SC3102 Datasheet, PDF (1/17 Pages) Semtech Corporation – 2A Synchronous Step-Down Regulator

POWER MANAGEMENT
Features
„ V_IN Range: 2.9 – 5.5V
„ Preset V_OUT Range: 1.0V to 3.3V
„ Up to 2A Output Current
„ Ultra-Small Footprint, <1mm Height
„ 1.5MHz Switching Frequency
„ Selectable Forced PSAVE or Forced PWM Operation
„ Efficiency Up to 95%
„ Low Output Noise Across Load Range
„ Excellent Transient Response
„ Start Up into Pre-Bias Output
„ 100% Duty-Cycle Low Dropout Operation
„ <1μA Shutdown Current
„ Externally Programmable Soft-Start Time
„ Power Good indicator
„ Input Under-Voltage Lockout
„ Output Over-Voltage, Current Limit Protection
„ Over-Temperature Protection
„ 3mm x 3mm x 0.6mm thermally enhanced
MLPQ-UT16 package
„ -40 to +85°C Temperature Range
„ Pb-free, Halogen free, and RoHS/WEEE compliant
Applications
„ Office Automation
„ Switches and Routers
„ Network Cards
„ LCD TV
SC3102
2A Synchronous
Step-Down Regulator
Description
The SC3102 is a 2A synchronous step-down regulator
designed to operate with an input voltage range of 2.9V
to 5.5V. The device requires minimal external components
for a complete step down regulator solution. The output
voltage is factory predetermined with an available range
of 1.0V to 3.3V.
The SC3102 is optimized for maximum efficiency over a
wide range of load currents. During full load operation,
the SC3102 operates in forced PWM mode with a fixed
1.5MHz oscillator frequency, allowing the use of small
surface mount external components. As the load
decreases, the regulator has the option to transition, via
the MODE pin, into forced Power Save mode to maximize
efficiency or to stay in forced PWM mode.
The SC3102 offers output short circuit and thermal
protection to safe guard the device under extreme
operating conditions. The enable pin provides on/off
control of the regulator. When connected to logic
low, the device enters shutdown and consumes less
than 1μA of current. Other protection features include
programmable soft-start with Power Good indicator, over
voltage protection and under voltage lockout.
The SC3102 is available in a thermally-enhanced, 3mm
x 3mm x 0.6mm MLPQ-UT16 package and has a rated
temperature range of -40 to +85°C.
Typical Application Circuit
V_IN
C_IN
10μF
1Ohm
0.1μF
PVIN
LX
AVIN VOUT
SC3102
PGOOD
EN
MODE PGND
SS
AGND
C_SS
L 1.5μH
V_OUT
C_OUT
47μF
Rev 2.2
© Semtech Corporation
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