SC1211VX 데이터 시트보기 (PDF) - Semtech Corporation

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SC1211VX

High Speed, Combi-Sense®, Synchronous MOSFET Driver for Mobile Applications

Semtech Corporation 

POWER MANAGEMENT

Pin Configuration

DRN 1

TG 2

BST 3

CO 4

8

BG

7

VCC

6

VIN

5

VPN

EXPOSED PAD MUST BE SOLDERED

TO POWER GROUND PLANE

SC1211VX

Ordering Information

Device (1)

Package

SC1211VXSTR

EDP SO-8

SC1211VXSTRT(2)

EDP SO-8

Temp Range (TJ)

0° to 125°C

0° to 125°C

Note:

(1) Only available in tape and reel packaging. A reel

contains 2500 devices.

(2). SC1211VXSTRT is lead free part.

Pin Descriptions

Pin # Pin Name

Pin Function

1

DRN

The power phase node (or switching node) of the synchronous Buck converter. This pin can be

subjected to a negtative spike up to -Vcc relative to PGND without affecting operation.

2

TG

Output gate drive for the switching (top) MOSFET.

3

BST

Bootstrap pin. A capacitor is connected between BST and DRN pins to develop the floating

bootstrap voltage for the high-side MOSFET. The capacitor value is typically 1µF (ceramic).

4

CO

Logic level PWM input signal to the SC1211VX supplied by external controller. An internal 50kohm

resistor is connected from this pin to PGND.

5

VPN

Virtual Phase Node. Connect an RC between this pin and the output sense point of the converter to

enable Combi-Sense ® operation. See the Typical Application Circuit.

6

VIN

Sensing input for internal Combi-Sense ® circuitry. Connect as close as possible to the Drain of

the top MOSFET.

7

VCC

Supply power for the SC1211VX. Connect to 5V supply for optimum operation. A 1.0uF-4.7uF

Capacitor must be connected from this pin to PGND as close as possible.

8

BG

Output gate drive for the synchronous (bottom) MOSFET.

PAD PGND Ground. Keep this pin close to the synchronous MOSFET source.

 2005 Semtech Corp.

6

www.semtech.com

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