AP1602 Datasheet, PDF (1/7 Pages) Anachip Corp – Step-Up DC/DC Converter

Step-Up DC/DC Converter
AP1602
„ Features
-A Guaranteed Start-Up from less than 0.9 V.
-High Efficiency.
-Low Quiescent Current.
-Less Number of External Components needed.
-Low Ripple and Low Noise.
-Space Saving Packages: SOT89-5
„ Applications
-Pagers.
-Cameras.
-Wireless Microphones.
-Pocket Organizers.
-Battery Backup Suppliers.
-Portable Instruments.
„ Pin Assignments
REF ¹
5 OUT
GND 2 ^AP1602A
SHDN 3
74 LX
FB ¹
5 LX
GND 2 ^AP1602B
REF 3
74 OUT
SOT89-5L
„ General Description
The AP1602 is a high efficiency step-up DC/DC
converter for applications using 1 to 2 NiMH battery
cells. Only three external components are required
to deliver a fixed output voltage of 3.3V. The
AP1602 starts up from less than 0.9V input with
1mA load. Pulse Frequency Modulation scheme
brings optimized performance for applications with
light output loading and low input voltages. The
output ripple and noise are lower compared with the
circuits operating in PSM mode.
The PFM control circuit operating in 100KHz (max.)
switching rate results in smaller passive
components. The space saving SOT89-5 packages
make the AP1602 an ideal choice of DC/DC
converter for space conscious applications, like
pagers, electronic cameras, and wireless
microphones.
„ Pin Descriptions
Pin
Name
REF
OUT
LX
GND
SHDN
FB
Pin No.
AB
13
54
45
22
3-
-1
Description
1.2V Reference Voltage. Bypass
with a 0.1µF capacitor.
Power Output. OUT provides
bootstrap power to the IC.
N-Channel and P-Channel Power
MOSFET Drain
Ground
Shutdown Input. Drive high
(>80% of V_OUT) for operating
mode. Drive low (<20% of V_OUT)
for shutdown mode. Connect to
OUT for normal operation.
Feedback pin
„ Ordering Information
AP1602 X X X X
Version
A: A version
B: B version
Package
Y: SOT89-5L
Lead Free
Packing
Blank : Normal
Blank : Tube
L : Lead Free Package A : Taping
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev. 0.1 Apr. 14, 2004
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