Datasheet LT3758, LT3758A (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | High Input Voltage, Boost, Flyback, SEPIC and Inverting Controller |
| Páginas / Página | 38 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Revisión | F |
| Formato / tamaño de archivo | PDF / 1.4 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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Versión de texto del documento
LT3758/LT3758A
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Range 5.5 100 V VIN Shutdown IQ SHDN/UVLO = 0V 0.1 1 µA SHDN/UVLO = 1.15V 6 µA VIN Operating IQ VC = 0.3V, RT = 41.2k 1.75 2.2 mA VIN Operating IQ with Internal LDO Disabled VC = 0.3V, RT = 41.2k, INTVCC = 7.5V 350 400 µA SENSE Current Limit Threshold l 100 110 120 mV SENSE Input Bias Current Current Out of Pin –65 µA
Error Amplifier
FBX Regulation Voltage (VFBX(REG)) FBX > 0V (Note 3) l 1.569 1.6 1.631 V FBX < 0V (Note 3) l –0.816 –0.800 –0.784 V FBX Overvoltage Lockout FBX > 0V (Note 4) 6 8 10 % FBX < 0V (Note 4) 7 11 14 % FBX Pin Input Current FBX = 1.6V (Note 3) 70 100 nA FBX = –0.8V (Note 3) –10 10 nA Transconductance gm (∆IVC/∆FBX) (Note 3) 230 µS VC Output Impedance (Note 3) 5 MΩ VFBX Line Regulation (∆VFBX/[∆VIN • VFBX(REG)]) FBX > 0V, 5.5V < VIN < 100V (Notes 3, 6) 0.006 0.025 %/V FBX < 0V, 5.5V < VIN < 100V (Notes 3, 6) 0.005 0.03 %/V VC Current Mode Gain (∆VVC/∆VSENSE) 5.5 V/V VC Source Current VC = 1.5V –15 µA VC Sink Current FBX = 1.7V 12 µA FBX = –0.85V 11 µA
Oscillator
Switching Frequency RT = 41.2k to GND, FBX = 1.6V 270 300 330 kHz RT = 140k to GND, FBX = 1.6V 100 kHz RT = 10.5k to GND, FBX = 1.6V 1000 kHz RT Voltage FBX = 1.6V 1.2 V Minimum Off-Time 220 ns Minimum On-Time 220 ns SYNC Input Low 0.4 SYNC Input High 1.5 SS Pull-Up Current SS = 0V, Current Out of Pin –10 µA
Low Dropout Regulator
INTVCC Regulation Voltage l 7 7.2 7.4 V INTVCC Undervoltage Lockout Threshold Falling INTVCC 4.3 4.5 4.7 V UVLO Hysteresis 0.5 V INTVCC Overvoltage Lockout Threshold 17.5 V INTVCC Current Limit VIN = 100V 11 16 22 mA VIN = 20V 50 mA INTVCC Load Regulation (∆VINTVCC /VINTVCC) 0 < IINTVCC < 10mA, VIN = 8V –1 –0.4 % INTVCC Line Regulation (∆VINTVCC /[∆VIN • VINTVCC]) 8V < VIN < 100V 0.005 0.02 %/V Dropout Voltage (VIN – VINTVCC) VIN = 6V, IINTVCC = 10mA 500 mV Rev F For more information www.analog.com 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts Typical Applications Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application 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 = 24V, SHDN/UVLO = 24V, SENSE = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Range 5.5 100 V VIN Shutdown IQ SHDN/UVLO = 0V 0.1 1 µA SHDN/UVLO = 1.15V 6 µA VIN Operating IQ VC = 0.3V, RT = 41.2k 1.75 2.2 mA VIN Operating IQ with Internal LDO Disabled VC = 0.3V, RT = 41.2k, INTVCC = 7.5V 350 400 µA SENSE Current Limit Threshold l 100 110 120 mV SENSE Input Bias Current Current Out of Pin –65 µA
Error Amplifier
FBX Regulation Voltage (VFBX(REG)) FBX > 0V (Note 3) l 1.569 1.6 1.631 V FBX < 0V (Note 3) l –0.816 –0.800 –0.784 V FBX Overvoltage Lockout FBX > 0V (Note 4) 6 8 10 % FBX < 0V (Note 4) 7 11 14 % FBX Pin Input Current FBX = 1.6V (Note 3) 70 100 nA FBX = –0.8V (Note 3) –10 10 nA Transconductance gm (∆IVC/∆FBX) (Note 3) 230 µS VC Output Impedance (Note 3) 5 MΩ VFBX Line Regulation (∆VFBX/[∆VIN • VFBX(REG)]) FBX > 0V, 5.5V < VIN < 100V (Notes 3, 6) 0.006 0.025 %/V FBX < 0V, 5.5V < VIN < 100V (Notes 3, 6) 0.005 0.03 %/V VC Current Mode Gain (∆VVC/∆VSENSE) 5.5 V/V VC Source Current VC = 1.5V –15 µA VC Sink Current FBX = 1.7V 12 µA FBX = –0.85V 11 µA
Oscillator
Switching Frequency RT = 41.2k to GND, FBX = 1.6V 270 300 330 kHz RT = 140k to GND, FBX = 1.6V 100 kHz RT = 10.5k to GND, FBX = 1.6V 1000 kHz RT Voltage FBX = 1.6V 1.2 V Minimum Off-Time 220 ns Minimum On-Time 220 ns SYNC Input Low 0.4 SYNC Input High 1.5 SS Pull-Up Current SS = 0V, Current Out of Pin –10 µA
Low Dropout Regulator
INTVCC Regulation Voltage l 7 7.2 7.4 V INTVCC Undervoltage Lockout Threshold Falling INTVCC 4.3 4.5 4.7 V UVLO Hysteresis 0.5 V INTVCC Overvoltage Lockout Threshold 17.5 V INTVCC Current Limit VIN = 100V 11 16 22 mA VIN = 20V 50 mA INTVCC Load Regulation (∆VINTVCC /VINTVCC) 0 < IINTVCC < 10mA, VIN = 8V –1 –0.4 % INTVCC Line Regulation (∆VINTVCC /[∆VIN • VINTVCC]) 8V < VIN < 100V 0.005 0.02 %/V Dropout Voltage (VIN – VINTVCC) VIN = 6V, IINTVCC = 10mA 500 mV Rev F For more information www.analog.com 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Applications Related Parts Typical Applications Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts