Page No. : 1/8 AX1509 150KHz, 2A PWM Buck DC/DC Converter 8-Lead Plastic DIP-8 Package Code: P Description The AX1509 is Monolithic IC that design for a step-down DC/DC Converter, and own the ability of driving a 2A load without additional transistor component. The output version included 3.3V, 5V, 12V and an adjustable type. It operates at a switching frequency of 150KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. • 8-Lead Plastic SOP-8 Package Code: S Features • 3.3V, 5V, 12V and adjustable • Adjustable version output voltage range: 1.25-18V • ±4% max over line and load conditions • 150KHz ±15% fixed switching frequency • TTL shutdown capability • Operating voltage can be up to 22V • Output load current: 2A • SOP-8 and DIP-8 packages • Low power standby mode • Thermal-shuntdown and current-limit protection • High efficiency • Built-in switching a transistor on chip, requires only 4 external components Applications • Simple High-efficiency step-down regulator • Positive to negative converter • On-card switching regulators Pin Connections 8 1 7 2 6 3 5 4 DS-AX1509-01 Aug, 2006 Pin1: Operating Voltage Input Pin5: Ground Pin2: Switch Output Pin6: Ground Pin3: Output Voltage Feedback Control Pin7: Ground Pin4: ON/OFF Shutdown Pin8: Ground www.Orister.com Page No. : 2/8 Pin Connections SD VIN + Current Source Bias 11.235V 25V Reference 2.5V Regulator Start Up 200mV + 220mV R + COMP Current Limit FB R2 + AMP COMP + R1=2.5K + COMP - COMP + 3A Switch Driver 150KHz OSC. Output Thermal Limit GND Absolute Maxium Rating (Note1) Symbol Value Unit Supply Voltage Parameter VCC +24 V On/Off Pin Input Voltage VSD -0.3~+18 V Feedback Pin Voltage VFB -0.3~+18 V Output Voltage to Ground VOUT -1 V Power Dissipation PD Internally Limited W Operating Temperature Topr -40~+125 o C o C Storage Temperature Tstg -65~+150 Operating Voltage VOP +4.5~+22 V Electrical Characteristics (Continued) o (Note 2) Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C Part No. AX1509-3.3 Parameter Output Voltage Efficiency AX1509-5.0 Output Voltage Efficiency AX1509-12 Output Voltage Efficiency AX1509-ADJ Output Voltage Efficiency DS-AX1509-01 Aug, 2006 Symbol VOUT η VOUT η VOUT η VOUT η Conditions 4.75V≤VIN≤22V, 0.2A≤ILOAD≤2A VIN=12V, ILOAD=2A 7V≤VIN≤22V, 0.2A≤ILOAD≤2A VIN=12V, ILOAD=2A 15V≤VIN≤22V, 0.2A≤ILOAD≤2A VIN=25V, ILOAD=2A 4.5V≤VIN≤22V, 0.2A≤ILOAD≤2A VOUT programmed for 3V VIN=12V, VOUT=3V, ILOAD=2A Min. Typ. Max. (Note3) (Note4) 3.168 3.135 3.3 - Unit 3.342 3.465 V 73 - % 4.800 4.750 5.0 5.200 5.250 V - 80 - % 11.52 11.40 12.0 12.48 12.60 V - 90 - % 1.213 1.200 1.25 1.287 1.300 V - 73 - % www.Orister.com Page No. : 3/8 All Output Voltage Versions Electrical Characteristics o Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25 C (Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=18V for the 12V version, ILOAD=500mA) Parameter Symbol Test Condition Min. Typ. Max. Unit - -10 -50 -100 nA 120 110 150 173 173 KHz - 1.3 1.4 1.5 V - 100 0 - % 3.6 4.5 6.5 7.5 A Device Parameters Feedback Bias Current Ib Adjustable Version Only, VFB=1.3V Oscillator Frequency fO (Note 5) IOUT=2A (Note 6,7) Saturation Voltage VSAT Max. Duty Cycle (ON) Min. Duty Cycle (OFF) DC (Note 8) Current Limit ICL Peak Current (Note 6,7) (Note 7) (Note 6,8) Output Leakage Current IL Output=0V - - -50 uA Quiescent Current IQ (Note 8) - 5 10 mA ON/OFF pin=5V (Note 9) - 150 250 300 uA DIP-8 Junction to Case - 14 - - 15 - Junction to ambient - 80 - - 70 - Standby Quiescent Current ISTBY θJC Thermal Resistance θJA (Note 10) SOP-8 DIP-8 SOP-8 o C/W o C/W ON/OFF Control ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Input Current VIH Low (Regulator ON) - VIL High (Regulator OFF) IIH VLOGIC=2.5V (Regulator OFF) - -5 -15 IIL VLOGIC=0.5V (Regulator ON) - -0.02 -5 2.0 0.6 1.3 - V uA Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. o Note 3: Typical numbers are at 25 C and represent the most likely norm. Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Note 5: The switching frequency is reduced when the second stage current limit is activated. Note 6: No diode, inductor or capacitor connected to output pin. Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. Note 9: VIN=22V. 2 Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in ) DS-AX1509-01 Aug, 2006 www.Orister.com Page No. : 4/8 Characteristics Curve Normalized Output Voltage Shutdown Quiescent Current 160 1.5 VIN=12V 140 ILOAD=200mA 120 0.5 Current (uA) Output Voltage Change (%).. 1 0 100 VON/VOFF=5V 80 o TJ=25 C 60 -0.5 40 -1 20 -1.5 0 25 50 75 100 125 150 0 175 0 o 10 20 30 Supply Voltage (V) Junction Temperature ( C) 40 Switch Saturation Voltage Switch Current Limit 1.30 6.00 VIN=12V TJ=25oC 1.20 5.80 Saturation Voltage (V) Switch Current Limit (A) 5.90 5.70 5.60 VIN=12V 5.50 VOUT =5V 5.40 1.10 1.00 0.90 5.30 0.80 5.20 0 25 50 75 100 125 o 150 0 1 2 3 4 Switch Current (A) Junction Temperature ( C) On/Off Pin Current (Sinking) 12 10 Vin=22V Current (uA) 8 Tj=25℃ 6 4 2 0 0 5 10 15 20 25 30 On/Off Pin Voltage (V) DS-AX1509-01 Aug, 2006 www.Orister.com Page No. : 5/8 Typical Application Circuit Fig.1 Fixed Type Circuit 3 FB + AX1509 1 Vin DC C1 680uF 2 Fix Output 4 5 6 7 8 Output SD Gnd Gnd Gnd Gnd L1 33uH D1 1N5825 L O A D C2 220uF Fig.2 Adjustable Output Voltage Versions R2 R1 3 FB 1K 1 + Vin DC DS-AX1509-01 Aug, 2006 C1 680uF AX1509 2 Adjustable Output 4 5 6 7 8 Output SD Gnd Gnd Gnd Gnd L1 47uH D1 1N5825 C2 220uF L O A D www.Orister.com Page No. : 6/8 DIP-8 Dimension 8 6 7 Marking: 5 A 1 2 3 4 B J Note: Green label is used for pb-free packing Pin Style: 1.Vin 2.Output 3.FB 4.SD 5.Gnd 6.Gnd 7.Gnd 8.Gnd F E C G M H D I Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 α1 K DIM A B C D E F G H I J K L M α1 Min. 6.29 9.22 3.25 3.17 0.38 2.28 7.49 8.56 0.229 o 94 Max. 6.40 9.32 *1.52 *1.27 *0.99 3.35 3.55 0.53 2.79 7.74 *3.00 8.81 0.381 o 97 *: Typical, Unit: mm L 8-Lead DIP-8 Plastic Package Package Code: P SOP-8 Dimension A 8 7 B 6 3 I 5 C Pin1 Index 2 Marking: G H 4 Note: Green label is used for pb-free packing Pin Style: 1.Vin 2.Output 3.FB 4.SD 5.Gnd 6.Gnd 7.Gnd 8.Gnd J D K E Part A Part A F M L N Material: • Lead solder plating: Sn60/Pb40 (Normal), Sn/3.0Ag/0.5Cu or Pure-Tin (Pb-free) • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 DIM A B C D E F G H I J K L M N O Min. 4.85 3.85 5.80 1.22 0.37 3.74 1.45 4.80 0.05 0.30 0.19 0.37 0.23 0.08 0.00 Max. 5.10 3.95 6.20 1.32 0.47 3.88 1.65 5.10 0.20 0.70 0.25 0.52 0.28 0.13 0.15 *: Typical, Unit: mm O 8-Lead SO-8 Plastic Surface Mounted Package Package Code: S Ordering Information Part Number AX1509S-ADJ AX1509S -3.3 AX1509S -5.0 AX1509S -12 DS-AX1509-01 Aug, 2006 Package SOP-8 SOP-8 SOP-8 SOP-8 Part Number AX1509P-ADJ AX1509P -3.3 AX1509P -5.0 AX1509P -12 Package DIP-8 DIP-8 DIP-8 DIP-8 www.Orister.com Page No. : 7/8 Soldering Methods for Orister’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile tP Critical Zone TL to TP TP Ramp-up TL tL Temperature Tsmax Tsmin tS Preheat 25 Ramp-down t 25oC to Peak Time Profile Feature Sn-Pb Eutectic Assembly Pb-Free Assembly <3 C/sec <3oC/sec - Temperature Min (Tsmin) 100oC 150oC - Temperature Max (Tsmax) 150oC 200oC 60~120 sec 60~180 sec <3oC/sec <3oC/sec 183oC 217oC Average ramp-up rate (TL to TP) o Preheat - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) 60~150 sec Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature o o 60~150 sec 240 C +0/-5 C 260oC +0/-5oC 10~30 sec 20~40 sec <6oC/sec <6oC/sec <6 minutes <8 minutes Peak temperature Dipping time 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. DS-AX1509-01 Aug, 2006 o o 245 C ±5 C 5sec ±1sec 260oC +0/-5oC 5sec ±1sec www.Orister.com Page No. : 8/8 Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of Orister Corporation. • Orister Corporation reserves the right to make changes to its products without notice. • Orister Corporation products are not warranted to be suitable for use in Life-Support Applications, or systems. • Orister Corporation assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Contact Info: Orister Corporation • No. 8, Lane 136, Jiaren St., ZhuBei City, HsinChu Country 302, Taiwan • TEL: +886 3 5588 908 • FAX: +886 3 5588 909 • http://www.orister.com • [email protected] DS-AX1509-01 Aug, 2006 www.Orister.com