SC1211 查看數據表（PDF） - Semtech Corporation

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产品描述 (功能)

比赛名单

SC1211

High Speed, Combi-Sense™ Synchronous MOSFET Driver

Semtech Corporation 

SC1211

POWER MANAGEMENT

Pin Configuration

Top View

DRN 1

8

TG 2

7

BST 3

6

CO 4

5

BG

VREG

VIN

VPN

Ordering Information

Device (1)

SC1211STR

Package

EDP SO-8

Temp Range (TJ)

0° to 125°C

Note:

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

contains 2500 devices.

EXPOSED PAD MUST BE SOLDERED

TO POWER GROUND PLANE

(Power SOIC-8)

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 negative spike up to -VREG 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 SC1211 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 to Enable

Combi-Sense TM operation. See the Typical Application Circuit.

6

VIN

Supply power for LDO and the internal Combi-Sense TM circuitry. Connect to input power rail of the

converter.

7

VREG LDO output. Decouple with 1µF to 4.7µF (ceramic) with lead length no more than 0.2" (5mm).

8

PAD

BG

PGND

Output gate drive for the synchronous (bottom) MOSFET.

Ground. Keep this pin close to the synchronous MOSFETs source.

 2003 Semtech Corp.

6

www.semtech.com

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