Datasheet LT1614 (Analog Devices) - 3

LT1614
ELECTRICAL CH C ARA TERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. Commercial Grade 0
°
C to 70
°
C. VIN = 1.5V, VSHDN = VIN unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch VCESAT ISW = 500mA (25°C, 0°C) 295 350 mV ISW = 500mA (70°C) 400 mV Shutdown Pin Current VSHDN = VIN 10 20 µA VSHDN = 0V – 5 – 10 µA LBI Threshold Voltage 190 200 210 mV ● 185 215 mV LBO Output Low ISINK = 10µA 0.1 0.25 V LBO Leakage Current VLBI = 250mV, VLBO = 5V 0.01 0.1 µA LBI Input Bias Current (Note 5) VLBI = 150mV 10 50 nA Low-Battery Detector Gain 1MΩ Load 1000 V/V Switch Leakage Current VSW = 5V 0.01 3 µA
Industrial Grade – 40
°
C to 85
°
C. VIN = 1.5V, VSHDN = VIN unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Quiescent Current 1 2 mA VSHDN = 0V 5 10 µA Feedback Voltage ● – 1.21 – 1.24 – 1.27 V NFB Pin Bias Current (Note 3) VNFB = – 1.24V ● – 2 – 4.5 – 7.5 µA Reference Line Regulation 1V ≤ VIN ≤ 2V 0.6 1.1 %/V 2V ≤ VIN ≤ 6V 0.3 0.8 %/V Minimum Input Voltage – 40°C 1.1 1.25 V 85°C 0.8 1.0 V Maximum Input Voltage ● 6 V Error Amp Transconductance ∆I = 5µA 16 µmhos Error Amp Voltage Gain 100 V/V Switching Frequency ● 500 600 750 kHz Maximum Duty Cycle ● 70 80 % Switch Current Limit (Note 4) 0.75 1.2 A Switch VCESAT ISW = 500mA (– 40°C) 250 350 mV ISW = 500mA (85°C) 330 400 mV Shutdown Pin Current VSHDN = VIN 10 20 µA VSHDN = 0V – 5 – 10 µA LBI Threshold Voltage ● 180 200 220 mV LBO Output Low ISINK = 10µA 0.1 0.25 V LBO Leakage Current VLBI = 250mV, VLBO = 5V 0.1 0.3 µA LBI Input Bias Current (Note 5) VLBI = 150mV 5 30 nA Low-Battery Detector Gain 1MΩ Load 1000 V/V Switch Leakage Current VSW = 5V 0.01 3 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Bias current flows out of NFB pin. of a device may be impaired.
Note 4:
Switch current limit guaranteed by design and/or correlation to
Note 2:
The LT1614C is guaranteed to meet specified performance from static tests. Duty cycle affects current limit due to ramp generator. 0°C to 70°C and is designed, characterized and expected to meet these
Note 5:
Bias current flows out of LBI pin. extended temperature limits, but is not tested at – 40°C and 85°C. The LT1614I is guaranteed to meet the extended temperature limits. 3