Datasheet LTC7803 (Analog Devices) - 4
| Fabricante | Analog Devices |
| Descripción | 40V Low IQ, 3MHz Synchronous Step-Down Controller with Spread Spectrum |
| Páginas / Página | 36 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Formato / tamaño de archivo | PDF / 1.6 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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Versión de texto del documento
LTC7803
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, RUN = 12V, EXTVCC = 0V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ISENSE+ SENSE+ Pin Current VSENSE+ = 3.3V ±1 µA ISENSE– SENSE1– Pin Current VSENSE– < 2.9V 2 µA 3.2V ≤ VSENSE– < INTVCC – 0.5V 30 µA VSENSE– > INTVCC + 0.5V 685 µA Soft-Start Charge Current VTRACK/SS = 0V 10 12.5 15 µA RUN Pin ON Threshold VRUN Rising l 1.15 1.2 1.25 V RUN Pin Hysteresis VRUN Falling 100 mV
DC Supply Current (Note 5)
VIN Shutdown Current RUN = 0V 1.2 µA VIN Sleep Mode Current SENSE– < 2.9V, EXTVCC = 0V 14 28 µA SENSE– ≥ 3.2V µA VIN Current, EXTVCC = 0V 5 µA VIN Current, EXTVCC ≥ 4.8V 1 µA EXTVCC Current, EXTVCC ≥ 4.8V 4 µA SENSE– Current 9 µA Pulse-Skipping or Forced Continuous Mode VIN 2 mA or EXTVCC Current (Note 3)
Gate Drivers
TG or BG On-Resistance Pull-up 3 Ω Pull-down 1.5 Ω TG or BG Transition Time (Note 6) Rise Time CLOAD = 3300pF 25 ns Fall Time CLOAD = 3300pF 15 ns TG Off to BG On Delay Synchronous Switch-On CLOAD = 3300pF Each Driver 15 ns Delay Time BG Off to TG On Delay Top Switch-On Delay CLOAD = 3300pF Each Driver 15 ns Time tON(MIN) TG Minimum On-Time (Note 7) 40 ns Maximum Duty Factor for TG FREQ = 0V 100 % Maximum Duty Factor for BG Output Overvoltage 100 % BOOST Charge Pump Available Output Current VBOOST = 16V, VSW = 12V, FREQ = 0V, 30 65 µA Forced Continuous Mode
INTVCC Low Dropout (LDO) Linear Regulator
INTVCC Regulation Point 4.95 5.15 5.35 V INTVCC Load Regulation ICC = 0mA to 50mA, VIN ≥ 6V 1 2 % ICC = 0mA to 50mA, VEXTVCC ≥ 6V 1 2 % EXTVCC LDO Switchover Voltage EXTVCC Rising 4.6 4.7 4.8 V EXTVCC Switchover Hysteresis EXTVCC Falling 250 mV UVLO Undervoltage Lockout INTVCC Rising l 4.15 4.25 4.35 V INTVCC Falling l 3.75 3.85 3.95 V Rev 0 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 Functional Diagram Operation Applications Information Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, RUN = 12V, EXTVCC = 0V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
ISENSE+ SENSE+ Pin Current VSENSE+ = 3.3V ±1 µA ISENSE– SENSE1– Pin Current VSENSE– < 2.9V 2 µA 3.2V ≤ VSENSE– < INTVCC – 0.5V 30 µA VSENSE– > INTVCC + 0.5V 685 µA Soft-Start Charge Current VTRACK/SS = 0V 10 12.5 15 µA RUN Pin ON Threshold VRUN Rising l 1.15 1.2 1.25 V RUN Pin Hysteresis VRUN Falling 100 mV
DC Supply Current (Note 5)
VIN Shutdown Current RUN = 0V 1.2 µA VIN Sleep Mode Current SENSE– < 2.9V, EXTVCC = 0V 14 28 µA SENSE– ≥ 3.2V µA VIN Current, EXTVCC = 0V 5 µA VIN Current, EXTVCC ≥ 4.8V 1 µA EXTVCC Current, EXTVCC ≥ 4.8V 4 µA SENSE– Current 9 µA Pulse-Skipping or Forced Continuous Mode VIN 2 mA or EXTVCC Current (Note 3)
Gate Drivers
TG or BG On-Resistance Pull-up 3 Ω Pull-down 1.5 Ω TG or BG Transition Time (Note 6) Rise Time CLOAD = 3300pF 25 ns Fall Time CLOAD = 3300pF 15 ns TG Off to BG On Delay Synchronous Switch-On CLOAD = 3300pF Each Driver 15 ns Delay Time BG Off to TG On Delay Top Switch-On Delay CLOAD = 3300pF Each Driver 15 ns Time tON(MIN) TG Minimum On-Time (Note 7) 40 ns Maximum Duty Factor for TG FREQ = 0V 100 % Maximum Duty Factor for BG Output Overvoltage 100 % BOOST Charge Pump Available Output Current VBOOST = 16V, VSW = 12V, FREQ = 0V, 30 65 µA Forced Continuous Mode
INTVCC Low Dropout (LDO) Linear Regulator
INTVCC Regulation Point 4.95 5.15 5.35 V INTVCC Load Regulation ICC = 0mA to 50mA, VIN ≥ 6V 1 2 % ICC = 0mA to 50mA, VEXTVCC ≥ 6V 1 2 % EXTVCC LDO Switchover Voltage EXTVCC Rising 4.6 4.7 4.8 V EXTVCC Switchover Hysteresis EXTVCC Falling 250 mV UVLO Undervoltage Lockout INTVCC Rising l 4.15 4.25 4.35 V INTVCC Falling l 3.75 3.85 3.95 V Rev 0 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 Functional Diagram Operation Applications Information Package Description Typical Application Related Parts