APW7137
1MHz, High Efficiency, Step-Up Converter with Internal FET Switch
General Description
Features
The APW7137 is a fixed switching frequency (1MHz
typical), current-mode, step-up regulator with an inte-
grated N-channel MOSFET. The device allows the usage
of small inductors and output capacitors for portable
devices. The current-mode control scheme provides fast
transient response and good output voltage accuracy.
The APW7137 includes under-voltage lockout, current
limit, and over-temperature shutdown preventing dam-
age in the event of an output overload.
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Wide 2.5V to 6V Input Voltage Range
Built-in 0.6W N-Channel MOSFET
Built-in Soft-Start
High Efficiency up to 90%
<1mA Quiescent Current During Shutdown
Current-Mode Operation
- Stable with Ceramic Output Capacitors
- Fast Transient Response
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Current-Limit Protection
100
Over-Temperature Protection with Hysteresis
Available in a Tiny 5-Pin SOT-23 Package
Lead Free and Green Devices Available
(RoHS Compliant)
VIN=5V
90
80
70
60
VIN=3.3V
50
40
30
20
Applications
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Cell Phone and Smart Phone
10
0
VOUT=12V
100
PDA, PMP, MP3
Digital Camera
Boost Regulators
0.1
1
10
1000
OutputCurrent, I (m A)
OUT
Pin Configuration
Simplified Application Circuit
VIN
5V
VOUT
12V
L1
10mH
LX 1
GND 2
FB 3
5 VIN
4 EN
C1
4.7mF
5
2
1
3
C2
4.7mF
VIN
LX
R1
1.2MW
GND
APW7137
EN FB
SOT-23-5 (Top View)
ON
4
OFF
R2
137kW
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 ã ANPEC Electronics Corp.
1
www.anpec.com.tw
Rev. A.4 - Oct., 2008
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
