Datasheet LT3763 (Analog Devices) - 4

LT3763
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VEN/UVLO = 5V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Output Current Monitor
Sense Voltage V – ISMON Regulated to 1V, VSENSE = 10V 45 50 55 mV (V + – – SENSE – VSENSE ) VISMON Regulated to 200mV, VSENSE = 10V 5 10 15 mV
Input Current Monitor
Sense Voltage V + IVINMON Regulated to 1V, VIVIN = 12V 46 50 54 mV (V + – + IVIN – VIVIN ) VIVINMON Regulated to 200mV, VIVIN = 12V 6 10 14 mV Input Current Limit Sense Voltage l 45 50 55 mV (V + – IVIN – VIVIN )
PWM Driver
PWM_OUT Driver On-Resistance VINTVCC = 5V Gate Pull-Up 2.2 Ω Gate Pull-Down 0.9 Ω PWM to PWM_OUT Propagation Delay VINTVCC = 5V Rising 11 ns Falling 38 ns
Current Control Loop gm Amp
Offset Voltage V – SENSE = 4V, VCTRL1 = 0V l –3 0 3 mV Input Common Mode Range VCM(LOW) (Note 5) 0 V V + – CM(HIGH) VCM(HIGH) Measured from VIN to VCM, VSENSE = VSENSE 1.4 V Output Impedance 3.5 MΩ gm l 375 475 625 µA/V Differential Gain 1.7 V/mV
Overvoltage
FB Overvoltage Protection (VFB Maximum) 1.515 V
Overcurrent
Overcurrent Protection V – SENSE = 0V, RT = 221kΩ 85 mV (V + – SENSE – VSENSE Maximum)
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This IC includes overtemperature protection that is intended to may cause permanent damage to the device. Exposure to any Absolute protect the device during momentary overload conditions. The maximum Maximum Rating condition for extended periods may affect device rated junction temperature will be exceeded when this protection is active. reliability and lifetime. Continuous operation above the specified absolute maximum operating
Note 2:
The LT3763E is guaranteed to meet performance specifications junction temperature may impair device reliability or permanently damage from 0°C to 125°C junction temperature. Specifications over the –40°C the device. to 125°C operating junction temperature range are assured by design,
Note 4:
The minimum on- and off-times are guaranteed by design and are characterization and correlation with statistical process controls. The not tested. LT3763I is guaranteed to meet performance specifications over the
Note 5:
The minimum common mode voltage is guaranteed by design and –40°C to 125°C operating junction temperature range. The LT3763H is is not tested. guaranteed over the –40°C to 150°C operating junction temperature range. High junction temperatures degrade operating lifetimes; operating lifetime is derated for junction temperatures greater than 125°C. Rev. C 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts