AP1604AWL-7

AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Features • • • • • • • • • • 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 Lead Free Package: SOT25 SOT25: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) General Description The AP1604A 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 AP1604A 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. AP1604A 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. Applications • • • • • Electronic Information Organizers Palmtops Cellular and portable phones Portable Audio Systems Various Multi-function Power Supplies Ordering Information AP1604A W X - 7 Package W : SOT25 Lead Free L : Lead Free G : Green Packaging (Note 2) SOT25 SOT25 Packing 7 : Tape & Reel Device Lead-free Package Code W W AP1604AWL-7 AP1604AWG-7 Notes: 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 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. AP1604A Rev. 2 1 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Pin Assignment (Top View) FB 5 CE/SS 4 AP1604A 1 V OUT 2 GND 3 VCC SOT25 Pin Description Pin Name VOUT GND VCC CE/SS FB Description Output Voltage Ground Input Supply Chip Enable / Soft Start Feedback pin Block Diagram SVCC FB Phase Compensation VCC Current Limit + ERR AMP Soft Start + VOUT PWM Comparator CE/SS Vref with CE PWM/PFM Controller Ramp Wave Generator, OSC GND AP1604A Rev. 2 2 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Absolute Maximum Ratings Symbol VCC/SVCC VOUT VFB VCE/SS PD TOP TST VIN Pin Voltage VOUT Pin Voltage FB Pin Voltage CE/SS Pin Voltage (TA=25°C) Parameter Ratings -0.3 ~ 6.5 -0.3 ~ VIN+0.3 -0.3 ~ VIN+0.3 -0.3 ~ VIN+0.3 Internal limited -25 ~ +80 -40 ~ +125 Units V V V V °C °C Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature Range Electrical Characteristics VIN = 5V, VOUT＝2V, Load = 300mA, TA = 25°C Sym. VFB VIN Parameter FB Input Voltage Line Regulation Load Regulation UVLO Voltage（min. operating voltage） Operating Current Supply Current Stand-by Current Current Limit Conditions Min 0.975 2.2 800 500 85 15 1.4 Typ. 1.0 100 90 2 1000 600 90 25 93 350 Max 1.025 5.5 0.12 1.2 2 150 120 1200 700 35 0.6 450 Units V V % % V μA μA μA mA kHz % % V V % mΩ VUVLO ICC ICCQ ISTB ICL Fosc Oscillator Frequency MAXDTY Maximum Duty Ratio PFMDTY PFM Duty Ratio VCEH VCEL EFFI Rdson CE/SS ”High” Voltage CE/SS ”Low” Voltage Efficiency Rdson Condition VIN = 2.2 ~ 5.5V, Load = 10mA IOUT = 10 ~ 800mA VCC, voltage required to maintain H at VOUT CE/SS = VIN, No Load No external components, CE/SS = VIN, VFB = 1.2V No external components, CE/SS = 0V, VFB = 0V peak current VIN = 5V, VOUT = 2V Load = 300mA, VIN = 5V, VOUT = 2V No load Apply 1.4V (min.) to CE/SS, determine VOUT ”High” Same as VCEH, determine VOUT/”Low” VCC = 5V, VOUT = 3.3V, Load = 300mA IOUT = 300mA, VIN = 5V, VOUT = 2V AP1604A Rev. 2 3 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Typical Performance Characteristics Vcc vs. Operating Current 200 180 200 180 Vcc vs. Quiescent Current Operating Current (uA) 160 140 120 100 80 60 40 20 0 2.5 3 3.5 4 4.5 5 5.5 Quiescent Current (uA) 160 140 120 100 80 60 40 20 0 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Vcc (V) Vcc vs. Stand-by Current 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 2.5 3 3.5 4 4.5 5 5.5 700 680 660 640 620 600 580 560 540 520 500 2.5 Vcc vs. Frequency Stand-by Current (uA) Frequency (KHz) 3 3.5 4 4.5 5 5.5 Vcc (V) Vcc (V) Vcc vs. Current Limit 1.4 1.3 1.2 Vcc vs. RDS(ON) 600 500 Current Limit (A) 1 0.9 0.8 0.7 0.6 0.5 3 Current Limit RDS(ON) (mΩ) Vout=2V 4.5 5 5.5 1.1 400 300 200 100 0 3.5 4 2.5 3 3.5 Vcc (V) Vcc (V) 4 4.5 5 5.5 AP1604A Rev. 2 4 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Typical Performance Characteristics Line Regulation 0.3 0.2 0.1 (Continued) Load Regulation 3 2 1 V / VOUT (%) 0.0 V / VOUT (%) 2.5 3 3.5 4 4.5 5 5.5 0 -1 -2 -3 -0.1 -0.2 -0.3 Vcc (V) 0 100 200 300 Load (mA) 400 500 600 700 800 Typical Application Circuit 2.2V ~ 5.5V VIN 1MΩ 10uH VCC AP1604A CE/SS GND 68uF 0.1uF 10nF 100nF Vout = 1 × (1 + R2 R1 ) VOUT B240A FB R1 0.1uF R2 VOUT 68uF ~ R1 = 100K ~ 200K AP1604A Rev. 2 5 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN DC/DC CONVERTER Marking Information (1) SOT25 ( Top View ) 5 4 7 XX Y W X 1 2 3 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : a~z : Lead Free A~Z : Green Package SOT25 Identification Code ER Part Number AP1604AW Package Information (1) Package Type: SOT25 (All Dimensions in mm) AP1604A Rev. 2 6 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AP1604A PWM/PFM DUAL MODE STEP-DOWN 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. 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. LIFE SUPPORT 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. AP1604A Rev. 2 7 of 7 www.diodes.com FEBRUARY 2009 © Diodes Incorporated