Datasheet LTC7801 (Analog Devices) - 8

LTC7801
Typical perForMance characTerisTics Shutdown Current DRVCC Line Regulation Shutdown Current vs Temperature vs Input Voltage
11 20 30 EXTVCC = 0V VIN = 12V DRVSET = INTV 18 CC 10 25 16 14 9 20 12 TAGE (V) NDRV FET 8 10 15 VOL No NDRV FET CC 8 7 DRV 10 6 DRVSET = 0V SHUTDOWN CURRENT (µA) 4 SHUTDOWN CURRENT (µA) VIN = 6.3V 6 5 2 5 0 0 0 15 30 45 60 75 90 105 120 135 150 –75 –50 –25 0 25 50 75 100 125 150 0 15 30 45 60 75 90 105 120 135 150 INPUT VOLTAGE (V) TEMPERATURE (°C) INPUT VOLTAGE (V) 7801 G19 7801 G20 7801 G21
Oscillator Frequency SS Pull-Up Current Quiescent Current vs Temperature vs Temperature vs Temperature
100 600 12.0 VIN = 12V 90 BURST MODE OPERATION 11.5 550 80 FREQ = INTVCC 11.0 70 DRVSET = 70kΩ 500 60 10.5 DRVSET = INTVCC 50 450 10.0 40 9.5 DRVSET = 0V FREQUENCY (kHz) 400 30 SS CURRENT (µA) QUIESCENT CURRENT (µA) 9.0 20 350 10 FREQ = 0V 8.5 0 300 8.0 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 7801 G22 7801 G23 7801 G24
Boost Charge Pump Voltage BOOST Charge Pump Charging BOOST Charge Pump Charging vs SW Voltage Current vs Frequency Current vs SW Voltage
10 100 100 VBOOST = 16V FREQ = 350kHz 9 90 VSW = 12V 90 8 80 80 7 70 70 TAGE (V) 6 60 60 5 50 50 4 40 40 VBOOST - VSW = 4V 3 150°C 30 30 25°C V (BOOST - SW) VOL BOOST - VSW = 7V 2 –55°C 20 150°C 20 150°C FREQ = 350kHz 1 25°C 10 25°C 10 10MΩ BETWEEN BOOST AND SW CHARGE PUMP CHARGING CURRENT (µA) –55°C CHARGE PUMP CHARGING CURRENT (µA) –55°C 0 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 100 200 300 400 500 600 700 800 900 1000 0 5 10 15 20 25 30 35 40 45 50 55 60 65 SW VOLTAGE (V) OPERATING FREQUENCY (kHz) SW VOLTAGE (V) 7801 G25 7801 G26 7801 G27 7801f 8 For more information www.linear.com/LTC7801 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts