TPS40200-Q1,TPS40200QDRQ1

Part No.:
TPS40200-Q1,TPS40200QDRQ1
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Description:
WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
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616 K
Page:
41 Pages
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TI [ TEXAS INSTRUMENTS ]
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PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
TPS40200-Q1
www.ti.com
SLUS739D
SEPTEMBER 2006
REVISED JULY 2011
WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
Check for Samples:
TPS40200-Q1
1
FEATURES
Qualified for Automotive Applications
Input Voltage Range 4.5 V to 52 V
Output Voltage (700 mV to 90% V
IN
)
200-mA Internal P-FET Driver
Voltage Feed-Forward Compensation
Undervoltage Lockout (UVLO)
Programmable Fixed-Frequency
(35-kHz to 500-kHz) Operation
Programmable Short-Circuit Protection
Hiccup Overcurrent Fault Recovery
Programmable Closed Loop Soft Start
700-mV 1% Reference Voltage
External Synchronization
Small 8-Pin SOIC (D) Package
DESCRIPTION
The TPS40200 is a flexible nonsynchronous
controller with a built-in 200-mA driver for P-channel
FETs. The circuit operates with inputs up to 52 V,
with a power-saving feature that turns off driver
current once the external FET has been fully turned
on. This feature extends the flexibility of the device,
allowing it to operate with an input voltage up to 52 V
without dissipating excessive power. The circuit
operates with voltage-mode feedback and has
feed-forward
input-voltage
compensation
that
responds instantly to input voltage change. The
integral 700-mV reference is trimmed to 2%,
providing the means to accurately control low
voltages. The TPS40200 is available in an 8-pin
SOIC and supports many of the features of more
complex controllers. Clock frequency, soft start, and
overcurrent limit are each easily programmed by a
single, external component. The part has
undervoltage lockout (UVLO) and can be easily
synchronized to other controllers or a system clock to
satisfy
sequencing
and/or
noise-reduction
requirements.
Major sections in this data sheet include:
Specifications
General Information
Example Applications
Design References
APPLICATIONS
Automotive Controls
Distributed Power Systems
DSL/Cable Modems
Scanners
Telecom
TYPICAL APPLICATION
V
IN
R5
100
V
IN
= 8 V
V
IN
= 12 V
V
IN
= 16 V
C1
C3
TPS40200
1 RC
VDD 8
90
Efficiency - %
C4
2 SS
R3
C5
3 COMP GDRV 6
ISNS 7
R
SENSE
80
70
Q1 L1
C2
D1
V
OUT
4 FB
R4
R1
R2
GND 5
60
V
OUT
= 5 V
50
0
0.5
1
1.5
2
Load Current - A
2.5
3
C6
Figure 1. 12-V to 5-V Buck Converter
With 94% Efficiency
1
Figure 2. Typical Efficiency of Application Circuit 1
(Described in
Application 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.
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.
Copyright
©
2006–2011, Texas Instruments Incorporated