UCC2541RHBT ,High Efficiency Synchronous Buck PWM Controller 32-VQFN -40 to 105Features such asOperation Pre-Bias Support and Tracking Capability Dual ±3-A TrueDrive Outputs ..
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UNR9217 ,Silicon NPN epitaxial planer transistor with biult-in resistor
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UCC2541RHBR-UCC2541RHBT
High Efficiency Synchronous Buck PWM Controller 32-VQFN -40 to 105
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SLUS621A − AUGUST 2004 − SEPTEMBER 2005
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FEATURES On-Chip Predictive Gate Drive� for
High-Efficiency Synchronous Buck
Operation Dual ±3-A TrueDrive� Outputs On-Board Programmable Oscillator with
1-MHz Frequency Operation TR Input for Sequencing Operation Overcurrent Protection using a Parallel
Average Current Mode Control Loop 3 Modes to Support 2.7-V to 35-V Input Bias Reverse Current Protection for Output Stage User Programmable Shutdown Using SS Pin ±1.0% Initial Tolerance Bandgap Reference
High Bandwidth Error Amplifiers Thermally Enhanced HTSSOP 20-Pin
PowerPAD� Package and QFN−32 Pin Synchronization Input Supports Pre-Bias Applications
SIMPLIFIED APPLICATION DIAGRAM
APPLICATIONS High Efficiency Non-Isolated Converters
Requiring Advanced Features such as
Pre-Bias Support and Tracking Capability Point-of-Load Modules for Servers, Telecom,
and Data communication Equipments Good for Input Voltages of 3.3 V, 5.0 V,
12.0 V, or Intermediate Bus Voltages
DESCRIPTIONThe UCC2541 is a synchronous buck PWM
controller for high current and low output voltage
applications.
For higher efficiency, it incorporates the Predictive
Gate Drive� technology that virtually eliminates
body diode conduction losses in synchronous
rectifiers.
