Datasheet LT3470 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | Micropower Buck Regulator with Integrated Boost and Catch Diodes |
| Páginas / Página | 20 / 4 — ELECTRICAL CHARACTERISTICS. Note 1:. Note 3:. Note 4:. Note 2:. Note 5:. … |
| Revisión | E |
| Formato / tamaño de archivo | PDF / 483 Kb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. Note 1:. Note 3:. Note 4:. Note 2:. Note 5:. TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency, VOUT = 3.3V
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Versión de texto del documento
LT3470
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings are guaranteed over the –40°C to 125°C temperature range. LT3470H may cause permanent damage to the device. Exposure to any Absolute specifications are guaranteed over –40°C to 150°C temperature range. Maximum Rating condition for extended periods may affect device
Note 3:
Bias current flows out of the FB pin. reliability and lifetime.
Note 4:
This is the minimum voltage across the boost capacitor needed to
Note 2:
The LT3470E is guaranteed to meet performance specifications guarantee full saturation of the switch. from 0°C to 85°C. Specifications over the –40°C to 85°C operating
Note 5:
This parameter is assured by design and correlation with statistical temperature range are assured by design, characterization and process controls. correlation with statistical process controls. The LT3470I specifications
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency, VOUT = 3.3V Efficiency, VOUT = 5V VFB vs Temperature
90 90 1.260 L = TOKO D52LC 47µH L = TOKO D52LC 47µH TA = 25°C VIN = 7V TA = 25°C 80 VIN = 12V 80 VIN = 12V 1.255 70 70 VIN = 36V V V V IN = 24V IN = 36V IN = 24V 60 60 (V) 1.250 V FB EFFICIENCY (%) 50 EFFICIENCY (%) 50 1.245 40 40 30 30 1.240 0.1 1 10 100 0.1 1 10 100 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3470 G01 3470 G02 3470 G03
Top and Bottom Switch Current VIN Quiescent Current BIAS Quiescent Current Limits (VFB = 0V) vs Temperature vs Temperature (Bias > 3V) vs Temperature
400 50 30 350 25 40 300 BIAS < 3V 20 250 30 200 15 150 CURRENT (µA) 20 10 CURRENT LIMIT (mA) V IN BIAS CURRENT (µA) 100 BIAS > 3V 10 5 50 0 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3470 G04 3470 G05 3470 G06 Rev. E 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts
ELECTRICAL CHARACTERISTICS Note 1:
Stresses beyond those listed under Absolute Maximum Ratings are guaranteed over the –40°C to 125°C temperature range. LT3470H may cause permanent damage to the device. Exposure to any Absolute specifications are guaranteed over –40°C to 150°C temperature range. Maximum Rating condition for extended periods may affect device
Note 3:
Bias current flows out of the FB pin. reliability and lifetime.
Note 4:
This is the minimum voltage across the boost capacitor needed to
Note 2:
The LT3470E is guaranteed to meet performance specifications guarantee full saturation of the switch. from 0°C to 85°C. Specifications over the –40°C to 85°C operating
Note 5:
This parameter is assured by design and correlation with statistical temperature range are assured by design, characterization and process controls. correlation with statistical process controls. The LT3470I specifications
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency, VOUT = 3.3V Efficiency, VOUT = 5V VFB vs Temperature
90 90 1.260 L = TOKO D52LC 47µH L = TOKO D52LC 47µH TA = 25°C VIN = 7V TA = 25°C 80 VIN = 12V 80 VIN = 12V 1.255 70 70 VIN = 36V V V V IN = 24V IN = 36V IN = 24V 60 60 (V) 1.250 V FB EFFICIENCY (%) 50 EFFICIENCY (%) 50 1.245 40 40 30 30 1.240 0.1 1 10 100 0.1 1 10 100 –50 –25 0 25 50 75 100 125 LOAD CURRENT (mA) LOAD CURRENT (mA) TEMPERATURE (°C) 3470 G01 3470 G02 3470 G03
Top and Bottom Switch Current VIN Quiescent Current BIAS Quiescent Current Limits (VFB = 0V) vs Temperature vs Temperature (Bias > 3V) vs Temperature
400 50 30 350 25 40 300 BIAS < 3V 20 250 30 200 15 150 CURRENT (µA) 20 10 CURRENT LIMIT (mA) V IN BIAS CURRENT (µA) 100 BIAS > 3V 10 5 50 0 0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3470 G04 3470 G05 3470 G06 Rev. E 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts