NCP81148 Datasheet | onsemi

Advance Information Synchronous Buck Controller with Auto Power Saving Mode and Built-In LDO NCP81148 is a dual synchronous buck controller that is optimized for converting the battery voltage or adaptor voltage into multiple power rails required in desktop and notebook system. NCP81148 consists of two buck switching controllers with fixed 5.0 V output on channel 2, 3.3 V on channel 1 and two on- board LDOs with three outputs: 5 V / 60 m A and 3.3 V or 12 V / 10 m A. NCP81148 supports high efficiency, fast transient response and provides power good signals. ON Semiconductor proprietary adaptive- ripple control enables seamless transition from CCM to DCM, where converter runs at reduced switching frequency with much higher efficiency at light load. The part operates with supply voltage ranging from 5.5 V to 28 V. NCP81148 is available in a 28- pin QFN package. Features - Wide Input Voltage Range: from 5.5 V to 28 V - Built- in 5 V / 60 m A LDO - Built- in selectable 3.3 V or 12 V / 10 m A LDO - Three Selectable Fixed Frequency 300 KHz, 400 KHz or 600 KHz - 180 Interleaved Operation Between the Two Channels in Continue- Conduction- Mode (CCM) - Selected Power- Saving Mode/Forced PWM Mode - Transient- Response- Enhancement (TRE) Control - Input Supply Voltage Feed Forward Control - Resistive or Lossless Inductor’s DCR Current Sensing - Over- Temperature Protection - Internal Fixed 8.5 ms Soft- Start - Fixed Output Voltages 5 V and 3.3 V - Power Good Outputs for Both Channels - Built- in Adaptive Gate Drivers - Output Discharge Operation - Built- in Over- Voltage, Under- Voltage Protection - Accurate Over- Current Protection - Thermal Shutdown Applications - Desktop / Notebook puters - System Power Supplies - I/O Power Supplies This document contains information on a new product. Specifications and information herein are subject to change without notice. http://onsemi. MARKING DIAGRAM 28 PIN QFN, 4x4 MN SUFFIX CASE 485AR 81148...