AX2596

Page No. : 1/7 AX2596 150KHz, 3A PWM Buck DC/DC Converter AX2596 Series Description The AX2596 is Monolithic IC that design for a step-down DC/DC Converter, and own the ability of driving a 3A 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. TO220-5L Package 12345 Features • 3.3V, 5V, 12V and adjustable • Adjustable version output voltage range: 1.4-37V • ±4% max over line and load conditions • 150KHz ±15% fixed switching frequency • TTL shutdown capability • Operating voltage can be up to 40V • Output load current: 3A • TO220-5L and TO263-5L 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 TO263-5L Package 12345 Applications • Simple High-efficiency step-down regulator • Positive to negative converter • On-card switching regulators Connection Diagrams TO220-5L Pins 1,3,5 Side View Pins 2,4 Side View 5 - On/Off 4 - Feed Back 3 - Ground 2 - Output 1 - VIN Metal Tab GND TO263-5L Top View Metal Tab GND 5 - On/Off 4 - Feed Back 3 - Ground 2 - Output 1 - VIN Top View AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 2/7 Pin Connections SD VIN Current Source Bias + + 220mV R 1.235V Reference 2.5V Regulator Start Up 200mV + COMP Current Limit FB R2 + AMP + COMP COMP + 150KHz OSC. COMP + 3A Switch Driver Thermal Limit R1=2.5K Output GND Absolute Maxium Rating (Note1) Parameter Supply Voltage On/Off Pin Input Voltage Feedback Pin Voltage Output Voltage to Ground Power Dissipation Operating Temperature Storage Temperature Operating Voltage Symbol VCC VSD VFB VOUT PD Topr Tstg VOP Value 40 -0.3~+25 -0.3~+25 -1 Internally Limited -40~+125 -65~+150 +4.5~+40 Unit V V V V W o o C C V Electrical Characteristics (Continued) Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25oC(Note 2) Part No. Parameter Output Voltage Efficiency Symbol VOUT η VOUT η VOUT η VOUT η Conditions 4.75V≤VIN≤40V, 0.2A≤ILOAD≤3A VIN=12V, ILOAD=3A 7V≤VIN≤40V, 0.2A≤ILOAD≤3A VIN=12V, ILOAD=3A 15V≤VIN≤40V, 0.2A≤ILOAD≤3A VIN=25V, ILOAD=3A 4.5V≤VIN≤40V, 0.2A≤ILOAD≤3A VOUT programmed for 3V VIN=12V, VOUT=3V, ILOAD=3A Min. 3.168 3.135 4.800 4.750 11.52 11.40 1.261 1.248 - Typ. Max. (Note3) (Note4) 3.3 73 5.0 80 12.0 90 1.300 73 3.342 3.465 5.200 5.250 12.48 12.60 1.339 1.352 - Unit V % V % V % V % AX2596-3.3 AX2596-5.0 Output Voltage Efficiency AX2596-12 Output Voltage Efficiency AX2596-ADJ Output Voltage Efficiency AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 3/7 All Output Voltage Versions Electrical Characteristics Specifications with boldface type apply over for full operating temperature range, the other type are for TJ=25oC (Unless otherwise specified, VIN=12V for the 3.3V, 5V, and adjustable version and VIN=24V for the 12V version, ILOAD=500mA) Parameter Device Parameters Feedback Bias Current Oscillator Frequency Saturation Voltage Max. Duty Cycle (ON) Min. Duty Cycle (OFF) Current Limit Output Leakage Current Quiescent Current Standby Quiescent Current Symbol Test Condition Min. Typ. Max. 50 100 173 173 1.4 1.5 5.5 6.5 50 10 250 300 0.6 15 5 Unit Ib fO VSAT DC ICL IL IQ ISTBY θJC Adjustable Version Only, VFB=1.3V (Note 5) 127 110 3.6 2.0 - 10 150 1.3 100 0 4.5 5 150 2.5 3.5 28 23 nA KHz V % A uA mA uA o IOUT=3A (Note 6,7) (Note 7) (Note 8) Peak Current (Note 6,7) Output=0V (Note 6,8) (Note 8) ON/OFF pin=5V (Note 9) TO220-5L TO263-5L TO220-5L TO263-5L Junction to Case Junction to ambient C/W C/W Thermal Resistance θJA(Note 10) ON/OFF Control ON/OFF Pin Logic Input Threshold Voltage ON/OFF Pin Input Current VIH VIL IIH IIL o Low (Regulator ON) High (Regulator OFF) VLOGIC=2.5V (Regulator OFF) VLOGIC=0.5V (Regulator ON) 1.3 5 0.02 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. Note 3: Typical numbers are at 25oC 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=40V. Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in2) AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 4/7 Characteristics Curve Normalized Output Voltage 1.5 VIN=12V ILOAD=200mA 120 160 140 Shutdown Quiescent Current 1 Output Voltage Change (%). . Current (uA) 0.5 100 80 60 40 VON/VOFF=5V TJ=25 C o 0 -0.5 -1 20 -1.5 0 25 50 75 100 o 125 150 175 0 0 10 20 30 Supply Voltage (V) 40 Junction Temperature ( C) Switch Current Limit 6.00 5.90 1.30 VIN=12V TJ=25 C 1.20 o Switch Saturation Voltage Switch Current Limit (A) 5.70 5.60 5.50 5.40 5.30 5.20 0 25 50 75 100 o Saturation Voltage (V) 5.80 1.10 VIN=12V VOUT =5V 1.00 0.90 0.80 125 150 0 1 2 3 4 Junction Temperature ( C) Switch Current (A) On/Off Pin Current (Sinking) 12 10 Current (uA) 8 VIN=40V TJ=25 C o 6 4 2 0 0 5 10 15 20 25 30 On/Off Pin Voltage (V) AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 5/7 Typical Application Circuit Fig.1 Fixed Type Circuit 4 Feedback + 1 Input AX2596 Fix Output 3 GND 2 Output 5 ON/OFF L1 33uH D1 1N5825 C2 220uF Unregulated DC Input C1 680uF L O A D Fig.2 Adjustable Output Voltage Versions R2 1K R1 4 Feedback AX2596 Adjustable Output 3 GND 2 Output + 1 Input L1 47uH D1 1N5825 C2 220uF Unregulated DC Input C1 680uF 5 ON/OFF L O A D AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 6/7 TO-263-5L Dimension Marking: A B E F K Pb Free Mark Pb-Free: " . " (Note) AX Normal: None U ADJ,3.3,5.0,12 Product Series 2596 Control Code G C 1 2 3 4 5 H L Date Code Note: Green label is used for pb-free packing Pin Style: 1.Vin 2.Output 3.Ground 4.Feed Back 5.On/Off I J D a1 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 a1 Min. 9.9 15.20 4.50 8.20 0.05 5.10 2.44 0O Max. 10.30 #7.10 15.60 *1.70 4.70 *1.27 8.60 0.25 5.50 2.64 #7.00 #4.48 7O #: REF, *: Typical, Unit: mm 5-Lead TO-263 Plastic Package AVANTICS Package Code: U TO-220-5L Dimension Marking: A B r1 K J Pb Free Mark Pb-Free: " . " (Note) Normal: None AX Product Series ADJ,3.3,5.0,12 E 2596 - C D Date Code Control Code Note: Green label is used for pb-free packing E L a1 O a1 M a1 N Pin Style: 1.Vin 2.Output 3.Ground 4.Feed Back 5.On/Off 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 S r2 F r3 r3 r3 G I H P R Q 5-Lead TO-220 Plastic Package AVANTICS Package Code: E DIM A B C D E F G H I J K L M N O P Q R S r1 r2 r3 a1 Min. 10.10 2.55 3.20 7.90 12.50 22.30 3.20 0.70 6.60 4.40 1.17 17.00 16.00 17.00 2.30 3.30 0.28 7.62 22.90 1.85 1.20 2.80 4.5o Max. 10.50 2.95 3.60 8.30 12.90 22.70 3.60 0.90 7.00 4.80 1.37 18.00 16.40 19.00 2.70 4.10 0.48 8.02 23.30 1.95 1.30 3.20 5.5o *: Typical, Unit: mm Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of AVANTIC. • AVANTICS reserves the right to make changes to its products without notice. • AVANTICS semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • AVANTICS assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office: • AVANTICS Microelectronics Corp: No. 255, Cai Lun Rd. Zhangjiang Technology Industrial Park Pudong, Shanghai, China Tel: 86-021-58955599 Fax: 86-021-58558038 AVANTICS – AX2596 Series Specification No.: 050310-FE0009 Page No. : 7/7 Soldering Methods for HSMC’s Products 1. Storage environment: Temperature=10oC~35oC Humidity=65%±15% 2. Reflow soldering of surface-mount devices Figure 1: Temperature profile tP TP Ramp-up TL Tsmax Temperature tL Critical Zone TL to TP Tsmin tS Preheat Ramp-down 25 t 25oC to Peak Time Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) Tsmax to TL - Ramp-up Rate Time maintained above: - Temperature (TL) - Time (tL) Peak Temperature (TP) Time within 5oC of actual Peak Temperature (tP) Ramp-down Rate Time 25oC to Peak Temperature 3. Flow (wave) soldering (solder dipping) Products Pb devices. Pb-Free devices. AVANTICS – AX2596 Series Sn-Pb Eutectic Assembly