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| TS2596 Pin assignment: 1. Input 2. Output 3. Ground 4. Feedback 5. Enable Preliminary 3A Step Down Switching Voltage Regulator 150KHz Oscillating Frequency Output Current up to 3A Enable Input Control General Description The TS2596 Series are step-down switching regulators with all required active functions. It is capable of driving 3A load with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version. The TS2596 series operates at a switching frequency of 150kHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. It substantially not only reduces the area of board size but also the size of heat sink, and in some cases no heat sink is required. The 4% tolerance on output voltage within specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency accuracy is within 10%. External shutdown is included. Featuring 70A (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions. This series are offered in 5-pin TO-263, TO-220 package. Features Guaranteed 3A output current 3.3V, 5V, and adjustable versions Wide input voltage range, up to 40V Internal oscillator of 150KHz fixed frequency Wide adjust version output voltage range, from 1.23V to 25V 4% max. at over line and load conditions. Low standby current, typ. 70A, at shutdown mode Requires only 4 external components Thermal shutdown and current limit protection P+ product enhancement tested Ordering Information Part No. TS2596CZ5xx TS2596CZ5 TS2596CM5xx TS2596CM5 -20 ~ +85 C TO-263-5L o Operating Temp. (Ambient) Package TO-220-5L Note: Where xx denotes voltage option, available are 5V and 3.3V. Leave blank for adjustable version. Contact factory for additional voltage options. Applications LCD Monitors ADD-ON Cards Switching Regulators High Efficiency Step-Down Regulators Efficient Pre-regulator for Linear Regulator Absolute Maximum Rating Input Voltage ENABLE Pin Input Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature (260 C) o Vin Vin (operate) PD TJ TSTG +40 -0.3V V Vin Internal Limited -40 ~ +125 -65 ~ +150 5 V V W o o C C S TS2596 1-6 2003/12 rev. D Thermal Performance Condition Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case Symbol ja jc Limits 30 3 Unit o C/W Recommended Operating Conditions (Ta = 25 oC) Condition Input Voltage ENABLE Pin Input Voltage Symbol Vin Vin (operate) Limits 4.5 ~ 28 0 ~ +20 Unit V V Block Diagram Electrical Characteristics Vin = 12V, IL = 500mA, Ta = 25 oC unless otherwise specified. Parameter TS2596-3.3V Output Voltage (Note 1) Efficiency Conditions 0.2A IL 3A, 5.07V Vin 40V (Figure 1) Vin=12V, IL=3A Min Typ Max Unit 0.96|Vo| -- 3.3 75 1.04|Vo| -- V % TS2596-5V Output Voltage (Note 1) Efficiency 0.2A IL 3A, 8V Vin 40V (Figure 1) Vin=12V, IL=3A 0.96|Vo| -5.0 80 1.04|Vo| -V % TS2596 2-6 2003/12 rev. D Electrical Characteristics (Continued) Vin = 12V, IL = 500mA, Ta = 25 oC unless otherwise specified. TS2596 Adjustable Feedback Voltage (Note 1) Efficiency 0.2A IL 3A, 8V Vin 40V, Vout=5V (Figure 2) Vin=12V, Vout=5V, IL=3A 0.96|Vo| -1.23 75 1.04|Vo| -V % All Output Voltage Version (Vin= 12V, IL = 500mA) Oscillator Frequency (Note 2) Quiescent Current (Note 3) Standby Current Saturation Voltage (Note 4) Feedback Bias Current Duty Cycle (Note 5) Current Limit (Note 2)(Note 4) Output Leakage Current (Note 3) ENABLE Threshold Voltage ENABLE Input Current VOUT=0V VOUT=-1V VIH (VOUT=0V) VIL(VOUT=Normal Output Voltage) IIH (ENABLE =5V) IIH (ENABLE =0V) ENABLE =5V ILOAD=3A VOUT=5V (Adj. Version only) Operating (ON) 127 ----93 ---2.0 ---150 5 70 1.2 50 98 4.5 0.3 7.5 --12 0 173 10 200 1.5 100 --2 30 -0.6 30 10 kHz mA uA V nA % A mA V uA Note 1: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. Refer to Application information for details. Note 2: The oscillator frequency reduces when the second stage current limit is activated. The amount of reduction is determined by the severity of current over load. Note 3: For these parameters, FB is removed from VOUT and connected to +12V to force the output transistor OFF. Note 4: VOUT pin sourcing current. No diode, inductor or capacitor connected to VOUT. Note 5: FB is removed from VOUT and connected to 0V. TS2596 3-6 2003/12 rev. D Typical Application Circuit Figure 1 Fixed Voltage Version Figure 2: Adjustable Voltage Version Figure 3: LC filter for Low Output Ripple TS2596 4-6 2003/12 rev. D Application Data Quick Design Component Selection Table for Fixed Output Input / Output Condition Output (V) Load current (A) 3 5 2 Max. Input voltage (V) 8 15 25 9 15 25 5 12 25 6 12 25 Inductor Inductance (uH) 22 33 47 22 68 68 22 22 33 22 33 47 Current (A) 3.5 3.5 3.5 3.1 3.1 3.1 3.5 3.5 3.5 3.1 3.1 3.1 Output Capacitor Nichicon PL series uF V 560 25 330 35 270 35 470 25 180 35 180 35 470 25 560 35 680 35 470 25 330 35 330 35 Sprague 595D series uF V 330 10 330 10 330 10 330 10 270 10 270 10 390 6.3 390 6.3 390 6.3 390 6.3 390 6.3 330 10 3 3.3 2 Quick Design Component Selection Table for Adjustable Output Input / Output Condition Output (V) 2 4 6 9 12 15 24 uF 820 470 470 330 330 220 150 Output Capacitor Nichicon PL series V 35 35 25 25 25 35 35 Sprague 595D series uF 330 330 330 330 270 270 390 V 10 10 10 10 10 10 6.3 Feedforword Capacitor Value 33 10 3.3 1.5 1 680 560 Unit nF nF nF nF nF pF pF Schottky Diode Selection Table Reverse Voltage (V) 20 30 40 Forward Rectified Current (4~6A) Surface Mount -SK53C SK54C Through Hole SR502 SR503 SR504 (Taiwan Semiconductor Part Number) TS2596 5-6 2003/12 rev. D TO-220-5L Mechanical Drawing G A B C H DIM TO-220 DIMENSION MILLIMETERS INCHES MIN 10.00 3.240 2.440 0.260 1.570 13.31 4.475 1.170 27.60 2.175 0.297 8.280 6.010 14.29 MAX 10.50 4.440 2.940 1.020 1.830 14.13 5.225 1.370 29.44 2.925 0.477 8.800 6.510 15.31 MIN 0.394 0.128 0.096 0.010 0.062 0.524 0.176 0.046 1.087 0.086 0.012 0.326 0.237 0.563 MAX 0.413 0.175 0.116 0.040 0.072 0.556 0.206 0.054 1.159 0.115 0.019 0.346 0.256 0.603 M N L I A B C D E F G H I J K L M N F K E D J TO-263-5L Mechanical Drawing A E F J B DIM A B C D E F G H I J I C G D H TO-263 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 10.220 10.260 0.402 0.404 14.600 15.870 0.575 0.625 0.750 0.770 0.030 0.030 1.573 1.827 0.062 0.072 4.560 4.570 0.179 0.180 1.240 1.270 0.049 0.050 2.280 2.790 0.090 0.110 0.280 0.320 0.011 0.013 8.240 8.280 0.324 0.326 1.540 1.800 0.060 0.071 TS2596 6-6 2003/12 rev. D |
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