1.5A Low Dropout Positive Fixed-Mode Regulator

AP033

Anachip Corp.

www.anachip.com.tw

Rev.1.0 Aug.27, 2004

2/5

Block Diagram

1

THERMAL

SHUTDOWN

2

3 Vout

GND

1.25V

+

+

CURRENT

LIMIT

Vin

+

－

+

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

Vin

DC Supply Voltage

-0.3 to 14

V

Power Dissipation

Internally Limited

Storage Temperature

-65 to +150

Operating Junction Temperature Range

0 to +150

Parameter

Conditions

Min. Typ. Max. Units

Output Voltage

3.267

3.235

3.300

3.300

3.333

3.365

V

V

Line Regulation

0.5

1.0

10

10

mV

mV

Load Regulation

3

8

15

33

mV

mV

Dropout Voltage

1.3

1.4

V

Current Limit

1.6

A

Quiescent Current

5

10

mA

Thermal Regulation

0.008 0.04

%/W

Ripple Rejection

AP033

60

72

dB

Temperature Stability

0.5

%

Thermal Resistance

Junction-to-Ambient

(No heat sink ;No air

flow)

TO-252

101

Thermal Resistance

Junction-to-Case

TO-252: Control Circuitry/Power Transistor

10

Note 1: See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are

measured at a constant junction temperature by low duty cycle pulse testing.

Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 2W. Power dissipation is determined by the

input/output differential and the output current.

Note 3: Dropout voltage is specified over the full output current range of the device.

Note 4: AP033 is guaranteed to operate at higher peak current than 1.6 Amp. See the thermal regulation specifications for changes in

output voltage due the heating effects.