LTC3302

1

Rev. 0

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

5V, 2A Synchronous Step-Down

Regulator in 2mm

× 2mm FCQFN

The LTC®3302 is a very small, high efficiency, low

noise, monolithic synchronous 2A step-down DC/DC

converter operating from a 2.25V to 5.5V input supply.

Using constant frequency, peak current mode control,

this regulator achieves fast transient response with small

external components.

The LTC3302 operates in forced continuous or pulse-

skipping mode for low noise, or in low-ripple Burst Mode

operation for high efficiency at light loads, ideal for bat-

tery-powered systems. The IC regulates output voltages

as low as 500mV. The adjustable version operates from

500mV to VIN with two additional external resistors. Other

features include output overvoltage protection, short-cir-

cuit protection, thermal shutdown, clock synchronization,

and up to 100% duty cycle operation for low dropout.

The LTC3302 is available in a low profile 2mm × 2mm

FCQFN package with exposed pad and side wettable flanks.

High Efficiency, 2MHz, 1V, 2A Step-Down Converter

Efficiency and Power Loss

in Burst Mode Operation

APPLICATIONS

n

High Efficiency: 30mΩ NMOS, 85mΩ PMOS

n

Peak Current Mode Control

n

27ns Minimum On-Time

n

Wide Bandwidth, Fast Transient Response

n

Low-Ripple Burst Mode® Operation with IQ of 80µA

n

Up to 6MHz Operation

n

Safely Tolerates Inductor Saturation in Overload

n

VIN Range: 2.25V to 5.5V

n

Fixed VOUT Range: 0.5V to 3.65V, Factory

Programmed in 50mV Steps

n

VOUT Accuracy: ±1% Overtemperature Range

n

Precision 400mV Enable Threshold

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Shutdown Current: 1µA

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Power Good, Internal Compensation and Soft-Start

n

Thermally Enhanced, 12-Pin, 2mm × 2mm, Flip Chip

(FCQFN) Package with Side Wettable Flanks

n

AEC-Q100 Qualified for Automotive Applications

n

Optical Networking, Servers, Telecom

n

Automotive, Industrial, Communications

n

Distributed DC Power Systems (POL)

n

FPGA, ASIC, µP Core Supplies

All registered trademarks and trademarks are the property of their respective owners.

3302 TA01a

EN

SW

VIN

AVIN

PGND

10µF

680nH

1µF

22µF

VOUT

1.0V

2A

VIN = 2.25V TO 5.5V

VOUT

PGOOD

LTC3302A-1

1µF

0201

AGND

MODE/SYNC

fOSC = 2MHz

VIN = 3.3V

VOUT = 1.0V

fSW = 2MHz

TDK TFM201610ALMAR68MTAA

EFFICIENCY

POWER LOSS

LOAD CURRENT (A)

0.001

0.01

0.1

1 2

0

10

20

30

40

50

60

70

80

90

100

0.0001

0.001

0.01

0.1

1

10

3302 TA01b