TPS54425 SLVSA84C –AUGUST 2010–REVISED JULY 2011 4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT™)

TPS54425
SLVSA84C –AUGUST 2010–REVISED JULY 2011
4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER
WITH INTEGRATED FET ( SWIFT™)

1FEATURES
23• D-CAP2™ Mode Enables Fast Transient
Response
• Low Output Ripple and Allows Ceramic Output
Capacitor
• Wide VIN Input Voltage Range: 4.5 V to 18 V
• Output Voltage Range: 0.76 V to 5.5 V
• Highly Efficient Integrated FET’s Optimized
for Lower Duty Cycle Applications
– 65 mΩ (High Side) and 55 mΩ (Low Side)
• High Efficiency, less than 10 μA at shutdown
• High Initial Bandgap Reference Accuracy
• Adjustable Soft Start
• Pre-Biased Soft Start
• 700-kHz Switching Frequency (fSW)
• Cycle By Cycle Over Current Limit
• Power Good Output
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)

DESCRIPTION
The TPS54425 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54425
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
TPS54425 uses the D-CAP2™ mode control which
provides a very fast transient response with no
external compensation components. The TPS54425
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 5.5 V. The device also features an adjustable
soft start time and a power good function. The
TPS54425 is available in the 14-pin HTSSOP
package, and designed to operate from –40°C to
85°C.

Click here to download Texas Instruments TI pdf datasheet TPS54425 SLVSA84C –AUGUST 2010–REVISED JULY 2011 4-A OUTPUT SINGLE SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFT™)

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