1 Features
1• D-CAP2™ Mode Control
– Fast Transient Response
– No External Parts Required for Loop
Compensation
– Compatible With Ceramic Output Capacitors
• High Initial Reference Accuracy (±1%)
• Low Output Ripple
• Wide Input Voltage Range: 4.5 V to 24 V
• Output Voltage Range: 0.76 V to 5.5 V
• Low-Side RDS(ON) Loss-Less Current Sensing
• Adaptive Gate Drivers with Integrated Boost Diode
• Adjustable Soft Start
• Non-Sinking Pre-Biased Soft Start
• 700-kHz Switching Frequency
• Cycle-by-Cycle Over-Current Limiting Control
• 30-mV to 300-mV OCP Threshold Voltage
• Thermally Compensated OCP by 4000 ppm/°C at
ITRIP

2 Applications
• Point-of-Load Regulation in Low Power Systems
for Wide Range of Applications
– Digital TV Power Supply
– Networking Home Pin
– Digital Set-Top Box (STB)
– DVD Player/Recorder
– Gaming Consoles

3 Description
The TPS53127 is a dual, adaptive on-time D-CAP2™
mode synchronous buck controller. The part enables system designers to cost effectively complete the
suite of various end equipment's power bus
regulators with a low external component count and
low standby consumption. The main control loop for
the TPS53127 uses the D-CAP2™ Mode topology which provides a very fast transient response with no
external component.
The TPS53127 also has a proprietary circuit that
enables the device to adapt not only low equivalent
series resistance (ESR) output capacitors such as
POSCAP/SP-CAP, but also ceramic capacitor. The part provides a convenient and efficient operation
with conversion voltages from 4.5 V to 24 V and
output voltage from 0.76 V to 5.5 V.
The TPS53127 is available in the 24 pin RGE/PW
package, and is specified from –40°C to 85°C
ambient temperature range.