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1 Features

1? Qualified for Automotive Applications

? AEC-Q100 Qualified With the Following Results:

– Device Temperature Grade 2: –40°C to

+125°C Ambient Operating Temperature

? 27-μA Quiescent Current in Regulation

? High Efficiency at Light Load (DCM and PFM)

? Meets EN55022/CISPR 22 EMI Standards

? Integrated Synchronous Rectification

? Adjustable Frequency Range: 200 kHz to 2.2 MHz

(500 kHz default)

? Frequency Synchronization to External Clock

? Internal Compensation

? Stable with Almost Any Combination of Ceramic,

Polymer, Tantalum, and Aluminum Capacitors

? Power-Good Flag

? Soft Start into a Pre-Biased Load

? Internal Soft Start: 4.1 ms

? Extendable Soft-Start Time by External Capacitor

? Output Voltage Tracking Capability

? Precision Enable to Program System UVLO

? Output Short-Circuit Protection with Hiccup Mode

? Overtemperature Thermal Shutdown Protection

? Create a Custom Design Using the LM43602-Q1

With the WEBENCH? Power Designer

2 Applications

? Sub-AM Band Automotive

? Industrial Power Supplies

? General Purpose Wide VIN Regulation

? High Efficiency Point-Of-Load Regulation

? Telecommunications Systems

3 Description

The LM43602-Q1 regulator is an easy-to-use

synchronous step-down DC-DC converter capable of

driving up to 2 A of load current from an input voltage

ranging from 3.5 V to 36 V (42 V abs maximum). The

LM43602-Q1 provides exceptional efficiency, output

accuracy and dropout voltage in a very small solution

size. An extended family is available in 0.5-A , 1-A,

and 3-A load current options in pin-to-pin compatible

packages. Peak current mode control is employed to

achieve simple control loop compensation and cycleby-

cycle current limiting. Optional features such as

programmable switching frequency, synchronization,

power-good flag, precision enable, internal soft-start,

extendable soft-start, and tracking provide a flexible

and easy to use platform for a wide range of

applications. Discontinuous conduction and automatic

frequency modulation at light loads improve light load

efficiency. The family requires few external

components and pin arrangement allows simple,

optimum PCB layout. Protection features include

thermal shutdown, VCC undervoltage lockout, cycleby-

cycle current limit, and output short-circuit

protection. The LM43602-Q1 device is available in

the HTSSOP (PWP) 16-pin leaded package (6.6 mm

× 5.1 mm × 1.2 mm).The LM43602A-Q1 version is

optimized for PFM operation and recommended for

new designs. The device is pin-to-pin compatible with

LM4360x and LM4600x family.