Datasheet LT4363 (Analog Devices) - 4

LT4363
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
IFB FB Input Current VFB = 1.275V l ±0.2 ±1 µA ΔVSNS Current Limit Sense Voltage VCC = 12V, OUT = 3V to 12V l 45 50 55 mV ΔVSNS = (SNS – OUT) VCC = 48V, OUT = 3V to 48V l 48 53 58 mV Current Limit Foldback VCC = 12V, OUT = 0V to 1V l 15 25 35 mV VCC = 48V, OUT = 0V to 1V l 16 27 36 mV ISNS SNS Input Current OUT = SNS = 3V to 80V l 20 40 µA OUT = SNS = 0V l –10 –15 µA ITMR TMR Pull-up Current, Overvoltage TMR = 1V, FB = 1.5V, ΔVDS = 0.5V l –1.7 –4 –6 µA TMR = 1V, FB = 1.5V, ΔVDS = 75V l –42 –50 –58 µA TMR Pull-up Current, OV Warning TMR = 1.325V, FB = 1.5V, ΔVDS = 0.5V l –3 –5 –7 µA TMR Pull-up Current, Overcurrent TMR = 1V, ΔVSNS = 100mV, ΔVDS = 0.5V l –5 –9 –13 µA TMR = 1V, ΔVSNS = 100mV, ΔVDS = 80V l –190 –250 –310 µA TMR Pull-up Current, Cool Down TMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V l –1 –2.3 –3.5 µA TMR Pin Pull-down Current, Cool Down VTMR = 3V, FB = 1.5V, ΔVSNS = 0V, ΔVDS = 0V l 1 2 4 µA VTMR(F) TMR Fault Threshold TMR Rising l 1.235 1.275 1.31 V VTMR(G) TMR Gate Off Threshold TMR Rising l 1.335 1.375 1.41 V VTMR(R) TMR Restart Threshold TMR Falling, LT4363-2 l 0.47 0.5 0.53 V ΔVTMR Early Warning Window VTMR(G) – VTMR(F) l 80 100 120 mV VTMR(H) TMR Cool Down High Threshold VCC = 7V to 80V, TMR Rising l 3.5 4.3 5.4 V VUV UV Input Threshold UV Rising l 1.24 1.275 1.31 V VUV(HYST) UV Input Hysteresis 12 mV VOV OV Input Threshold OV Rising l 1.24 1.275 1.31 V VOV(HYST) OV Input Hysteresis 7.5 mV IIN UV, OV Input Current UV = 1.275V l ±0.2 ±1 µA UV = –60V l –1 –2 mA ILEAK FLT, ENOUT Leakage Current FLT, ENOUT = 80V l ±0.5 ±2.5 µA VOL FLT, ENOUT Output Low ISINK = 0.1mA l 300 800 mV ISINK = 2mA l 2 9 V ΔVOUT(TH) OUT High Threshold ΔVOUT = VCC – VOUT, ENOUT From Low to High l 0.25 0.5 0.75 V ΔVOUT(RST) OUT Reset Threshold ENOUT From High to Low l 1.8 2.7 3.6 V IOUT OUT Input Current VCC = OUT = 12V, SHDN Open l 0.25 0.5 mA VCC = OUT = 12V, SHDN = 0V l 0.25 1 mA VSHDN SHDN Threshold VCC = 4V to 80V 0.6 1.4 1.7 V l 0.4 2.1 V VSHDN(Z) SHDN Open Voltage VCC = 4V to 80V l 2.2 V ISHDN SHDN Current SHDN = 0.4V l –1 –4 –8 µA tRESET SHDN Reset Time SHDN ≤ 0.4V; LT4363-1 l 100 µs D Retry Duty Cycle; Overvoltage VCC = 80V, OUT = 16V, FB = 1.5V; LT4363-2 l 1 2 % Retry Duty Cycle; Output Short VCC = 12V, OUT = 0V, ∆VSNS = 100mV; LT4363-2 l 0.76 1 % tOFF(UV) Undervoltage Turn Off Propagation Delay UV Steps from 1.5V to 1V l 2 5 µs tOFF(OV) Overvoltage Turn Off Propagation Delay FB Steps from 0V to 1.5V; OUT = 0V l 0.25 1 µs tOFF(OC) Overcurrent Turn Off Propagation Delay ∆VSNS Steps from 0V to 150mV; OUT = 0V l 1 2.5 µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 2:
All currents into device pins are positive, all currents out of device pins may cause permanent damage to the device. Exposure to any Absolute are negative. All voltages are referenced to GND unless otherwise specified. Maximum Rating condition for extended periods may affect device
Note 3:
An internal clamp limits the GATE pin to a minimum of 10V above reliability and lifetime. the OUT pin. Driving this pin to voltages beyond the clamp may damage the device. 4363fb 4 For more information www.linear.com/LT4363 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 Typical Application Related Parts