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Diodes Semiconductor Electronic Components Datasheet

AUR9710 Datasheet

Step-down DC-DC Converter

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Data Sheet
1.5MHz, 1A, Step-down DC-DC Converter
AUR9710
General Description
The AUR9710 is a high efficiency step-down
DC-DC voltage converter. The chip operation is
optimized using constant frequency, peak-current
mode architecture with built-in synchronous power
MOSFET switchers and internal compensators to
reduce external part counts. It is automatically
switching between the normal PWM mode and LDO
mode to offer improved system power efficiency
covering a wide range of loading conditions.
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) and Thermal Shutdown
Detection (TSD) are integrated to provide reliable
product applications.
The device is available in adjustable output voltage
versions ranging from 1V to 3.3V, and is able to
deliver up to 1A.
The AUR9710 is available in WDFN-3×3-10
package.
Features
• High Efficiency Buck Power Converter
• Low Quiescent Current
• Output Current: 1A
• Adjustable Output Voltage from 1V to 3.3V
• Wide Operating Voltage Range: 2.5V to 5.5V
• Built-in Power Switchers for Synchronous
Rectification with High Efficiency
• Feedback Voltage: 800mV
• 1.5MHz Constant Frequency Operation
• Automatic PWM/LDO Mode Switching Control
• Thermal Shutdown Protection
• Low Drop-out Operation at 100% Duty Cycle
• No Schottky Diode Required
Applications
Battery Powered Devices
Mobile Phone, Digital Camera and MP3 Player
Headset, Radio and Other Hand-held Instruments
PCI Card, WiFi card
PDA and Notebook Computer
WDFN-3×3-10
Figure 1. Package Type of AUR9710
Nov. 2011 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AUR9710 Datasheet

Step-down DC-DC Converter

No Preview Available !

1.5MHz, 1A, Step-down DC-DC Converter
Pin Configuration
D Package
(WDFN-3×3-10)
Data Sheet
AUR9710
Figure 2. Pin Configuration of AUR9710 (Top View)
Pin Description
Pin Number
1
2, 9
3, 8
4, 7
5, 6
10
Pin Name
FB
GND
SW
VIN
NC
EN
Function
Feedback voltage from the output of the power supply
This pin is the GND reference for the NMOSFET power stage. It
must be connected to the system ground
Connected to inductor
Power supply input
No internal connection
Enable signal input, active high
Nov. 2011 Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2


Part Number AUR9710
Description Step-down DC-DC Converter
Maker BCD
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AUR9710 Datasheet PDF






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