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| AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Features - Input Voltage Range: 0.9~6V - PWM/PFM Switching Control - High Efficiency: 90% - Oscillator Frequency: 300kHz15% - Stand-by Current: ISTB=3A.Typ. - Pb-Free Package: SOT23-5 General Descriptions The AP1624 is multi-functional step-up DC/DC controllers. Large output current is possible using an externally connected N channel MOSFET, coil, and diode. Output voltage VOUT programmable with 1.23V is of standard voltage supply internal, and using externally connected components, output voltage FB can be set up at will. With a 300KHz switching frequency, the size of the external components can be reduced. Control switches from PFM to PWM during light loads with the AP1624 PFM/PWM switchable and the series is highly efficient from light loads to large output currents. During stand-by time CE pin "Low", current consumption is reduced to 3A. Applications - Electronic Information Organizers - Palmtops - Cellular and portable phones - Portable Audio Systems - Various Multi-function Power Supplies Pin Assignment (TOP VIEW) EXT 5 GND 4 Pin Descriptions Pin No. 1 2 3 4 5 1 FB 2 VCC SOT23-5 3 CE Pin Function Name FB Feedback pin VCC IC Power Supply pin Chip Enable: CE H: Enable L: Disable GND GND pin EXT External N-MOSFET Connection 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 Dec.23, 2004 1/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Ordering Information AP1624 X X Package W : SOT23-5 Packing A : Taping Block Diagrams FB Phase Compensation VCC + - + PWM Comparator Ramp Wave Generator, OSC Buffer, Driver EXT CE Vref with CE PWM/PFM Controller GND Absolute Maximum Ratings Parameter VIN Pin Voltage FB Pin Voltage CE Pin Voltage EXT Pin Voltage EXT Pin Current Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature Symbol VCC VFB VCE VEXT IEXT Pd Topr Tstg Ratings -0.3 ~ 7 -0.3 ~ VCC+0.3 -0.3 ~ VCC+0.3 -0.3 ~ VCC+0.3 100 250 -30 ~ +80 -40 ~ +125 Ta=25oC Units V V V V mA mW o o C C Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 2/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Electrical Characteristics AP1624 Parameter FB Voltage Maximum Input Voltage Supply Current 1 Supply Current 2 Stand-by Current Oscillator Frequency Maximum Duty Ratio PFM Duty Ratio CE "High" Voltage CE "Low" Voltage EXT Source Current EXT Sink Current Efficiency VIN=3.3V, VOUT5V, Load=300mA Ta=25 oC Min. 1.205 6 Typ. 1.23 50 100 3 300 25 40 70 90 Max. 1.255 100 200 345 35 0.20 Units V V A A A kHz % % *Vcc *Vcc mA mA % Symbol VFB VCC ICC1 ICC2 ISTB Fosc Conditions No external components, CE=VIN, VFB=1.5V No external components, CE=VIN, VFB=0V No external components, CE=0V, VFB=0.5V 255 80 15 0.65 - No external components MAXDTY VCC=5V, VFB=0V PFMDTY No load Apply above 0.65Vcc (min.) to CE, VCEH Operating mode Apply under 0.2Vcc (min.) to CE, VCEL Standby mode ISOURCE VCE=VIN, VFB=0V, VEXT=VCC-0.4V ISINK VCE=VIN, VFB=2V, VEXT=0.4V EFFI Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 3/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Typical Application Circuit (1) Normal