Datasheet LT3512 (Analog Devices) - 3

LT3512
elecTrical characTerisTics The
l
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
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 LT3512E 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 LT3512I is guaranteed to meet performance specifications from –40°C to 100V as shown in Figure 5. 125°C operating junction temperature range. The LT3512H is guaranteed
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Output Voltage Quiescent Current BIAS Pin Voltage
5.25 8 4.0 VIN = 48V 5.20 5.15 6 3.5 5.10 5.05 (V) TAGE (V) 5.00 (mA) 4 3.0 V OUT I Q 4.95 BIAS VOL 4.90 2 2.5 4.85 VIN = 24V V 4.80 IN = 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 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3512 G01 3512 G02 3512 G03
Switch VCESAT Switch Current Limit Quiescent Current vs VIN
2000 800 5 MAXIMUM CURRENT LIMIT 700 1600 4 600 1200 500 3 VOLTAGE (mV) 400 (mA) I Q CESAT 800 300 2 CURRENT LIMIT (mA) 200 SWITCH V 400 MINIMUM CURRENT LIMIT 1 100 0 0 0 0 100 200 300 400 500 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 SWITCH CURRENT (mA) TEMPERATURE (°C) VOLTAGE (V) 3512 G04 3512 G05 3512 G06 3512fb 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts