LM64440APPQRYFRQ1

$2.24

Description：IC REG BUCK ADJ 4A 22VQFN
Series：LM644x0-Q1
Mfr：Texas Instruments
Package：Tape & Reel (TR)

SKU:1cfcc1e35833 Category: Voltage Regulators - DC DC Switching Regulators Brand: Texas Instruments

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Product introduction

LM64440APPQRYFRQ1 is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC REG BUCK ADJ 4A 22VQFN. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for LM64440APPQRYFRQ1

Description：IC REG BUCK ADJ 4A 22VQFN
Series：LM644x0-Q1
Mfr：Texas Instruments
Package：Tape & Reel (TR)
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：3V
Voltage - Input (Max)：36V
Voltage - Output (Min/Fixed)：1V
Voltage - Output (Max)：34.2V
Current - Output：4A
Frequency - Switching：2.1MHz
Synchronous Rectifier：Yes
Operating Temperature：-40°C ~ 150°C (TJ)
Mounting Type：Surface Mount, Wettable Flank
Package / Case：22-PowerTFQFN
Supplier Device Package：22-VQFN-HR (3.5x4)
Grade：Automotive
Qualification：AEC-Q100

Voltage Regulators - DC DC Switching Regulators datasheet and documents for LM64440APPQRYFRQ1

LM64440APPQRYFRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM64440APPQRYFRQ1 is an automotive-grade synchronous step-down DC-DC converter manufactured by Texas Instruments. It operates with an input voltage range of 3 V to 36 V and delivers a maximum output current of 4 A. The device features adjustable output voltages from 1 V to 34.2 V and supports switching frequencies up to 2.1 MHz. It utilizes a VQFN-HR-14 package, ensuring low thermal resistance for high-power applications. The component is qualified under AEC-Q100 standards and functions within a junction temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Integrated synchronous buck topology for efficient power conversion
Automotive qualification compliant with AEC-Q100 reliability standards
Wide input voltage capability supporting standard automotive bus architectures

Voltage Regulators - DC DC Switching Regulators Applications

Automotive infotainment system power distribution
ADAS sensor module voltage regulation
Body control unit power management

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number against official Texas Instruments documentation to ensure correct suffix alignment. Confirm that the specific package variant matches design requirements. Cross-reference the datasheet revision history for any updates to electrical characteristics or recommended operating conditions prior to finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems requiring robust automotive-grade power regulation with wide input voltage tolerance. Ensure the application demands a synchronous buck converter capable of handling high transient loads. Verify that the thermal performance of the VQFN-HR-14 package meets the system's heat dissipation constraints under maximum load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM644xx-Q1 family of synchronous step-down converters designed for demanding automotive environments. It shares architectural similarities with other members in the series but offers specific current and voltage configurations tailored for single-output applications. The family emphasizes high efficiency and compact footprint solutions for modern vehicle electronics.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official substitution guides for compatible alternatives such as the LM64460 series for higher current needs or LM62440 variants for different pinout requirements. Ensure any replacement maintains AEC-Q100 qualification and compatible thermal characteristics.

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Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.