Datasheet LT3837 (Analog Devices) - 4

LT3837
TYPICAL PERFORMANCE CHARACTERISTICS VCC Shutdown Current vs Temperature VCC Current vs Temperature SENSE Voltage vs Temperature
90 10 110 VUVLO = 0 FB = 1.1V 80 108 + 9 DYNAMIC CURRENT C SENSE = V PG SENSE WITH V – = 0V 70 CSG = 1nF, fOSC = 100kHz 106 SENSE 8 60 VCC = 14V 104 102 50 7 (mA) 100 40 CURRENT (µA) I VCC 6 98 V CC 30 STATIC PART CURRENT 5 SENSE VOLTAGE (mV) 96 20 94 4 10 92 VCC = 14V 0 3 90 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3837 G01 3837 G02 3837 G03
SENSE Fault Voltage Oscillator Frequency vs Temperature vs Temperature VFB vs Temperature
220 110 1.240 SENSE = V + SENSE COSC = 100pF 215 WITH V – 108 1.239 SENSE = 0V 106 1.238 210 104 1.237 – (mV) 205 102 1.236 SENSE 200 (kHz) 100 (V) 1.235 V FB + – V 195 f OSC 98 1.234 96 1.233 V SENSE 190 94 1.232 185 92 1.231 180 90 1.230 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3837 G04 3837 G05 3837 G06
Feedback Pin Input Bias Feedback Amplifier Output vs Temperature VFB Reset vs Temperature Current vs VFB
300 1.04 70 125°C 1.03 25°C 250 50 1.02 –40°C 30 200 1.01 10 150 1.00 (µA) RESET (V) I VC –10 V FB 0.99 100 –30 0.98 FEEDBACK PIN INPUT BIAS (nA) 50 0.97 –50 0 0.96 –70 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0.9 1 1.1 1.2 1.3 1.4 1.5 TEMPERATURE (°C) TEMPERATURE (°C) VFB (V) 3837 G07 3837 G08 3837 G09 3837fd 4 Document Outline features applications description Typical Application absolute maximum ratings Pin Configuration order information electrical characteristics typical performance characteristics pin functions block diagram flyback feedback amplifier timing diagram operation applications information typical application Package description Revision History related parts