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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=2A. (Typ.) - Soft-start time set-up externally type possible - Current limit and thermal shutdown protection - Pb-Free Package: SOT23-5, SON-6(3x3x0.8mm) 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=25C 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, VOUT2V, Load=300mA, Ta=25C Sym. VFB VIN Parameter FB Input Voltage Line Regulation Load Regulation UVLO Voltagemin. 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 A A A mA kHz % % V V % m 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) (m) 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 Typical Application Circuit 2.2V ~ 5.5V VIN 1M 68uF 0.1uF 10uH VOUT B240A FB R1 0.1uF 68uF R2 VCC AP1604A CE/SS GND 10nF 100nF ~ VOUT Vout = 1 x (1 + R2 R1 R1=100K ~ 200K ) Marking Information (1) SOT23-5L 5 XX Y M 4 Appendix XX : Identification code (See Appendix) Y : Year: 0-9 M : Month: A~L 7 Part Number Package AP1604A SOT23-5 Identification Code ER 1 2 SOT23-5L 3 (2) SON-6L (3*3*0.8mm) Appendix Part Number Package Identification code XX XX Identification Code ( See the table ) Date Code Year: 0~9 Month: A~L AP1604A SON-6L (3*3*0.8mm) S4 Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 5/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter Package Information (1) Package Type: SOT23-5L D e1 1(4x) 5 4 0.10 C 5x Seating Plane A1 2(4x) E1 E A A2 1 e 2 3 b With Plating b1 C C1 Gauge Plane 0.25 mm Base Metal b L L1 Symbol Dimensions In Millimeters Min. Nom. Max. Dimensions In Inches Min. Nom. Max. A A1 A2 b b1 c c1 D E E1 L L1 e e1 1 2 1.05 0.05 1.00 0.25 0.25 0.08 0.08 2.70 2.60 1.50 0.35 1.20 0.10 1.10 0.40 0.11 2.85 2.80 1.60 0.45 0.60 Ref. 0.95 Bsc. 1.90 Bsc. 1.35 0.15 1.20 0.55 0.45 0.20 0.15 3.00 3.00 1.70 0.55 0.041 0.002 0.039 0.010 0.010 0.003 0.003 0.106 0.102 0.059 0.014 0.047 0.004 0.043 0.016 0.004 0.112 0.110 0.063 0.018 0.024 Ref. 0.037 Bsc. 0.075 Bsc. 0.053 0.006 0.047 0.022 0.018 0.008 0.006 0.118 0.118 0.067 0.022 0o 3 o 5o 5 o 10o 7 o 0o 3 o 5o 5 o 10o 7o 10o 6o 8o 10o 6o 8o Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 6/7 AP1604 PWM/PFM Dual Mode Step-down DC/DC Converter Package Information (Continued) (2) SON-6L (3x3x0.8mm) C 0.25 E1 2x L Pin1 ID Area E 0.10 C SEATING PLANE Symbol A A1 A3 b D D1 E E1 L e e1 y Dimensions In Millimeters Min. Nom. Max. 0.70 0.75 0.80 0.00 0.02 0.05 0.203 REF. 0.30 0.40 0.45 2.90 3.00 3.10 1.90 2.10 2.30 2.90 3.00 3.10 1.30 1.50 1.70 0.30 0.40 0.50 0.95 BSC. 1.90 BSC. 0.00 0.08 Dimensions In Inches Min. Nom. Max. 0.028 0.030 0.031 0.000 0.001 0.002 0.008 REF 0.012 0.016 0.018 0.114 0.118 0.122 0.075 0.083 0.091 0.114 0.118 0.122 0.051 0.059 0.067 0.012 0.016 0.020 0.037 BSC. 0.075 BSC. 0.000 0.003 Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 7/7 |
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