Datasheet LT1307, LT1307B (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | Single Cell Micropower 600kHz PWM DC/DC Converters |
| Páginas / Página | 20 / 3 — ELECTRICAL CHARACTERISTICS. The |
| Formato / tamaño de archivo | PDF / 383 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The
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Versión de texto del documento
LT1307/LT1307B
ELECTRICAL CHARACTERISTICS 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 = 1.1V, VSHDN = VIN, LT1307/LT1307B unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Duty Cycle 25°C, 0°C 80 84 % 70°C 76 % Switch Current Limit (Note 4) DC = 40% ● 0.6 1.25 A DC = 75% 0.5 A Switch VCESAT ISW = 500mA (25°C, 0°C) 295 350 mV ISW = 500mA (70°C) 400 mV Burst Mode Operation Switch Current Limit L = 10µH 100 mA (LT1307 Only) L = 22µH 50 mA Shutdown Pin Current VSHDN = VIN ● 2.5 4.0 µA VSHDN = 0V ● – 1.5 – 2.5 µA LBI Threshold Voltage ● 190 200 210 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 ● 5 25 nA Low-Battery Detector Gain 1MΩ Load (25°C, 0°C) 1000 3000 V/V 1MΩ Load (70°C) 500 V/V Switch Leakage Current VSW = 5V ● 0.01 3 µA Reverse Battery Current (Note 6) 750 mA
Commercial Grade TA = – 20
°
C, VIN = 1.1V, VSHDN = VIN, unless otherwise noted (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IQ Quiescent Current VFB = 1.3V, Not Switching (LT1307) 50 100 µA VFB = 1.3V, Not Switching (LT1307B) 1.1 1.6 mA VSHDN = 0V 1 3 µA VFB Feedback Voltage 1.195 1.22 1.245 V gm Error Amp Transconductance ∆I = 5µA 25 35 65 µmhos AV Error Amp Voltage Gain 35 100 V/V fOSC Switching Frequency 500 600 750 kHz Maximum Duty Cycle 80 84 % Switch VCESAT ISW = 500mA, VIN = 1.2V 250 350 mV Shutdown Pin Current VSHDN = VIN 2.5 4.0 µA VSHDN = 0V – 1.5 – 2.5 µA LBI Threshold Voltage 186 200 210 mV 1307fa 3
ELECTRICAL CHARACTERISTICS 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 = 1.1V, VSHDN = VIN, LT1307/LT1307B unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Duty Cycle 25°C, 0°C 80 84 % 70°C 76 % Switch Current Limit (Note 4) DC = 40% ● 0.6 1.25 A DC = 75% 0.5 A Switch VCESAT ISW = 500mA (25°C, 0°C) 295 350 mV ISW = 500mA (70°C) 400 mV Burst Mode Operation Switch Current Limit L = 10µH 100 mA (LT1307 Only) L = 22µH 50 mA Shutdown Pin Current VSHDN = VIN ● 2.5 4.0 µA VSHDN = 0V ● – 1.5 – 2.5 µA LBI Threshold Voltage ● 190 200 210 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 ● 5 25 nA Low-Battery Detector Gain 1MΩ Load (25°C, 0°C) 1000 3000 V/V 1MΩ Load (70°C) 500 V/V Switch Leakage Current VSW = 5V ● 0.01 3 µA Reverse Battery Current (Note 6) 750 mA
Commercial Grade TA = – 20
°
C, VIN = 1.1V, VSHDN = VIN, unless otherwise noted (Note 2). SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IQ Quiescent Current VFB = 1.3V, Not Switching (LT1307) 50 100 µA VFB = 1.3V, Not Switching (LT1307B) 1.1 1.6 mA VSHDN = 0V 1 3 µA VFB Feedback Voltage 1.195 1.22 1.245 V gm Error Amp Transconductance ∆I = 5µA 25 35 65 µmhos AV Error Amp Voltage Gain 35 100 V/V fOSC Switching Frequency 500 600 750 kHz Maximum Duty Cycle 80 84 % Switch VCESAT ISW = 500mA, VIN = 1.2V 250 350 mV Shutdown Pin Current VSHDN = VIN 2.5 4.0 µA VSHDN = 0V – 1.5 – 2.5 µA LBI Threshold Voltage 186 200 210 mV 1307fa 3