Circuit 2.5V~5.5V VIN 100 VCC 100K 470 0.1 0.1 0.1 CE GND FB EXT NMOS AF2302 R1 10 H SS240 VOUT 470 R2 0.1 VOUT =1.23 (2) LV Circuit 0.9V~2.5V VIN L CB NPN RB x (1+ R1 R2 ), R2=10K ~ 20K Schottky Diode 3.3V VOUT 220K 100K CP EXT GND FB VCC CE 0.1 47 130K 47 RB=Adjust according to load and Tr.hFE levels CB 1/(2 x RB x FOSC x 0.7) (3) HV Circuit Above to 5V VIN R VCC 100K 0.1 470 ZD 5V 0.1 CE GND FB 18K 0.1 470 EXT FDS6612 330K 10 H SS240 24V/1A VOUT Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 4/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Typical Performance Characteristics 12.5 12.4 12.3 12.2 12.1 11.9 11.8 11.7 11.6 11.5 0 200 400 600 800 1000 AP1624 Load Regulation Vcc=5V,Vout=12V AP1624 Load Regulation 5 4.95 4.9 4.85 Vcc=3.3V,Vout=5V Vout (V) Vout (V) 12 4.8 4.75 4.7 4.65 4.6 0 200 400 600 800 1000 1200 Load (mA) Load (mA) 5.5 5.4 5.3 5.2 5.1 5 4.9 4.8 4.7 4.6 4.5 AP1624 Line Regulation Vcc=3.3V,Vout=5V 10.0 9.8 9.6 9.4 9.2 9.0 8.8 8.6 8.4 8.2 8.0 AP1624 Temperature v.s. Vout Vcc=5V, Iout=300mA Vout (V) Vout (V) 2.5 3 Vcc (V) 3.5 4 -50 -25 0 25 Temperature ( C) o 50 75 100 350 340 330 310 300 290 280 270 260 250 0 AP1624 Load v.s. Frequency Vcc = 3.3V 410 380 AP1624 Vcc v.s. Frequency Frequency (KHz) Frequency (KHz) 0.2 0.4 0.6 0.8 1 1.2 320 350 320 290 260 230 200 Load (A) 2.5 3 3.5 Vcc (V) 4 4.5 5 5.5 Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 5/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Typical Performance Characteristics (Continued) 100 AP1624 Load v.s. Efficiency Vcc=5V, Vout=12V Vcc=3.3V, Vout=5V AP1624 Temperature v.s. Frequency 500 90 Frequency (KHz) 400 300 200 100 0 -50 Efficiency (%) 80 70 60 0 0.2 0.4 Load (A) 0.6 0.8 1 1.2 -25 0 25 50 75 100 Temperature (oC) 210 180 AP1624 Vcc v.s. Supply No Outside Circuit, VFB=1.5V 100 AP1624 Temperature v.s. Efficiency Vcc=5V,Vout=12V, Iout=300mA Supply Current (uA) 120 90 60 30 0 1.5 2.5 Efficiency(%) 150 90 80 70 60 Vcc (V) 3.5 4.5 5.5 -50 -25 0 25 50 Temperature ( C) o 75 100 Marking Information 5 XX Y M 4 7 Appendix XX : Identification code (See Appendix) Y : Year: 0-9 M : Month: A~L Part Number AP1624 Package SOT23-5 Identification Code EQ 1 2 SOT23-5L 3 Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 6/7 AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Package Information 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 With Plating 2 3 b b1 C C1 Gauge Plane 0.25 mm Base Metal b L L1 Symbol A A1 A2 b b1 c c1 D E E1 L L1 e e1 1 2 Dimensions In Millimeters Min. Nom. Max. 1.05 1.20 1.35 0.05 0.10 0.15 1.00 1.10 1.20 0.25 0.55 0.25 0.40 0.45 0.08 0.20 0.08 0.11 0.15 2.70 2.85 3.00 2.60 2.80 3.00 1.50 1.60 1.70 0.35 0.45 0.55 0.60 Ref. 0.95 Bsc. 1.90 Bsc. 5o 10o 0o o o 3 5 7o 6o 8o 10o Dimensions In Inches Min. Nom. Max. 0.041 0.047 0.053 0.002 0.004 0.006 0.039 0.043 0.047 0.010 0.022 0.010 0.016 0.018 0.003 0.008 0.003 0.004 0.006 0.106 0.112 0.118 0.102 0.110 0.118 0.059 0.063 0.067 0.014 0.018 0.022 0.024 Ref. 0.037 Bsc. 0.075 Bsc. 0o 5o 10o o o 3 5 7o 6o 8o 10o Anachip Corp. www.anachip.com.tw Rev.1.1 Dec.23, 2004 7/7 |
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