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PDF SC1210 Data sheet ( Hoja de datos )
| Número de pieza | SC1210 | |
| Descripción | High Speed- 12V/ Synchronous Power MOSFET Driver | |
| Fabricantes | Semtech | |
| Logotipo |  |
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POWER MANAGEMENT
Description
SC1210
High Speed, 12 V, Synchronous
Powewwr wM.DaOtaSShFeeEt4TU.cDomriver
Features
The SC1210 is a high speed, dual output driver designed
to drive high-side and low-side MOSFETs in a synchro-
nous Buck converter. These drivers can work with many
Semtech PWM controllers to provide a cost effective
multi-phase voltage regulator for advanced micropro-
cessors.
A 30ns max propagation delay from input transition to
the gate of the power FET’s guarantees operation at high
switching frequencies. Internal overlap protection circuit
prevents shoot-through from Vin to PGND in the main
and synchronous MOSFETs. The adaptive overlap pro-
tection circuit ensures the bottom FET does not turn on
until the top FET source has reached 1V, to prevent cross-
conduction.
8.5V gate drive provides optimum enhancement of
MOSFETs at minimum driver and MOSFET switching loss.
High current drive capability allows fast switching, thus
reducing switching losses at high (up to 1.5MHz) frequen-
cies without causing thermal stress on the driver.
Under-voltage-lockout and over-temperature shutdown
features are included for proper protection and safe op-
eration. Timed latches and improved robustness are built
into the safty functions such as the Under Voltage Lock-
out and adaptive Shoot-through protection circuitry to
prevent false triggering. The SC1210 is offered in a stan-
dard SO-8 package.
u High efficiency
u +12V supply voltage with internal LDO for optimum
gate drive
u High peak drive current
u Adaptive non-overlapping gate drives provide
shoot-through protection
u Fast rise and fall times (15ns typical with 3000pf
load)
u Ultra-low (<30ns) propagation delay (BG going low)
u Floating top gate drive
u Crowbar function for over voltage protection
u High frequency (to 1.5 MHz) operation allows use
of small inductors and low cost ceramic capacitors
u Under-voltage-lockout
u Low quiescent current
Applications
u Intel PentiumTM processor power supplies
u AMD AthlonTM and K8TM processor power supplies
u High current low voltage DC-DC converters
Typical Application Circuit
Vin (+12V)
R3
2R2
Q1
R1
PWM
C1 U1
1uF
1 DRN
PGND 8
2 TG
BG 7
3 BST
VREG 6
4 CO
VIN 5
D1
1N4148
SC1210
1R0
C2
1uF
C3
1uF
Q2
C4
10uF
L1
12
R2
1R0
C6
2.2nF
Vout
C5
August 8, 2003
1 www.semtech.com
1 page  
POWER MANAGEMENT
Pin Configuration
Top View
DRN
TG
BST
CO
1
2
3
4
8
7
6
5
PGND
BG
VREG
VIN
SC1210
www.DataSheet4U.com
Ordering Information
Device (1)
SC1210STR
Package
SO-8
Temp Range (TJ)
0° to 125°C
Note:
(1) Only available in tape and reel packaging. A reel
contains 2500 devices.
(SO-8)
Pin Descriptions
Pin # Pin Name
Pin Function
1 DRN The drain node of the low-side MOSFET (or switching node) of the synchronous buck converter.
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 SC1210 supplied by external controller. An internal 50kohm
resistor is connected from this pin to PGND.
5 VIN Supply power for LDO. Connect to input power rail of the converter.
6 VREG LDO output. Decouple with 1µF to 4.7µF (ceramic) with lead length no more than 0.2" (5mm).
7 BG Output gate drive for the synchronous (bottom) MOSFET.
8 PGND Ground. Keep this pin close to the synchronous MOSFETs source.
2003 Semtech Corp.
5
www.semtech.com
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet SC1210.PDF ] | |
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