SC195F Datasheet, PDF (1/18 Pages) Semtech Corporation – 3.5MHz, 500mA Synchronous Step Down DC-DC Regulator

POWER MANAGEMENT
Features
„„ Input Voltage — 2.9V to 5.5V
„„ Output Voltage — 0.8V to 3.3V
„„ Output current capability — 500mA
„„ Efficiency up to 94%
„„ 15 Programmable output voltages
„„ Fast transient response
„„ Oscillator frequency — 3.5MHz
„„ 100% duty cycle capability
„„ Quiescent current — 4.8 mA typ
„„ Shutdown Current — 0.1µA typ
„„ Internal soft-start
„„ Over-voltage protection
„„ Current limit and short circuit protection
„„ Over-temperature protection
„„ Input under-voltage lockout
„„ Floating control pin protection
„„ MLPQ-UT8 1.5 x 1.5 x 0.6 (mm) package
„„ Pb free, halogen free, and RoHS/WEEE compliant
Applications
„„ Smart phones and cellular phones
„„ MP3/Personal media players
„„ Personal navigation devices
„„ Digital cameras
„„ Single Li-ion cell or 3 NiMH/NiCd cell devices
„„ Devices with 3.3V or 5V internal power rails
SC195F
3.5MHz, 500mA Synchronous
Step Down DC-DC Regulator
Description
The SC195F is a high efficiency, 500mA step down regula-
tor designed to operate with an input voltage range of
2.9V to 5.5 V. The input voltage range makes it ideal for
battery operated applications with space limitations. The
SC195F operates at a fixed 3.5MHz switching frequency in
normal PWM (Pulse-Width Modulation) mode. The
SC195F also includes fifteen programmable output
voltage settings that can be selected using the four
control pins, eliminating the need for external feedback
resistors. The output voltage can be fixed to a single
setting or dynamically switched between different levels.
Pulling all four control pins low disables the output.
The SC195F provides several protection features to safe-
guard the device under stressed conditions. These
include short circuit protection, over-temperature protec-
tion, input under-voltage lockout, and soft-start to control
in-rush current. These features, coupled with the small
1.5 x 1.5 x 0.6 (mm) package make the SC195F a versatile
device ideal for step-down regulation in products needing
high efficiency and a small PCB footprint.
Typical Application Circuit
V_IN
2.9V to 5.5V
C_IN
4.7µF
SC195F
IN
LX
OUT
L_X
1.0µH
Control Logic
Lines
Rev 2.0
CTL3
CTL2
CTL1
CTL0
GND
© 2016 Semtech Corporation
V_OUT
0.8V to 3.3V
C_OUT
10µF
1