APW7137
1MHz, High Efficiency, Step-Up Converter with Internal FET Switch
Features
•
•
•
•
•
•
Wide 2.5V to 6V Input Voltage Range
Built-in 0.6Ω N-Channel MOSFET
Built-in Soft-Start
High Efficiency up to 90%
<1µA Quiescent Current During Shutdown
Current-Mode Operation
- Stable with Ceramic Output Capacitors
- Fast Transient Response
General Description
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.
100
90
80
V
IN
=5V
•
•
•
•
Current-Limit Protection
Over-Temperature Protection with Hysteresis
Available in a Tiny 5-Pin SOT-23 Package
(RoHS Compliant)
Efficiency,
η
(%)
Lead Free and Green Devices Available
70
60
50
40
30
20
V
IN
=3.3V
Applications
•
•
•
•
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Boost Regulators
10
0
0.1
1
10
V
OUT
=12V
100
1000
Output Current, I
OUT
(mA)
Pin Configuration
Simplified Application Circuit
V
IN
L1
10µH
5 VIN
2
GND
LX 1
R1
1.2MΩ
V
OUT
12V
C2
4.7µF
LX 1
GND 2
FB 3
5 VIN
4 EN
5V
C1
4.7µF
SOT-23-5 (Top View)
OFF
ON
4
APW7137
EN
FB 3
R2
137kΩ
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 - Oct., 2008
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
