sc1210str

Manufacturer Part Numbersc1210str
DescriptionSc1210 High-speed 12 V Synchronous Power Mosfet Driver
ManufacturerSemtech Corporation
sc1210str datasheet
 
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POWER MANAGEMENT
Description
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.
Typical Application Circuit
Vin (+12V)
C1
1
DRN
1uF
2
TG
3
PWM
BST
4
CO
D1
1N4148
August 8, 2003
Features
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 Pentium
u
AMD Athlon
u
High current low voltage DC-DC converter
R3
2R2
R1
1R0
U1
8
PGND
7
BG
6
VREG
5
VIN
SC1210
C3
C2
1uF
1uF
1
High Speed, 12 V, Synchronous
Power MOSFET Driver
processor power supplies
TM
processor power supplies
TM
and K8
TM
Q1
C4
10uF
L1
1
2
R2
Q2
1R0
C5
C6
2.2nF
www.semtech.com
s
Vout

sc1210str Summary of contents

  • Page 1

    POWER MANAGEMENT Description 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 ...

  • Page 2

    POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied ...

  • Page 3

    POWER MANAGEMENT Electrical Characteristics (Cont.) Unless specified 25° 12V REG ...

  • Page 4

    POWER MANAGEMENT Timing Diagrams CO DRN PDL_BG Rising Edge Transition 2003 Semtech Corp PDH_TG R_TG 1.4V F_BG 4 SC1210 1. PDL_TG F_TG t t PDH_BG R_BG Falling Edge Transition www.semtech.com ...

  • Page 5

    POWER MANAGEMENT Pin Configuration Top View DRN BST (SO-8) Pin Descriptions ...

  • Page 6

    POWER MANAGEMENT Block Diagram VIN CO PGND 2003 Semtech Corp. LDO UVLO CONTROL & OVERLAP PROT ECTION CIRCUIT 6 SC1210 VREG BST TG DRN BG www.semtech.com ...

  • Page 7

    POWER MANAGEMENT Applications Information THEOR THEOR THEORY OF OPERA Y OF OPERATION Y OF OPERA Y OF OPERA TION TION TION THEOR THEOR Y OF OPERA TION The SC1210 is a high speed, dual output driver designed to drive top ...

  • Page 8

    POWER MANAGEMENT Applications Information (Cont.) the Phase Node during the top FET turn-off due to para- sitic inductance in the switching loop. The spike could be minimized with a careful PCB layout. In those applica- tions with TO-220 package FETs, ...

  • Page 9

    ... POWER MANAGEMENT Outline Drawing - Power SOIC-8 Outline Drawing - SOIC-8 Land Pattern - SOIC-8 Contact Information 2003 Semtech Corp. Semtech Corporation Power Management Products Division 200 Flynn Rd., Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804 9 SC1210 www.semtech.com ...