Datasheet LT3012B (Analog Devices) - 5

LT3012B
W U TYPICAL PERFOR A CE CHARACTERISTICS ADJ Pin Bias Current Current Limit Current Limit
50 1000 700 VOUT = 0V 45 900 600 40 800 35 700 TJ = 25°C 500 30 600 T 400 J = 125°C 25 500 300 20 400 15 CURRENT LIMIT (mA) 300 CURRENT LIMIT (mA) 200 ADJ PIN BIAS CURRENT (nA) 10 200 100 5 100 VIN = 7V VOUT = 0V 0 0 0 – 50 – 25 0 25 50 75 100 125 0 10 20 30 40 50 60 70 80 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3012B G13 3012B G14 3012B G15
Reverse Output Current Reverse Output Current Input Ripple Rejection
200 35 92 TJ = 25°C VIN = 0V 180 VIN = 0V VOUT = VADJ = 1.24V 30 88 µA) VOUT = VADJ 160 µA) 84 140 25 80 120 20 100 76 CURRENT FLOWS ADJ PIN CLAMP 15 80 INTO OUTPUT PIN (SEE APPLICATIONS 72 60 INFORMATION) 10 RIPPLE REJECTION (dB) 68 40 V REVERSE OUTPUT CURRENT ( REVERSE OUTPUT CURRENT ( IN = 4.5V + 0.5VP-P RIPPLE AT f = 120Hz 5 64 I 20 L = 250mA VOUT = 1.24V 0 0 60 0 1 2 3 4 5 6 7 8 9 10 – 50 – 25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 OUTPUT VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3012B G16 3012B G17 3012B G18
Input Ripple Rejection Minimum Input Voltage
100 4.0 VIN = 4.5V + 50mVRMS RIPPLE ILOAD = 250mA 90 ILOAD = 250mA 3.5 80 3.0 70 2.5 60 50 2.0 COUT = 10µF 40 1.5 30 RIPPLE REJECTION (dB) 1.0 20 MINIMUM INPUT VOLTAGE (V) C 0.5 10 OUT = 3.3µF 0 0 10 100 1k 10k 100k 1M – 50 – 25 0 25 50 75 100 125 FREQUENCY (Hz) TEMPERATURE (°C) 3012B G19 3012B G20 3012bf 5