POWER MANAGEMENT

1

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SC1116

Linear FET Controller

For DDR Supplies

Features

Revision: March 28, 2007

Description

The SC1116 is a low cost controller for low power

linear DDR power supplies.

The SC1116 comes in a space saving SOT-23 6 pin

package.

The SC1116 provides a dual gate drive for the top serial

and bottom parallel MOSFETs with internal shoot through

protection.

The wide range of input voltages (3V to 15V) allows the

chip to work in many various applications.

The variable output voltage is programmable from the

outside with an input divider or an external reference.

Wide range of V

DDR supplies

SCSI

Line termination

Source / Sink LDOs

User can select FETs to optimize system current

rating/dropout/cost

Low V

-40°C to +85°C operating temperature

External compensation capable for low ESR loads

Minimum external components

0.6 mA Quiescent current

Guaranteed no shoot through

SOT-23 6L small package. Fully WEEE and RoHS

compliant

Typical Application Circuit

Applications

Notes:

(1) Values used for optional compensation are 1K and 4.7nF typical.

(2) When using 3V as Vcc, use of low threshold FETs is a must.

REF

3

DRVL

4

VCC

1

FB

5

GND

2

DRVH

6

U1

SC1116

0.1uF

0.1uF

typ

4.7nF

typ

4.7nF

typ

47uF

R1

1k 0.5%

R2

1k 0.5%

typ

1k

typ

1k

Q1

MOS FET N

Q2

MOS FET N

VDDQ=2.5Vtyp

Vcc=3 to 15V

VTT=1.25Vtyp

GND