Manual

ManualsBrandsDiodes ManualsHardwareAP1605

AP1605

PWM/PFM DUAL-MODE STEP-DOWN SWITCHING

REGULATOR

AP1605 Rev. 2 1 of 8 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

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

• Oscillation frequency: 300KHz (Typ.)

• With a power-off function.

• Built-in internal SW P-channel MOS

• Lead Free package: SOP-8L

• 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

• Power supplies for audio equipment,

including portable CD players and

headphone stereo equipment

• Fixed voltage power supply for cameras,

video equipment and communications

equipment

• Power supplies for microcomputers.

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

two lithium-ion cells to 3.3V/3V

• Conversion of AC adapter input to 5V/3V

AP 1605 S X - 13

Package PackingLead 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

Summary of content (8 pages)

PAGE 1
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR General Description Features • • • • • • • • • 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. 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 Oscillation frequency: 300KHz (Typ.) With a power-off function.
PAGE 2
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Pin Assignments ( Top View ) FB 1 8 Vss CE 2 7 Vss Vcc 3 6 SW PVcc 4 5 SW SOP-8L Pin Descriptions Pin Name Pin No. FB 1 CE 2 Vcc 3 PVcc 4 SW 5, 6 Vss 7, 8 AP1605 Rev. 2 Description Feedback pin Chip Enable: H: Enable L: Disable IC signal power supply pin, add a 10Ω resistor to PVcc and a 0.1µF capacitor to GND. IC power supply pin Switch Pin. Connect external inductor/diode here.
PAGE 3
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Block Diagram SW PV CC FB AP1605 V CC PWM /PFM -Switched Control Circuit + - CE Oscillation Circuit Reference Voltage Source V SS Absolute Maximum Ratings Symbol Rating Unit VCC Pin Voltage VSS - 0.3 to VSS + 8 V PVCC Pin Voltage VSS - 0.3 to VSS + 8 V FB FB Pin Voltage VSS - 0.3 to VSS + 8 V VCC PVCC Parameter VCE ON/OFF Pin Voltage VSS - 0.3 to VSS + 8 V VSW Switch Pin Voltage VSS - 0.3 to VIN + 0.
PAGE 4
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Electrical Characteristics Symbol VIN VREF VUVLO MAXDTY PFMDTY ISW Parameter Conditions Min. Input Voltage AP1605 Series 2.5 Internal Reference Voltage 1.
PAGE 5
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Typical Application Circuit （1） Normal Application OUT PV CC SW CC RA R VCC FB + AP1605 V CC RB =~200K D1 C VCC - RCE 100K CE V SS CCE 0.1uF Vout = VFB × (1 + RA ) RB （2） Application with Short Circuit Protection V IN : 2.5V~7V V OUT : 1.8V PV CC SW D VCC 1N4148 for above 5V Vin and Schottky for below 5V Vin CC AP 1605 RA V CC FB R ON /OFF 3.5M R Bias 10M C PVCC C VCC 100 uF 0.1uF C ON /OFF 0.
PAGE 6
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Test Circuit Functional Description PWM/PFM Control (AP1605 Series) The AP1605 consists of DC/DC converters that employ a PWM/PFM auto-switch system.
PAGE 7
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR Marking Information (1) SOP-8L ( Top View ) 5 8 L : Lead Free G : Green YY : Year : 08, 09,10~ WW : Week : 01~52; 52 represents 52 and 53 week X : Internal Code Logo AP1605 YY WW X X Part Number 1 Package Information 4 ( All Dimensions in mm ) 0.254 0.10/0.20 3.85/3.95 5.90/6.10 (1) Package Type: SOP-8L Gauge Plane Seating Plane 0.62/0.82 Detail "A" 7°~9° 0.15/0.25 1.30/1.50 1.75max. 0.35max. 45° 7°~9° Detail "A" 0°/8° 0.3/0.
PAGE 8
AP1605 PWM/PFM DUAL-MODE STEP-DOWN SWITCHING REGULATOR IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others.