Datasheet LTC3624, LTC3624-2 (Analog Devices) - 4

LTC3624/LTC3624-2
elecTrical characTerisTics The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C. (Note 2) VIN = 12V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VMODE/SYNC Pulse-Skipping Mode 0.3 V Burst Mode Operation VINTVCC – 0.4 V Forced Continuous Mode 1.0 VINTVCC – 1.2 V IMODE/SYNC MODE/SYNC Input Current 0 100 nA tSS Internal Soft-Start Time 1 ms ILIM Peak Current Limit VIN > 5V (E-, I-Grade) l 2.4 3 3.6 A VIN > 5V (H-Grade) l 2.3 A IFB FB Input Current 10 nA IFB(VOUT) Feedback Input Leakage Current Fixed Output Versions 2 10 µA VUVLO VINTVCC Undervoltage Lockout VIN Ramping Up 2.4 2.6 2.7 V VUVLO(HYS) VINTVCC Undervoltage Lockout Hysteresis 175 mV VOVLO VIN Overvoltage Lockout Rising l 18 19 20 V VOVLO(HYS) VIN Overvoltage Lockout Hysteresis 500 mV fOSC Oscillator Frequency LTC3624/LTC3624-3.3/LTC3624-5 0.92 1.08 MHz (E-, I-Grade) l 0.82 1.00 1.16 MHz (H-Grade) l 0.78 MHz LTC3624-2/LTC3624-23.3/LTC3624-25 2.05 2.45 MHz (E-, I-Grade) l 1.8 2.25 2.6 MHz (H-Grade) l 1.7 MHz fSYNC SYNC Capture Range LTC3624/LTC3624-3.3/LTC3624-5 50 150 % LTC3624-2/LTC3624-23.3/LTC3624-25 50 140 % VINTVCC VINTVCC LDO Output Voltage VIN > 4V 3.2 3.6 4.0 V ΔVPGOOD Power Good Range LTC3624/LTC3624-2 ±7.5 ±11.5 % LTC3624-3.3/LTC3624-5/LTC3624-23.3/ ±7.5 ±13 % LTC3624-25 RPGOOD Power Good Resistance 280 350 Ω tPGOOD PGOOD Delay PGOOD Low to High 0 Cycles PGOOD High to Low 32 Cycles
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings layout, the rated package thermal impedance and other environmental may cause permanent damage to the device. Exposure to any Absolute factors. TJ is calculated from the ambient, TA, and power dissipation, PD, Maximum Rating condition for extended periods may affect device according to the following formula: reliability and lifetime. TJ = TA + (PD • θJA)
Note 2:
The LTC3624/LTC3624-2 is tested under pulsed load conditions
Note 3:
The quiescent current in forced continuous mode does not include such that TJ ≈ TA. The LTC3624E/LTC3624E-2 is guaranteed to meet switching loss of the power FETs. specifications from 0°C to 85°C junction temperature. Specifications over
Note 4:
The LTC3624 is tested in a proprietary test mode that servos FB to the –40°C to 125°C operating junction temperature range are assured by the output of the error amplifier. design, characterization and correlation with statistical process controls. The LTC3624I/LTC3624I-2 is guaranteed over the –40°C to 125°C
Note 5:
This IC includes overtemperature protection that is intended to operating junction temperature range and the LTC3624H is guaranteed protect the device during momentary overload conditions. The maximum over the –40°C to 150°C operating junction temperature range. High rated junction temperature will be exceeded when overtemperature junction temperatures degrade operating lifetimes; operation lifetime is protection is active Continuous operation above the specified maximum decreased for junction temperatures greater than 125°C. Note that the operating junction temperature may impair device reliability. The maximum ambient temperature consistent with these specifications is overtemperature protection level is not production tested but guaranteed determined by specific operating conditions in conjunction with board by design. 36242fd 4 For more information www.linear.com/LTC3624 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts