AP1624 ANACHIP | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
PWM/PFM Dual Mode Step-up DC/DC Controller 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. R e v . 1 . 1 D ec.23, 2004 Features - 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 Applications - Electronic Information Organizers - Palmtops - Cellular and portable phones - Portable Audio Systems - Various Multi-function Power Supplies 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 （V OUT）is programmable with 1.23V 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 3µA. Pin Assignment 1 32 5 4 FB V CC EXT CE GND SOT23-5 (TOP VIEW) Pin Descriptions Pin No. Pin Name Function
1 FB Feedback pin
2 V CC IC Power Supply pin
Chip Enable: H: Enable L: Disable
4 GND GND pin
5 EXT External N-MOSFET Connection
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Ordering Information AP1624 X X W : SOT23-5 Packing A : Taping Package Block Diagrams Phase Compensation Vref with CE PWM/PFM Controller Ramp Wave Generator, OSC Buffer, Driver FB CE GND EXT VCC PWM Comparator Absolute Maximum Ratings T a = 2 5 oC Parameter Symbol Ratings Units VIN Pin Voltage V CC -0.3 ~ 7 V FB Pin Voltage V FB - 0 . 3 ~ V CC+0.3 V CE Pin Voltage V CE - 0 . 3 ~ V CC+0.3 V EXT Pin Voltage V EXT - 0 . 3 ~ V CC+0.3 V EXT Pin Current I EXT ±100 mA Continuous Total Power Dissipation Pd 250 mW Operating Ambient Temperature Topr -30 ~ +80 oC Storage Temperature Tstg -40 ~ +125 oC
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Electrical Characteristics A P 1 6 2 4 （VIN=3.3V, VOUT＝5V, Load=300mA） T a = 2 5 oC Parameter Symbol Conditions Min. Typ. Max. Units FB Voltage V FB 1.205 1.23 1.255 V Maximum Input Voltage V CC 6 - - V Supply Current 1 I CC1 No external components, CE=VIN, VFB=1.5V - 50 100 µA Supply Current 2 I CC2 No external components, CE=VIN, VFB=0V - 100 200 µA Stand-by Current I STB No external components, CE=0V, VFB=0.5V - 3 - µA Oscillator Frequency Fosc 255 300 345 kHz Maximum Duty Ratio MAXDTY No external components VCC=5V, VFB=0V 80 - - % PFM Duty Ratio PFMDTY No load 15 25 35 % CE ”High” Voltage V CEH Apply above 0.65Vcc (min.) to CE, Operating mode 0.65 - - *Vcc CE ”Low” Voltage V CEL Apply under 0.2Vcc (min.) to CE, Standby mode - - 0.20 *Vcc EXT Source Current I SOURCE V CE=VIN, VFB=0V, VEXT=VCC-0.4V - 40 - mA EXT Sink Current I SINK V CE=VIN, VFB=2V, VEXT=0.4V - 70 - mA Efficiency EFFI - 90 - %
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Typical Application Circuit (1) Normal Circuit R1NMOS AF2302 2.5V~5.5V EXT CE FB GND VCC SS24010 H VIN 100K 0.1 R2 VOUT µ 470µ 470µ µ 0.1µ 100 0.1µ 0.1µ VOUT =1.23 × (1+ R1 ), R2=10K ~ 20K (2) LV Circuit 220K 0.9V~2.5V EXT CE FB GND VCC Schottky Diode 0.1 130K CP 3.3V 47µ 47µ µ L 100K NPN CB RB VOUTVIN RB=Adjust according to load and Tr.hFE levels CB ≤ 1/(2π×RB ×FOSC ×0.7) (3) HV Circuit 330KFDS6612 Above to 5V EXT CE FB GND VCC SS24010 H VIN 100K 0.1 VOUT µ 470µ 0.1µ 470µ µ 0.1µ R 24V/1A ZD 5V 18K
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Typical Performance Characteristics AP1624 Load Regulation 11.5 11.6 11.7 11.8 11.9 12.1 12.2 12.3 12.4 12.5 0 200 400 600 800 1000 Load (mA) Vout (V) Vcc=5V,Vout=12V AP1624 Load Regulation 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 0 200 400 600 800 1000 1200 Load (mA) Vout (V) Vcc=3.3V,Vout=5V AP1624 Line Regulation 4.5 4.6 4.7 4.8 4.9 5.1 5.2 5.3 5.4 5.5 2.5 3 3.5 4 Vcc (V) Vout (V) Vcc=3.3V,Vout=5V 8.0 8.2 8.4 8.6 8.8 9.0 9.2 9.4 9.6 9.8 10.0 -50 -25 0 25 50 75 100 Temperature (oC) Vout (V) AP1624 Temperature v.s. Vout Vcc=5V, Iout=300mA 250 260 270 280 290 300 310 320 330 340 350 AP1624 Load v.s. Frequency Vcc = 3.3V Frequency (KHz) Load (A) AP1624 Vcc v.s. Frequency 200 230 260 290 320 350 380 410 2.5 3 3.5 4 4.5 5 5.5 Vcc (V) Frequency (KHz)
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Typical Performance Characteristics (Continued) 100 Load (A) Efficiency (%) AP1624 Load v.s. Efficiency Vcc=3.3V, Vout=5V Vcc=5V, Vout=12V 100 200 300 400 500 -50 -25 0 25 50 75 100 Temperature ( oC) Frequency (KHz) AP1624 Temperature v.s. Frequency 120 150 180 210 AP1624 Vcc v.s. Supply Vcc (V) Supply Current (uA) No Outside Circuit, VFB=1.5V 100 -50 -25 0 25 50 75 100 Temperature (oC) Efficiency(%) AP1624 Temperature v.s. Efficiency Vcc=5V,Vout=12V, Iout=300mA Marking Information 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 AP1624 SOT23-5 EQ
PWM/PFM Dual Mode Step-up DC/DC Controller Anachip Corp. www.anachip.com.tw R e v . 1 . 1 D ec.23, 2004 Package Information 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