AP1605

PWM/PFM DUAL-MODE STEP-DOWN SWITCHING

REGULATOR

AP1605 Rev. 1

1 of 7

JANUARY 2007

www.diodes.com

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Low current consumption:

In operation: 100µA max.

Power off: 2µA max.

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Input voltage: 2.5V to 7V

Adjustable version (+2.5%)

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PWM/PFM dual Mode

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Oscillation frequency: 300KHz (Typ.)

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With a power-off function.

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Built-in internal SW P-channel MOS

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Lead Free and Green Package: SOP-8L

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Lead Free Finish/RoHS Compliant (Note 1)

AP1605 consists of CMOS step-down switching regulator with

PWM/PFM dual mode control. These devices include a reference

voltage source, oscillation circuit, error amplifier, internal PMOS and

etc.

AP1605 provides low-ripple power, high efficiency, and excellent

transient characteristics. The PWM/PFM control circuit is able to

vary the duty ratio linearly 0%~0.25% (PFM) and 25%~100%

(PWM).

With the addition of an internal P-channel Power MOS, a coil,

capacitors, and a diode connected externally, these ICs can function

as step-down switching regulators. They serve as ideal power

supply units for portable devices when coupled with the SOP–8L

mini-package, providing such outstanding features as low current

consumption. Since this converter can accommodate an input

voltage of up to 7V, it is also ideal when operating via an AC

adapter.

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On-board power supply of battery

devices for portable telephones,

electronic notebooks, PDA, and other

hand-held sets

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Power supplies for audio equipment,

including portable CD players and

headphone stereo equipment

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Fixed voltage power supply for cameras,

video equipment and communications

equipment

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Power supplies for microcomputers.

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Conversion from four Ni-H or Ni-Cd cells or

two lithium-ion cells to 3.3V/3V

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Conversion of AC adapter input to 5V/3V

AP1605 X X X

Package

Packing

- U : Tube

-13 : Taping

S : SOP-8L

Lead-Free

L : Lead-Free

G : Green

Note: 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

Tube

13” Tape and Reel

Device

(Note 2)

Package

Code

Packaging

Quantity

Part Number

Suffix

Quantity

Part Number

Suffix

AP1605S

S

SOP-8L

100

-U

2500/Tape & Reel

-13