
1
FEATURES
PH
VIN
PGND
BOOT
VSENSE
PWRPAD
BIAS
ENA
PWRGD
Input
Voltage
Output
Voltage
LSG
TPS54356
SYNC
APPLICATIONS
50
55
60
65
70
75
80
85
90
95
100
0
1
2
3
4
VI= 12 V
VO= 3.3 V
fs = 500 kHz
VI = 12 V
VI = 6 V
IO Output Current A
Efficiency
%
EFFICIENCY
vs
OUTPUT CURRENT
SUPPORTS DEFENSE, AEROSPACE,
www.ti.com ....................................................................................................................................................... SLVS684A – JANUARY 2007 – REVISED JULY 2009
4.5-V TO 20-V INPUT, 3-A OUTPUT SYNCHRONOUS PWM SWITCHES
WITH INTEGRATED FET (SWIFT)
SIMPLIFIED SCHEMATIC
2
100-m, 4.5-A Peak MOSFET Switch for High
Efficiency at 3-A Continuous Output Current
Use External Low-Side MOSFET or Diode
Fixed-Output Versions – 1.2 V/1.5 V/1.8 V/
2.5 V/3.3 V/5 V
Internally Compensated for Low Parts Count
Synchronize to External Clock
180° Out-of-Phase Synchronization
Wide Pulse Width Modulation (PWM)
Frequency – 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 PowerPAD Thin Shrink Small-Outline
Package (TSSOP) (PWP)
Industrial and Commercial Low-Power
Systems
LCD Monitors and TVs
Computer Peripherals
Point-of-Load Regulation for High
Performance DSPs, FPGAs, ASICs, and
Microprocessors
AND MEDICAL APPLICATIONS
Controlled Baseline
One Assembly/Test Site
One Fabrication Site
Available in Military (–55°C/125°C)
Temperature Range(1)
Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
(1)
Additional temperature ranges are available - contact factory
1
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.
2
SWIFT, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright 2007–2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.