Datasheet LT3695 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | 1A Fault Tolerant Micropower Step-Down Regulator |
| Páginas / Página | 30 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| Formato / tamaño de archivo | PDF / 508 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LT3695 Series
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, unless otherwise noted. (Note 4) PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch VCESAT ISW = 1A 350 mV DA Pin Current to Stop OSC 1.25 1.6 1.95 A Switch Leakage Current VSW = 0V, VIN = 36V 0.01 1 μA Boost Schottky Diode Voltage Drop IBSD = 50mA 720 900 mV Boost Schottky Diode Reverse Leakage VSW = 10V, VBD = 0V 0.1 1 μA Minimum Boost Voltage (Note 8) l 1.7 2.3 V BOOST Pin Current ISW = 0.5A 10.5 17.5 mA RUN/SS Pin Current VRUN/SS = 2.5V l 4.5 7.5 μA VRUN/SS = 10V 12 20 μA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Leakage Current VPG = 5V 0.1 1 μA PG Sink Current VPG = 0.4V l 100 1000 μA PG Threshold as % of VFB (LT3695) or Measured at FB (LT3695) or OUT1,2 (LT3695-3.3, LT3695-5) 88 90 92 % VOUT (LT3695-3.3, LT3695-5) Pins (Pin Voltage Rising) PG Threshold Hysteresis LT3695 Measured at FB Pin 12 mV LT3695-3.3 Measured at OUT1,2, Pins 50 mV LT3695-5 Measured at OUT1,2, Pins 75 mV SYNC Threshold Voltage 300 550 800 mV SYNC Input Frequency 0.3 2.2 MHz
Note 1:
Stresses beyond those listed under absolute maximum ratings
Note 5:
These ICs include overtemperature protection that is intended may cause permanent damage to the device. Exposure to any Absolute to protect the devices during momentary overload conditions. Junction Maximum Rating condition for extended periods may affect the device temperature will exceed the maximum operating junction temperature reliability and lifetime. when overtemperature protection is active. Continuous operation above
Note 2:
Positive currents fl ow into pins, negative currents fl ow out of pins. the specifi ed maximum operating junction temperature may impair device Minimum and maximum values refer to absolute values. reliability.
Note 3:
Absolute maximum voltage at V
Note 6:
This is the voltage necessary to keep the internal bias circuitry in IN and RUN/SS pins is 60V for nonrepetitive 1 second transients, and 36V for continuous operation. regulation.
Note 4:
The LT3695E regulators are guaranteed to meet performance
Note 7:
Current limit guaranteed by design and/or correlation to static test. specifi cations from 0°C to 125°C junction temperature. Specifi cations Slope compensation reduces current limit at higher duty cycles. over the –40°C to 125°C operating junction temperature range are
Note 8:
This is the minimum voltage across the boost capacitor needed to assured by design, characterization and correlation with statistical process guarantee full saturation of the switch. controls. The LT3695I regulators are guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3695H regulators are guaranteed over the full –40°C to 150°C operating junction temperature range. 3695fa 4
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, unless otherwise noted. (Note 4) PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch VCESAT ISW = 1A 350 mV DA Pin Current to Stop OSC 1.25 1.6 1.95 A Switch Leakage Current VSW = 0V, VIN = 36V 0.01 1 μA Boost Schottky Diode Voltage Drop IBSD = 50mA 720 900 mV Boost Schottky Diode Reverse Leakage VSW = 10V, VBD = 0V 0.1 1 μA Minimum Boost Voltage (Note 8) l 1.7 2.3 V BOOST Pin Current ISW = 0.5A 10.5 17.5 mA RUN/SS Pin Current VRUN/SS = 2.5V l 4.5 7.5 μA VRUN/SS = 10V 12 20 μA RUN/SS Input Voltage High 2.5 V RUN/SS Input Voltage Low 0.2 V PG Leakage Current VPG = 5V 0.1 1 μA PG Sink Current VPG = 0.4V l 100 1000 μA PG Threshold as % of VFB (LT3695) or Measured at FB (LT3695) or OUT1,2 (LT3695-3.3, LT3695-5) 88 90 92 % VOUT (LT3695-3.3, LT3695-5) Pins (Pin Voltage Rising) PG Threshold Hysteresis LT3695 Measured at FB Pin 12 mV LT3695-3.3 Measured at OUT1,2, Pins 50 mV LT3695-5 Measured at OUT1,2, Pins 75 mV SYNC Threshold Voltage 300 550 800 mV SYNC Input Frequency 0.3 2.2 MHz
Note 1:
Stresses beyond those listed under absolute maximum ratings
Note 5:
These ICs include overtemperature protection that is intended may cause permanent damage to the device. Exposure to any Absolute to protect the devices during momentary overload conditions. Junction Maximum Rating condition for extended periods may affect the device temperature will exceed the maximum operating junction temperature reliability and lifetime. when overtemperature protection is active. Continuous operation above
Note 2:
Positive currents fl ow into pins, negative currents fl ow out of pins. the specifi ed maximum operating junction temperature may impair device Minimum and maximum values refer to absolute values. reliability.
Note 3:
Absolute maximum voltage at V
Note 6:
This is the voltage necessary to keep the internal bias circuitry in IN and RUN/SS pins is 60V for nonrepetitive 1 second transients, and 36V for continuous operation. regulation.
Note 4:
The LT3695E regulators are guaranteed to meet performance
Note 7:
Current limit guaranteed by design and/or correlation to static test. specifi cations from 0°C to 125°C junction temperature. Specifi cations Slope compensation reduces current limit at higher duty cycles. over the –40°C to 125°C operating junction temperature range are
Note 8:
This is the minimum voltage across the boost capacitor needed to assured by design, characterization and correlation with statistical process guarantee full saturation of the switch. controls. The LT3695I regulators are guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3695H regulators are guaranteed over the full –40°C to 150°C operating junction temperature range. 3695fa 4