AIC1596

3A STEP-DOWN PWM REGULATOR

SPEC NO: DS-1596-P1 03/23/00

ANALOG INTEGRATIONS CORPORATION

www.analog.com.tw

4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.

TEL: (8863)577-2500 FAX:(8863)577-2510

3

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX.

UNIT

Input Voltage

4.5

36

V

2.5

V

3.3

V

5.0

V

Fixed Output Voltage

12.0

V

Feedback Voltage

AIC1596 Adjustable

1.25

V

Output Voltage Regulation

4

%

Quiescent Current

Internal switch off

1

5

mA

Shutdown Quiescent Current

SHDN = 5V (OFF)

80

µA

Logic Input High

(Regulator OFF)

2

V

Logic Input Low

(Regulator ON )

0.8

V

Oscillator Frequency

AIC1596A series

150

Oscillator Frequency

AIC1596B series

300

KHz

Output Current Limit

3.0

A

Over Voltage Protection

120

%

Maximum Duty Cycle

100

%

Efficiency

Vo=5V , Io=3A

90

%

PIN 1: IN

Supply

voltage

input

for

the

IC

switching regulator. A suitable input

bypass capacitor must be present at

this pin to minimize voltage transients

and to supply the switching currents

needed by the regulator.

PIN 2:OUT

Internal switch. The voltage at this pin

proximately –0.5V, with a duty cycle of

PIN 3: GND

Ground requires a short, low noise

connection

to

ensure

good

load

regulation.

PIN 4: FB

Feedback input for fixed-output or

adjustable-output version. Connect di-

rectly to output for fixed operation

version or to a resistor divider for ad-

justable operation versions.

PIN 5: SHDN Allows the switching regulator circuit

to be shutdown using logic level sig-

nals thus dropping the total input sup-

ply current to approximately 80

µA.

Drive it high to disable the reference,

control circuitry and internal switches.

Drive low or connect to GND for nor-

mal operation.