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

STMicroelectronics E-L6926

Name: E-L6926
Brand: STMicroelectronics
SKU: E-L6926
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: E-L6926

Manufacturer:: STMicroelectronics

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: E-L6926.pdf

Description:: IC REG BUCK ADJ 800MA 8MSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,991

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Product details

Overview

L6926 from STMicroelectronics is a monolithic synchronous step-down DC-DC regulator designed for single-cell Li-ion battery-powered systems. It operates from 2 V to 5.5 V input, delivers up to 800 mA output current, supports adjustable output down to 0.6 V, achieves up to 95% efficiency, and features 600 kHz fixed-frequency current-mode control with external synchronization capability (500 kHz–1.4 MHz). It is used in portable instruments and handheld terminals requiring low quiescent current and dropout operation.

For engineers reviewing the L6926 datasheet, L6926 pinout, L6926 application, or L6926 equivalent, key selection criteria include its 1 µA shutdown current, ±1% output voltage accuracy, Power Good signal, internal synchronous switches eliminating external Schottky diodes, and selectable low-noise/low-consumption modes at light load.

Technical Context

The L6926 implements a slope-compensated current-mode PWM architecture with peak and valley current limiting, enabling stable operation up to 100% duty cycle for ultra-low dropout. Its error amplifier drives the COMP pin to regulate VFB at 0.6 V, with loop stability assured by a 220 pF capacitor to ground.

Mode selection is controlled via the SYNC pin: high (>1.3 V) enables discontinuous low-consumption mode (25–50 µA quiescent), low (<0.5 V) enables continuous low-noise mode (~600 kHz), and external clock injection (500 kHz–1.4 MHz) forces low-noise operation while disabling sync during OVP or short-circuit events.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2 V to 5.5 V - supports full discharge curve of single Li-ion cell (2.7 V–4.2 V) without dropout interruption.
Output Current	800 mA max - sufficient for core logic and RF sections in handheld devices without external boost.
Efficiency	Up to 95% - minimizes thermal rise and extends battery runtime in portable applications.
Quiescent Current	25 µA (low-consumption mode) - enables multi-week standby in always-on sensor nodes.
Switching Frequency	600 kHz fixed or 500 kHz–1.4 MHz synchronized - allows EMI tuning and avoids sensitive IF bands.
Output Accuracy	±1% over line/load/temp - ensures reliable operation of precision analog and digital ICs.
Shutdown Current	0.2 µA max - preserves battery charge during deep sleep or transport storage.

Pinout & Package

Available in TSSOP8 (3×3×1.0 mm) and VFQFPN8 (3×3×0.9 mm) packages, both with exposed thermal pad (E-pad) requiring connection to GND plane for optimal thermal performance (R_thJA = 180 °C/W for TSSOP8, 56 °C/W for VFQFPN8).

Pin/Terminal	Circuit Role	Design Meaning
RUN	Enable/shutdown control input	Active-high logic: >1.3 V enables regulator; <0.4 V disables with 0.2 µA shutdown current.
COMP	Error amplifier output	Drives external RC compensation network (typically 220 pF to GND) to stabilize current-mode loop.
VFB	Feedback input	Senses resistor divider output; regulates VOUT to 0.6 V × (1 + R2/R1); accuracy ±1%.
GND	Power and signal reference	Common return for all internal circuits; E-pad must be soldered to PCB GND plane.
LX	Switch node	Connects to inductor; carries high di/dt switching current; requires tight layout to minimize EMI.
VCC	Input supply and bias rail	Accepts 2–5.5 V; includes UVLO with 100 mV hysteresis; powers internal circuitry and gate drivers.
SYNC	Mode select / sync input	Configures low-noise (low), low-consumption (high), or external sync (500 kHz–1.4 MHz square wave).
PGOOD	Open-drain power-good indicator	Pulls low when VOUT < 90% of target; requires external pull-up to VOUT or VCC for system sequencing.

Key Features

Feature	Design Value
Internal synchronous MOSFETs	Eliminates need for external Schottky diode, reducing BOM count and board area in space-constrained designs.
100% duty-cycle operation	Enables dropout regulation down to V_IN − 100 mV, critical for maintaining output as Li-ion discharges below 3.0 V.
Selectable light-load modes	Low-consumption mode cuts IQ to 25 µA; low-noise mode maintains 600 kHz switching for EMI-sensitive RF sections.
Integrated protections	OVP, short-circuit, thermal shutdown (150 °C), and valley-current limiting prevent damage under fault conditions.
Power Good signal	Provides system-level power sequencing and reset signaling without external supervisor IC.

Applications

Portable Medical Sensors

GPS Navigation Units

Use Scenario: Wearable pulse oximeter powered by coin-cell or single Li-ion battery with multi-day runtime requirement.

IC Role / Device Role / Timing Role: Primary system regulator delivering 1.8 V to MCU and analog front-end, operating in low-consumption mode during sensor idle periods.

