SN0401093 Datasheet, PDF (1/13 Pages) Texas Instruments – DUAL INPUT BUS 9-A OUTPUT SYNCHRONOUS BUCK PWM SWITCHER WITH INTEGRATED FETs(SWIFT)

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Typical Size
6,4 mm X 9,7 mm
SN0401093
SLVS523− OCTOBER 2004
DUAL INPUT BUS 9ĆA OUTPUT SYNCHRONOUS BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT)
FEATURES
D Low Voltage Separate Power Bus
D 15-mΩ MOSFET Switches for High Efficiency
at 9-A Continuous Output
D Adjustable Output Voltage
D Externally Compensated With 1% Internal
Reference Accuracy
D Fast Transient Response
D Wide PWM Frequency:
Adjustable 280 kHz to 700 kHz
D Load Protected at Thermal Shutdown
D Integrated Solution Reduces Board Area and
Total Cost
APPLICATIONS
D Low-Voltage, High-Density Systems With
Power Distribution at 1.0 V
D Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs and
Microprocessors
D Broadband, Networking and Optical
Communications Infrastructure
DESCRIPTION
As a member of the SWIFT family of dc/dc regulators,
the SN0401093 low-input voltage high-output current
synchronous buck PWM converter integrates all
required active components. Included on the substrate
with the listed features are a true, high performance,
voltage error amplifier that enables maximum
performance under transient conditions and flexibility in
choosing the output filter L and C components; an
under-voltage-lockout circuit to prevent start-up until
the VIN input voltage reaches 3 V; an internally and
externally set slow-start circuit to limit in-rush currents;
and a power good output useful for processor/logic
reset, fault signaling, and supply sequencing.
The SN0401093 is available in a thermally enhanced
28-pin TSSOP (PWP) PowerPAD package, which
eliminates bulky heatsinks.
SIMPLIFIED SCHEMATIC
Input1
Input2
SIMPLIFIED SCHEMATIC
PVIN
PH
SN0401093
BOOT
3.3 V
VIN
PGND
COMP
VBIAS
AGND ^VSENSE
Output
Compensation
Network
EFFICIENCY
vs
OUTPUT CURRENT
100
95
90
85
80
75
70
65
VIN = 3.3 V,
60
PVIN = 2.5 V,
VO = 1.8 V,
55
fs= 700 kHz
50
0 1 2 3 4 5 6 7 8 9 10
IO − Output Current − A
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD and SWIFT are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright  2004, Texas Instruments Incorporated