Datasheet LTC1921 (Analog Devices) - 3
| Manufacturer | Analog Devices |
| Description | Dual –48V Supply and Fuse Monitor |
| Pages / Page | 12 / 3 — ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over … |
| File Format / Size | PDF / 179 Kb |
| Document Language | English |
ELECTRICAL CHARACTERISTICS The. denotes specifications which apply over the full operating
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LTC1921
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. (Note 5) RTN = 0V, VA = –48V, VB = –48V, FUSE A = –48V, FUSE B = –48V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Switch Off Leakage 500 pA Output Switch Resistance in Undervoltage Lockout, VA = VB = –10V, IOUT = 10mA ● 60 Ω OUT F, OUT A, OUT B VA = –10V, VB = 0V, IOUT = 10mA ● 80 Ω VA = 0V, VB = –10V, IOUT = 10mA ● 80 Ω
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
The LTC1921C is guaranteed to meet specified performance from of a device may be impaired. 0°C to 70°C. The LTC1921C is designed, characterized and expected to
Note 2:
Transient voltage for less than 10µs. This parameter is not 100% meet specified performance from –40°C to 85°C but is not tested or QA tested. Voltage should not exceed 200V between any two pins. sampled at these temperatures. The LTC1921I is guaranteed to meet
Note 3:
The LTC1921C and LTC1921I are guaranteed functional over the specified performance from –40 t0 85°C. operating temperature range of –40°C to 85°C.
Note 5:
All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to RTN unless otherwise specified.
W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Threshold Supply Current vs Supply Voltage Supply Current vs Temperature vs Temperature
400 180 –37.5 VA = VB = VFUSEA = VFUSEB IA + IB 350 160 –37.7 –37.9 300 140 µA) µA) –38.1 120 250 –38.3 100 200 IA, IB –38.5 80 150 –38.7 60 –38.9 SUPPLY CURRENT ( 100 SUPPLY CURRENT ( 40 VA = –48V V –39.1 B = –48V UNDERVOLTAGE THRESHOLD (V) 50 20 VFUSEA = –48V –39.3 VFUSEB = –48V 0 0 –39.5 0 10 20 30 40 50 60 70 80 90 100 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 1921 G01 1921 G02 1921 G04
Undervoltage Recovery Threshold Overvoltage Threshold Overvoltage Hysteresis vs Temperature vs Temperature vs Temperature
–42.5 –68.0 1.50 –42.6 –68.5 1.45 –42.7 1.40 –69.0 –42.8 1.35 –42.9 –69.5 1.30 –43.0 –70.0 1.25 –43.1 –70.5 1.20 –43.2 1.15 –71.0 –43.3 1.10 OVERVOLTAGE THRESHOLD (V) OVERVOLTAGE HYSTERESIS (V) –43.4 –71.5 1.05 UNDERVOLTAGE RECOVERY THRESHOLD (V) –43.5 –72.0 1.00 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1921 G04 1921 G05 1921 G06 1921f 3
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. (Note 5) RTN = 0V, VA = –48V, VB = –48V, FUSE A = –48V, FUSE B = –48V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Output Switch Off Leakage 500 pA Output Switch Resistance in Undervoltage Lockout, VA = VB = –10V, IOUT = 10mA ● 60 Ω OUT F, OUT A, OUT B VA = –10V, VB = 0V, IOUT = 10mA ● 80 Ω VA = 0V, VB = –10V, IOUT = 10mA ● 80 Ω
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
The LTC1921C is guaranteed to meet specified performance from of a device may be impaired. 0°C to 70°C. The LTC1921C is designed, characterized and expected to
Note 2:
Transient voltage for less than 10µs. This parameter is not 100% meet specified performance from –40°C to 85°C but is not tested or QA tested. Voltage should not exceed 200V between any two pins. sampled at these temperatures. The LTC1921I is guaranteed to meet
Note 3:
The LTC1921C and LTC1921I are guaranteed functional over the specified performance from –40 t0 85°C. operating temperature range of –40°C to 85°C.
Note 5:
All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to RTN unless otherwise specified.
W U TYPICAL PERFOR A CE CHARACTERISTICS Undervoltage Threshold Supply Current vs Supply Voltage Supply Current vs Temperature vs Temperature
400 180 –37.5 VA = VB = VFUSEA = VFUSEB IA + IB 350 160 –37.7 –37.9 300 140 µA) µA) –38.1 120 250 –38.3 100 200 IA, IB –38.5 80 150 –38.7 60 –38.9 SUPPLY CURRENT ( 100 SUPPLY CURRENT ( 40 VA = –48V V –39.1 B = –48V UNDERVOLTAGE THRESHOLD (V) 50 20 VFUSEA = –48V –39.3 VFUSEB = –48V 0 0 –39.5 0 10 20 30 40 50 60 70 80 90 100 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 SUPPLY VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 1921 G01 1921 G02 1921 G04
Undervoltage Recovery Threshold Overvoltage Threshold Overvoltage Hysteresis vs Temperature vs Temperature vs Temperature
–42.5 –68.0 1.50 –42.6 –68.5 1.45 –42.7 1.40 –69.0 –42.8 1.35 –42.9 –69.5 1.30 –43.0 –70.0 1.25 –43.1 –70.5 1.20 –43.2 1.15 –71.0 –43.3 1.10 OVERVOLTAGE THRESHOLD (V) OVERVOLTAGE HYSTERESIS (V) –43.4 –71.5 1.05 UNDERVOLTAGE RECOVERY THRESHOLD (V) –43.5 –72.0 1.00 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 –50 –30 –10 10 30 50 70 90 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1921 G04 1921 G05 1921 G06 1921f 3
