Datasheet LTC3890-2 (Analog Devices) - 5

LTC3890-2
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, VRUN1,2 = 5V, EXTVCC = 0V unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS PGOOD1 and PGOOD2 Outputs
VPGL PGOOD Voltage Low IPGOOD = 2mA 0.2 0.4 V IPGOOD PGOOD Leakage Current VPGOOD = 5V ±1 µA VPG PGOOD Trip Level VFB with Respect to Set Regulated Voltage VFB Ramping Negative –13 –10 –7 % Hysteresis 2.5 % VFB with Respect to Set Regulated Voltage VFB Ramping Positive 7 10 13 % Hysteresis 2.5 % tPG Delay for Reporting a Fault 25 µs
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings may
Note 3:
TJ is calculated from the ambient temperature TA and power cause permanent damage to the device. Exposure to any Absolute Maximum dissipation PD according to the following formula: Ratings for extended periods may affect device reliability and lifetime. TJ = TA + (PD • 34°C/W)
Note 2:
The LTC3890-2 is tested under pulsed load conditions such that
Note 4:
The LTC3890-2 is tested in a feedback loop that servos VITH1,2 to a TJ ≈ TA. The LTC3890E-2 is guaranteed to meet performance specifications specified voltage and measures the resultant VFB. The specification at 85°C is not from 0°C to 85°C. Specifications over the –40°C to 125°C operating tested in production and is assured by design, characterization and correlation junction temperature range are assured by design, characterization and to production testing at other temperatures (125°C for the LTC3890E-2/ correlation with statistical process controls. The LTC3890I-2 is guaranteed LTC3890I-2, 150°C for the LTC3890H-2/LTC3890MP-2). For the LTC3890MP-2, over the –40°C to 125°C operating junction temperature range, the the specification at –40°C is not tested in production and is assured by design, LTC3890H-2 is guaranteed over the –40°C to 150°C operating junction characterization and correlation to production testing at –55°C. temperature range and the LTC3890MP-2 is tested and guaranteed over
Note 5:
Dynamic supply current is higher due to the gate charge being the –55°C to 150°C operating junction temperature range. delivered at the switching frequency. See Applications information. High junction temperatures degrade operating lifetimes; operating lifetime
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay is derated for junction temperatures greater than 125°C. Note that the times are measured using 50% levels. maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout,
Note 7:
The minimum on-time condition is specified for an inductor the rated package thermal impedance and other environmental factors. peak-to-peak ripple current ≥ 40% of IMAX (See Minimum On-Time Considerations in the Applications Information section). Rev. A For more information www.analog.com 5 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