Datasheet LT3511 (Analog Devices) - 3

LT3511
ELECTRICAL CHARACTERISTICS The
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denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VIN = 24V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Switching Frequency 40 kHz TC Current into RREF RTC = 53.6k 9.5 μA BIAS Pin Voltage Internally Regulated 3 3.1 3.2 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings to meet performance specifications from –40°C to 150°C operating may cause permanent damage to the device. Exposure to any Absolute junction temperature range. The LT3511MP is guaranteed over the full Maximum Rating condition for extended periods may affect device –55°C to 150°C operating junction range. High junction temperatures reliability and lifetime. degrade operating lifetimes. Operating lifetime is derated at junction
Note 2:
The LT3511E is guaranteed to meet performance specifications temperatures greater than 125°C. from 0°C to 125°C junction temperature. Specifications over the –40°C
Note 3:
Current flows out of the RREF pin. to 125°C operating junction temperature range are assured by design,
Note 4:
The SW pin is rated to 150V for transients. Operating waveforms characterization and correlation with statistical process controls. The of the SW pin should keep the pedestal of the flyback waveform below LT3511I is guaranteed to meet performance specifications from –40°C to 100V as shown in Figure 5. 125°C operating junction temperature range. The LT3511H is guaranteed
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Output Voltage Quiescent Current BIAS Pin Voltage
5.25 5 4.0 VIN = 48V 5.20 5.15 4 3.5 5.10 5.05 3 (V) 5.00 TAGE (V) (mA) 3.0 OUTV I Q 4.95 2 BIAS VOL 4.90 2.5 4.85 1 VIN = 24V 4.80 VIN = 48V VIN = 24V, 10mA VIN = 100V VIN = 24V, NO LOAD 4.75 0 2.0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 0 0 1 5 2 1 0 5 1 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3511 G01 3511 G02 3511 G03
Switch VCESAT Switch Current Limit Quiescent Current vs VIN
1000 400 4 MAXIMUM CURRENT LIMIT 350 800 300 3 600 250 VOLTAGE (mV) 200 (mA) 2 I Q CESAT 400 150 CURRENT LIMIT (mA) 100 1 SWITCH V 200 MINIMUM CURRENT LIMIT 50 0 0 0 0 50 100 150 200 250 300 350 –50 –25 0 25 50 5 7 0 0 1 5 2 1 0 5 1 0 20 40 60 80 100 SWITCH CURRENT (mA) TEMPERATURE (°C) VOLTAGE (V) 3511 G04 3511 G05 3511 G06 3511fc 3