SC1205CS Datasheet, PDF (1/12 Pages) Samtec, Inc – High Speed Synchronous Power MOSFET Driver

SC1205
High Speed Synchronous
Power MOSFET Driver
POWER MANAGEMENT
Description
The SC1205 is a cost effective Dual MOSFET Driver de-
signed for switching High and Low side Power MOSFETs.
Each driver is capable of driving a 3000pF load in 20ns
max rise/fall time and has a 20ns max propagation de-
lay from input transition to the gate of the power FET’s.
An internal Overlap Protection circuit prevents shoot-
through from Vin to GND in the main and synchronous
MOSFET’s. The Adaptive Overlap Protection circuit en-
sures the Bottom FET does not turn on until the Top FET
source has reached a voltage low enough to prevent
cross-conduction.
The high current drive capability (3A peak) allows fast
switching, thus reducing switching losses at high (up to
1MHz) frequencies without overheating the driver. The
high voltage CMOS process allows operation from 5-25
Volts at top MOSFET drain, thus making SC1205 suit-
able for battery powered applications. Connecting En-
able pin (EN) to logic low shuts down both drives and
reduces operating current to less than 10uA.
An Under-Voltage-Lock-Out circuit is included to guaran-
tee that both driver outputs are low when the 5V logic
level is less than or equal to 4.4V (typ) at supply ramp up
(4.35V at supply ramp down). An Internal temperature
sensor shuts down all drives in the event of
overtemperature. SC1205 is fabricated utilizing Bi-CMOS
technology for low quiescent current. The SC1205 is of-
fered in a standard SO-8 package.
Features
‹ Fast rise and fall times (15ns typical with 3000pf
load)
‹ 3 Amp peak drive current
‹ 14ns max Propagation delay (BG going low)
‹ Adaptive Non-overlapping Gate Drives provide
shoot-through protection
‹ Floating top drive switches up to 25V
‹ Under-Voltage lock-out
‹ Overtemperature protection
‹ Less than 10µA supply current when EN is low
‹ Low cost
Applications
‹ High Density sunchronous power supplies
‹ Motor Drives/Class-D amps/Half bridge drivers
‹ High frequency (to 1.2 MHz) operation allows use
of small inductors and low cost caps in place of
electrolytics
‹ High efficiency portable computers
‹ Battery powered applications
Typical Application Circuit
Vin 5-12V
2200uf
2. 5m
10nf
10
10u,CER
Rf
Ri
1 _VID4
2 _VID3
3 _VID2
4 _VID1
5 _VID0
6 _ERROUT
7 _FB
8 _RREF
VCC ¹⁶
BGOUT ¹⁵
OC+ ¹⁴
OUT1 ¹³
OUT2 ¹²
OC- ¹¹
UVLO ¹⁰
GND ⁹
Rref
S C2 422A
+5V
TG
VS
DRN
EN
BG
CO
SC1205
70N03
70N03
TG
VS
DRN
EN
BG
CO
SC1205
70N03
70N03
Vcore, 1.7v,40A
Revision: September 22, 2004
1
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