TPS54427_16 Datasheet, PDF (1/30 Pages) Texas Instruments – 4.5-V to 18-V Input, 4-A Output Single Synchronous Step-Down Switcher

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TPS54427
SLVSB43C – NOVEMBER 2011 – REVISED FEBRUARY 2016
TPS54427 4.5-V to 18-V Input, 4-A Output Single Synchronous Step-Down Switcher With
Integrated FET
1 Features
•1 D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide V_IN Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76 V to 7.0 V
• Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 70 mΩ (High Side) and 53 mΩ (Low Side)
• High Efficiency, Less Than 10 μA at Shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 650-kHz Switching Frequency (f_SW)
• Cycle by Cycle Over Current Limit
2 Applications
• Wide Range of Applications for Low Voltage
System
– Digital TV Power Supply
– High Definition Blu-ray Disc™ Players
– Networking Home Terminal
– Digital Set Top Box (STB)
Simplified Schematic
3 Description
The TPS54427 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54427
enables system designers to complete the suite of
various end equipment’s power bus regulators with a
cost effective, low component count, low standby
current solution.
The main control loop for the TPS54427 uses the D-
CAP2™ mode control which provides a fast transient
response with no external compensation
components.
The TPS54427 also has a proprietary circuit that
enables the device to adopt to both low equivalent
series resistance (ESR) output capacitors, such as
POSCAP or SP-CAP, and ultra-low ESR ceramic
capacitors.
The device operates from 4.5-V to 18-V VIN input.
The output voltage can be programmed between
0.76 V and 7 V.
The device also features an adjustable soft start time.
The TPS54427 is available in the 8-pin DDA package
and 10-pin DRC, and is designed to operate from
–40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54427
SO PowerPAD™ (8) 4.89 mm × 3.90 mm
VSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
TPS54427 Transient Response
TPA54427DDA
V_out (50 mV/div)
I_out (2 A/div)
100 µs/div
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.