AP1609 Datasheet, PDF (1/8 Pages) Anachip Corp – PWM/PFM Dual Mode Step-up DC/DC Converter

PWM/PFM Dual Mode Step-up DC/DC Converter
AP1609
„ Features
- Input Voltage Range: 2.5~6V
- Output Voltage Range: 3.0~17V（±2.5%）
- PWM/PFM Switching Control
- Oscillator Frequency: 300KHz（±20%）
- High Efficiency: 91%（Typ .）
- Stand-by Current: I_STB＝1µA.（Typ.）
- Built-in internal N-Channel MOS
- Pb-Free Package: SOP-8L/TSSOP-8L
„ Applications
- Electronic Information Organizers
- Palmtops
- Cellular and portable phones
- Portable Audio Systems
- Various Multi-function Power Supplies
„ Pin Assignment
„ General Descriptions
The AP1609 is high efficient step-up DC/DC
converter. Large output current is possible having
a built in internal N channel MOSFET, and using an
external coil and diode.
Output voltage is programmable with 1.23V of
standard voltage supply internal, and using
externally connected components, output voltage
（FB） can be set up at will.
With a 300KHz switching frequency, the size of the
external components can be reduced. Control
switches from PFM to PWM during light loads with
the AP1609（PWM/PFM switchable）and the series
is highly efficient from light loads to large output
currents.
During stand-by time （CE pin “Low”）, current
consumption is reduced to 1µA.
„ Pin Descriptions
CE ¹
Vcc ²
FB ³
PGND 4
AP1609
SOP-8L
8 GND
7 GND
6 LX
5 _LX
GND
Vcc
Vcc
CE
1
8
2
7
AP1609
3
6
4
5
TSSOP-8L
LX
PGND
PGND
FB
Pin
Name
Pin No.
SOP TSSOP
Description
FB 3
5 Feedback pin
Chip Enable:
CE 1
4
H: Enable
L: Disable
Vcc 2 2、3 IC signal power supply pin
PGND 4 6、7 Power MOSFET GND
Switch Pin. Connect
LX 5、6
8
external inductor/diode
here. Minimize trace area
at this pin to reduce EMI.
GND 7、8 1 GND Pin
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.1.2 Mar.25, 2005
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