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Si4842DY Datasheet(PDF) 3 Page - Analog Devices |
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Si4842DY Datasheet(HTML) 3 Page - Analog Devices |
3 / 40 page ![]() Data Sheet ADP1878/ADP1879 Rev. A | Page 3 of 40 SPECIFICATIONS All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). VREG = 5 V, BST − SW = VREG − VRECT_DROP (see Figure 40 to Figure 42). VIN = 12 V. The specifications are valid for TJ = −40°C to +125°C, unless otherwise specified. Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit POWER SUPPLY CHARACTERISTICS High Input Voltage Range VIN CVIN = 22 μF(25 V rating) right at Pin 1 to PGND (Pin 11) ADP1878ACPZ-0.3-R7/ADP1879ACPZ-0.3-R7 (300 kHz) 2.95 12 20 V ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz) 2.95 12 20 V ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz) 3.25 12 20 V Quiescent Current IQ_REG + IQ_BST FB = 1.5 V, no switching 1.1 mA Shutdown Current IREG,SD + IBST,SD EN < 600 mV 140 225 μA Undervoltage Lockout UVLO Rising VIN (see Figure 35 for temperature variation) 2.65 V UVLO Hysteresis Falling VIN from operational state 178 mV INTERNAL REGULATOR CHARACTERISTICS Do not load VREG externally because it is intended to bias internal circuitry only VREG Operational Output Voltage VREG CVREG = 4.7 μF to PGND, 0.22 μF to GND, VIN = 2.95 V to 20 V ADP1878ACPZ-0.3-R7/ADP1879ACPZ-0.3-R7 (300 kHz) 2.75 5 5.5 V ADP1878ACPZ-0.6-R7/ADP1879ACPZ-0.6-R7 (600 kHz) 2.75 5 5.5 V ADP1878ACPZ-1.0-R7/ADP1879ACPZ-1.0-R7 (1.0 MHz) 3.05 5 5.5 V VREG Output in Regulation VIN = 7 V, 100 mA 4.82 4.981 5.16 V VIN = 12 V, 100 mA 4.83 4.982 5.16 V Load Regulation 0 mA to 100 mA, VIN = 7 V 32 mV 0 mA to 100 mA, VIN = 20 V 34 mV Line Regulation VIN = 7 V to 20 V, 20 mA 1.8 mV VIN = 7 V to 20 V, 100 mA 2.0 mV VIN to VREG Dropout Voltage 100 mA out of VREG, VIN ≤ 5 V 306 415 mV Short VREG to PGND VIN = 20 V 229 320 mA SOFT START Connect external capacitor from SS pin to GND, Soft Start Period Calculation CSS = 10 nF/ms 10 nF/ms ERROR AMPLIFER FB Regulation Voltage VFB TJ = 25°C 600 mV TJ = −40°C to +85°C 596 600 604 mV TJ = −40°C to +125°C 594.2 600 605.8 mV Transconductance Gm 320 496 670 μS FB Input Leakage Current IFB, LEAK FB = 0.6 V, EN = VREG 1 50 nA CURRENT SENSE AMPLIFIER GAIN Programming Resistor (RES) Value from RES to PGND RES = 47 kΩ ± 1% 2.7 3 3.3 V/V RES = 22 kΩ ± 1% 5.5 6 6.5 V/V RES = none 11 12 13 V/V RES = 100 kΩ ± 1% 22 24 26 V/V SWITCHING FREQUENCY Typical values measured at 50% time points with 0 nF at DRVH and DRVL; maximum values are guaranteed by bench evaluation1 ADP1878ACPZ-0.3-R7/ ADP1879ACPZ-0.3-R7 300 kHz On Time VIN = 5 V, VOUT = 2 V, TJ = 25°C 1120 1200 1345 ns Minimum On Time VIN = 20 V 145 190 ns Minimum Off Time 84% duty cycle (maximum) 340 400 ns |
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