Diodes AUR9718B - Manual

Data Sheet
1.5MHz, 2.5A, Step-down DC-DC Converter AUR9718B
Nov. 2012 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
1
General Description
The AUR9718B is a high efficiency step-down
DC-DC voltage converter. The chip operation is
optimized by peak-current mode architecture with
built-in synchronous power MOSFET switchers.
The oscillator and timing capacitors are all built-in
providing an internal switching frequency of 1.5MHz
that allows the use of small surface mount inductors
and capacitors for portable product implementations.
Additional features including Soft Start (SS), Under
Voltage Lock Out (UVLO), Thermal Shutdown
Detection (TSD) and short circuit protection are
integrated to provide reliable product applications.
The device is available in adjustable output voltage
versions ranging from 0.8V to
V
IN
when input
voltage range is from 2.7V to 5.5V, and is able to
deliver up to
2.5A.
The AUR9718B is available in DFN-3×3-6 package.
Features
• High Efficiency Buck Power Converter
• Low R
DS(ON)
Internal Switches : 100m Ω
• Output Current: 2.5A
• Adjustable Output Voltage from
0.8V to V
IN
• Wide Operating Voltage Range: 2.7V to 5.5V
•
4
Built-in Power Switchers for Synchronous
Rectification with High Efficiency
• Feedback Voltage Allows Output: 800mV
• 1.5MHz Switching Frequency
• Thermal Shutdown Protection
• Low Drop-out Operation at 100% Duty Cycle
• No Schottky Diode Required
• Input Over Voltage Protection
Applications
• LCD TV
• Set Top Box
• Post DC-DC Voltage Regulation
•
PDA and Notebook Computer
Figure 1. Package Type of AUR9718B
DFN-3Ч3-6