TPS54526_15 Datasheet, PDF (1/31 Pages) Texas Instruments – TPS54526 4.5-V to 18-V Input, 5.5-A Synchronous Step-Down Converter with Eco-mode™

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TPS54526
SLVSB84C – MAY 2012 – REVISED JUNE 2014
TPS54526 4.5-V to 18-V Input, 5.5-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 5.5 V
• Highly Efficient Integrated FET’s Optimized
for Lower Duty Cycle Applications
– 63 mΩ (High Side) and 33 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
• Power Good Output
• 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 TPS54526 is an adaptive on-time D-CAP2™
mode synchronous buck converter. The TPS54526
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
TPS54526 uses the D-CAP2™ mode control which
provides a very 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 TPS54526 to maintain high efficiency during
lighter load conditions. The TPS54526 also has a
proprietary circuit that enables the device to adopt to
both low equivalent series resistance (ESR) output
capacitors, such as POSCAP, 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 0.76V and 5.5V. The device
also features an adjustable soft start time and a
power good function. The TPS54526 is available in
the 14-pin HTSSOP package and the 16 pin QFN
package, designed to operate from –40°C to 85°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS54526
HTSSOP (14)
VQFN (16)
5.00mm x 4.40mm
4.00mm x 4.00mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Schematic
U1
TPS54526PWP
V_O (50 mV/div ac coupled)
I_OUT (2A/div)
Slew Rate (0.35A/µsec)
Time Scale (100µsec/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.