FSP3112 Datasheet, PDF (1/10 Pages) FOSLINK SEMICONDUCTOR CO.,LTD – DUAL CHANNEL1.5 MHZ, 600MA SYNCHRONOUS STEP-DOWN CONVERTER

DUAL CHANNEL1.5 MHZ, 600MA SYNCHRONOUS STEP-DOWN CONVERTER
„ FEATURES
z High Efficiency : Up to 96%
z 1.5MHz Constant Frequency Operation
z 600mA Output Current at V_IN=3.0V
z Very Low Quiescent Current of 500µA
z No Schottky Diode Required
z Low R_DS(ON) Internal Switches: 0.35Ω
z 0.6V reference allows low Output Voltage
z Current Mode Operation for excellent line and
load transient Response
z Short-Circuit &Thermal Fault Protection
z ＜1µA Shutdown Current
z Power-on Reset Output
z Externally Synchronized Oscillator
z Small Thermally Enhanced MSOP10 and DFN10
Packages
„ APPLICATIONS
z Portable Media Players
z Digital Still Cameras
z Cellular Telephones
z PDAs
z Wireless and DSL modems
„ PIN CONFIGURATION
(Top View)
FSP3112
„ GENERAL DESCRIPTION
The FSP3112 is a dual channel high efficiency
monolithic synchronous step down current mode
DC-DC converter operating at 1.5MHz constant
frequency. The device integrates a main switch and a
synchronous rectifier for high efficiency without an
external Schottky diode for each of the channels. The
FSP3112 can operate from a 2.5V to 5.5V input voltage
and is ideal for powering portable equipment that runs
from a single cell lithium-Ion (Li+) battery. It can supply
600mA output current for each channel and can also
run at 100% duty cycle for low dropout operation,
extending battery life in portable system. For FSP3112,
Pulse Skipping Mode operation at light loads provides
very low output ripple voltage for noise sensitive
applications.
(Top View)
VFB1 1
RUN1 2
VIN 3
SW1 4
GND 5
11
EXPOSED PAD
10 VFB2
9 RUN2
8 POR
7 SW2
6 NC
VFB1 1
RUN1 2
VIN 3
SW1 4
GND 5
11
EXPOSED PAD
10 VFB2
9 RUN2
8 POR
7 SW2
6 NC
10-Lead (3mm ×3mm) Plastic DFN
Exposed Pad is PGND (Pin 11)
Must be connected to GND.
10-Lead Plastic MSOP
Exposed Pad is PGND (Pin 11)
Must be connected to GND.
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2007-7-11