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부품번호 | AUR9703 기능 |
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기능 | STEP DOWN DC-DC CONVERTER | ||
제조업체 | BCD | ||
로고 | |||
전체 20 페이지수
Data Sheet
1.5MHz, 800mA, STEP DOWN DC-DC CONVERTER AUR9703
General Description
The AUR9703 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), and Thermal Shutdown
Detection (TSD) 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 800mA.
The AUR9703 is available in TSOT-23-5 package.
Features
• High Efficiency Buck Power Converter
• Low Quiescent Current
• Output Current: 800mA
• 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
Applications
• Mobile Phone, Digital Camera and MP3 Player
• Headset, Radio and Other Hand-held Instrument
• Post DC-DC Voltage Regulation
• PDA and Notebook Computer
Nov. 2011 Rev. 1 .0
TSOT-23-5
Figure 1. Package Type of AUR9703
BCD Semiconductor Manufacturing Limited
1
Data Sheet
1.5MHz, 800mA, STEP DOWN DC-DC CONVERTER
Absolute Maximum Ratings (Note 1)
AUR9703
Parameter
Supply Input Voltage
Enable Input Voltage
Output Voltage
Power Dissipation (On PCB, TA=25°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
PD
θJA
θJC
TJ
TOP
TSTG
VHBM
VMM
Value
0 to 6.0
-0.3 to VIN+0.3
-0.3 to VIN+0.3
0.85
118.31
113.67
160
-40 to 85
-55 to 150
2000
200
Unit
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.
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
Nov. 2011 Rev. 1 .0
BCD Semiconductor Manufacturing Limited
4
4페이지 Data Sheet
1.5MHz, 800mA, STEP DOWN DC-DC CONVERTER
Typical Performance Characteristics (Continued)
AUR9703
100
90
80
70
60
50
40
30
V = 4.2V
IN
V = 5.0V
20
IN
V = 5.5V
IN
10
V =3.3V
OUT
0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Output Current (A)
1.03
1.02
1.01
1.00
V =2.5V
IN
V =3.3V
IN
V =4.2V
IN
V =5.0V
IN
V =5.5V
IN
0.99
0.98
0.97
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Output Current (A)
Figure 8. Efficiency vs. Output Current (VOUT=3.3V)
Figure 9. Load Regulation (VOUT=1.0±0.03V)
1.24
1.23
1.22
1.21
V =2.5V
IN
V =3.3V
IN
V =4.2V
IN
V =5.0V
IN
V =5.5V
IN
1.20
1.19
1.18
1.17
1.16
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Output Current (A)
1.85
1.84
1.83
1.82
1.81
V =2.5V
IN
V =3.3V
IN
V =4.2V
IN
V =5.0V
IN
V =5.5V
IN
1.80
1.79
1.78
1.77
1.76
1.75
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
Output Current (A)
Figure 10. Load Regulation (VOUT=1.2±0.03V)
Figure 11. Load Regulation (VOUT=1.8±0.03V)
Nov. 2011 Rev. 1 .0
BCD Semiconductor Manufacturing Limited
7
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부품번호 | 상세설명 및 기능 | 제조사 |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |