0

10

20

30

40

50

60

70

80

0

200

400

600

800

1000

Frequency (MHz)

Evaluation Board

EN 55022 Class B Limit

EN 55022 Class A Limit

C001

C001

SW

VIN

PGND

CBOOT

VCC

BIAS

SYNC

RT

ENABLE

SS/TRK

AGND

FB

LM43602Q

L

PGOOD

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

LM43602-Q1

SNVSA83A – APRIL 2015 – REVISED MAY 2015

LM43602-Q1 SIMPLE SWITCHER® 3.5 V to 36 V 2-A Synchronous Step-Down Voltage

Converter

1 Features

3 Description

1

•

LM43602-Q1 is an Automotive-Grade Product that

an

easy-to-use

synchronous

step-down

DC-DC

is AEC-Q100 Qualified (-40°C to +125°C

converter capable of driving up to 2 A of load current

from an input voltage ranging from 3.5 V to 36 V (42

•

27 µA Quiescent Current in Regulation

V abs max). The LM43602-Q1 provides exceptional

efficiency, output accuracy and dropout voltage in a

•

High Efficiency at Light Load (DCM and PFM)

very small solution size. An extended family is

•

Meets EN55022/CISPR 22 EMI Standards

available in 0.5 A , 1 A, and 3 A load current options

•

Integrated Synchronous Rectification

in pin-to-pin compatible packages. Peak current

•

Adjustable Frequency Range: 200 kHz to 2.2 MHz

mode control is employed to achieve simple control

(500 kHz default)

loop

compensation

and

cycle-by-cycle

current

limiting. Optional features such as programmable

•

Frequency Synchronization to External Clock

switching frequency, synchronization, power-good

•

Internal Compensation

flag, precision enable, internal soft-start, extendable

•

Stable with Almost Any Combination of Ceramic,

soft-start, and tracking provide a flexible and easy to

Polymer, Tantalum, and Aluminum Capacitors

use platform for a wide range of applications.

Discontinuous conduction and automatic frequency

•

Power-Good Flag

modulation at light loads improve light load efficiency.

•

Soft-Start into a Pre-Biased Load

The family requires few external components and

•

Internal Soft-Start: 4.1 ms

terminal arrangement allows simple, optimum PCB

layout. Protection features include thermal shutdown,

•

Extendable Soft-Start Time by External Capacitor

•

Output Voltage Tracking Capability

and output short circuit protection. The LM43602-Q1

•

Precision Enable to Program System UVLO

device is available in the HTSSOP / PWP 16-pin

•

Output Short-Circuit Protection with Hiccup Mode

leaded package (5.1 mm x 6.6 mm x 1.2 mm).

•

Overtemperature Thermal Shutdown Protection

Device Information

PART NUMBER

PACKAGE

BODY SIZE

2 Applications

LM43602-Q1

HTSSOP (16)

5.1 mm x 6.6 mm

•

Sub-AM Band Automotive

•

Industrial Power Supplies

•

•

High Efficiency Point-Of-Load Regulation

•

Telecommunications Systems

4 Simplified Schematic

Radiated Emission Graph

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.