AP1624 DIODES | Alldatasheet

Document overview

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Technical content

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 1 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Lead-free

  • 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（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.

Applications

  • Electronic Information Organizers
  • Palmtops
  • Cellular and Portable Phones
  • Portable Audio Systems
  • Various Multi-function Power Supplies AP1624 X X X W : SOT25 Packing -7 : Taping Package Lead-Free L: Lead Free 7” Tape and Reel Device Package Code Packaging (Note 2) Quantity Part Number Suffix AP1624W W SOT25 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. Features General Description

Ordering Information

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 2 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated 1 32 5 4 FB V CC EXT CE GND SOT25 (TOP VIEW) 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

Generator, OSC Buffer, Driver FB CE GND EXT VCC PWM Comparator Pin Assignments Pin Descriptions Block Diagram Not Recommended for New Designs

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 3 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Absolute Maximum Ratings TA = 25oC P a r a m e t e r Symbol Ratings Units VIN Pin Voltage VCC -0.3 ~ 6.5 V FB Pin Voltage VFB -0.3 ~ V CC + 0.3 V CE Pin Voltage VCE -0.3 ~ V CC + 0.3 V EXT Pin Voltage VEXT -0.3 ~ V CC + 0.3 V EXT Pin Current IEXT ±100 mA Operating Junction Temperature T OP -30 ~ +105 oC Storage Temperature TST -40 ~ +125 oC

Electrical Characteristics

V IN = 3.3V, VOUT = 5V, Load = 300 mA T A = 25 oC Parameter Symbol Conditions Min. Typ. Max. Units FB Voltage VFB 1.205 1.23 1.255 V Maximum Input Voltage V CC 6 - - V Supply Current 1 ICC1 No external components, CE = VIN, VFB = 1.5V - 50 100 µA Supply Current 2 ICC2 No external components, CE = V IN, VFB = 0V - 100 200 µA Stand-by Current ISTB No external components, CE = 0V, VFB = 0.5V - 3 - µA Oscillator Frequency Fosc 200 300 350 KHz Maximum Duty Cycle DC MAX No external components V CC = 5V, VFB = 0V 80 - - % PFM Duty Cycle DC PFM 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 η - 90 - % Not Recommended for New Designs

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 4 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated 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~2.5 V EX T CE FB GND V C C Schottky Diode 0.1 130K CP 3.3V 7 £g 7 £g L 100K NPN CB RB V OU T V I N RB = Adjust according to load and Tr. hFE levels CB ≤ 1 / ( 2π × R B × F OSC × 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 Not Recommended for New Designs

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 5 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated 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 vs. Vout Vcc=5V, Iout=300mA 250 260 270 280 290 300 310 320 330 340 350 AP1624 Load vs. Frequency Vcc = 3.3V Frequency (KHz) Load (A) AP1624 Vcc vs. Frequency 200 230 260 290 320 350 380 410 2 . 533 . 544 . 555 . 5 Vcc (V) Frequency (KHz) Not Recommended for New Designs

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 6 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Typical Performance Characteristics ( Continued ) 100 Load (A) Efficiency (%) AP1624 Load vs. 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 vs. Frequency 120 150 180 210 AP1624 Vcc vs. Supply Current Vcc (V) Supply Current (uA) No Outs ide Circ uit, VFB=1.5V 100 -50 -25 0 25 50 75 100 Temperature (oC) Efficiency(%) AP1624 Temperature vs. Efficiency Vcc=5V,Vout=12V, Iout=300mA Marking Information XX : Identification code Y : Year: 0-9 M : Month: A~L SOT25 XX Y M 1 2 3 Part Number Package Identification Code AP1624 SOT25 EQ Not Recommended for New Designs

PWM/PFM DUAL MODE STEP-UP DC/DC CONTROLLER AP1624 Rev. 1 7 o f 7 FEBRUARY 2007 www.diodes.com © Diodes Incorporated Package Information ( unit: mm ) IMPORTANT NOTICE LIFE SUPPORT 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. 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. Not Recommended for New Designs