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ADP1851ACPZ-R7 数据表(PDF) 5 Page - Analog Devices |
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ADP1851ACPZ-R7 数据表(HTML) 5 Page - Analog Devices |
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5 / 24 page  Data Sheet ADP1851 Rev. B | Page 5 of 24 Parameter Symbol Test Conditions/Comments Min Typ Max Unit SYNC Logic Input Low 1.3 V SYNC Logic Input High 1.9 V SYNC Input Pull-Down Resistance RSYNC 1 MΩ GATE DRIVERS DH Rise Time CDH = 3 nF, VBST − VSW = 5 V 16 ns DH Fall Time CDH = 3 nF, VBST − VSW = 5 V 14 ns DL Rise Time CDL = 3 nF 16 ns DL Fall Time CDL = 3 nF 14 ns DH to DL Dead Time External 3 nF connected to DH and DL 25 ns DH or DL Driver RON, Sourcing Current1 RON_SOURCE Sourcing 2 A with a 100 ns pulse 2 Ω Sourcing 1 A with a 100 ns pulse, VIN = 3 V 2.3 Ω DH or DL Driver RON, Tempco TCRON VIN = 3 V or 12 V 0.3 %/°C DH or DL Driver RON, Sinking Current1 RON_SINK Sinking 2 A with a 100 ns pulse 1.5 Ω Sinking 1 A with a 100 ns pulse, VIN = 3 V 2 Ω DH Maximum Duty Cycle1 fOSC = 300 kHz 90 % fOSC = 1500 kHz 50 % Minimum DH On Time fOSC = 200 kHz to 1500 kHz 85 ns Minimum DH Off Time fOSC = 200 kHz to 1500 kHz 345 ns Minimum DL On Time fOSC = 200 kHz to 1500 kHz 295 ns COMP VOLTAGE RANGE COMP Pulse Skip Threshold VCOMP,THRES In pulse skip mode (PSM) 0.9 V COMP Clamp High Voltage VCOMP,HIGH 2.2 V THERMAL SHUTDOWN Thermal Shutdown Threshold TTMSD 155 °C Thermal Shutdown Hysteresis 20 °C OVERVOLTAGE AND POWER-GOOD THRESHOLDS FB Overvoltage Threshold VOV VFB rising 0.630 0.65 0.670 V FB Overvoltage Hysteresis 18 mV FB Undervoltage Threshold VUV VFB falling 0.525 0.55 0.575 V FB Undervoltage Hysteresis 15 mV SOFT START/TRACK SS/TRK Output Current ISS During startup 4.6 6.5 8.4 µA SS/TRK Pull-Down Resistor During a fault condition 3 kΩ SS/TRK Input Voltage Range1 0 5 V FB to SS/TRK Offset VSS/TRK = 0.1 V to 0.6 V; offset = VFB − VSS/TRK −10 +10 mV PGOOD PGOOD Pull-Up Resistor RPGOOD Internal pull-up resistor to VCCO 12.5 kΩ PGOOD Delay 12 µs Overvoltage or Undervoltage Minimum Duration Minimum duration required to trigger the PGOOD signal 10 µs ILIM Threshold Voltage1 Relative to PGND −5 0 +5 mV ILIM Output Current ILIM = PGND 45 50 55 µA Current Sense Blanking Period After DL goes high; current limit is not sensed during this period 100 ns INTEGRATED RECTIFIER (BOOST DIODE) RESISTANCE At 20 mA forward current 16 Ω ZERO CURRENT CROSS OFFSET (SW TO PGND)1 In pulse skip mode only; fOSC = 300 kHz 0 2 4 mV 1 Guaranteed by design. 2 Connect VIN to VCCO when VIN < 5.5 V. |
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