AP1624 PWM/PFM Dual Mode Step-up DC/DC Controller Features General Descriptions - Input Voltage Range: 0.9~6V - PWM/PFM Switching Control - High Efficiency: 90% - Oscillator Frequency: 300kHz（±15%） - Stand-by Current: ISTB=3µA.（Typ.） - Pb-Free Package: SOT23-5 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）is programmable with 1.23V of standard voltage supply internal, and using externally connected components, output voltage （FB） can be set up at will. Applications 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. - Electronic Information Organizers - Palmtops - Cellular and portable phones - Portable Audio Systems - Various Multi-function Power Supplies During stand-by time （CE pin “Low”）, current consumption is reduced to 3µA. Pin Assignment Pin Descriptions (TOP VIEW) EXT GND 5 4 Pin No. 1 2 3 1 2 3 FB VCC CE 4 5 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 SOT23-5 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 + + - CE VCC Phase Compensation - Vref with CE PWM/PFM Controller Buffer, Driver PWM Comparator Ramp Wave Generator, OSC 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 EXT GND Ta=25oC Units V V V V mA Symbol VCC VFB VCE VEXT IEXT Ratings -0.3 ~ 7 -0.3 ~ VCC+0.3 -0.3 ~ VCC+0.3 -0.3 ~ VCC+0.3 ±100 Pd 250 Topr -30 ~ +80 o -40 ~ +125 o Tstg mW 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 Symbol FB Voltage Maximum Input Voltage VFB VCC Supply Current 1 ICC1 Supply Current 2 ICC2 Stand-by Current ISTB Oscillator Frequency Maximum Duty Ratio PFM Duty Ratio CE ”High” Voltage CE ”Low” Voltage EXT Source Current EXT Sink Current Efficiency Ta=25 oC （VIN=3.3V, VOUT＝5V, Load=300mA） Conditions No external components, CE=VIN, VFB=1.5V No external components, CE=VIN, VFB=0V No external components, CE=0V, VFB=0.5V Fosc 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 Min. Typ. Max. Units 1.205 6 1.23 - 1.255 - V V - 50 100 µA - 100 200 µA - 3 - µA 255 300 345 kHz 80 - - % 15 25 35 % 0.65 - - *Vcc - - 0.20 *Vcc - 40 70 90 - mA mA % 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 10 µH 2.5V~5.5V VIN SS240 VOUT 100 VCC EXT 100K R1 NMOS AF2302 CE 470µ 0.1 µ GND 470µ FB 0.1µ R2 0.1 µ 0.1µ VOUT =1.23 × (1+ R1 R2 ), R2=10K ~ 20K (2) LV Circuit L 0.9V~2.5V VIN Schottky Diode 3.3V VOUT CB NPN 220K VCC EXT RB CP 100K CE GND FB 47µ 47µ 0.1 µ 130K RB=Adjust according to load and Tr.hFE levels CB ≤ 1/(2π × RB × FOSC × 0.7) (3) HV Circuit 10 µH Above to 5V VIN 24V/1A SS240 VOUT R VCC EXT FDS6612 330K 100K 0.1 µ 470µ CE ZD 5V GND FB 0.1 µ 0.1µ 470 µ 18K 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 AP1624 Load Regulation AP1624 Load Regulation 12.5 5 Vcc=5V,Vout=12V 12.4 12.3 4.9 12.2 4.85 Vout (V) 12.1 Vout (V) 12 11.9 11.8 11.7 0 200 400 600 Load (mA) 800 0 1000 AP1624 Line Regulation 5.1 400 600 Load (mA) 800 1000 1200 Vcc=5V, Iout=300mA Vout (V) Vout (V) 5.2 200 AP1624 Temperature v.s. Vout 10.0 9.8 9.6 9.4 9.2 9.0 8.8 8.6 8.4 8.2 8.0 Vcc=3.3V,Vout=5V 5.3 5 4.9 4.8 4.7 4.6 4.5 2.5 3 Vcc (V) 3.5 -50 4 0 25 50 o 75 100 AP1624 Vcc v.s. Frequency 410 Vcc = 3.3V 340 -25 Temperature ( C) AP1624 Load v.s. Frequency 350 380 330 320 Frequency (KHz) Frequency (KHz) 4.7 4.6 11.5 5.4 4.8 4.75 4.65 11.6 5.5 Vcc=3.3V,Vout=5V 4.95 310 300 290 280 270 350 320 290 260 230 260 250 200 0 0.2 0.4 0.6 0.8 1 1.2 2.5 Load (A) 3 3.5 4 Vcc (V) 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) 500 Frequency (KHz) Vcc=5V, Vout=12V 90 Efficiency (%) AP1624 Temperature v.s. Frequency AP1624 Load v.s. Efficiency 100 Vcc=3.3V, Vout=5V 80 70 210 0.2 0.4 0.6 Load (A) 0.8 1 300 200 100 0 -50 60 0 400 1.2 -25 0 25 50 75 100 Temperature (oC) AP1624 Vcc v.s. Supply 100 No Outside Circuit, VFB=1.5V AP1624 Temperature v.s. Efficiency Vcc=5V,Vout=12V, Iout=300mA 90 150 Efficiency(%) Supply Current (uA) 180 120 90 60 80 70 30 60 0 1.5 2.5 3.5 Vcc (V) 4.5 5.5 -50 -25 0 25 50 o 75 100 Temperature ( C) Marking Information Appendix 4 7 5 XX : Identification code (See Appendix) Y : Year: 0-9 M : Month: A~L XX Y M 1 2 Part Number Package AP1624 SOT23-5 Identification Code EQ 3 SOT23-5L 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 θ1(4x) 4 5 E1 E A 0.10 C 5x A2 Seating Plane A1 1 2 θ 2(4x) 3 b e With Plating b1 C C1 Gauge Plane 0.25 mm θ Base Metal L b Symbol A A1 A2 b b1 c c1 D E E1 L L1 e e1 θ θ1 θ2 L1 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