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부품번호 | AUR9707 기능 |
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기능 | Dual High-efficiency PWM Step-down DC-DC Converter | ||
제조업체 | BCD | ||
로고 | |||
전체 15 페이지수
Data Sheet
Dual High-efficiency PWM Step-down DC-DC Converter with OVP
AUR9707
General Description
The AUR9707 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 included Soft Start (SS), Under
Voltage Lock Out (UVLO), Input Over Voltage
Protection (IOVP) 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 AUR9707 is available in WDFN-3×3-12
package.
Features
• Dual Channel 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 Switches for Synchronous
Rectification with High Efficiency
• Feedback Voltage: 600mV
• 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
• Internal Input Over Voltage Protection
Applications
• Mobile Phone, Digital Camera and MP3 Player
• Headset, Radio and Other Hand-held Instrument
• Post DC-DC Voltage Regulation
• PDA and Notebook Computer
WDFN-3×3-12
Figure 1. Package Type of AUR9707
Feb. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
1
Dual High-efficiency PWM Step-down DC-DC Converter with OVP
Absolute Maximum Ratings (Note 1)
Data Sheet
AUR9707
Parameter
Supply Input Voltage
Enable Input Voltage
Output Voltage
VIN1-VIN2 Voltage (Note 2)
Power Dissipation (On PCB, TA=30°C)
Thermal Resistance (Junction to Ambient, Simulation)
Thermal Resistance (Junction to Case, Simulation)
Operating Junction Temperature
Operating Temperature
Storage Temperature
ESD (Human Body Model)
ESD (Machine Model)
Symbol
VIN
VEN
VOUT
VDF
PD
θJA
θJC
TJ
TO
TS
VHBM
VMM
Value
0 to 6.5
-0.3 to VIN+0.3
-0.3 to VIN+0.3
-0.3 to 0.3
2.31
41
4.2
160
-40 to 85
-55 to 150
2000
200
Unit
V
V
V
V
W
°C/W
°C/W
°C
°C
°C
V
V
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to
the device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute
Maximum Ratings” for extended periods may affect device reliability.
Note 2:│VIN1-VIN2│voltage difference can not exceed 0.3V, otherwise, the chip will be damaged.
Recommended Operating Conditions
Parameter
Supply Input Voltage
Junction Temperature Range
Ambient Temperature Range
Symbol
VIN
TJ
TA
Min
2.5
-20
-40
Max
5.5
125
80
Unit
V
°C
°C
Feb. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
4
4페이지 Dual High-efficiency PWM Step-down DC-DC Converter with OVP
Typical Performance Characteristics (Continued)
Data Sheet
AUR9707
Figure 8. Output Voltage vs. Output Current
Figure 9. UVLO Threshold vs. Temperature
Figure 10. Output Voltage vs. Output Current
Figure 11. Frequency vs. Temperature
Feb. 2012 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |