Datasheet LTC3607 (Analog Devices) - 3

LTC3607
elecTrical characTerisTics The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, unless otherwise specified. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SVIN Operating Voltage Range l 4.5 15 V PVIN Operating Voltage Range l 4.5 15 V VOUT Output Voltage Range 0.6 PVIN V VFB Feedback Voltage (Note 3) 0.591 0.6 0.609 V l 0.588 0.6 0.612 V IFB Feedback Pin Input Current 30 nA ΔVLINE REG Reference Voltage Line Regulation VIN = 4.5V to 15V (Note 3) 0.1 0.15 %/V ΔVLOAD REG Output Voltage Load Regulation MODE/SYNC = 0V (Note 3) 0.5 % IS Input DC Supply Current (Note 4) Active Mode VFB1 = VFB2 = 0.5V 3.2 mA Sleep Mode (Both Channels) VFB1 = VFB2 = 0.64V 55 90 µA Sleep Mode (Single Channel) VFB(1 or 2) = 0.64V 35 60 µA Shutdown RUN1 = RUN2 = 0V 0.1 1 µA fOSC Oscillator Frequency VFB1, 2 = 0.6V l 1.8 2.25 2.7 MHz fSYNC Synchronization Frequency 1.0 4.0 MHz ILIM Peak Switch Current Limit VFB1, 2 = 0.5V, Duty Cycle < 35% 0.75 1 1.25 A RDS(ON) Top Switch On-Resistance (Note 6) 0.6 Ω Bottom Switch On-Resistance (Note 6) 0.25 Ω UVLO SVIN Undervoltage Lockout Threshold SVIN Rising 3.4 4.3 V PGOOD PGOOD1/2 Overvoltage Threshold VFB1, 2 Rising 8.5 11 % VFB1, 2 Hysteresis –3 % PGOOD1/2 Undervoltage Threshold VFB1, 2 Ramping Down –11 –8.5 % VFB1, 2 Hysteresis 3 % PGOOD1/2 On-Resistance Channel 1 or Channel 2 Active 70 Ω RUN1 = RUN2 = 0V 700 Ω tPGOOD Power Good Blanking Time 64 Cycles IPGOOD PGOOD Leakage 1 µA VRUN RUN1/2 VIL l 0.55 V RUN1/2 VIH l 3.0 V IRUN RUN1/2 Leakage Current l 0.01 1 µA VMODE/SYNC MODE/SYNC VIL l 0.3 V MODE/SYNC VIH l 1.0 V tSOFTSTART Internal Soft-Start Time VFB from 10% to 90% Full Scale 0.35 ms PVIN1 = PVIN2 = SVIN = 4.5V
Note 1.
Stresses beyond those listed under Absolute Maximum Ratings specific operating conditions in conjunction with board layout, the rated may cause permanent damage to the device. Exposure to any Absolute package thermal resistance and other environmental factors. Maximum Rating condition for extended periods may affect device
Note 3.
The LTC3607 is tested in a proprietary test mode that connects reliability and lifetime. VFB to the output of the error amplifier to an external servo loop.
Note 2.
The LTC3607 is tested under pulsed load conditions such that
Note 4.
Dynamic supply current is higher due to the internal gate charge TJ ≈ TA. The LTC3607E is guaranteed to meet specifications from being delivered at the switching frequency. 0°C to 85°C junction temperature. Specifications over the –40°C to
Note 5.
T 125°C operating junction temperature range are assured by design, J is calculated from the ambient TA and power dissipation PD according to the fol owing formula: T characterization and correlation with statistical process controls. The J = TA + (PD • θJA). LTC3607I is guaranteed over the full –40°C to 125°C operating junction
Note 6.
The QFN switch on-resistance is guaranteed by correlation to wafer level measurements. temperature range. The junction temperature (T
Note 7.
This IC includes overtemperature protection that is intended J) is calculated from the ambient temperature (T to protect the device during momentary overload conditions. Junction A) and power dissipation (PD) according to the formula: temperature will exceed 125°C when overtemperature protection is active TJ = TA + (PD • θJA°C/W) Continuous operation above the specified maximum operating junction where θJA is the package thermal impedance. Note that the maximum temperature may impair device reliability. ambient temperature is consistent with these specifications determined by 3607fb For more information www.linear.com/LTC3607 3 Document Outline Features Description Applications 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