Datasheet LTC3626 (Analog Devices) - 4

LTC3626
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 3). PVIN = SVIN = 12V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PGOOD Good-to-Bad Threshold FB Rising 8 10 % FB Falling –8 –10 % PGOOD Bad-to-Good Threshold FB Rising –3 –5 % FB Falling 3 5 % Power Good Filter Time 20 40 μs RPGOOD PGOOD Pull-Down Resistance 10mA Load 20 Ω Switch Leakage Current VRUN = 0V 0.01 1 μA tSS Internal Soft-Start Time VFB from 10% to 90% Full Scale 400 700 μs ITRACK/SS TRACK/SS Pull-Up Current 1.4 μA MODE Threshold Voltage MODE VIH l 1.0 V MODE VIL l 0.4 V SYNC Threshold Voltage SYNC VIH l 1.4 V MODE Input Current MODE = 0V –1.5 μA MODE = INTVCC 1.5 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
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:
Guaranteed by long term current density limitations. junction temperature may impair device reliability or permanently damage
Note 3:
The LTC3626 is tested under pulsed load conditions such that the device. T
Note 5:
Output voltages above 6V are not optimized for controlled J ≈ TA. The LTC3626E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 125°C operating on-time operation. Refer to the Applications Information section for junction temperature range are assured by design, characterization, and further discussions related to the output voltage range. Verified at test by correlation with statistical process controls. The LTC3626I is guaranteed comparison of measured on-time to VON voltage. over the –40°C to 125°C operating junction temperature range. Note that
Note 6:
Tested in a proprietary test mode, where ISW flows through the the maximum ambient temperature consistent with these specifications synchronous switch only. is determined by specific operating conditions in conjunction with board
Note 7:
Guaranteed by design. layout, the rated package thermal impedance, and other environmental
Note 8:
Maximum allowed current draw when used as a regulated output factors. is 5mA. This supply is only intended to supply additional DC load currents as needed and not intended to regulate large transient or AC behavior as these waveforms may impact LTC3626 operation. 3626fa 4 For more information www.linear.com/LTC3626 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts