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| TS1537A/B/C Dual 1A Low Dropout Positive Voltage Regulator Pin assignment: 1. Input 2 2. Input 1 3. Ground 4. Output 1 (3.3V/2.5V) 5. Output 2 (2.5V/1.8V) Dual Output for 3.3V, 2.5V or 1.8V Low Dropout Voltage 1.3V max. General Description The TS1537A, TS1537B & TS1537C are low dropout positive voltage regulators with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V/2.5V (TS1537A) or 3.3V/1.8V(TS1537B) or 2.5V/1.8V(TS1537C) logic supply. This series are guaranteed to have less 1.4V dropout at full load current making it ideal to provide well regulated outputs dual channels with up to 12V input supply. This series is offered in 5-pin TO-263-5L package. Features Low dropout performance 1.3V max. Full current rating over line and temperature. Fast transient response 2%Total output regulation over line, load and temperature Build-in thermal shutdown each channel Output current limiting for each channel Good noise rejection Channel 1=3.3V (TS1537A/B) or 2.5V (TS1537C) Channel 2=2.5V (TS1537A) or 1.8V (TS1537B/C) Block Diagram (each channel) Ordering Information Part No. TS1537ACM5 TS1537BCM5 TS1537CCM5 Note: TS1537A is ch1=3.3V, ch2=2.5V, TS1537B is ch1=3.3V, ch2=1.8V. TS1537C is ch1=2.5V, ch2=1.8V. -0 ~ +85 oC TO-263-5L Operating Temp. (Ambient) Package Absolute Maximum Rating Input Supply Voltage Operation Input Supply Voltage Power Dissipation Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature (260 oC) Vin Vin (operate) PD TJ TSTG 12 10 Internally Limited 0 ~ +150 -65 ~ +150 10 V V W o o C C S TS1537A/B/C 1-5 2003/12 rev. B Electrical Characteristics Ta = 25 oC, unless otherwise specified. Parameter Output Voltage TS1537A/B-Vout 1 TS1537A/C-Vout 2/1 TS1537B/C-Vout 2 Input Supply Voltage Line Regulation Load Regulation Vout 1 Vout 2 Conditions 4.8V Vin 7V, Io=10mA 4V Vin 7V, Io=10mA 4V Vin 7V, Io=10mA Min 3.267 2.475 1.782 -- Typ 3.3 2.5 1.8 -0.015 0.5 1.3 8 0.008 -0.5 60 Max 3.366 2.550 1.836 10 0.2 1.0 1.4 10 0.04 --70 Unit V V V % % V mA uA A % dB Vout+1.5V Vin 7V, Io=10mA Vin=5V, 10mA Io 1A Vin=4V, 10mA Io 1A Io=1A, Vout=0.1%Vout 0 oC Tj 125 oC, (note 3) Ta=25 oC, 30mS pulse Vin - Vout=3V Io=10mA F = 120Hz, Io=1A Cout=25uF, Vin=Vout + 3V -----1.1 --- (note 1,2) Dropout Voltage Minimum Load Current Thermal Regulation Current Limit Temperature Stability Ripple Rejection Thermal Performance Condition Thermal Resistance Junction to Ambient TO-263-5L 85 Package type Typ Unit o C/W Note 1: See thermal regulation specification for changes in output voltage due to heating effects. Line and load regulation are measured at a constant junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead = 1/18" from the package. Note 2: Line and load regulation are guaranteed up to the maximum power dissipation of 15W. Power dissipation is determined by the input / output voltage difference and the output current. Guaranteed maximum power dissipation will not be available over the full input / output voltage range. Note 3: Quiescent current is defined as the minimum output current required to maintain the regulation. TS1537A/B/C 2-5 2003/12 rev. B Typical Application Circuit "A" version "B" version "C" version TS1537A/B/C 3-5 2003/12 rev. B Electrical Characteristics Curve (each channel) Figure 1: dropout voltage v.s. output current Figure 2: load regulation v.s. temp. Figure 3: output change v.s. temp. Figure 4: line regulation Figure 5: line transient response Figure 6: load transient response TS1537A/B/C 4-5 2003/12 rev. B TO-263-5L Mechanical Drawing A E F J B DIM A B C D E F G H I J TO-263-5L DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 10.220 14.600 0.750 1.573 4.560 1.240 2.280 0.280 8.240 1.540 10.260 15.870 0.770 1.827 4.570 1.270 2.790 0.320 8.280 1.800 0.402 0.575 0.030 0.062 0.179 0.049 0.090 0.011 0.324 0.060 0.404 0.625 0.030 0.072 0.180 0.050 0.110 0.013 0.326 0.071 I C G D H TS1537A/B/C 5-5 2003/12 rev. B |
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