Datasheet LTC3616 (Analog Devices) - 4

LTC3616
e lecTrical 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 = 3.3V, RT/SYNC = SVIN unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VMODE Internal Burst Mode Operation 0.3 V (Note 9) Pulse-Skipping Mode SVIN – 0.3 V Forced Continuous Mode 1.1 SVIN • 0.58 V External Burst Mode Operation 0.45 0.8 V PGOOD Power Good Voltage Windows TRACK/SS = SVIN, Entering Window VFB Ramping Up –3 –6 % VFB Ramping Down 3 6 % TRACK/SS = SVIN, Leaving Window VFB Ramping Up 9 11 % VFB Ramping Down –9 –11 % tPGOOD Power Good Blanking Time Entering and Leaving Window 70 105 140 µs RPGOOD Power Good Pull-Down On-Resistance 8 17 33 Ω VRUN RUN Voltage Input High l 1 V Input Low l 0.4 V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
This parameter is tested in a feedback loop which servos VFB to may cause permanent damage to the device. Exposure to any Absolute the midpoint for the error amplifier (VITH = 0.75V). Maximum Rating condition for extended periods may affect device
Note 4:
External compensation on ITH pin. reliability and lifetime.
Note 5:
Tying the ITH pin to SVIN enables the internal compensation and
Note 2:
The LTC3616 is tested under pulsed load conditions such that TJ ≈ AVP mode. TA. The LTC3616E is guaranteed to meet specifications from 0°C to 85°C
Note 6:
Dynamic supply current is higher due to the internal gate charge junction temperature. Specifications over the –40°C to 125°C operating being delivered at the switching frequency. junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC3616I is
Note 7:
See description of the TRACK/SS pin in the Pin Functions section. guaranteed to meet specifications over the –40°C to 125°C operating
Note 8:
In sourcing mode the average output current is flowing out of SW junction temperature, the LTC3616H is guaranteed to meet specifications pin. In sinking mode the average output current is flowing into the SW Pin. over the –40°C to 150°C operating junction temperature range and the
Note 9:
See description of the MODE pin in the Pin Functions section. LTC36146MP is guaranteed and tested to meet specifications over the
Note 10:
Guaranteed by correlation and design to wafer level full –55°C to 150°C operating junction temperature range. High junction measurements for QFN packages. temperatures degrade operating lifetimes; operating lifetime is derated
Note 11:
This IC includes overtemperature protection that is intended for temperature greater than 125°C. Note that the maximum ambient to protect the device during momentary overload conditions. Junction temperature consistent with these specifications is determined by specific temperature will exceed 150°C when overtemperature protection is active. operating conditions in conjunction with board layout, the rated package Continuous operation above the specified maximum operating junction thermal impedance and other environmental factors. temperature may impair device reliability. The junction temperature (TJ) is calculated from the ambient temperature (TA) and power dissipation (PD) according to the formula: TJ = TA + (PD • θJA°C/W), where θJA is the package thermal impedance. The maximum ambient temperature is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors. 3616fc 4 For more information www.linear.com/LTC3616 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts