SC9301 Datasheet, PDF (1/29 Pages) Semtech Corporation – 10A EcoSpeed® Integrated FET Regulator with 5V LDO and Hiccup Restart

SC9301
POWER MANAGEMENT
10A EcoSpeed^® Integrated FET
Regulator with 5V LDO and Hiccup Restart
Features
Description
„ Power system
• Input voltage — 3V to 28V
• Bias Voltage — 5V LDO or 3V to 5.5V external
• Up to 96% peak efficiency
• Integrated bootstrap switch
• LDO output current — up to 200mA
• Reference tolerance — 1% T = -40 to +125 °C
J
• EcoSpeed^® architecture with pseudo-fixed fre-
quency adaptive on-time control
• Pre-bias start-up
„ Logic input and output control
• Independent enable control for LDO and
switcher
• Programmable V UVLO threshold
• ^IN
Power good output
• Programmable soft-start time
„ All protection: automatic restart on fault
• Over-voltage and under-voltage
• TC compensated R sensed current limit
• ^DS(ON)
Thermal shutdown
„ Smart gate drive reduces EMI
„ Capacitor types: SP, POSCAP, OSCON, and ceramic
„ Package — 5 x 5(mm), 32-pin MLPQ
„ Lead-free and halogen-free
„ RoHS and WEEE compliant
The SC9301 is a stand-alone synchronous EcoSpeed^® buck
regulator with adaptive on-time control architecture. It
features integrated power MOSFETs, a bootstrap switch,
and a fixed 5V LDO in a 5x5mm package. The device is
highly efficient and uses minimal PCB area. The SC9301
supports using standard capacitor types such as electro-
lytic or specialty polymer, in addition to ceramic, at switch-
ing frequencies up to 1MHz.
Additional features include programmable cycle-by-cycle
current limit protection, programmable soft-start, under
and over-voltage protection, automatic fault recovery
(hiccup restart), and soft shutdown. The device also pro-
vides separate enable inputs for the PWM controller and
LDO as well as a power good output for the PWM
controller.
Applications
„ Networking and telecommunication equipment
„ Printers, DSL, and STB applications
„ Point-of-load power supplies and module replacement
Typical Application Circuit
RTON
EN
ENL
TON
VDD
1 μF
CSOFT
SS
VIN
VIN
CIN
SC9301
ILIM
LXS
PGOOD
VOUT
LX
FB
CBST
RILIM
L1
RFB1
RFB2
PGOOD
VOUT
+
COUT
Rev. 2.0
© Semtech Corporation
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