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LTC1261 Datasheet(PDF) 3 Page - Linear Technology |
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LTC1261 Datasheet(HTML) 3 Page - Linear Technology |
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3 / 16 page  3 LTC1261 ELECTRICAL C C HARA TERISTICS 0 °C ≤ T A ≤ 70°C– 40°C ≤ TA ≤ 85°C (Note 7) SYMBOL PARAMETER CONDITIONS (Note 2) MIN TYP MAX MIN TYP MAX UNITS ∆VOUT Output Regulation – 1.24V ≥ VOUT ≥ –4V, 0 ≤ IOUT ≤ 8mA q 15 % (Note 2) – 1.24V ≥ VOUT ≥ –4V, 0 ≤ IOUT ≤ 7mA q 15 % – 4V ≥ VOUT ≥ –5V, 0 ≤ IOUT ≤ 8mA (Note 6) 2 2 % ISC Output Short-Circuit Current VOUT = 0V q 60 125 60 125 mA VRIP Output Ripple Voltage IOUT = 5mA, VOUT = – 4V 5 5 mV Doubler Mode. VCC = 5V ±10%, C1 = 0.1µF, C2 = 0 (Note 4), COUT = 3.3µF unless otherwise specified. LTC1261CS Only. Tripler Mode. VCC = 2.7V, C1 = C2 = 0.1µF (Note 4), COUT = 3.3µF unless otherwise specified. 0 °C ≤ TA ≤ 70°C–40°C ≤ TA ≤ 85°C (Note 7) SYMBOL PARAMETER CONDITIONS (Note 2) MIN TYP MAX MIN TYP MAX UNITS ∆VOUT Output Regulation – 1.24V ≥ VOUT ≥ –4V, 0 ≤ IOUT ≤ 5mA q 15 1 5 % ISC Output Short-Circuit Current VOUT = 0V q 60 125 60 125 mA VRIP Output Ripple Voltage IOUT = 5mA, VOUT = – 4V 5 5 mV 0 °C ≤ TA ≤ 70°C–40°C ≤ TA ≤ 85°C (Note 7) SYMBOL PARAMETER CONDITIONS (Note 2) MIN TYP MAX MIN TYP MAX UNITS ∆VOUT Output Regulation – 1.24V ≥ VOUT ≥ –4.5V, 0 ≤ IOUT ≤ 6mA q 15 1 5 % (Note 2) – 4.5V ≥ VOUT ≥ –5V, 0 ≤ IOUT ≤ 3.5mA q 25 2 % ISC Output Short-Circuit Current VOUT = 0V q 35 75 35 75 mA VRIP Output Ripple Voltage IOUT = 5mA, VOUT = – 4V 5 5 mV 0 °C ≤ T A ≤ 70°C– 40°C ≤ TA ≤ 85°C (Note 7) SYMBOL PARAMETER CONDITIONS (Note 2) MIN TYP MAX MIN TYP MAX UNITS ∆VOUT Output Regulation – 1.24V ≥ VOUT ≥ –4V, 0 ≤ IOUT ≤ 12mA q 15 1 5 % – 4V ≥ VOUT ≥ –5V, 0 ≤ IOUT ≤ 10mA q 25 2 5 % ISC Output Short-Circuit Current VOUT = 0V q 35 75 35 75 mA VRIP Output Ripple Voltage IOUT = 5mA, VOUT = – 4V 5 5 mV LTC1261CS Only. Tripler Mode. VCC = 5V ±10%, C1 = C2 = 0.1µF (Note 4), COUT = 3.3µF unless otherwise specified. LTC1261CS Only. Tripler Mode. VCC = 3.3V ±10%, C1 = C2 = 0.1µF (Note 4), COUT = 3.3µF unless otherwise specified. to C2 – with C1 – and C2 + floating. For the LTC1261CS8 in doubler mode, C1 connects from C1+ to C1 –; there are no C2 pins. Note 5: Setting output to < – 7V will exceed the absolute voltage maximum rating with a 5V supply. With supplies higher than 5V, the output should never be set to exceed VCC – 12V. Note 6: For output voltages below – 4.5V the LTC1261 may reach 50% duty cycle and fall out of regulation with heavy load or low input voltages. Beyond this point, the output will follow the input with no regulation. Note 7: C grade device specifications are guaranteed over the 0 °C to 70°C temperature range. In addition, C grade device specifications are assured over the –40 °C to 85°C temperature range by design or correlation, but are not production tested. The q denotes specifications which apply over the full operating temperature range. Note 1: The Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to ground unless otherwise specified. Note 3: All typicals are given at TA = 25°C. Note 4: C1 = C2 = 0.1 µF means the specifications apply to tripler mode where VCC – VOUT = 3VCC (LTC1261CS only; the LTC1261CS8 cannot be connected in tripler mode) with C1 connected between C1+ and C1 – and C2 connected between C2 + and C2 –. C2 = 0 implies doubler mode where VCC – VOUT = 2VCC; for the LTC1261CS this means C1 connects from C1 + |
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Similar Description - LTC1261 |
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