Datasheet LTC3025 (Analog Devices) - 4

LTC3025
TYPICAL PERFORMANCE CHARACTERISTICS VIN No Load Operating Current VIN Shutdown Current Adjust Voltage vs Temperature
14 7 405 VBIAS = 5V VBIAS = 5V VBIAS = 3.6V VOUT = 0.8V 404 V 12 6 IN = 1.5V I 403 OUT = 10μA 10 5 402 125°C –40°C 401 8 4 85°C (μA) (μA) 400 I IN 6 I IN 25°C 3 399 –40°C 25°C 4 2 398 ADJUST VOLTAGE (mV) 85°C 397 2 1 396 0 0 395 0.5 1.5 2.5 3.5 4.5 5.5 0.5 1.5 2.5 3.5 4.5 5.5 –50 –25 0 25 50 75 100 125 VIN (V) VIN (V) TEMPERATURE (°C) 3025 G04 3025 G05 3025 G06
Burst Mode DC/DC Buck Ripple SHDN Threshold vs Temperature Current Limit vs VIN Voltage Rejection
1000 1600 VBIAS = 3.6V 900 1400 VOUT = 0V VIN 800 AC 1200 100mV/DIV 700 VBIAS = 5V 1000 600 500 VBIAS = 2.5V 800 VOUT 400 AC 600 10mV/DIV 300 CURRENT LIMIT (mA) SHDN THRESHOLD (mV) 400 200 200 100 VIN = 1.8V 10μs/DIV 3025 G09 VOUT = 1.5V 0 0 COUT = 1μF –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 IOUT = 50mA TEMPERATURE (°C) VIN (V) 3025 G07 3025 G08
VIN Ripple Rejection BIAS Ripple Rejection vs Frequency vs Frequency
70 70 60 60 COUT = 10μF COUT = 10μF 50 50 40 40 COUT = 1μF 30 30 REJECTION (dB) REJECTION (dB) COUT = 1μF 20 20 VBIAS = 3.6V VBIAS = 3.6V V V 10 IN = 1.5V 10 IN = 1.5V VOUT = 1.2V VOUT = 1.2V IOUT = 100mA IOUT = 100mA 0 0 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M FREQUENCY (Hz) FREQUENCY (Hz) 3025 G10 3025 G11 3025fd 4