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AP1609

PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER

AP1609 Rev. 2 1 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Lead-free

• Input Voltage Range: 2.5~6V

• Output Voltage Range: 3.0~17V (±2.5%)

• PWM/PFM Switching Control

• Oscillator Frequency: 300KHz (±20%)

• High Efficiency: 91% (Typ.)

• Stand-by Current: I

STB

1 = µA (Typ.)

• Built-in internal N-Channel MOS

• Lead Free Package: SOP-8L

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

(No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

The AP1609 is a high efficient step-up DC/DC converter. Large

output current is possible having a built in internal N channel

MOSFET, and using an external coil and diode.

Output voltage is programmable with 1.23V of standard voltage

supply internal, and using externally connected components,

output voltage (FB) can be set up at will.

With a 300KHz switching frequency, the size of the external

components can be reduced. Control switches from PFM to PWM

during light loads with the AP1609 (PWM/PFM switchable) and

the series are highly efficient from light loads to large output

currents.

During stand-by time (CE pin “Low”), current consumption is

reduced to 1µA.

• Electronic Information Organizers

• Palmtops

• Cellular and Portable Phones

• Portable Audio Systems

• Various Multi-Function Power Supplies

AP 1609 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

AP1609SL-13 S SOP-8L 2500/Tape & Reel -13

AP1609SG-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 (9 pages)

PAGE 1
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER General Description Features • • • • • • • • • • The AP1609 is a high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode. Input Voltage Range: 2.5~6V Output Voltage Range: 3.0~17V (±2.5%) PWM/PFM Switching Control Oscillator Frequency: 300KHz (±20%) High Efficiency: 91% (Typ.) Stand-by Current: ISTB 1 = µA (Typ.
PAGE 2
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Pin Assignments ( Top View ) CE 1 8 GND Vcc 2 7 GND FB 3 6 LX PGND 4 5 LX SOP-8L Pin Descriptions Pin Name Pin Number CE 1 Vcc FB PGND 2 3 4 LX 5, 6 GND 7, 8 AP1609 Rev. 2 Description Chip Enable: H: Enable L: Disable IC signal power supply pin Feedback pin Power MOSFET GND Switch Pin. Connect external inductor/diode here. Minimize trace area at this pin to reduce EMI. GND Pin 2 of 9 www.diodes.
PAGE 3
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Block Diagram Vcc FB Phase Compensation + + - CE Vref with CE LX Buffer, Driver - PWM/PFM Controller PWM Comparator Ramp Wave Generator, OSC GND PGND Absolute Maximum Ratings Symbol VCC VFB VCE VSW ILX PD TOPR TSTG AP1609 Rev. 2 Parameter VIN Pin Voltage FB Pin Voltage CE Pin Voltage Switch Voltage (LX to GND) Switch Current Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature 3 of 9 www.diodes.
PAGE 4
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Electrical Characteristics AP1609 Symbol VFB VCC VOUT ( FOSC = 300kHz, VOUT = 5V ) Parameter Conditions ICCQ ISD FB Voltage Input Voltage Output Voltage Maximum Switching Output Current Drain-Source On-State Resistance Quiescent Current Shutdown Current Fosc Oscillator Frequency MAXDTY PFMDTY Maximum Duty Ratio PFM Duty Ratio IOUT RDS (ON) VCEH CE “High” Voltage VCEL EFFI CE “Low” Voltage Efficiency AP1609 Rev. 2 TA = 25 oC Max Units Min Typ.
PAGE 5
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Typical Application Circuit (1) Normal Circuit 10uH 2.5V~6V SS340 Vout 100 VCC LX CE FB R1 CBP Option 330K 100u 0.1u 3.3u 0.1u 0.1u PGND GND Vout = 1.23× (1+ R1 R2 100u R2 ) , R2= 10K~100K (2) HV Circuit 10uH above 5.5V SS340 15V R VCC LX CE FB R1 330K 470u 0.1u ZD 5V 3.3u 0.1u 0.1u GND PGND Vout = 1.23× (1+ AP1609 Rev. 2 CBP Option R1 R2 5 of 9 www.diodes.
PAGE 6
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Typical Performance Characteristics Vcc vs. Supply Current 210 VCE =Vcc Load = 300mA 350 150 Frequency (KHz) Supply Current (uA) 180 Vcc vs. Frequency 400 120 90 60 30 300 250 200 150 100 0 3 3.5 4 4.5 5 5.5 3 6 3.5 4 Vcc (V) Line Regulation 1 Load Regulation (%) Line Regulation (%) 0.4 0.2 0 -0.2 -0.4 -0.6 -0.8 1 3 3.5 4 4.5 5 5.5 Vcc = 5V 0.5 0 -0.5 -1 -1.5 Load = 50mA -1 -2 0 6 200 Vcc (V) Load vs.
PAGE 7
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER Typical Performance Characteristics Temperature vs. Frequency 400 Supply Current (uA) 350 Frequency (KHz) (Continued) 300 250 200 Load = 300mA Vcc = 5V 150 100 -50 -25 0 25 50 o 75 100 200 180 160 140 120 100 80 60 40 20 0 Vout / Vout (%) Temperature ( C) Temperature vs. Supply Current Vcc = 5V -50 -25 0 25 50 75 100 o Temperature ( C) Temperature vs.
PAGE 8
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER 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 AP1609 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° 0.3/0.5 1.
PAGE 9
AP1609 PWM/PFM DUAL MODE STEP-UP DC/DC CONVERTER 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.