Diodes AUR9719 - Manual

Data Sheet
1.5MHz, 2A, STEP DOWN DC-DC CONVERTER AUR9719
Nov. 2011 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
1
General Description
The AUR9719 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 MOS 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.
Integrated Soft Start (SS), Under Voltage Lock Out
(UVLO), Thermal Shutdown Detection (TSD) and
Short Circuit Protection are designed to provide
reliable product applications.
The device is available in adjustable output voltage
versions ranging from 0.8V to 9×V
IN
when input
voltage range is from 2.7V to 5.5V , and is able to
deliver up to 2.0A.
The AUR9719 is available in DFN-3×3-6 package.
Features
• High Efficiency Buck Power Converter
• Output Current: 2A
• Low R
DS(ON)
Internal Switch: 100m Ω
• Adjustable Output Voltage from 0.8V to 9×V
IN
• Wide Operating Voltage Range: 2.7V to 5.5V
• Built-in Power Switches for Synchronous
Rectification with High Efficiency
• 800mV Feedback Voltage
• 1.5MHz Constant Frequency Operation
• Thermal Shutdown Protection
• Low Drop-out Operation at 90% Duty Cycle
• No Schottky Diode Required
Applications
• LCD TV
• Set Top Box
• Post DC-DC Voltage Regulation
• PDA and Notebook Computers
Figure 1. Package Type of AUR9719
DFN-3Ч3-6