AP1604 Datasheet, PDF (1/7 Pages) Anachip Corp – PWM/PFM Dual Mode Step-down DC/DC Converter

PWM/PFM Dual Mode Step-down DC/DC Converter
AP1604
„ Features
- Input voltage range: 2.2V~5.5V (V_OUT type)
- Oscillator frequency: 600KHz (Typ.)
- Internal reference: 1.0V (Typ.)
- High efficiency: 93% (Typ .)
- Stand-by capability: I_STB=2µA. (Typ.)
- Soft-start time set-up externally type possible
- Current limit and thermal shutdown protection
- Pb-Free Package: SOT23-5, SON-6(3×3×0.8mm)
„ Applications
● Electronic Information Organizers
● Palmtops
● Cellular and portable phones
● Portable Audio Systems
● Various Multi-function Power Supplies
„ General Descriptions
The AP1604 series are multi-functional step-down
DC/DC converters with built-in speed, low ON
resistance drivers. It is capable to deliver more than
800mA output current with external coil, diode and
capacitor.
Output voltage is set-up by the external resistors. (±
2.5% accuracy). The 600KHz AP1604 that can
work out with small value external components
comes out more compact board.
The device switches to and works under PFM mode
with light loads. It keeps at high efficiency for both
light loads and large output current.
AP1604 can be soft-start with a proper capacitor
connected between CE/SS pin and ground. The
stand-by current is less than 2uA when CE/SS pin
is at “LOW” status. The device is forced to switch
off as the voltage at that pin is lower than the
stipulated voltage.
„ Pin Assignment
(Top View)
FB
CE/SS
5
4
AP1604A
123
V_{OUT GND} V_CC
SOT23-5
„ Pin Descriptions
Pin Name
V_OUT
V_CC
GND
CE/SS
FB
SV_CC
Function
Output Voltage
Input Supply
Ground
Chip Enable / Soft Start
Feedback pin
Signal Power for SON only
FB 1
SV_CC 2
CE 3
6 V_OUT
5 V_CC
4 GND
SON-6
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 Jun. 27, 2005
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