AP1624

Not Recommended for New Designs 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 AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER General Description 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 L: Lead Free Packing -7 : Taping RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device Lead-free Package Code W Packaging (Note 2) SOT25 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 AP1624W 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 Pin Assignments (TOP VIEW) EXT 5 GND 4 AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Pin Descriptions Pin No. 1 2 3 4 1 FB 2 VCC SOT25 3 CE 5 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 Block Diagram FB Phase Compensation VCC + - + PWM Comparator Ramp Wave Generator, OSC Buffer, Driver EXT CE Vref with CE PWM/PFM Controller GND AP1624 Rev. 1 2 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Absolute Maximum Ratings TA = 25oC Units V V V V mA o C o C 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 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 Supply Current 1 Supply Current 2 Stand-by Current Oscillator Frequency Maximum Duty Cycle PFM Duty Cycle CE ”High” Voltage CE ”Low” Voltage EXT Source Current EXT Sink Current Efficiency VFB VCC ICC1 ICC2 ISTB Fosc DCMAX DCPFM VCEH VCEL 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 No external components, CE = VIN, VFB = 1.5V No external components, CE = VIN, VFB = 0V No external components, CE = 0V, VFB = 0.5V TA = 25 oC Max. Units 1.255 100 200 350 35 0.20 V V µA µA µA KHz % % *Vcc *Vcc mA mA % Conditions Min. 1.205 6 200 80 15 0.65 - Typ. 1.23 50 100 3 300 25 40 70 90 AP1624 Rev. 1 3 of 7 www.diodes.com 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 2.5V~5.5V VIN 100 VCC 100K 470µ 0.1 µ 0.1µ 0.1 µ CE GND FB EXT NMOS AF2302 R1 10 µH SS240 VOUT 470µ R2 0.1µ VOUT = 1.23 × (1+ R1 R2 ), R2 = 10K ~ 20K (2) LV Circuit 0.9V~2.5 VIV N L CB NPN RB Schottky Diode 3.3V V OU T EX T GND VC C 220K 100K CP CE FB 0.1 £g 130K 4 £g 7 4 £g 7 RB = Adjust according to load and Tr. hFE levels CB ≤ 1 / ( 2π × RB × FOSC × 0.7 ) (3) HV Circuit Above to 5V VIN R VCC 100K 0.1 µ 470µ ZD 5V 0.1 µ CE GND FB 18K 0.1µ 470 µ EXT FDS6612 330K 10 µH SS240 24V/1A VOUT AP1624 Rev. 1 4 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Typical Performance Characteristics 12.5 12.4 12.3 12.2 12.1 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 11.9 11.8 11.7 11.6 11.5 0 200 400 600 800 1000 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 AP1624 Temperature vs. Vout Vcc=5V, Iout=300mA Vout (V) Vout (V) 9.0 8.8 8.6 8.4 8.2 8.0 2.5 3 Vcc (V) 3.5 4 -50 -25 0 25 Temperature ( C) o 50 75 100 350 340 330 AP1624 Load vs. Frequency Vcc = 3.3V 410 380 AP1624 Vcc vs. Frequency Frequency (KHz) 310 300 290 280 270 260 250 0 0.2 0.4 0.6 0.8 1 1.2 Frequency (KHz) 320 350 320 290 260 230 200 Load (A) 2.5 3 3.5 Vcc (V) 4 4.5 5 5.5 AP1624 Rev. 1 5 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER Typical Performance Characteristics ( Continued ) AP1624 Temperature vs. Frequency 500 100 AP1624 Load vs. Efficiency Vcc=5V, Vout=12V Vcc=3.3V, Vout=5V 90 Efficiency (%) Frequency (KHz) 400 300 200 100 0 -50 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 vs. Supply Current No Outside Circuit, V FB=1.5V 100 AP1624 Temperature vs. Efficiency V cc=5V,Vout=12V, Iout=300mA Supply Current (uA) 120 90 60 30 0 1.5 2.5 Efficiency(%) 150 90 80 70 Vcc (V) 3.5 4.5 5.5 60 -50 -25 Temperature (oC) 0 25 50 75 100 Marking Information 5 XX Y M 4 7 XX : Identification code Y : Year: 0-9 M : Month: A~L 3 Part Number AP1624 Package SOT25 1 2 SOT25 Identification Code EQ AP1624 Rev. 1 6 of 7 www.diodes.com FEBRUARY 2007 © Diodes Incorporated Not Recommended for New Designs Package Information ( unit: mm ) Package Type: SOT25 AP1624 PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER 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