Datasheet LT3473, LT3473A (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | Micropower 1A Boost Converter with Schottky and Output Disconnect |
| Páginas / Página | 12 / 3 — ELECTRICAL CHARACTERISTICS The |
| Formato / tamaño de archivo | PDF / 276 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS The
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LT3473/LT3473A
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3V, SHDN = 3V, CTRL = 2V, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Frequency 0.9 1.2 1.4 MHz Maximum Duty Cycle ● 88 92 % Switch Current Limit ● 1.2 A Switch VCESAT ISW = 100mA 45 mV Switch Leakage Current VSW = 5V 0.1 5 µA Schottky Forward Drop ID = 100mA 0.45 V Schottky Leakage Current CAP = 36V, SW = 0V 4 µA Disconnect PNP Voltage Drop IOUT = 100µA, CAP = 20V 80 mV IOUT = 50mA, CAP = 20V 250 mV Disconnect PNP Quiescent Current CAP = 20V 1.2 µA Disconnect PNP Leakage Current SHDN = OUT = 0V, CAP = 20V 0.01 0.1 µA
LTC3473A Only
NPN1 Voltage Drop INE1 = 1mA 0.8 V NPN1 Beta INE1 = 1mA 60 NPN2 Voltage Drop INE2 = 1mA 0.8 V NPN2 Beta INE2 = 1mA 60
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Failure to correctly solder the Exposed Pad of the package to the of a device may be impaired. PC board will result in a thermal resistance much higher than 40°C.
Note 2:
The LT3473EDD and LT3473AEDE are guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls.
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. Load Regulation (Feedback Taken from CAP) Feedback Voltage PGOOD Threshold Voltage
20.20 1.4 1.4 VIN = 3.6V 20.00 1.2 1.2 CAP 1.0 1.0 19.80 OUT 0.8 0.8 19.60 0.6 0.6 VOLTAGE (V) 19.40 0.4 0.4 FEEDBACK VOLTAGE (V) 19.20 0.2 PGOOD THRESHOLD VOLTAGE (V) 0.2 19.00 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 0.5 1 1.5 2 LOAD CURRENT (mA) CTRL VOLTAGE (V) CTRL VOLTAGE (V) 3473 G01 3473 G02 3473 G03 3473f 3
ELECTRICAL CHARACTERISTICS The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C. VIN = 3V, SHDN = 3V, CTRL = 2V, unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Frequency 0.9 1.2 1.4 MHz Maximum Duty Cycle ● 88 92 % Switch Current Limit ● 1.2 A Switch VCESAT ISW = 100mA 45 mV Switch Leakage Current VSW = 5V 0.1 5 µA Schottky Forward Drop ID = 100mA 0.45 V Schottky Leakage Current CAP = 36V, SW = 0V 4 µA Disconnect PNP Voltage Drop IOUT = 100µA, CAP = 20V 80 mV IOUT = 50mA, CAP = 20V 250 mV Disconnect PNP Quiescent Current CAP = 20V 1.2 µA Disconnect PNP Leakage Current SHDN = OUT = 0V, CAP = 20V 0.01 0.1 µA
LTC3473A Only
NPN1 Voltage Drop INE1 = 1mA 0.8 V NPN1 Beta INE1 = 1mA 60 NPN2 Voltage Drop INE2 = 1mA 0.8 V NPN2 Beta INE2 = 1mA 60
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 3:
Failure to correctly solder the Exposed Pad of the package to the of a device may be impaired. PC board will result in a thermal resistance much higher than 40°C.
Note 2:
The LT3473EDD and LT3473AEDE are guaranteed to meet performance specifications from 0°C to 70°C. Specifications over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls.
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C unless otherwise noted. Load Regulation (Feedback Taken from CAP) Feedback Voltage PGOOD Threshold Voltage
20.20 1.4 1.4 VIN = 3.6V 20.00 1.2 1.2 CAP 1.0 1.0 19.80 OUT 0.8 0.8 19.60 0.6 0.6 VOLTAGE (V) 19.40 0.4 0.4 FEEDBACK VOLTAGE (V) 19.20 0.2 PGOOD THRESHOLD VOLTAGE (V) 0.2 19.00 0 0 0 20 40 60 80 100 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 0 0.5 1 1.5 2 LOAD CURRENT (mA) CTRL VOLTAGE (V) CTRL VOLTAGE (V) 3473 G01 3473 G02 3473 G03 3473f 3