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TPS54357 Datasheet

  • TPS54357

  • TPS54352/3/4/5/6/7：4.5V 至 20V 输入、3A 输出的同步 PWM 转换...

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  • TI

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6,4 mm
y
5,0 mm
www.ti.com
TPS54352, TPS54353
TPS54354, TPS54355
TPS54356, TPS54357
SLVS519 鈭?MAY 2004
4.5 V TO 20 V INPUT, 3 A OUTPUT SYNCHRONOUS PWM
SWITCHER WITH INTEGRATED FET (SWIFT铮?
FEATURES
D
100 m鈩? 4.5-A Peak MOSFET Switch for High
D
D
D
D
D
D
D
D
D
D
Efficiency at 3-A Continuous Output Current
Uses External Lowside MOSFET or Diode
Fixed Output Versions 鈭?/div>
1.2V/1.5V/1.8V/2.5V/3.3V/5.0V
Internally Compensated for Low Parts Count
Synchronizes to External Clock
1805 Out of Phase Synchronization
Wide PWM Frequency 鈭?Fixed 250 kHz,
500 kHz or Adjustable 250 kHz to 700 kHz
Internal Slow Start
Load Protected by Peak Current Limit and
Thermal Shutdown
Adjustable Undervoltage Lockout
16-Pin TSSOP PowerPADE Package
DESCRIPTION
The TPS5435x is a medium output current synchronous
buck PWM converter with an integrated high side
MOSFET and a gate driver for an optional low side
external MOSFET. Features include a high performance
voltage error amplifier that enables maximum
performance under transient conditions. The TPS5435x
has an under-voltage-lockout circuit to prevent start-up
until the input voltage reaches a preset value; an internal
slow-start circuit to limit in-rush currents; and a power good
output to indicate valid output conditions. The
synchronization feature is configurable as either an input
or an output for easy 180掳 out of phase synchronization.
The TPS5435x devices are available in a thermally
enhanced 16-pin TSSOP (PWP) PowerPAD铮?package.
TI provides evaluation modules and the SWIFT铮?Designer
software tool to aid in quickly achieving high-performance
power supply designs to meet aggressive equipment
development cycles.
EFFICIENCY
vs
OUTPUT CURRENT
100
95
90
Efficiency 鈭?%
85
80
75
70
65
60
VI= 12 V
VO= 3.3 V
fs = 500 kHz
0
1
2
3
4
VI = 6 V
VI = 12 V
APPLICATIONS
D
Industrial & Commercial Low Power Systems
D
LCD Monitors and TVs
D
Computer Peripherals
D
Point of Load Regulation for High
Performance DSPs, FPGAs, ASICs and
Microprocessors
SIMPLIFIED SCHEMATIC
Input
Voltage
VIN
TPS54356
SYNC
PWRGD
ENA
BIAS
BOOT
PH
LSG
PGND
VSENSE
PWRPAD
55
50
IO 鈭?Output Current 鈭?A
Output
Voltage
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
铮?/div>
2004, Texas Instruments Incorporated

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