AP1604 ANACHIP | Alldatasheet

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PWM/PFM Dual Mode Step-down DC/DC Converter 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 „ 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: I STB=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) „ Applications

  • Electronic Information Organizers
  • Palmtops
  • Cellular and portable phones
  • Portable Audio Systems
  • Various Multi-function Power Supplies „ 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. „ Pin Assignment 1 32 5 4 CE/SS VOUT VCCGND SOT23-5 FB (Top View) AP1604A SON-6 3 4 GNDCE FB VOUT VCCSVCC „ Pin Descriptions Pin Name Function VOUT Output Voltage VCC Input Supply GND Ground CE/SS Chip Enable / Soft Start FB Feedback pin SVCC Signal Power for SON only

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ Ordering Information AP1604 X X X W: SOT23-5 SN: SON-6 (3*3*0.8mm) Packing A : Taping Package A: AP1604A Version „ Block Diagrams 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 „ Absolute Maximum Ratings T a = 2 5 ° 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

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ 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 „ Typical Performance Characteristics Vcc v.s. Operating Current Vcc v.s. 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 . 533 . 544 . 555 . 5 Vcc (V) Quiescent Current (uA)

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ Typical Performance Characteristics (Continued) Vcc v.s. Stand-by Current Vcc v.s. 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 . 533 . 544 . 555 . 5 Vcc (V) Frequency (KHz) Vcc v.s. Current Limit Vcc v.s. R DS(ON) 0.5 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 3 3.5 4 4.5 5 5.5 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) 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 (%)

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ 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 „ Marking Information (1) SOT23-5L XX : Identification code (See Appendix) Y : Year: 0-9 M : Month: A~L SOT23-5L XX Y M 12 3 Appendix Part Number Package Identification Code AP1604A SOT23-5 ER (2) SON-6L (3*3*0.8mm) Date Code Year: 0~9 Month: A~L Identification Code ( See the table ) XX XX Appendix Part Number Package Identification code AP1604A SON-6L (3*3*0.8mm) S4

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ Package Information (1) Package Type: SOT23-5L θ Gauge Plane 0.25 mm L E1 E D 123 be b C C1 Base Metal With Plating A Seating Plane 0.10 C 2(4x)θ 1(4x)θ b 0.25 - 0.55 0.010 - 0.022 c 0.08 - 0.20 0.003 - 0.008 L1 0.60 Ref. 0.024 Ref. e 0.95 Bsc. 0.037 Bsc. e1 1.90 Bsc. 0.075 Bsc. θ 0o 5 o 10 o 0 o 5 o 10 o θ1 3o 5 o 7 o 3 o 5 o 7 o θ2 6o 8 o 10 o 6 o 8 o 10 o

PWM/PFM Dual Mode Step-down DC/DC Converter Anachip Corp. www.anachip.com.tw Rev.1.1 Jun. 27, 2005 „ Package Information (Continued) (2) SON-6L (3×3×0.8mm) E E1 L C0.10 SEATING PLANE Pin1 ID Area 2xC 0.25 A3 0.203 REF. 0.008 REF e 0.95 BSC. 0.037 BSC. e1 1.90 BSC. 0.075 BSC. y 0.00 - 0.08 0.000 - 0.003