Datasheet LT1534 (Analog Devices) - 4

LT1534/LT1534-1
W U TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage (V Output Switch Saturation Voltage IN) Change in Maximum Switch vs Temperature vs Switch Current Current (ILIM) vs Duty Cycle
2.70 0 0.8 0.7 –100 150°C 2.65 25°C 0.6 85°C – 200 0.5 2.60 125°C 85°C 25°C (mA) –300 0.4 – 40°C 2.55 ∆I LIM 0.3 – 400 INPUT VOLTAGE (V) SWITCH VOLTAGE (V) 0.2 2.50 – 500 0.1 2.45 0 – 600 –50 –25 0 25 50 75 100 125 150 0 0.5 1.0 1.5 2.0 0 20 40 60 80 100 JUNCTION TEMPERATURE (°C) DUTY CYCLE (%) SWITCH CURRENT (A) 1534 G01 1534 G03 1533 G02
Feedback Voltage and Negative Feedback Voltage and Input Current vs Temperature Input Current vs Temperature
1.30 2.0 –2.30 35 1.29 1.8 FEEDBACK INPUT CURRENT ( –2.35 1.28 1.6 NFB IINPUT CURRENT ( –2.40 30 1.27 1.4 VNFB –2.45 1.26 1.2 VFB 1.25 1.0 –2.50 25 1.24 0.8 –2.55 1.23 0.6 µA) FEEDBACK VOLTAGE (V) IFB µ NEGATIVE FB VOLTAGE (V) –2.60 20 A) 1.22 0.4 –2.65 INFB 1.21 0.2 1.20 0 –2.70 15 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) 1533 G04 1533 G05
Error Amplifier Transconductance Switching Frequency vs vs Temperature Feedback Pin Voltage Error Amplifier Output Current (VC)
2000 100 500 TA = 25°C g 1900 m = ∆IVC /∆VFB 90 400 –40°C 1800 80 µA) 300 125°C 1700 70 200 25°C 1600 60 100 1500 50 0 1400 40 –100 1300 30 –200 TRANSCONDUCTANCE (mho) 1200 20 –300 ERROR AMPLIFIER OUTPUT ( 1100 SWITCHING FREQUENCY (% TYPICAL) 10 –400 1000 0 –500 –50 –25 0 25 50 75 100 125 150 0 0.1 0.2 0.3 0.4 0.5 0.6 –400 –300 –200 –100 0 100 200 300 400 TEMPERATURE (°C) FEEDBACK PIN VOLTAGE (V) FEEDBACK PIN VOLTAGE FROM NOMINAL (mV) 1534 G08 1534 G07 1533 G06 4