSOP

L6925D013TR FAQ

1.How can I place an order for L6925D013TR through Aetrix?

Please submit a Request for Quotation (RFQ) for L6925D013TR 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 L6925D013TR reliable?

The price and inventory of L6925D013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L6925D013TR is usually 5 days.

3.What payment methods are accepted for L6925D013TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L6925D013TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L6925D013TR?

L6925D013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L6925D013TR 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 L6925D013TR?

For technical support, including L6925D013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L6925D013TR requirements.

6.How does Aetrix verify that L6925D013TR is sourced from the original manufacturer or authorized distributors?

All L6925D013TR 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 L6925D013TR meets industry standards.

7.What is the process for return or replacement of L6925D013TR?

All L6925D013TR units undergo pre-shipment inspection (PSI). If there is an issue with L6925D013TR, 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 L6925D013TR part is unused and in its original packaging.

Return procedure for L6925D013TR:

1.Submit a request within 90 days.

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

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