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Advanced Analog Technology, Inc.

AAT1351

Details are subject to change without notice

2-CHANNEL SWITCHING REGULATOR

FEATURES

Complete PWM Power Control Circuitry

Under-Voltage Lockout (UVLO) Protection

Open Drain Output

Output Short Circuit Protection

Low Dissipation Current錛?.6mA

Dead-Time Control錛?% to 100%

Wide Operating Frequency錛?/div>

10 kHz to 800 kHz

GENERAL DESCRIPTION

The AAT1351 provides an integrated two-channel

pulse-width-modulation (PWM) solution for the

power supply of DC-DC system; this device offers

the systems engineer flexibility to tailor-make the

power supply circuitry for specific applications.

Each channel contains its own error amplifier,

PWM comparator, dead鈥搕ime control (DTC) and

output driver. The under-voltage protection,

oscillator, short circuit protection and voltage

reference circuit are the common features for the

two channels.

Both channels of AAT1351 can be used for DC-DC

converter operations including step-up, step-down,

and inverting. Dead-time control can be set to

provide 0% to 100% dead-time through a resistive

divider network. Soft-start can be implemented by

paralleling the DTC resistor with a capacitor. Two

dead-time control inputs are assigned for channel 1

(CH1) and channel 2 (CH2) individually, and dead-

time control inputs can be used to control on / off

operation.

With a minimum number of external components,

the AAT1351 offers a simple and cost effective

solution.

V

DD

Range

錛?/div>

4.0V to 14.0V

PIN CONFIGURATION

TOP VIEW

C

t

R

t

NE1

IE1

OE1

DTC1

OUT1

GND

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

V

REF

SCP

NE2

IE2

OE2

DTC2

OUT2

V

DD

SOP-16 PACKAGE

鈥?/div>

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鈥?/div>

Advanced Analog Technology, Inc

.

鈥?/div>

Page 1 of 16

V1.0

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