VESTEL MB185 IDTV, Service Manual

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18
Electrical Characteristics & Maximum ratings
C. TPS54528 (U101)
General 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 6.0 V. The device also features an adjustable soft start time. The TPS54528 is available in the 8-pin DDA
package, and designed to operate from –40°C to 85°C.
Features

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 6.0 V