AP1604A

PWM/PFM DUAL MODE STEP-DOWN DC/DC

CONVERTER

AP1604A Rev. 2

1 of 7

OCTOBER 2006

www.diodes.com

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Oscillator frequency: 600KHz (Typ.)

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Internal reference: 1.0V (Typ.)

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High efficiency: 93% (Typ.)

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Soft-start time set-up externally type possible

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Current limit and thermal shutdown protection

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Packages: SOT25-5L

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Lead Free Finish/RoHS Compliant for Lead Free and

“Green” products (Note 1)

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SOT25-5L: Available in “Green” Molding Compound

(No Br, Sb)

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.

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Electronic Information Organizers

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Palmtops

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Cellular and portable phones

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Portable Audio Systems

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Various Multi-function Power Supplies

Notes:

1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.

Note:

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

http://www.diodes.com/datasheets/ap02001.pdf.

Features

General Description

Applications

Ordering Information

7” Tape and Reel

Device

(Note 2)

Package Code Packaging

Quantity

Part Number Suffix

AP1604AW

W

SOT25-5L

3000/Tape & Reel

-7

AP1604 X X X X

W: SOT25-5L

Packing

-7 : Taping

Package

A: AP1604A

Version

Lead Free

L : Lead Free

G : Green