SC2612 Datasheet, PDF (1/12 Pages) Semtech Corporation – 600kHz/200kHz Step-Down DC/DC Converter

POWER MANAGEMENT
Description
The SC2612 is a voltage mode switcher designed for low
cost, “point of use” voltage conversion. SC2612 is avail-
able with fixed switching frequencies of 600kHz
(SC2612A) and 200kHz (SC2612C).
The SC2612 has soft start and enable functions and is
short circuit protected. The output of the switcher may
be set anywhere between 0.8V and 75% of Vin. Short
circuit protection is disabled during start-up to allow the
output capacitors time to fully charge.
SC2612A/C
600kHz/200kHz
Step-Down DC/DC Converter
Features
u Operating frequency of 600kHz or 200kHz
u Input supply of 3V to 8V
u 0.5A Drive current for up to 10A output
u Output voltages down to 0.8V
u Overcurrent protection and soft start
u MSOP-8 package
Applications
u Graphics IC Power supplies
u Embedded, low cost, high efficiency converters
Typical Application Circuit
3.3V IN
R1
C5
C7
C9
R9
12V IN
C10
C1
C2
U2
4 _{VCC BST} 8
1 _{COMP DH} 7 ^R2
2 _{SS/EN DL} 6 ^R3
5 _{GND FB} 3
SC2612
Q2
L1
Q3
C3
1.5V OUT
R6
R10
August 18, 2004
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