Datasheet LT3470 (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | Micropower Buck Regulator with Integrated Boost and Catch Diodes |
| Páginas / Página | 20 / 3 — elecTrical characTerisTics The. denotes the specifications which apply … |
| Formato / tamaño de archivo | PDF / 292 Kb |
| Idioma del documento | Inglés |
elecTrical characTerisTics The. denotes the specifications which apply over the full operating
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LT3470
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 10V, VBOOST = 15V, VBIAS = 3V unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage ● 4 V Quiescent Current from VIN VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching ● 10 18 µA VBIAS = 0V, Not Switching 35 50 µA Quiescent Current from Bias VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching ● 25 60 µA VBIAS = 0V, Not Switching 0.1 1.5 µA FB Comparator Trip Voltage VFB Falling ● 1.228 1.250 1.265 V FB Pin Bias Current (Note 3) VFB = 1V, E- and I-Grade 35 80 nA ● 35 150 nA H-Grade ● 35 225 nA FB Voltage Line Regulation 4V < VIN < 40V 0.0006 0.01 %/V Minimum Switch Off-Time (Note 5) 500 ns Switch Leakage Current 0.7 1.5 µA Switch VCESAT ISW = 100mA (TS8 Package) 215 300 mV ISW = 100mA (DD8 Package) 215 mV Switch Top Current Limit VFB = 0V 250 325 435 mA Switch Bottom Current Limit VFB = 0V 225 mA Catch Schottky Drop ISH = 100mA (TS8 Package) 630 775 mV ISH = 100mA (DD8 Package) 630 mV Catch Schottky Reverse Leakage VSW = 10V 0.2 2 µA Boost Schottky Drop ISH = 30mA 650 775 mV Boost Schottky Reverse Leakage VSW = 10V, VBIAS = 0V 0.2 2 µA Minimum Boost Voltage (Note 4) ● 1.7 2.2 V BOOST Pin Current ISW = 100mA 7 12 mA SHDN Pin Current VSHDN = 2.5V 1 5 µA SHDN Input Voltage High 2.5 V SHDN Input Voltage Low 0.2 V
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 3470fd 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 10V, VSHDN = 10V, VBOOST = 15V, VBIAS = 3V unless otherwise specified. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage ● 4 V Quiescent Current from VIN VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching ● 10 18 µA VBIAS = 0V, Not Switching 35 50 µA Quiescent Current from Bias VSHDN = 0.2V 0.1 0.5 µA VBIAS = 3V, Not Switching ● 25 60 µA VBIAS = 0V, Not Switching 0.1 1.5 µA FB Comparator Trip Voltage VFB Falling ● 1.228 1.250 1.265 V FB Pin Bias Current (Note 3) VFB = 1V, E- and I-Grade 35 80 nA ● 35 150 nA H-Grade ● 35 225 nA FB Voltage Line Regulation 4V < VIN < 40V 0.0006 0.01 %/V Minimum Switch Off-Time (Note 5) 500 ns Switch Leakage Current 0.7 1.5 µA Switch VCESAT ISW = 100mA (TS8 Package) 215 300 mV ISW = 100mA (DD8 Package) 215 mV Switch Top Current Limit VFB = 0V 250 325 435 mA Switch Bottom Current Limit VFB = 0V 225 mA Catch Schottky Drop ISH = 100mA (TS8 Package) 630 775 mV ISH = 100mA (DD8 Package) 630 mV Catch Schottky Reverse Leakage VSW = 10V 0.2 2 µA Boost Schottky Drop ISH = 30mA 650 775 mV Boost Schottky Reverse Leakage VSW = 10V, VBIAS = 0V 0.2 2 µA Minimum Boost Voltage (Note 4) ● 1.7 2.2 V BOOST Pin Current ISW = 100mA 7 12 mA SHDN Pin Current VSHDN = 2.5V 1 5 µA SHDN Input Voltage High 2.5 V SHDN Input Voltage Low 0.2 V
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 3470fd 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Related Parts