TPS54340,TPS54340DDA,TPS54340DDAR

Part No.:
TPS54340,TPS54340DDA,TPS54340DDAR
Download:
Download
Description:
42 V Input, 3.5 A, Step Down DC-DC Converter with Eco-mode
File Size:
1949 K
Page:
43 Pages
Logo:
Maker:
TI [ TEXAS INSTRUMENTS ]
PCB Prototype

July 19, 2018:

TPS54980PWPR

TPS62060DSGR

TPS79425DGNR

TS4990JT

TSH10I

TSP190B

U1AFS250-FG256I

UA7818Y

UA79MXX

UB16KKG03N-B

V23818-K305-B57

V24A24C200B

PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
TPS54340
www.ti.com
SLVSBK0A – OCTOBER 2012 – REVISED FEBRUARY 2013
42 V Input, 3.5 A, Step Down DC-DC Converter with Eco-mode™
Check for Samples:
TPS54340
1
FEATURES
4.5 V to 42 V (45 V Abs Max) Input Range
3.5 A Continuous Current, 4.5 A Minimum Peak
Inductor Current Limit
Current Mode Control DC-DC Converter
92-mΩ High-Side MOSFET
High Efficiency at Light Loads with Pulse
Skipping Eco-mode™
Low Dropout at Light Loads with Integrated
BOOT Recharge FET
146
μA
Operating Quiescent Current
1
μA
Shutdown Current
100 kHz to 2.5 MHz Fixed Switching Frequency
Synchronizes to External Clock
Adjustable UVLO Voltage and Hysteresis
Internal Soft-Start
Accurate Cycle-by-Cycle Current Limit
Thermal, Overvoltage, and Frequency
Foldback Protection
0.8 V 1% Internal Voltage Reference
8-Pin HSOIC with PowerPAD™ Package
–40°C to 150°C T
J
Operating Range
Supported by WEBENCH™ Software Tool
2
APPLICATIONS
12 V, 24 V and 48 V Industrial, Automotive and
Communications Power Systems
DESCRIPTION
The TPS54340 is a 42 V, 3.5 A, step down regulator with an integrated high side MOSFET. The device survives
load dump pulses up to 45 V per ISO 7637. Current mode control provides simple external compensation and
flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146
μA.
Shutdown supply current is reduced to 1
μA
when the enable pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start
up ramp is internally controlled to provide a controlled start up and eliminate overshoot.
A wide switching frequency range allows either efficiency or external component size to be optimized. Frequency
foldback and thermal shutdown protects internal and external components during an overload condition.
The TPS54340 is available in an 8-pin thermally enhanced HSOIC PowerPAD™ package.
SIMPLIFIED SCHEMATIC
100
EFFICIENCY vs LOAD CURRENT
90
80
70
V
IN
VIN
TPS54340
EN
BOOT
V
OUT
RT/CLK
SW
Efficiency - %
60
50
40
30
20
10
0
V
IN
= 12V
fsw
= 600 kHz
R1
COMP
FB
R3
GND
V
OUT
= 3.3V
V
OUT
= 5V
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
I
O
- Output Current - A
1
2
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.
Eco-mode, PowerPAD, WEBENCH are trademarks of Texas Instruments.
Copyright © 2012–2013, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.