Datasheet LT3575 (Analog Devices) - 3

LT3575
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 = 12V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
IREF Reference Current Measured at RFB Pin with RREF = 6.49k 190 μA Error Amplifi er Voltage Gain VIN = 3V 150 V/V Error Amplifi er Transconductance ΔI = 10μA, VIN = 3V 150 μmhos Minimum Switching Frequency VC = 0.35V 40 kHz TC Current into RREF RTC = 20.1k 27.5 μA BIAS Pin Voltage IBIAS = 30mA 2.9 3 3.1 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings to 125°C operating junction temperature range are assured by design may cause permanent damage to the device. Exposure to any Absolute characterization and correlation with statistical process controls. The Maximum Rating condition for extended periods may affect device LT3575I is guaranteed over the full –40°C to 125°C operating junction reliability and lifetime. temperature range.
Note 2:
The LT3575E is guaranteed to meet performance specifi cations
Note 3:
Current fl ows out of the RREF pin. from 0°C to 125°C junction temperature. Specifi cations over the –40°C
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Output Voltage Quiescent Current Bias Pin Voltage
5.20 8 3.2 VIN = 40V 5.15 7 VIN = 40V WITH BIAS = 20V 3.0 VIN = 12V 5.10 6 2.8 5.05 5 (V) V 5.00 IN = 5V WITH BIAS = 5V (mA) 4 2.6 OUTV I Q 4.95 3 BIAS VOLTAGE (V) 2.4 4.90 2 2.2 4.85 1 4.80 0 2.0 –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) 3575 G01 3575 G02 3575 G03 3575f 3