參數(shù)資料
型號： AP1601M8A
英文描述： Step-Up DC/DC Converter
中文描述： 升壓型DC / DC轉(zhuǎn)換器
文件頁數(shù)： 1/9頁
文件大小： 207K
代理商： AP1601M8A
AP1601
Step-Up DC/DC Converter
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: MSOP-8L and
MSOP-10L.
Applications
-Pagers.
-Cameras.
-Wireless Microphones.
-Pocket Organizers.
-Battery Backup Suppliers.
-Portable Instruments.
Pin Assignments
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. 1.1 Apr. 14, 2005
1/9
General Description
The AP1601 is a high efficiency step-up DC/DC
converter for applications using 1 to 4 NiMH battery
cells. Only three external components are required
to deliver a fixed output voltage of 3.3V or 5V. The
AP1601 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
components. The space saving MSOP packages
make the AP1601 an ideal choice of DC/DC
converter for space conscious applications, like
pagers,
electronic
cameras,
microphones.
in
smaller
passive
and
wireless
1
2
3
4
8
7
6
5
MSOP-8L
FB
LBI
LBO
REF
OUT
LX
GND
SHDN
1
2
3
4
5
10
9
8
7
6
MSOP-10L
FB
LBI
LBO
OUT
LX
GND
BATT
SHDN
CLSEL
REF
Pin Descriptions
Name
Use a resistor network to set the output
voltage from +2.0V to +5.5V.
If FB=Vout, Vout=3.3V fix voltage
FB=GND, Vout=5V fix voltage
Low-Battery Comparator Input. Internally set
to trip at +1.30V.
Open-Drain Low-Battery Comparator Output.
Description
FB
LBI
LBO
Connect
LBO
to OUT through a 100k
resistor. Output is low when V
LBI
is <1.2V.
LBO
is high impedance during shutdown.
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
GND 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.
Current-Limit Select Input. CLSEL = OUT sets
the current limit to 0.8A. CLSEL = GND sets
the current limit to 0.4A.
Battery
Input
and
Connection. If damping switch is unused,
leave BATT unconnected.
REF
OUT
LX
SHDN
CLSEL
BATT
Damping
Switch
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