Texas Instruments TPS40200, User Manual

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1 Description
1.1 Features
1.2 Applications
2 TPS40200EVM-001 Electrical and Performance Specifications
Description
TPS40200EVM-001 is designed to operate with an 8-V to 16-V input and to produce a regulated 3.3-V
output with a load current from 0.125 A to 2.5 A. The TPS40200EVM-001 demonstrates the use of the
TPS40200 in a typical buck converter application. The board sacrifices some packing density to provide
ample test points for module evaluation. This EVM can be modified to support output voltages from 0.7 V
to 5 V by changing a single feedback resistor. The TPS40200EVM-001 has been built to the sample
application as described in the Application Information section of the TPS40200 data sheet (
SLUS659 ).
•
8-V to 16-V input range
•
3.3-V output, adjustable with single feedback resistor
•
0.125-A to 2.5-A steady-state output current
•
300-kHz switching frequency
•
Single P-channel MOSFET and single rectifier
•
Two-layer, 1.4-inch
×
2.12-inch, surface-mount design with all components on one side
•
Convenient test points for probing critical waveforms and noninvasive loop response testing
•
Nonisolated medium-current, point-of-load and low-voltage bus converters
•
Scanners
•
Industrial controls
•
Distributed power systems
•
DSL/cable modems
PARAMETER TEXT CONDITIONS MIN NOM MAX UNIT
V
IN
Input voltage 8 12 16 V
V
OUT
Output voltage IOUT at 2.5 A, R6 = 26.7 k
Ω
3.200 3.3 3.400
(1)
V
Line regulation
±
0.2% Vout 3.293 3.3 3.307 V
Load regulation
±
0.2% Vout 3.293 3.3 3.307 V
V
OUT
Output voltage IOUT at 2.5 A, R6 = 16.5 k
Ω
4.85 5 5.150
(1)
V
Line regulation
±
0.2% Vout 4.990 5 5.010 V
Load regulation
±
0.2% Vout 4.990 5 5.010 V
V
RIPPLE
Output ripple voltage At maximum output current 60 mV
V
OVER
Output overshoot For 2.375-A load transient 60 mV
V
UNDER
Output undershoot For 2.375-A load transient 60 mV
I
OUT
Output current 0.125 2.5 A
I
SCP
Short-circuit current trip point Imax +50% minimum 3.75 5 A
Efficiency At nominal input voltage and maximum output 90%
current
F
S
Switching frequency 300 kHz
(1)
Set-point accuracy depends on external resistor tolerance and the reference voltage. Line and load regulation values are
referenced to the nominal design output voltage.
Using the TPS40200 2 SLVU147A – February 2006 – Revised March 2006
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