Diodes Incorporated AP66300 Synchronous DC-DC Buck Converter

Diodes Incorporated AP66300 Synchronous DC-DC Buck Converter is an adjustable switching frequency, internally compensated component with a 500kHz default internal frequency. The fully integrated AP66300 provides highly efficient step-down DC-DC conversion utilizing a 120mΩ high-side power MOSFET and a 55mΩ low-side power MOSFET. AP66300 enables a continuous load current (up to 3A) with efficiency as high as 95% in enhanced bias. A current mode control operation enables easy loop stabilization while supporting a wide capacitive load output range. The AP66300 is available in a standard Green U-QFN4040-16/SWP (Type UXB) package.

Features

3.8V to 60V input range
3A continuous output current
Output voltage adjustable from 0.8V to 50V
Enhanced efficiency mode with bias
Adjustable switching frequency, 500kHz default
Start-up with pre-biased output
External soft-start with tracking
- Sequential, Ratiometric, or Absolute
- Default internal soft-start of 2ms

Enable pin with 5% tolerance
Soft discharge
±5% power good detection with an internal pull-up resistor
Overvoltage protection and undervoltage protection
Overcurrent protection (OCP) with hiccup
Thermal protection
Green U-QFN4040-16/SWP (Type UXB) package
Lead-free and RoHS compliant
Halogen and Antimony-free, “Green” device

Applications

General-purpose point-of-load DC/DC power conversion
Telecommunication systems
Distributed power supplies
Home audio devices

Consumer electronics
Network systems
FPGA, DSP, and ASIC supplies
Green electronics

Specifications

2.2µA typical shutdown supply current, 6.0µA maximum
43µA typical quiescent supply current, 63µA maximum
1µA maximum switch leakage current
1.7ms typical soft-start period
0.75μA to 1.25μA soft-start charging current range
115ns minimum on-time (typical)
125ns minimum off-time (typical)

Operating temperature ranges
- -40°C to +85°C ambient
- -40°C to +125°C junction
Maximum ESD susceptibility
- ±2500V Human Body Model (HBM)
- ±1500V Charged Device Model (CDM)

Diodes Incorporated AP66300 Synchronous DC-DC Buck Converter

Features

Applications

Specifications

Typical Application

Block Diagram

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