Datasheet LT1307, LT1307B (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | Single Cell Micropower 600kHz PWM DC/DC Converters |
| Páginas / Página | 20 / 4 — ELECTRICAL CH. ARA TERISTICS. The |
| Formato / tamaño de archivo | PDF / 383 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CH. ARA TERISTICS. The
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Versión de texto del documento
LT1307/LT1307B
ELECTRICAL CH C ARA TERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. Industrial Grade – 40
°
C to 85
°
C. VIN = 1.1V, VSHDN = VIN, LT1307/LT1307B unless otherwise noted. 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 1.8 mA VSHDN = 0V ● 1 3 µA VFB Feedback Voltage ● 1.195 1.22 1.245 V IB FB Pin Bias Current (Note 3) VFB = VREF ● 10 27 100 nA Reference Line Regulation 1V ≤ VIN ≤ 2V (– 40°C) 0.6 1.1 %/V 1V ≤ VIN ≤ 2V (85°C) 3.2 %/V 2V ≤ VIN ≤ 5V ● 0.3 0.8 %/V Minimum Input Voltage – 40°C 1.1 1.2 V 85°C 0.8 1.0 V Input Voltage Range ● 5 V gm Error Amp Transconductance ∆I = 5µA ● 25 35 65 µmhos AV Error Amp Voltage Gain – 40°C 35 V/V 85°C 30 V/V fOSC Switching Frequency ● 500 600 750 kHz Maximum Duty Cycle – 40°C 80 84 % 85°C 75 80 % Switch Current Limit (Note 4) DC = 40% ● 0.6 1.25 A DC = 75% 0.5 A Switch VCESAT ISW = 500mA, VIN = 1.2V (– 40°C) 250 350 mV ISW = 500mA (85°C) 330 400 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 ● 186 200 210 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 (– 40°C) 1000 6000 V/V 1MΩ Load (85°C) 400 V/V Switch Leakage Current VSW = 5V ● 0.01 3 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Switch current limit guaranteed by design and/or correlation to of a device may be impaired. static tests. Duty cycle affects current limit due to ramp generator.
Note 2:
Specifications for commercial (C) grade devices are guaranteed
Note 5:
Bias current flows out of LBI pin. but not tested at – 20°C. MS8 package devices are designed for and
Note 6:
The LT1307/LT1307B will withstand continuous application of intended to meet commercial temperature range specifications but are not 1.6V applied to the GND pin while VIN and SW are grounded. tested at – 20°C or 0°C.
Note 3:
Bias current flows into FB pin. 1307fa 4
ELECTRICAL CH C ARA TERISTICS The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. Industrial Grade – 40
°
C to 85
°
C. VIN = 1.1V, VSHDN = VIN, LT1307/LT1307B unless otherwise noted. 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 1.8 mA VSHDN = 0V ● 1 3 µA VFB Feedback Voltage ● 1.195 1.22 1.245 V IB FB Pin Bias Current (Note 3) VFB = VREF ● 10 27 100 nA Reference Line Regulation 1V ≤ VIN ≤ 2V (– 40°C) 0.6 1.1 %/V 1V ≤ VIN ≤ 2V (85°C) 3.2 %/V 2V ≤ VIN ≤ 5V ● 0.3 0.8 %/V Minimum Input Voltage – 40°C 1.1 1.2 V 85°C 0.8 1.0 V Input Voltage Range ● 5 V gm Error Amp Transconductance ∆I = 5µA ● 25 35 65 µmhos AV Error Amp Voltage Gain – 40°C 35 V/V 85°C 30 V/V fOSC Switching Frequency ● 500 600 750 kHz Maximum Duty Cycle – 40°C 80 84 % 85°C 75 80 % Switch Current Limit (Note 4) DC = 40% ● 0.6 1.25 A DC = 75% 0.5 A Switch VCESAT ISW = 500mA, VIN = 1.2V (– 40°C) 250 350 mV ISW = 500mA (85°C) 330 400 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 ● 186 200 210 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 (– 40°C) 1000 6000 V/V 1MΩ Load (85°C) 400 V/V Switch Leakage Current VSW = 5V ● 0.01 3 µA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
Switch current limit guaranteed by design and/or correlation to of a device may be impaired. static tests. Duty cycle affects current limit due to ramp generator.
Note 2:
Specifications for commercial (C) grade devices are guaranteed
Note 5:
Bias current flows out of LBI pin. but not tested at – 20°C. MS8 package devices are designed for and
Note 6:
The LT1307/LT1307B will withstand continuous application of intended to meet commercial temperature range specifications but are not 1.6V applied to the GND pin while VIN and SW are grounded. tested at – 20°C or 0°C.
Note 3:
Bias current flows into FB pin. 1307fa 4