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부품번호 | APW7079 기능 |
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기능 | Low-Supply-Current Synchronous Step-up DC-DC Converter | ||
제조업체 | ANPEC | ||
로고 | |||
APW7079
Low-Supply-Current Synchronous Step-up DC-DC Converter
Features
• 0.9V Typical Start-up Input Voltage
• 11µA Typical No Load Quiescent Current
• PFM Operation
• High Efficiency up to 92%
• Fixed 1.8V, 2.6V, 2.8V, 3V, 3.3V, 3.8V, 4.5V or 5V
Output Voltage
• 600mA Internal Switch Current
• Internal Synchronous Rectifier
• SOT-89 Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• Toy
• Wireless Mouse
• Portable Instrument
Pin Configuration
SOT 89
General Description
The APW7079 is a compact, PFM mode, and step-up
DC-DC converter with low quiescent current. The inter-
nal synchronous rectifier reduces cost and PCB space
by eliminating the need for an external Schottky diode.
Low on-resistance of the internal switches improves the
efficiency up to 92%. The start-up voltage is guaranteed
below 1V. After start-up, the device can operate with input
voltage down to 0.7V. The APW7079 is suitable for por-
table battery-powered applications. Consuming only 11µA
quiescent current and an optimized control scheme al-
lows the device to operate at very high efficiency over the
entire load current range.
100
90
80
70
60
50
40
30
20
10
0
0.1
Efficiency vs. Output Current
VIN=0.9V
VIN=1.0V
VIN=1.2V
VIN=2.4V
VIN=1.5V
APW7079-30
1 10 100 1000
Top View
Simplified Application Circuit
VIN IIN
L1
22µH
C1
22µF
LX VOUT
GND
IOUT VOUT
C2
47µF
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Jun., 2009
1
www.anpec.com.tw
APW7079
Typical Operating Characteristics
(Refer to the application circuit in the section “Typical Application Circuit”, VIN=1.5V, L1=22µH, TA=25oC unless otherwise noted.)
Efficiency vs. Output Current
Output Voltage vs. Output Current
100 1.84
90 1.82
80 1.80
70
60 VIN=0.9V
50 VIN=1.0V
40
VIN=1.2V
30
20
10
0
0.1
1
VIN=1.5V
APW7079-18
10 100 1000
1.78
1.76
1.74
1.72
1.70
1.68
1.66
1.64
0
VIN=0.9V
VIN=1.0V
VIN=1.2V
VIN=1.5V
APW7079-18
50 100 150 200 250 300
Output Current, IOUT (mA)
Efficiency vs. Output Current
100
Output Voltage vs. Output Current
3.1
90
80 3.0
70
60 VIN=0.9V
50 VIN=1.0V
40 VIN=2.4V
30 VIN=1.2V
20
10
0
0.1
VIN=1.5V
APW7079-30
1 10 100 1000
2.9 VIN=2.4V
VIN=1.5V
2.8 VIN=1.2V
2.7 VIN=1.0V
VIN=0.9V
APW7079-30
2.6
0 50 100 150 200 250 300 350 400
Output Voltage vs. Output Current
100
90
80
70
60
50
40
30
20
10
0
0.1
VIN=0.9V
VIN=1.0V
VIN=1.2V
VIN=1.5V
1 10
VIN=3.6V
VIN=2.4V
APW7079-50
100 1000
Output Voltage vs. Output Current
6
5
4 VIN=3.6V
3 VIN=0.9V
VIN=2.4V
2 VIN=1.0V VIN=1.5V
1 VIN=1.2V
APW7079-50
0
0 50 100 150 200 250 300 350
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Jun., 2009
4
www.anpec.com.tw
4페이지 APW7079
Pin Description
PIN
NO. NAME
FUNCTION
Block Diagram
0.9µs Min.
off-time
Error
Comparator
-
+
VREF
Thermal
Shutdown
Control
Logic
VOUT
2
Zero Crossing
Comparator
+
-
Synchronous
Switch
3 LX
Gate
Driver
Main Switch
4µs Max.
on-time
Typical Application Circuit
Soft
start
Current Limit
Comparator
+
-
RSENSE
1
GND
VIN IIN
L1
22µH
C1
22µF
LX VOUT
GND
IOUT
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Jun., 2009
7
www.anpec.com.tw
7페이지 | |||
구 성 | 총 16 페이지수 | ||
다운로드 | [ APW7079.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |