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AP1604 Dataheets PDF



Part Number AP1604
Manufacturers Anachip
Logo Anachip
Description PWM/PFM Dual Mode Step-down DC/DC Converter
Datasheet AP1604 DatasheetAP1604 Datasheet (PDF)

AP1604 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 - Pb-Free Package: SOT23-5, SON-6(3×3×0.8mm) „ General Descriptions The AP1604 series are multi-functional step-down DC/DC converters with built-in spe.

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AP1604 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 - Pb-Free Package: SOT23-5, SON-6(3×3×0.8mm) „ General Descriptions 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. „ Applications ● Electronic Information Organizers ● Palmtops ● Cellular and portable phones ● Portable Audio Systems ● Various Multi-function Power Supplies „ Pin Assignment (Top View) FB 5 CE/SS 4 „ Pin Descriptions Pin Name VOUT VCC GND CE/SS FB SVCC Function Output Voltage Input Supply Ground Chip Enable / Soft Start Feedback pin Signal Power for SON only AP1604A 1 VOUT 2 GND SOT23-5 3 VCC FB 1 SVCC 2 CE 3 SON-6 6 5 V OUT VCC 4 GND This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev.1.1 Jun. 27, 2005 1/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter „ Ordering Information AP1604 X X X Version A: AP1604A Package Packing A : Taping W: SOT23-5 SN: SON-6 (3*3*0.8mm) „ Block Diagrams 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 „ Absolute Maximum Ratings Symbol VCC/SVCC VOUT VFB VCE/SS Pd Topr Tstg Parameter VIN Pin Voltage VOUT Pin Voltage FB Pin Voltage CE/SS Pin Voltage Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature 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 °C °C Ta=25°C Units V V V V Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 2/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter „ 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 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 VIN=2.2~5.5V, Load=10mA IOUT=10~800mA VCC, voltage required to maintain H at VUVLO VOUT ICC CE/SS=VIN, No Load No external components, ICCQ Supply Current CE/SS=VIN, VFB=1.2V No external components, ISTB Stand-by Current CE/SS=0V, VFB=0V peak current ICL Current Limit VIN=5V, VOUT=2V Fosc Oscillator Frequency Load=300mA, VIN=5V, VOUT=2V MAXDTY Maximum Duty Ratio PFMDTY PFM Duty Ratio No load Apply 1.4V (min.) to CE/SS, determine VCEH CE/SS ”High” Voltage VOUT ”High” VCEL CE/SS ”Low” Voltage Same as VCEH, determine VOUT/”Low” EFFI Efficiency VCC=5V, VOUT=3.3V, Load=300mA Rdson Rdson Condition IOUT=300mA, VIN=5V, VOUT=2V „ Typical Performance Characteristics Vcc v.s. Operating Current 200 180 160 140 120 100 80 60 40 20 0 2.5 3 3.5 4 4.5 5 5.5 Vcc v.s. Quiescent Current 200 180 160 140 120 100 80 60 40 20 0 2.5 3 3.5 4 4.5 5 5.5 Operating Current (uA) Vcc (V) Quiescent Current (uA) Vcc (V) Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 3/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter „ Typical Performance Characteristics (Continued) Vcc v.s. 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 3 3.5 4 4.5 5 5.5 Vcc v.s. Frequency Stand-by Current (uA) Frequency (KHz) Vcc (V) Vcc (V) Vcc v.s. Current Limit 1.4 1.3 1.2 Vcc v.s. 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 1.1 400 300 200 100 0 3.5 4 4.5 5 5.5 2.5 3 3.5 Vcc (V) Vcc (V) 4 4.5 5 5.5 Line Regulation 0.3 0.2 0.1 3 2 1 Load Regulation 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 Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 4/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter „ T.


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