Datasheet LTC3630A (Analog Devices) - 3

LTC3630A
e lecTrical characTerisTics The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply (VIN)
VIN Input Voltage Operating Range 4 76 V VOUT Output Voltage Operating Range (Note 7) 0.8 VIN V UVLO VIN Undervoltage Lockout VIN Rising l 3.45 3.65 3.85 V VIN Falling l 3.30 3.5 3.70 V Hysteresis 150 mV IQ DC Supply Current (Note 5) Active Mode 165 350 µA Sleep Mode No Load 12 20 µA Shutdown Mode VRUN = 0V 5 10 µA VRUN RUN Pin Threshold Voltage RUN Rising 1.17 1.21 1.25 V RUN Falling 1.06 1.10 1.14 V Hysteresis 110 mV
Output Supply (VFB)
VFB(ADJ) Feedback Comparator Threshold Voltage VFB Rising, VPRG1 = VPRG2 = 0V (Adjustable Output) LTC3630AE, LTC3630AI l 0.792 0.800 0.808 V LTC3630AH, LTC3630AMP l 0.788 0.800 0.812 V VFBH Feedback Comparator Hysteresis VFB Falling, VPRG1 = VPRG2 = 0V l 2.5 5 7 mV (Adjustable Output) IFB Feedback Pin Current VFB = 1V, VPRG1 = 0V, VPRG2 = 0V –10 0 10 nA VFB(FIXED) Feedback Comparator Threshold Voltages VFB Rising, VPRG1 = SS, VPRG2 = 0V l 4.940 5.015 5.090 V (Fixed Output) VFB Falling, VPRG1 = SS, VPRG2 = 0V l 4.910 4.985 5.060 V VFB Rising, VPRG1 = 0V, VPRG2 = SS l 3.260 3.310 3.360 V VFB Falling, VPRG1 = 0V, VPRG2 = SS l 3.240 3.290 3.340 V VFB Rising, VPRG1 = VPRG2 = SS l 1.780 1.810 1.840 V VFB Falling, VPRG1 = VPRG2 = SS l 1.770 1.8 1.83 V ∆VLINEREG Feedback Voltage Line Regulation VIN = 4V to 76V 0.001 %/V
Operation
IPEAK Peak Current Comparator Threshold ISET Floating l 1 1.2 1.4 A 100k Resistor from ISET to GND l 0.45 0.6 0.75 A ISET Shorted to GND l 0.09 0.12 0.15 A RON Power Switch On-Resistance Top Switch ISW = –200mA 1.00 Ω Bottom Switch ISW = 200mA 0.53 Ω ILSW Switch Pin Leakage Current RUN = Open, VIN = 65V, SW = 0V 0.1 1 μA ISS Soft-Start Pin Pull-Up Current VSS < 2.5V 3 5 6 μA tINT(SS) Internal Soft-Start Time SS Pin Floating 0.8 ms
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings High junction temperatures degrade operating lifetimes; operating lifetime may cause permanent damage to the device. Exposure to any Absolute is derated for junction temperatures greater than 125°C. Note that the Maximum Rating condition for extended periods may affect device maximum ambient temperature consistent with these specifications is reliability and lifetime. determined by specific operating conditions in conjunction with board
Note 2:
The LTC3630A is tested under pulsed load conditions such that layout, the rated package thermal impedance and other environmental T factors. J ≈ TA. The LTC3630AE is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 125°C operating
Note 3:
The junction temperature (TJ, in °C) is calculated from the ambient junction temperature range are assured by design, characterization and temperature (TA, in °C) and power dissipation (PD, in Watts) according to correlation with statistical process controls. The LTC3630AI is guaranteed the formula: over the –40°C to 125°C operating junction temperature range, the TJ = TA + (PD • θJA) LTC3630AH is guaranteed over the –40°C to 150°C operating junction where θ temperature range and the LTC3630AMP is tested and guaranteed over the JA is 43°C/W for the DFN or 45°C/W for the MSOP. –55°C to 150°C operating junction temperature range. 3630afc For more information www.linear.com/LTC3630A 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