Datasheet LTC3833 (Analog Devices) - 4

LTC3833
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at T + – A = 25°C. VIN = 15V, VFB = VOSNS – VOSNS , unless otherwise noted. (Note 4) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Gate Drivers
RTG(HI) TG Driver Pull-Up On-Resistance TG High 2.5 Ω RTG(LO) TG Driver Pull-Down On-Resistance TG Low 1.2 Ω RBG(HI) BG Driver Pull-Up On-Resistance BG High 2.5 Ω RBG(LO) BG Driver Pull-Down On-Resistance BG Low 0.8 Ω tDLY(OFF) Top Gate Off to Bottom Gate On (Note 6) 20 ns Delay Time tDLY(ON) Bottom Gate Off to Top Gate On (Note 6) 15 ns Delay Time
Internal VCC Regulator and External VCC
INTVCC Internal VCC Voltage 6V < VIN < 38V 5.1 5.3 5.55 V INTVCC (%) Internal VCC Load Regulation ICC = 0mA to 50mA –1 –2 % EXTVCC(TH) EXTVCC Switchover Voltage EXTVCC Rising 4.4 4.6 4.75 V EXTVCC(HYS) EXTVCC Switchover Hysteresis 200 mV ∆EXTVCC EXTVCC Voltage Drop VEXTVCC = 5V, ICC = 50mA 200 mV
PGOOD Output
PGDOV PGOOD Upper Threshold VFB Rising (with Respect to Regulated 5 7.5 10 % Feedback Voltage VREG) PGDUV PGOOD Lower Threshold VFB Falling (with Respect to Regulated –10 –7.5 –5 % Feedback Voltage VREG) PGDHYS PGOOD Hysteresis VFB Returning 2 % VPGD(LO) PGOOD Low Voltage IPGOOD = 5mA 0.15 0.4 V tPGD(FALL) Delay from OV/UV Fault to PGOOD Falling 20 µs tPGD(RISE) Delay from OV/UV Recovery to PGOOD 10 µs Rising
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
The LTC3833 is tested under pulsed loading conditions such may cause permanent damage to the device. Exposure to any Absolute that TJ ≈ TA. The LTC3833E is guaranteed to meet specifications from Maximum Rating condition for extended periods may affect device 0°C to 85°C junction temperature; specifications over the –40°C to reliability and lifetime. 125°C operating junction temperature range are assured by design,
Note 2:
The junction temperature (T characterization and correlation with statistical process controls. The J in °C) is calculated from the ambient temperature (T LTC3833I is guaranteed to meet specifications over the full –40°C to 125°C A in °C) and power dissipation (PD in Watts) as follows: T operating junction temperature range. Note that the maximum ambient J = TA + (PD • θJA) temperature consistent with these specifications is determined by specific where θJA (in °C/W) is the package thermal impedance provided in the Pin operating conditions in conjunction with board layout, the rated package Configuration section for the corresponding package. thermal impedance and other environmental factors.
Note 3:
This IC includes overtemperature protection that is intended to
Note 5:
The LTC3833 is tested in a feedback loop that adjusts protect the device during momentary overload conditions. The maximum V + – V – to achieve a specified error amplifier output voltage rated junction temperature will be exceeded when this protection is active. FB = VOSNS OSNS (on ITH pin). The specification at 85°C is not tested in production. This Continuous operation above the specified absolute maximum operating specification is assured by design, characterization and correlation to junction temperature may impair device reliability or permanently damage production testing at 125°C. the device.
Note 6:
Delay times are measured using 50% levels. 3833f 4