US1175

2-1

Rev. 1.2

11/29/99

7.5A ULTRA LOW DROPOUT POSITIVE

ADJUSTABLE REGULATOR

The US1175 product is a 7.5A 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 very low dropout such as

2.8V from 3.3V ATX power supplies where the same

efficiency as the switcher can be achieved without

the cost and complexity associated with switching

regulators. One such application is the new graphic

chip sets that requires 2.7V supply such as the Intel

I740 chip set.

DESCRIPTION

DESCRIPTION

0.5V Dropout at 7.5A (Equivalent of 67m

Ω)

Ω)

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

Typical application of US1175 .

PACKAGE ORDER INFORMATION

PACKAGE ORDER INFORMATION

Tj (

5 PIN PLASTIC

5 PIN PLASTIC

8 PIN PLASTIC

TO263 (M)

POWER FLEX (P)

SOIC (S)

0 TO 125

US1175CM

US1175CP

US1175CS

3.3V

US1175

2.7V

C1

C3

1175app1-1.0

5V

C2

R1

R2

1

2

3

4

5

Vsense

Adj

Vout

Vctrl

Vin