Datasheet LTC3025 (Analog Devices) - 3

LTC3025
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = 1.5V, VBIAS = 3.6V, VOUT = 1.2V, COUT = 1μF, CIN = 0.1μF, CBIAS = 0.1μF (all capacitors ceramic) unless otherwise noted. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN to VOUT Dropout Voltage (Notes 4, 6, 7) VBIAS = 2.8V, VIN = 1.5V, VADJ = 0.37V, IOUT = 300mA l 45 100 mV VBIAS to VOUT Dropout Voltage (Note 4) l 1.4 V IOUT Continuous Output Current l 300 mA IOUT Current Limit VADJ = 0V 680 mA en Output Voltage Noise f = 10Hz to 100kHz, IOUT = 300mA 80 μVRMS VIH SHDN Input High Voltage l 0.9 V VIL SHDN Input Low Voltage l 0.3 V IIH SHDN Input High Current SHDN = 1.2V –1 1 μA IL SHDN Input Low Current SHDN = 0V –1 1 μA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
For the LTC3025, a regulated output voltage will only be available may cause permanent damage to the device. Exposure to any Absolute when the minimum IN and BIAS Operating Voltages as well as the IN to Maximum Rating condition for extended periods may affect device OUT and BIAS to OUT Dropout Voltages are all satisfi ed. reliability and lifetime.
Note 5:
Operating conditions are limited by maximum junction
Note 2:
This IC includes overtemperature protection that is intended temperature. The regulated output voltage specifi cation will not apply to protect the device during momentary overload conditions. Junction for all possible combinations of input voltage and output current. When temperature will exceed 125°C when overtemperature protection is active. operating at maximum input voltage, the output current range must be Continuous operation above the specifi ed maximum operating junction limited. When operating at maximum output current, the input voltage temperature may impair device reliability. range must be limited.
Note 3:
The LTC3025 regulator is tested and specifi ed under pulse
Note 6:
Dropout voltage is minimum input to output voltage differential load conditions such that TJ ≈ TA. The LTC3025 is 100% production needed to maintain regulation at a specifi ed output current. In dropout, the tested at 25°C. Performance at –40°C and 125°C is assured by design, output voltage will be equal to VIN – VDROPOUT. characterization and correlation with statistical process control. The
Note 7:
The DFN output FET on-resistance in dropout is guaranteed by LTC3025I is guaranteed to meet performance specifi cations over the full correlation to wafer level measurements. –40°C and 125°C operating junction temperature range.
TYPICAL PERFORMANCE CHARACTERISTICS Operating BIAS Current Dropout Voltage vs IOUT vs Output Load BIAS No Load Operating Current
70 400 80 VBIAS = 2.8V VIN = 1.5V VOUT = 1.2V 60 350 70 TA = 125°C 300 60 50 T 125°C A = 25°C 250 50 TAGE (mV) 40 125°C (μA) –40°C 25°C 200 (μA) 40 30 I BIAS 25°C I BIAS 150 30 TA = –40°C –40°C 20 DROPOUT VOL 100 20 10 50 10 0 0 0 0 50 100 150 200 250 300 0.01 0.1 1 10 100 1000 2.5 3 3.5 4 4.5 5 5.5 IOUT (mA) IOUT (mA) VBIAS (V) 3025 G01 3025 G02 3025 G03 3025fd 3