SC1211 Semtech Corporation, SC1211 Datasheet - Page 6

• Manufacturer Part Number: SC1211
• Description: Combi-SenseTM Synchronous MOSFET Driver
• Manufacturer: Semtech Corporation

POWER MANAGEMENT
Pin Configuration
Pin Descriptions
Pin #
PAD
2003 Semtech Corp.
2
3
4
5
6
7
8
1
Pin Name
DRN
BST
PGND
VREG
DRN
CO
BST
VPN
TG
VIN
TG
CO
BG
EXPOSED PAD MUST BE SOLDERED
TO POWER GROUND PLANE
subjected to a negative spike up to -V
Output gate drive for the switching (top) MOSFET.
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).
Logic level PWM input signal to the SC1211 supplied by external controller. An internal 50kohm
resistor is connected from this pin to PGND.
Virtual Phase Node. Connect an RC between this pin and the output sense point to Enable
Combi-Sense
Supply power for LDO and the internal Combi-Sense
converter.
LDO output. Decouple with 1µF to 4.7µF (ceramic) with lead length no more than 0.2" (5mm).
Output gate drive for the synchronous (bottom) MOSFET.
Ground. Keep this pin close to the synchronous MOSFETs source.
The power phase node (or switching node) of the synchronous buck converter. This pin can be
1
2
3
4
(Power SOIC-8)
Top View
8
7
6
5
TM
operation. See the Typical Application Circuit.
BG
VREG
VIN
VPN
REG
6
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
relative to PGND without affecting operation.
Ordering Information
Pin Function
SC1211STR
Device
(1)
TM
circuitry. Connect to input power rail of the
EDP SO-8
Package
Temp Range (T
0° to 125°C
www.semtech.com
SC1211
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)