AP1604AW

AP1604A DIODES | Alldatasheet

Document overview

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Technical content

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 1 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated

• Input voltage range: 2.2V~5.5V (VOUT type)
• Oscillator frequency: 600KHz (Typ.)
• Internal reference: 1.0V (Typ.)
• High efficiency: 93% (Typ.)
• Stand-by capability: ISTB=2µA. (Typ.)
• Soft-start time set-up externally type possible
• Current limit and thermal shutdown protection
• Packages: SOT25-5L
• Lead Free Finish/RoHS Compliant for Lead Free and “Green” products (Note 1)
• 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.
• Electronic Information Organizers
• Palmtops
• Cellular and portable phones
• Portable Audio Systems
• Various Multi-function Power Supplies 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

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 2 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated Pin Description Pin Assignment 1 32 5 4 CE/SS VOUT VCCGND SOT25-5L FB (Top View) AP1604A Block Diagram Phase Compensation Vref with CE PWM/PFM Controller Ramp Wave Generator, OSC VOUT CE/SS GND VCC PWM Comparator FB Current Limit Soft Start ERR AMP SVCC P i n N a m e Function VOUT Output Voltage GND Ground VCC Input Supply CE/SS Chip Enable / Soft Start FB Feedback pin

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 3 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated Absolute Maximum Ratings TA=25°C Symbol Parameter Ratings Units VCC/SVCC V IN Pin Voltage -0.3 ~ 6.5 V VOUT V OUT Pin Voltage -0.3 ~ V IN+0.3 V VFB FB Pin Voltage -0.3 ~ V IN+0.3 V VCE/SS CE/SS Pin Voltage -0.3 ~ V IN+0.3 V Pd Continuous Total Power Dissipation Internal limited Topr Operating Ambient Temperature -25 ~ +80 °C Tstg Storage Temperature -40 ~ +125 °C

Electrical Characteristics

VIN = 5V, VOUT＝2V, Load = 300mA, TA = 25°C Sym. Parameter Conditions Min. Typ. Max. Units VFB FB 0.975 1.0 1.025 V VIN Input Voltage 2.2 - 5.5 V Line Regulation V IN = 2.2 ~ 5.5V, Load = 10mA - - 0.12 % Load Regulation I OUT = 10 ~ 800mA - - 1.2 % VUVLO UVLO Voltage（min. operating voltage） VCC, voltage required to maintain H at VOUT - - 2 V ICC Operating Current CE/SS = V IN, No Load - 100 150 µA ICCQ Supply Current No external components, CE/SS = VIN, VFB = 1.2V - 90 120 µA ISTB Stand-by Current No external components, CE/SS = 0V, VFB = 0V - 2 - µA ICL Current Limit peak current VIN = 5V, VOUT = 2V 800 1000 1200 mA Fosc Oscillator Frequency Load = 300mA, V IN = 5V, VOUT = 2V 500 600 700 kHz MAXDTY Maximum Duty Ratio 85 90 - % PFMDTY PFM Duty Ratio No load 15 25 35 % VCEH CE/SS ”High” Voltage Apply 1.4V (min.) to CE/SS, determine VOUT ”High” 1.4 - - V VCEL CE/SS ”Low” Voltage Same as V CEH, determine VOUT/”Low” - - 0.6 V EFFI Efficiency V CC = 5V, VOUT = 3.3V, Load = 300mA - 93 - % Rdson Rdson Condition I OUT = 300mA, VIN = 5V, VOUT = 2V - 350 450 m Ω

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 4 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated Typical Performance Characteristics Vcc vs. Operating Current Vcc vs. Quiescent Current 100 120 140 160 180 200 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Operating Current (uA) 100 120 140 160 180 200 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Quiescent Current (uA) Vcc vs. Stand-by Current Vcc vs. Frequency 0.5 1.5 2.5 3.5 4.5 5.5 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Stand-by Current (uA) 500 520 540 560 580 600 620 640 660 680 700 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Frequency (KHz) Vcc vs. Current Limit Vcc vs. R DS(ON) 0.5 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 33 . 544 . 555 . 5 Vcc (V) Current Limit (A) Current Limit Vout=2V 100 200 300 400 500 600 2.5 3 3.5 4 4.5 5 5.5 RDS(ON) (mΩ) Vcc (V)

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 5 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated Typical Performance Characteristics (Continued) Line Regulation Load Regulation -0.3 -0.2 -0.1 0.0 0.1 0.2 0.3 2 . 533 . 544 . 555 . 5 Vcc (V) V / VOUT (%) 0 100 200 300 400 500 600 700 800 Load (mA) V / VOUT (%) Typical Application Circuit 0.1uF VIN FB VCC GND 10uH AP1604A VOUT CE/SS 68uF 2.2V ~ 5.5V B240A R2 R1 0.1uF 68uF VOUT 10nF 100nF 1MΩ Vout = 1×(1 + R2 ) R1 = 100K ~ 200K

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 6 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated Marking Information (1) SOT25-5L XX : Identification code Y : Year: 0-9 M : Month: A~L X : Blank : Lead-Free G : Green XX Y M 12 3 X Part Number Package Identification Code AP1604AW SOT25-5L ER

Package Information

(1) Package Type: SOT25-5L

PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER AP1604A Rev. 2 7 of 7 OCTOBER 2006 www.diodes.com © Diodes Incorporated IMPORTANT NOTICE LIFE SUPPORT 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. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.