Datasheet LT1521, LT1521-3, LT1521-3.3, LT1521-5 (Analog Devices) - 7

LT1521/LT1521-3 LT1521-3.3/LT1521-5
W U TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Pin Threshold (Off-to-On) Shutdown Pin Current Shutdown Pin Input Current
2.0 3.0 25 V 1.8 SHDN = 0V ILOAD = 300mA 2.5 1.6 µA) 20 1.4 2.0 1.2 15 1.0 ILOAD = 1mA 1.5 0.8 10 1.0 0.6 0.4 SHUTDOWN PIN CURRENT ( 5 SHUTDOWN PIN THRESHOLD (V) 0.5 0.2 SHUTDOWN PIN INPUT CURRENT (mA) 0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 TEMPERATURE (°C) TEMPERATURE (°C) SHUTDOWN PIN VOLTAGE (V) LT1521 • TPC22 LT1521 • TPC23 LT1521 • TPC24
Adjust Pin Bias Current Reverse Output Current Current Limit
200 50 0.6 TJ = 25°C LT1521 V 175 45 VIN = 0V OUT = 0V µA) CURRENT FLOWS 0.5 40 150 INTO OUTPUT PIN 35 VOUT = VSENSE (LT1521-3/LT1521-3.3 0.4 125 30 LT1521-5) V 100 25 OUT = VADJ (LT1521) 0.3 LT1521-3.3 75 20 0.2 15 50 LT1521-3 10 SHORT-CIRCUIT CURRENT (A) ADJUST PIN BIAS CURRENT (nA) REVERSE OUTPUT CURRENT ( 0.1 25 5 LT1521-5 0 0 0 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 TEMPERATURE (°C) OUTPUT VOLTAGE (V) INPUT VOLTAGE (V) LT1521 • TPC25 LT1521 • TPC26 LT1521 • TPC27
Current Limit Reverse Output Current Ripple Rejection
0.6 8 66 V V IN = 7V VIN = 0V IN = VOUT (NOMINAL) + 1V + 0.5VP-P 7 64 RIPPLE AT f = 120Hz 0.5 VOUT = 0V VOUT = 3V (LT1521-3) V I µA) OUT = 3.3V (LT1521-3.3) LOAD = 150mA 6 VOUT = 5V (LT1521-5) 62 0.4 VOUT = 3.75V (LT1521) 5 60 0.3 4 58 3 0.2 56 2 RIPPLE REJECITON (dB) OUTPUT PIN CURRENT ( SHORT-CIRCUIT CURRENT (A) 0.1 1 54 0 0 52 –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) LT1521 • TPC28 LT1521 • TPC29 LT1521 • TPC30 1521335fb 7