AP1605

PWM/PFM DUAL-MODE STEP-DOWN SWITCHING

REGULATOR

AP1605 Rev. 2

1 of 8

FEBRUARY 2009

www.diodes.com

Lead-free

•

Low current consumption:

In operation: 100µA max.

Power off: 2µA max.

•

Input voltage: 2.5V to 7V

Adjustable version (+2.5%)

•

PWM/PFM dual Mode

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Oscillation frequency: 300KHz (Typ.)

•

With a power-off function.

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Built-in internal SW P-channel MOS

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Lead Free package: SOP-8L

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SOP-8L: Available in “Green” Molding Compound

(No Br, Sb)

•

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.

•

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

AP 1605 S X - 13

Package

Packing

Lead Free

13 : Tape & Reel

G : Green

S : SOP-8L

L : Lead Free

Device

Package

Code

Packaging

(Note 2)

13” Tape and Reel

Quantity

Part Number Suffix

AP1605SL-13

S

SOP-8L

2500/Tape & Reel

-13

AP1605SG-13

S

SOP-8L

2500/Tape & Reel

-13

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.

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