TPS54528_15 Datasheet, PDF (1/26 Pages) Texas Instruments – TPS54528 4.5-V To 18-V Input, 5-A Synchronous Step-Down Converter With Eco-Mode™

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TPS54528
SLVSAY4C – JULY 2011 – REVISED MARCH 2014
TPS54528 4.5-V To 18-V Input, 5-A Synchronous Step-Down Converter With Eco-Mode™
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 6 V
• Highly Efficient Integrated FETs Optimized
for Lower Duty Cycle Applications
– 65 mΩ (High Side) and 36 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
• Auto-Skip Eco-mode™ for High Efficiency at Light
Load
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)
3 Description
The TPS54528 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54528
enables system designers to complete the suite of
various end-equipment power bus regulators with a
cost effective, low component count, low standby
current solution. The main control loop for the
TPS54528 uses the D-CAP2™ mode control that
provides a fast transient response with no external
compensation components. The adaptive on-time
control supports seamless transition between PWM
mode at higher load conditions and Eco-mode™
operation at light loads. Eco-mode™ allows the
TPS54528 to maintain high efficiency during lighter
load conditions. The TPS54528 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 6 V. The device
also features an adjustable soft start time. The
TPS54528 is available in the 8-terminal DDA
package, and designed to operate from –40°C to
85°C.
Device Information
ORDER NUMBER
PACKAGE
BODY SIZE
TPS54528DDA
HSOP (8)
4,89 mm × 3,9 mm
4 Simplified Schematic
TPS54528
1.05-V, Load Transient Response
Vout (50 mV/div)
Iout (2 A/div)
t - Time - 100 ms/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.