SGM6232 Datasheet, PDF (1/14 Pages) SG Micro Corp – 1.4MHz Step-Down Converter

SGM6232
2A, 38V, 1.4MHz Step-Down Converter
GENERAL DESCRIPTION
FEATURES
The SGM6232 is a current-mode step-down regulator
with an internal power MOSFET. This device achieves
2A continuous output current over a wide input supply
range from 4.5V to 38V with excellent load and line
regulations. The switching frequency of SGM6232 is
1.4MHz and current mode operation provides fast
transient response and eases loop stabilization.
The SGM6232 is highly efficient with peak efficiency at
91% when in operation. In shutdown mode the regulator
draws less than 18µA of supply current. Protection
features include cycle-by-cycle current limit and thermal
shutdown. The device also includes an internal soft-start
and an external adjustable soft-start function to limit the
inrush current and prevent the overshoot of output
voltage.
The SGM6232 is available in Green SOIC-8 (Exposed
Pad) package and requires a minimum number of readily
available external components to complete a 2A step-
down DC/DC converter solution.
TYPICAL APPLICATION
● 2A Output Current
● High Efficiency: Up to 91%
● 4.5V to 38V Input Voltage Range
● < 18µA Shutdown Supply Current
● 100mΩ Internal Power MOSFET Switch
● Fixed 1.4MHz Switching Frequency
● Output Adjustable from 0.8V to 28V
● Cycle-by-Cycle Current Limit Protection
● Thermal Shutdown Protection
● Under-Voltage Lockout
● Stable with Low ESR Ceramic Capacitors
● -40℃ to +85℃ Operating Temperature Range
● Available in Green SOIC-8 (Exposed Pad) Package
APPLICATIONS
Distributed Power Systems
Battery Chargers
Flat Panel TVs
Set-Top Boxes
Pre-Regulator for Linear Regulators
Cigarette Lighter Powered Devices
DVD/PVR Devices
INPUT
4.5V to 38V
ENABLE
CIN
22μF
R4
C5
10Ω or shorted 10nF
IN
EN
BS
SW
SGM6232
SS
GND
FB
COMP
C4
0.1μF
C6
Optional
C3
5.6nF
R3
10kΩ
L
4.7μH
R1
33kΩ
D1
B340A
R2
10.5kΩ
OUTPUT
3.3V/2A
COUT
47μF
100
V_OUT = 5.0V
90
80
V_OUT = 3.3V
70
60
50
40
V_IN = 12V
30
0 0.5 1 1.5 2 2.5 3 3.5
Load Current (A)
SG Micro Corp
www.sg-micro.com
REV. A. 1