Features: Operating Input Voltage 8 V to 40 V
Input Voltage Feed-Forward Compensation
< 1 % Internal 0.7-V Reference
Programmable Fixed-Frequency Up to 1 MHz Voltage Mode Controller
Internal Gate Drive Outputs for High-Side and Synchronous N-Channel MOSFETs
16-Pin PowerPAD Package (JC = 2°C/W)
Thermal Shutdown
Externally Synchronizable
Programmable High-Side Current Limit
Programmable Closed-Loop Soft-Start
TPS40054 Source Only
TPS40055 Source/Sink
TPS40057 Source/Sink With V Prebias
OUT
ApplicationPower Modules
Networking/Telecom
Industrial
ServersPinout
Specifications
| |
TPS40054
TPS40055
TPS40057 |
UNIT |
Input voltage range, VIN
|
VIN |
45 |
V |
| VFB, SS, SYNC |
-0.3 to 6 |
| SW |
-0.3 to 45 |
| SW, transient < 50 ns |
-2.5 |
KFF, with IIN(max) = -5 mA
|
-0.3 to 11 |
| Output voltage range, VOUT |
COMP, RT, SS |
-0.3 to 6 |
| Input current, IIN |
KFF |
5
|
mA |
| Output current, IOUT |
RT |
200 |
A
|
| Operating junction temperature range, TJ |
|
-40 to 125 |
|
| Storage temperature, Tstg |
|
-55 to 150 |
| Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds |
|
260 |
Description The TPS4005x is a family of high-voltage, wide input (8 V to 40 V), synchronous, step-down converters. The TPS4005x family offers design flexibility with a variety of user programmable functions, including soft-start, UVLO, operating frequency, voltage feed- forward, high-side current limit, and loop compensation.
The TPS4005x are also synchronizable to an external supply. They incorporate MOSFET gate drivers for external N-channel high-side and
synchronous rectifier (SR) MOSFETs. Gate drive logic incorporates anti-cross conduction circuitry to prevent simultaneous high-side and synchronous rectifier conduction.
The TPS4005x uses voltage feed-forward control techniques to provide good line regulation over the wide (4:1) input voltage range, and fast response to input line transients with near constant gain with input variation which eases loop compensation. The externally programmable current limit provides pulse-by-pulse current limit, as well as hiccup mode operation utilizing an internal fault counter for longer duration overloads.
TPS40054 Data Sheet
