Datasheet LT1764A (Analog Devices) - 7

LT1764A Series
W U TYPICAL PERFOR A CE CHARACTERISTICS LT1764A-2.5 GND Pin Current LT1764A-3.3 GND Pin Current LT1764A GND Pin Current
200 200 150 TJ = 25°C TJ = 25°C TJ = 25°C VSHDN = VIN VSHDN = VIN VSHDN = VIN *FOR V *FOR V *FOR V 160 OUT = 2.5V 160 OUT = 3.3V 120 OUT = 1.21V RL = 0.4Ω RL = 0.83Ω RL = 1.1Ω IL = 3A* 120 IL = 3A* 120 IL = 3A* 90 R 80 80 60 L = 0.81Ω R IL = 1.5A* L = 3.57Ω R R L = 1.73Ω L = 1.66Ω RL = 2.2Ω RL = 4.71Ω I I GND PIN CURRENT (mA) L = 0.7A* I L = 0.7A* L = 1.5A* GND PIN CURRENT (mA) IL = 1.5A* IL = 0.7A* GND PIN CURRENT (mA) 40 40 30 0 0 0 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 1764 G18 1764 G19 1764 G20
SHDN Pin Threshold SHDN Pin Threshold GND Pin Current vs I (On-to-Off) LOAD (Off-to-On)
1.0 160 1.0 V I IN = VOUT(NOM) + 1V L = 1mA 0.9 0.9 140 0.8 0.8 IL = 3A 120 0.7 0.7 100 0.6 0.6 0.5 80 0.5 IL = 1mA 0.4 0.4 60 0.3 0.3 GND PIN CURRENT (mA) 40 SHDN PIN THRESHOLD (V) 0.2 SHDN PIN THRESHOLD (V) 0.2 20 0.1 0.1 0 0 0 0 0.5 1.0 1.5 2.0 2.5 3.0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE ( OUTPUT CURRENT (A) °C) TEMPERATURE (°C) 1764 G22 1764 G21 1764 G23
SHDN Pin Input Current SHDN Pin Input Current ADJ Pin Bias Current
10 10 4.0 VSHDN = 20V 9 9 3.5 µA) 8 µA) 8 µA) 3.0 7 7 2.5 6 6 5 5 2.0 4 4 1.5 3 3 1.0 2 2 ADJ PIN BIAS CURRENT ( SHDN PIN INPUT CURRENT ( SHDN PIN INPUT CURRENT ( 1 1 0.5 0 0 0 0 2 4 6 8 10 12 14 16 18 20 –50 –25 0 25 50 75 100 125 – 50 – 25 0 25 50 75 100 125 SHDN PIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 1764 G24 1764 G25 1756 G26 1764afb 7