US1150

2-1

Rev. 1.2

10/28/99

4A ULTRA LOW DROPOUT POSITIVE

ADJUSTABLE REGULATOR

The US1150 product is a 4A regulator with extremely

low dropout voltage using a proprietary Bipolar pro-

cess that achieves comparable equivalent on re-

sistance to that of discrete MOSFETs. This product is

specifically designed to provide well regulated supply for

applications requiring 2.8V or lower voltages from

3.3V ATX power supplies where high efficiency of

a switcher can be achieved without the cost and

complexity associated with switching regulators.

One such application is the new graphic chip sets that

require anywhere from 2.4V to 2.7V supply such as the

Intel I740 chip set.

DESCRIPTION

DESCRIPTION

0.7V Dropout at 4A

Fast Transient Response

1% Voltage Reference Initial Accuracy

Built-in Thermal Shutdown

PRELIMINARY DATASHEET

APPLICATIONS

APPLICATIONS

FEATURES

FEATURES

3.3V to 2.7V Intel I740 chip set.

TYPICAL APPLICATION

TYPICAL APPLICATION

3.3V

US1150

2.7V

C1

C3

1150app1-1.0

5V

C2

R1

R2

1

2

3

4

5

Vsense

Adj

Vout

Vctrl

Vin

Tj (

5 PIN PLASTIC

5 PIN PLASTIC

8 PIN PLASTIC

TO263 (M)

POWER FLEX (P)

SOIC (S)

0 TO 125

US1150CM

US1150CP

US1150CS

Typical application of US1150 in a 3.3V to 2.7V for I740 chip.

PACKAGE ORDER INFORMATION

PACKAGE ORDER INFORMATION