TPS40200-Q1 Datasheet, PDF (1/41 Pages) Texas Instruments – WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER

TPS40200-Q1
www.ti.com
SLUS739D – SEPTEMBER 2006 – REVISED JULY 2011
WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER
Check for Samples: TPS40200-Q1
FEATURES
1
• 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
APPLICATIONS
• Automotive Controls
• Distributed Power Systems
• DSL/Cable Modems
• Scanners
• Telecom
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
TYPICAL APPLICATION
V_IN
R5
C3
C4
R3 ^C5
TPS40200
1 RC VDD 8
2 SS ISNS 7
3 COMP GDRV 6
4 FB
R4 _{R1 R2}
GND 5
C6
C1
R_SENSE
Q1 L1
V_OUT
C2
D1
Figure 1. 12-V to 5-V Buck Converter
With 94% Efficiency
100
90
80
V =8V
IN
V = 12 V
IN
V = 16 V
IN
70
60
V_OUT = 5 V
50
0
0.5
1
1.5
2
2.5
3
Load Current - A
Figure 2. Typical Efficiency of Application Circuit 1
(Described in Application 1)
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