TPS40490 Datasheet, PDF (1/38 Pages) Texas Instruments – 5-V to 60-V WIDE-INPUT SYNCHRONOUS PWM BUCK CONTROLLER

TPS40490
www.ti.com
SLVSCB4 – OCTOBER 2013
5-V to 60-V WIDE-INPUT SYNCHRONOUS PWM BUCK CONTROLLER
Check for Samples: TPS40490
FEATURES
1
• Wide-Input Voltage Range from 5 V to 60 V
• 600-mV Reference Voltage With ±1% Accuracy
and External Modulation Capabilities
• Programmable UVLO and Hysteresis
• Voltage Mode Control With Feed Forward and
High Gain Bandwidth Error Amplifier
• 100-kHz to 5.4-MHz Programmable Frequency
• Smart Low and High Side Driver
– Factory Selectable Gate Drive Voltage VDR
With External Drive Capability and UVLO
Protection
– Matched Low and High Side Propagation
Delay
– Programmable Fixed Delay Dead-time
• Low-Side FET Sensing Overcurrent Protection
and High-Side FET Sensing Short-Circuit
Protection
• Programmable Closed Loop Soft-Start
• Supports Pre-Biased Outputs
• Thermal Shutdown at 160°C With Hysteresis
• Power Good Detector
• Integrated Diode for Bootstrap Supply With
UVLO
• 28-Pin 5-mm × 5-mm QFN (RHD) Package
APPLICATIONS
• POL Modules
• Wide Input Voltage, High-Power Density
DC/DC Converters for Industrial, Networking
and Telecomm Equipment
• Notebook and Tablet Computers
• Envelope Tracking Systems
TYPICAL APPLICATION (Non-Isolated 24V-12V Supply)
GND
J1
J2
VIN
R21B
10K
R21A
200K
GND
VIN
R20A
200K
D1
3.3V
R20B
10K
V3p3
C24
4.7μF
GND
V3p3
C25
1.0uF
C21
10000pF
C23
1.0uF
29
C22
VIN
22
0.1μF
23
VDR_EXT 24
25
15K
R26
C26
1nF
C26b
30pF
COMP 26
FB 27
28
C28
68nF
PAD
VIN
VDR
VDR_EXT
V3V
COMP
FB
SS
U1
TPS40490
SW
BOOT
HDRVH
HDRVL
SW
LDRVH
LDRVL
PGND
47nF _R14
C14 0
14
13
R13
12
2.2
R12
11
1.2
10
R10
9
2.2
R9
8
1.2
OUT
C1
1.0μF
GND
C3
1nF
GND
Ci3
2.2μF
Ci4
Ci1
Ci2
2.2μF 2.2μF 2.2μF
VIN
Q1
BSC123N08NS3G
1
2
L1
1μH
R2
DNI
SW
C4
DNI
C27
2200pF
Q2
R27C
130
BSC123N08NS3G
GND
R27PM
0
R27A
20K
FB
OUT
Co7
0.1μF
J3
Co1
Co2 Co3
Co4
Co5
Co6
47uF 47uF 47uF 47uF 47uF 47uF
J4
GND
R27B
1.05K
GND
GND VDR_EXT
C24A
0.1μF
R1
C2
20
NC
D2
220uF BAT43XV2
OUT
J6
JCOMP
1
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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 © 2013, Texas Instruments Incorporated