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LTC1555 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1555 Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LTC1555/LTC1556 VIN = 2.7V to 10V, DVCC = 1.8V to 5.5V, controller digital pins tied to DVCC, SIM digital pins floating, EN, FB pins tied to GND (LTC1556), C1 = 0.1 µF, COUT = 10µF unless otherwise specified. ELECTRICAL CHARACTERISTICS over the – 40 °C to 85°C temperature range by design or correlation, but are not production tested. Note 3: The DATA and I/O pull-down drivers must also sink current sourced by the internal pull-up resistors. PARAMETER CONDITIONS MIN TYP MAX UNITS VCC Short-Circuit Current VCC Shorted to GND q 12.5 40 mA Auxiliary LDO VOUT (VLDO) EN = High, VCC = 5V, FB = LDO, ILDO = 5mA (LTC1556) q 4.00 4.3 4.55 V Auxiliary Switch Resistance EN = High, VCC = 5V, FB = GND (LTC1556) q 18 30 Ω FB Input Resistance (LTC1556) 200 k Ω Charge Pump fOSC q 500 650 800 kHz Controller Inputs/Outputs, DVCC = 3V Input Current (IIH, IIL) M0, M1, SS, RIN, CIN q –1 1 µA DDRV, EN q –5 5 µA High Level Input Current (IIH) DATA q –20 20 µA Low Level Input Current (IIL) DATA q 1mA High Input Voltage Threshold (VIH) M0, M1, RIN, CIN, DDRV, EN q 0.7 × DVCC V DATA q DVCC – 0.6 V Low Input Voltage Threshold (VIL) M0, M1, RIN, CIN, DDRV, EN q 0.2 × DVCC V DATA q 0.4 V High Level Output Voltage (VOH) DATA Source Current = 20 µA, I/O = VCC q 0.7 × DVCC V Low Level Output Voltage (VOL) DATA Sink Current = – 200 µA, I/O = 0V (Note 3) q 0.4 V DATA Pull-up Resistance Between DATA and DVCC q 13 20 28 k Ω DATA Output Rise/Fall Time DATA Loaded with 30pF q 1.3 2 µs SIM Inputs/Outputs, DVCC = 3V, VCC = 3V or 5V I/O High Input Voltage Threshold (VIH)IIH(MAX) = ±20µA q 0.5 × VCC 0.7 × VCC V I/O Low Input Voltage Threshold (VIL)IIL(MAX) = 1mA q 0.4 V High Level Output Voltage (VOH) I/O, Source Current = 20 µA, DATA or DDRV = DVCC q 0.8 × VCC V RST, CLK, Source Current = 20 µA q 0.9 × VCC V Low Level Output Voltage (VOL) I/O, Sink Current = – 1mA, DATA or DDRV = 0V (Note 3) q 0.4 V RST, CLK, Sink Current = – 200 µA q 0.4 V I/O Pull-Up Resistance Between I/O and VCC q 6.5 10 14 k Ω SIM Timing Parameters, DVCC = 3V, VCC = 5V CLK Rise/Fall Time CLK Loaded with 30pF q 18 ns RST, I/O Rise/Fall Time RST, I/O Loaded with 30pF q 1 µs CLK Frequency CLK Loaded with 30pF q 5 MHz VCC Turn-On Time SS = DVCC, COUT = 10µF, IVCC = 0 1 ms SS = 0V, COUT = 10µF, IVCC = 0 6 ms VCC Discharge Time to 1V IVCC = 0, VCC = 5V, COUT = 10µF3 ms The q denotes specifications which apply over the specified temperature range. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: C grade device specifications are guaranteed over the 0 °C to 70°C temperature range. In addition, C grade device specifications are assured |
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Similar Description - LTC1555 |
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