TPS54202 Datasheet, PDF (1/26 Pages) Texas Instruments – 4.5-V to 28-V Input, 2-A Output, EMI Friendly Synchronous Step Down Converter

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS54202 4.5-V to 28-V Input, 2-A Output, EMI Friendly
Synchronous Step Down Converter
TPS54202
SLVSD26 – APRIL 2016
1 Features
•1 4.5-V to 28-V Wide Input voltage Range
• Integrated 148-mΩ and 78-mΩ MOSFETs for 2-A,
Continuous Output Current
• Low 2-μA Shutdown, 45-μA Quiescent Current
• Internal 5-mS Soft-Start
• Fixed 500 kHz Switching Frequency
• Frequency Spread Spectrum to Reduce EMI
• Advanced Eco-mode™ Pulse Skip
• Peak Current Mode Control
• Internal loop compensation
• Overcurrent Protection for Both MOSFETs with
Hiccup Mode Protection
• Over Voltage Protection
• Thermal Shutdown
• SOT23-6 Package
2 Applications
• 12-V, 24-V Distributed Power-Bus Supply
• Industry Application
– White Goods
• Consumer Application
– Audio
– STB, DTV
– Printer
Simplified Schematic
TPS54202
3
6
VIN
VIN
BOOT
Cin
1
GND
2
SW
Cboot
Lo
VOUT
5
EN EN
4
FB
Rfb1
Co
Rfb2
3 Description
The TPS54202 is a 4.5 V to 28 V input voltage range,
2-A synchronous buck converter. The device includes
two integrated switching FETs, internal loop
compensation and 5 ms internal soft start to reduce
component count.
By integrating the MOSFETs and employing the
SOT23 package, TPS4202 achieves the high power
density and offers small footprint on PCB.
Advanced Eco-mode implementation maximizes the
light load efficiency and reduces the power loss.
In TPS54202, the frequency spread spectrum
operation is introduced for EMI reduction.
Cycle by cycle current limit in both high-side
MOSFET protects the converter in over load condition
and is enhanced by a low-side MOSFET freewheeling
current limit which prevents current runaway. Hiccup
mode protection will be triggered if the over current
condition has persisted for longer than the present
time.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54202
SOT23(6)
1.60 mm × 2.90 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Outout Current
100
90
80
70
60
50
40
30
20
10
0
0.001
V_IN = 12 V, V_OUT = 5 V
V_IN = 12 V, V_OUT = 3.3 V
V_IN = 24 V, V_OUT = 5 V
V_IN = 24 V, V_OUT = 3.3 V
0.01
0.1
Output Current (A)
1
D100
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.