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PTB48502 Datasheet(PDF) 3 Page - Texas Instruments |
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PTB48502 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 17 page www.ti.com ELECTRICAL CHARACTERISTICS (PTB48500A) PTB48500 PTB48501 PTB48502 SLTS218C – SEPTEMBER 2003 – REVISED AUGUST 2006 (Unless otherwise stated, T A = 25°C, VI = 48 V, CI = 0 µF, CO = 0 µF, and IO = 50% Iomax) PTB48500A PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Po1, Po2 Output Power Vo1 (3.3 V) 19.8 W Vo2 (1.2 V) 8.4 Po total Both outputs 28 W Io1, Io2 Output Current Over VI range Vo1 (3.3 V) 0 6(1) A Vo2 (1.2 V) 0 7(1) Io1 + Io2 Total (both outputs) 0 13 A Vo1 Output Voltage 3.2 3.3 3.4 Includes set point, line, load, –40 °C ≤ T A ≤ 85°C V Vo2 1.16 1.2 1.24 Vo1 ±0.5 ∆Reg temp Temperature Variation –40 °C ≤ T A ≤ 85°C, IO = IO min %VO Vo2 ±0.8 ∆Reg line Line Regulation Over VI range Vo1, Vo2 ±1 ±10 mV ∆Reg load Load Regulation Over IO range Vo1, Vo2 ±3 ±12 mV IO min ≤ Io2≤ Iomax, Io1 = 1 A ∆Vo 1 10 ∆Reg cross Cross Regulation mV IO min ≤ Io1≤ Iomax, Io2 = 1 A ∆Vo 2 10 η Efficiency Io1, Io2 = Iomax 82% Vo1 20 50 Vr VO Ripple (pk-pk) 20 MHz bandwidth mVpp Vo2 20 50 ttr 1 A/ µs load step, 50% to 100% I omax 30 µs Transient Response ∆V tr Vo1, Vo2 over/undershoot ±2.0 %VO Iotrip Over Current Threshold VI = 36 V, reset followed by auto-recovery Io1 + Io2 13.5 16 A Output Voltage Adjust Vadj Vo2 only –10 20 %Vo Range f S Switching Frequency Over VI and IO ranges 500 550 600 kHz VI on VI increasing 34 Under-Voltage Lockout V VI off VI decreasing 32 On/Off Enable (pin 3) Referenced to –VI (pin 5) VIH Input High Voltage 3.6 75 (2) V VIL Input Low Voltage –0.2 0.8 IIL Input Low Current –1 mA II standby Standby Input Current Pins 3 and 5 connected 2 mA CI Internal Input Capacitance 2 µF Co1 0(3) 5000 External Output µF Capacitance Co2 0(3) 5000 Per Telcordia SR-332 50% stress, TA = 40°C, MTBF Reliability 1.5 106 Hrs ground benign (1) See Safe Operating Area curves or contact the factory for the appropriate derating. (2) The On/Off Enable (pin 3) has an internal pull-up and may be controlled with an open-collector (or open-drain) transistor. The input is diode protected and may be connected to +VI. The maximum open-circuit voltage is 7 V. If it is left open circuit the converter will operate when input power is applied. (3) An output capacitor is not required. 3 Submit Documentation Feedback |
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