Use Value: 25 µA quiescent current extends battery life beyond 14 days; 0.6 V minimum output supports next-gen ultra-low-voltage sensors.

Use Scenario: Automotive-grade handheld GPS receiver with cold-start requirement and RF noise sensitivity.

IC Role / Device Role / Timing Role: Core 3.3 V supply for GPS baseband processor and RF front-end, synchronized to 1.2 MHz to avoid L1 band interference.

Use Value: External sync eliminates beat frequencies with GPS sampling clocks; ±1% accuracy ensures stable ADC reference voltage.

Industrial Handheld Terminals

Smart Energy Meters

Use Scenario: Ruggedized barcode scanner with backlight, Bluetooth, and flash memory, operating across -20 °C to 60 °C ambient.

IC Role / Device Role / Timing Role: Main 2.8 V supply for display driver and microcontroller, using PGOOD for safe boot sequence initiation.

Use Value: PGOOD enables firmware-controlled power-up only after stable rail; thermal shutdown (150 °C) prevents latch-up in sealed enclosures.

Use Scenario: Battery-backed AMI meter requiring decade-long field operation with infrequent wake-ups.

IC Role / Device Role / Timing Role: Always-on 1.2 V supply for real-time clock and backup RAM, operating in low-consumption mode between hourly reads.

Use Value: 0.2 µA shutdown current limits annual battery drain to <1% capacity; 100% duty cycle sustains output during brownout events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Texas Instruments TPS62231	Fixed 3.3 V output (non-adjustable); 3.6 V max input; 300 mA output; 2.25 MHz switching.	Not suitable for adjustable or sub-3.3 V outputs; higher frequency reduces inductor size but increases EMI risk near RF bands.	Select only if fixed 3.3 V output and compact inductor size outweigh need for flexibility and noise control.
Analog Devices ADP2301	3 A output; 3.0–20 V input; no PGOOD; no sync input; 700 kHz fixed frequency.	Over-specified for portable battery apps; lacks light-load mode selection and system monitoring features needed in handhelds.	Prefer for industrial 12 V input rails where higher current and ruggedness matter more than battery optimization.

Compared with TPS62231 and ADP2301, the L6926 uniquely balances Li-ion compatibility (2 V start), ultra-low IQ, adjustable output, PGOOD, and EMI-controllable sync-making it optimal for space- and battery-constrained portable electronics.

Availability

L6926 is available at Aetrix Electronics and suitable for portable medical sensors, GPS navigation units, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for L6926 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, Switzerland, with design, manufacturing, and R&D operations across Europe, Asia, and the Americas.

The L6926 belongs to ST's high-efficiency DC-DC converter product line, engineered specifically for battery-powered portable equipment demanding minimal quiescent current, wide input range, and robust protection features.

FAQ

What is the minimum input voltage required to start up the L6926?

The L6926 has a typical turn-on threshold of 2.2 V and operates continuously down to 2.0 V. Startup is guaranteed at 2.2 V (with 100 mV hysteresis), enabling reliable operation across the full discharge curve of a single Li-ion cell, including end-of-life voltage levels below 3.0 V.

How does the L6926 achieve 100% duty cycle operation?

The L6926 disables switching and holds the high-side MOSFET fully on when the feedback voltage drops near regulation, allowing VIN to pass directly to VOUT with only R_DS(on) drop. This occurs automatically during low-input or high-load conditions and is enabled by its current-mode architecture and valley-current limiting.

Can the PGOOD pin drive a microcontroller reset input directly?

No - PGOOD is an open-drain output requiring an external pull-up resistor (typically to VOUT or VCC). To interface with a standard MCU reset pin, connect a 10 kΩ pull-up to VOUT and verify the MCU's reset threshold and hysteresis; the 90% VOUT trip point and 4 mV hysteresis must align with the MCU's reset specification.

Is external compensation mandatory for stable operation?

Yes - a 220 pF capacitor from COMP to GND is the baseline compensation network specified for stability across most loads. For very low-ESR ceramic output capacitors, adding a 50 kΩ series resistor improves transient response and prevents oscillation during large load steps, as confirmed in ST's application note AN2817.

E-L6926 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2V

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

E-L6926 FAQ

1.How can I place an order for E-L6926 through Aetrix?

Please submit a Request for Quotation (RFQ) for E-L6926 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 E-L6926 reliable?

The price and inventory of E-L6926 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L6926 is usually 5 days.

3.What payment methods are accepted for E-L6926?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L6926 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-L6926?

E-L6926 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your E-L6926 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 E-L6926?

For technical support, including E-L6926 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L6926 requirements.

6.How does Aetrix verify that E-L6926 is sourced from the original manufacturer or authorized distributors?

All E-L6926 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 E-L6926 meets industry standards.

7.What is the process for return or replacement of E-L6926?

All E-L6926 units undergo pre-shipment inspection (PSI). If there is an issue with E-L6926, 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 E-L6926 part is unused and in its original packaging.

Return procedure for E-L6926:

1.Submit a request within 90 days.

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

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