Datasheet LTC3372 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | 60V Low IQ Buck Controller Plus 4-Channel 8A Configurable Buck DC/DCs |
| Páginas / Página | 44 / 6 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Revisión | A |
| Formato / tamaño de archivo | PDF / 5.7 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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LTC3372
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2), VIN = 12V, VRUN = 5V, VOUT = VINA-H = 3.3V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Temperature Monitor
VTEMP(ROOM) TEMP Voltage at 25°C 200 220 240 mV ∆VTEMP/°C VTEMP Slope 7 mV/°C OT Overtemperature Shutdown 170 °C OT Hyst Overtemperature Hysteresis 10 °C
Low Voltage (LV) Buck Regulators
VINA-H Input Operating Voltage l 2.25 5.5 V VOUT1-4 Regulated Output Voltage Set Point l 0.8 VINA-H V UVLO Undervoltage Lockout Threshold on VINA-H VINA-H Falling l 1.95 2.05 2.15 V VINA-H Rising l 2.05 2.15 2.25 V IQ(VINA-H) Quiescent Current into VINA-H Pins, Per Burst Mode, FB1-4 = 0.82V 25 35 µA Enabled LV Regulator (Note 8) Forced Continuous Mode, FB1-4 = 0V 400 550 µA ISD(VINA-H) Shutdown Current into VINA-H Pins 0 1 µA VFB1 Regulated Feedback Voltage for Regulator 1 l 792 800 808 mV VFB2-4 Regulated Feedback Voltage for Regulators l 780 800 820 mV 2-4 IFB1-4 Feedback Leakage Current FB1-4 = 0.85V –50 50 nA DMAX Maximum Duty Cycle FB1-4 = 0V l 100 % RPMOS PMOS On-Resistance ISW = 100mA, 1A – Per Power Stage 290 mΩ RNMOS NMOS On-Resistance ISW = –100mA, 1A – Per Power Stage 180 mΩ ILEAKP PMOS Leakage Current EN1-4 = GND –1 1 µA ILEAKN NMOS Leakage Current EN1-4 = GND –1 1 µA tSS Soft-Start Time (Note 10) 0.25 1.5 3 ms UV Rising Undervoltage RST Threshold % Relative to Regulated VFB l –4 –2 –1 % Regulator 1 Hysteresis 1 % Rising RST Undervoltage Threshold % Relative to Regulated VFB l –7 –5 –3 % Regulators 2-4 Hysteresis 1 % OV RST Overvoltage Threshold of Regulators % Relative to Regulated VFB l +5 +7.5 +10 % 1-4 Hysteresis –3 % ILIM PMOS Current Limit 1 Buck with 1 Power Stage (Note 9) 1.4 1.8 2.2 A 1 Buck with 2 Power Stages (Note 9) 3.6 A 1 Buck with 3 Power Stages (Note 9) 5.4 A 1 Buck with 4 Power Stages (Note 9) 7.2 A
Interface Logic Pins (RST, WDO, WDI, CT, C1, C2, C3)
IOH Output High Leakage Current RST, WDO 5.5V at Pin 1 µA VOL Output Low Voltage RST, WDO 3mA at Pin 0.1 0.4 V VIH WDI Input High Threshold l 1.2 V CT, C1, C2, C3 Input High Threshold l INTVCC – 0.4 V VIL WDI, C1, C2, C3 Input Low Threshold l 0.4 V tWDI(WIDTH) WDI Pulse Width l 80 ns Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Low Voltage Regulators Applications Information High Voltage Buck Controller Low Voltage Buck Regulators Printed Circuit Board PCB Layout Considerations Typical Applications Package Description Revision History 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 (Note 2), VIN = 12V, VRUN = 5V, VOUT = VINA-H = 3.3V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Temperature Monitor
VTEMP(ROOM) TEMP Voltage at 25°C 200 220 240 mV ∆VTEMP/°C VTEMP Slope 7 mV/°C OT Overtemperature Shutdown 170 °C OT Hyst Overtemperature Hysteresis 10 °C
Low Voltage (LV) Buck Regulators
VINA-H Input Operating Voltage l 2.25 5.5 V VOUT1-4 Regulated Output Voltage Set Point l 0.8 VINA-H V UVLO Undervoltage Lockout Threshold on VINA-H VINA-H Falling l 1.95 2.05 2.15 V VINA-H Rising l 2.05 2.15 2.25 V IQ(VINA-H) Quiescent Current into VINA-H Pins, Per Burst Mode, FB1-4 = 0.82V 25 35 µA Enabled LV Regulator (Note 8) Forced Continuous Mode, FB1-4 = 0V 400 550 µA ISD(VINA-H) Shutdown Current into VINA-H Pins 0 1 µA VFB1 Regulated Feedback Voltage for Regulator 1 l 792 800 808 mV VFB2-4 Regulated Feedback Voltage for Regulators l 780 800 820 mV 2-4 IFB1-4 Feedback Leakage Current FB1-4 = 0.85V –50 50 nA DMAX Maximum Duty Cycle FB1-4 = 0V l 100 % RPMOS PMOS On-Resistance ISW = 100mA, 1A – Per Power Stage 290 mΩ RNMOS NMOS On-Resistance ISW = –100mA, 1A – Per Power Stage 180 mΩ ILEAKP PMOS Leakage Current EN1-4 = GND –1 1 µA ILEAKN NMOS Leakage Current EN1-4 = GND –1 1 µA tSS Soft-Start Time (Note 10) 0.25 1.5 3 ms UV Rising Undervoltage RST Threshold % Relative to Regulated VFB l –4 –2 –1 % Regulator 1 Hysteresis 1 % Rising RST Undervoltage Threshold % Relative to Regulated VFB l –7 –5 –3 % Regulators 2-4 Hysteresis 1 % OV RST Overvoltage Threshold of Regulators % Relative to Regulated VFB l +5 +7.5 +10 % 1-4 Hysteresis –3 % ILIM PMOS Current Limit 1 Buck with 1 Power Stage (Note 9) 1.4 1.8 2.2 A 1 Buck with 2 Power Stages (Note 9) 3.6 A 1 Buck with 3 Power Stages (Note 9) 5.4 A 1 Buck with 4 Power Stages (Note 9) 7.2 A
Interface Logic Pins (RST, WDO, WDI, CT, C1, C2, C3)
IOH Output High Leakage Current RST, WDO 5.5V at Pin 1 µA VOL Output Low Voltage RST, WDO 3mA at Pin 0.1 0.4 V VIH WDI Input High Threshold l 1.2 V CT, C1, C2, C3 Input High Threshold l INTVCC – 0.4 V VIL WDI, C1, C2, C3 Input Low Threshold l 0.4 V tWDI(WIDTH) WDI Pulse Width l 80 ns Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Low Voltage Regulators Applications Information High Voltage Buck Controller Low Voltage Buck Regulators Printed Circuit Board PCB Layout Considerations Typical Applications Package Description Revision History Typical Application Related Parts