TS1581 TSC | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 7

Technical content

Features

— Very low dropout voltage: 700mV @5A — Output current up to 5A — Low current Consumption — High Accuracy Output Voltage: +/- 1% — Fast transient response — Remote sense — Internal current limit — Thermal shutdown protection

Ordering Information

Note: Where xx denotes voltage option, available are 3.3V and 2.5V. Leave blank for adjustable version. Contact factory for additional voltage options. Part No. Operating Temp. (Ambient) Package TS1581CZ5xx TS1581CZ5 TO-220-5L TS1581CM5xx TS1581CM5 0 ~ +85 oC TO-263-5L

Applications

— High efficiency linear voltage regulators — Post regulators for switching supplies. — Advance graphic card — Adjustable power supply Block Diagram Typical Application Circuit Pin Assignment: 1. Sense 2. Adj / Gnd 3. Output 4. V control 5. V power

TS1581 series 2-2 2003/12 rev. B Absolute Maximum Rating Input Supply Voltage V power V control Vpower Vcontrol V Power Dissipation P D Internally Limited W Operating Junction Temperature Range T J 0 ~ +125 oC Storage Temperature Range T STG -65 ~ +150 oC Lead Soldering Temperature (260 oC) TO-220-5L / TO-263-5L Package S

Electrical Characteristics

Tj=+25°C, Ccontrol=Cpower=Cout=10uF unless Specified Parameter Conditions Min Typ Max Unit VCONTROL = 4.5V, VPOWER = 2.05V, IO = 10mA 1.238 1.262 Reference Voltage (Adj. Voltage Versions) VCONTROL = 4.5V, VPOWER = 2.05V, IO = 10mA to 5A 1.230 1.250 1.270 V VCONTROL = 5V, VPOWER =VOUT+0.8V,IO=10mA -1.0 +1.0 Output Voltage (Fixed Voltage Versions) VCONTROL = 5V, VPOWER = VOUT+0.8V, IO = 10mA to 5A -1.6 VOUT +1.6 Line Regulation VCONTROL = (Vout+1.5V) to 12V, VPOWER = (VOUT+0.8V) to 5.5V, IO = 10mA 0.04 0.2 Load Regulation VCONTROL = (Vout+2.5V), VPOWER = (VOUT+0.8V), IO = 10mA to 5A 0.08 0.4 Mini. Load Current (Note 2) V CONTROL=5V, VPOWER= 3.3V, VADJ=0V 5 10 mA Control Pin Current (Note 3) VCONTROL = (VOUT+2.5V), VPOWER = (VOUT+0.8V), IO = 10mA to 5A 80 135 mA Adjust Pin Current VCONTROL = 2.75V, VPOWER = 2.05, VADJ = 0V, IO = 10mA 50 120 uA Current Limit V POWER - VOUT = 3V 5.5 6.8 A Ripple Rejection VCONTROL = VPOWER = 5V, VRIPPLE = 1V, IO = 2.5A, f = 120kHz 60 80 dB Thermal Regulation 30mS pulse 0.003 %/W Dropout Voltage (Note 4) V CONTROL = (Vout+2.5V), IO = 5A 0.55 0.70 V Note1: VOUT = VSENSE, VADJ = 0V unless otherwise specified. Note2: For the adjustable device the minimum load current is the minimum current required to maintain regulation, normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. Note3: The control pin current is the drive current required for the output transistor, this current will track output current with a ratio of about 1:100 Note4: If the same voltage is input to both VPOWER and VCONTROL, then the dropout voltage will become 1.3V maximum, and minimum input/output voltage required to maintain 1% regulation.

TS1581 series 3-3 2003/12 rev. B Thermal Performance Condition Package type Typ Unit TO-220-5L 50 Thermal Resistance Junction to Ambient TO-263-5L 60 oC/W Pin Description Pin No. Pin Name Pin Description 1 Sense This pin is the positive side of the reference voltage for this device. With this pin it is possible to Kelvin Sense the output voltage at the load. 2 Adjust / Ground This pin is the negative side of the refe rence voltage for this device. Transient response can be improved by adding a small by pass capacitor from the adjust pin to ground. 3 Output This pin is power output of the device. 4 Control This pin is the supply pin for the control circ uitry for the device. The current flow into this pin will be about 1% of the output current. For the dev ice to regulate, the voltage at this pin must be 1.3V greater than the output voltage. 5 Power This pin is the collector of the power tr ansistor. The output l oad current is supplied through this pin. The voltage at this pin must be 0.7V greater than the output voltage for the device to regulate.

between the Output pin and V power pin of the device. instantaneously shorted to ground, damage can occur. A diode from output to input is recommended. Figure 6. Optional Clamp Diodes Protect Against Input pin will protect the control input pin. temperature of the Power section can run up to 150 oC. determined by the total power dissipated in the device. power in the control circuit. The power in the control circuit is negligible. contribution to thermal resistance has to be considered.

TS1581 series 7-7 2003/12 rev. B TO-220-5L Mechanical Drawing TO-220-5L DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 10.00 10.50 0.394 0.413 B 3.240 4.440 0.128 0.175 C 2.440 2.940 0.096 0.116 D 0.260 1.020 0.010 0.040 E 1.570 1.830 0.062 0.072 F 13.31 14.13 0.524 0.556 G 4.475 5.225 0.176 0.206 H 1.170 1.370 0.046 0.054 I 27.60 29.44 1.087 1.159 J 2.175 2.925 0.086 0.115 K 0.297 0.477 0.012 0.019 L 8.280 8.800 0.326 0.346 M 6.010 6.510 0.237 0.256 N 14.29 15.31 0.563 0.603 TO-263 Mechanical Drawing B D C A J I H G F E TO-263-5L DIMENSION MILLIMETERS INCHES DIM MIN MAX MIN MAX A 10.220 10.260 0.402 0.404 B 14.600 15.870 0.575 0.625 C 0.750 0.770 0.030 0.030 D 1.573 1.827 0.062 0.072 E 4.560 4.570 0.179 0.180 F 1.240 1.270 0.049 0.050 G 2.280 2.790 0.090 0.110 H 0.280 0.320 0.011 0.013 I 8.240 8.280 0.324 0.326 J 1.540 1.800 0.060 0.071 C D B F E A N L I K J M H G