Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER General Description Features • • • • • • Input Voltage Range: 0.9~6V PWM/PFM Switching Control High Efficiency: 90% Oscillator Frequency: 300kHz（±15%） Stand-by Current: ISTB = 3µA（Typ.） Lead Free Finish/RoHS Compliant for Lead Free products (Note 1) Lead Free Package: SOT25 • The AP1624 is a multi-functional step-up DC/DC controller. 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. 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. Applications • • • • • Electronic Information Organizers Palmtops Cellular and Portable Phones Portable Audio Systems Various Multi-function Power Supplies Ordering Information AP1624 X X X Package W : SOT25 Note: 1. Lead-Free Packing L: Lead Free -7 : Taping RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Lead-free Device Package Code Packaging (Note 2) AP1624W W SOT25 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 Note: 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AP1624 Rev. 1 1 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Pin Descriptions Pin Assignments (TOP VIEW) EXT GND 5 4 Pin No. 1 2 Pin Function Name FB Feedback Pin VCC IC Power Supply Pin Chip Enable: CE H: Enable L: Disable GND GND Pin External N-MOSFET EXT Connection 3 4 1 2 3 FB VCC CE 5 SOT25 Block Diagram FB + + - CE AP1624 Rev. 1 VCC Phase Compensation Vref with CE - PWM/PFM Controller 2 of 7 www.diodes.com Buffer, Driver EXT PWM Comparator Ramp Wave Generator, OSC GND FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Absolute Maximum Ratings Parameter VIN Pin Voltage FB Pin Voltage CE Pin Voltage EXT Pin Voltage EXT Pin Current Operating Junction Temperature Storage Temperature Symbol VCC VFB VCE VEXT IEXT TOP TST TA = 25oC Units V V V V mA o C o C Ratings -0.3 ~ 6.5 -0.3 ~ VCC + 0.3 -0.3 ~ VCC + 0.3 -0.3 ~ VCC + 0.3 ±100 -30 ~ +105 -40 ~ +125 Electrical Characteristics VIN = 3.3V, VOUT = 5V, Load = 300 mA Parameter Symbol FB Voltage Maximum Input Voltage VFB VCC Supply Current 1 ICC1 Supply Current 2 ICC2 Stand-by Current ISTB Oscillator Frequency DCMAX PFM Duty Cycle DCPFM CE ”High” Voltage VCEH CE ”Low” Voltage VCEL AP1624 Rev. 1 No external components, CE = VIN, VFB = 1.5V No external components, CE = VIN, VFB = 0V No external components, CE = 0V, VFB = 0.5V Fosc Maximum Duty Cycle EXT Source Current EXT Sink Current Efficiency Conditions ISOURCE ISINK η No external components VCC = 5V, VFB = 0V No load Apply above 0.65Vcc (min.) to CE, Operating mode Apply under 0.2Vcc (min.) to CE, Standby mode VCE = VIN, VFB = 0V, VEXT = VCC-0.4V VCE = VIN, VFB = 2V, VEXT = 0.4V 3 of 7 www.diodes.com Min. Typ. TA = 25 oC Max. Units 1.205 6 1.23 - 1.255 - V V - 50 100 µA - 100 200 µA - 3 - µA 200 300 350 KHz 80 - - % 15 25 35 % 0.65 - - *Vcc - - 0.20 *Vcc - 40 70 90 - mA mA % FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs 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 100K CE 470µ 0.1 µ 0.1µ R1 NMOS AF2302 EXT GND 470µ FB 0.1µ R2 0.1 µ VOUT = 1.23 × (1+ R1 R2 ), R2 = 10K ~ 20K (2) LV Circuit 0.9V~2.5 VIV L Schottky Diode 3.3V V OU CB N NPN RB T EX T C CP 100K CE GND FB 4 £g 7 220K VC 0.1 £g 130K 4 £g 7 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 AP1624 Rev. 1 CE ZD 5V GND FB 0.1 µ 4 of 7 www.diodes.com 0.1µ 470 µ 18K FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs 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 4.95 12.3 4.9 4.85 12.1 Vout (V) Vout (V) 12.2 12 11.9 11.8 4.6 11.5 0 400 600 Load (mA) 800 0 1000 200 400 600 800 1000 1200 Load (mA) AP1624 Line Regulation AP1624 Temperature vs. Vout 10.0 Vcc=3.3V,Vout=5V Vcc=5V, Iout=300mA 9.8 5.3 9.6 5.2 9.4 5.1 9.2 Vout (V) Vout (V) 200 9.0 5 8.8 4.9 4.8 8.6 4.7 8.4 4.6 8.2 4.5 8.0 2.5 3 Vcc (V) 3.5 -50 4 0 25 50 o 75 100 AP1624 Vcc vs. Frequency 410 Vcc = 3.3V 340 -25 Temperature ( C) AP1624 Load vs. Frequency 350 380 330 320 Frequency (KHz) Frequency (KHz) 4.75 4.65 11.6 5.4 4.8 4.7 11.7 5.5 Vcc=3.3V,Vout=5V 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 Load (A) AP1624 Rev. 1 5 of 7 www.diodes.com 2.5 3 3.5 4 Vcc (V) 4.5 5 5.5 FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Typical Performance Characteristics ( Continued ) 500 400 Frequency (KHz) Vcc=5V, Vout=12V 90 Efficiency (%) AP1624 Temperature vs. Frequency AP1624 Load vs. Efficiency 100 Vcc=3.3V, Vout=5V 80 70 300 200 100 0 -50 60 0 0.2 0.4 0.6 Load (A) 0.8 1 1.2 0 25 50 75 100 Temperature (oC) AP1624 Vcc vs. Supply Current 210 -25 100 No Outside Circuit, V FB=1.5V AP1624 Temperature vs. Efficiency Vcc=5V,Vout=12V, Iout=300mA 90 150 Efficiency(%) Supply Current (uA) 180 120 90 60 80 70 30 60 -50 0 1.5 2.5 3.5 Vcc (V) 4.5 5.5 -25 0 25 50 Temperature (oC) 75 100 Marking Information 4 7 5 XX : Identification code Y : Year: 0-9 M : Month: A~L XX Y M 2 1 Part Number Package AP1624 SOT25 3 Identification Code EQ SOT25 AP1624 Rev. 1 6 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Package Information ( unit: mm ) Package Type: SOT25 IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AP1624 Rev. 1 7 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated