Datasheet LTC7813 (Analog Devices) - 5

LTC7813
e lecTrical characTerisTics The
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denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2) VBIAS = 12V, VRUN1,2 = 5V, VEXTVCC = 0V, VDRVSET = 0V, VPRG2 = 0V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Oscillator and Phase-Locked Loop
Programmable Frequency RFREQ =25kΩ, PLLIN/MODE = DC Voltage 105 kHz Programmable Frequency RFREQ = 65kΩ, PLLIN/MODE = DC Voltage 375 440 505 kHz Programmable Frequency RFREQ = 105kΩ, PLLIN/MODE = DC Voltage 835 kHz Low Fixed Frequency VFREQ = 0V, PLLIN/MODE = DC Voltage 320 350 380 kHz High Fixed Frequency VFREQ = INTVCC, PLLIN/MODE = DC Voltage 485 535 585 kHz Synchronizable Frequency PLLIN/MODE = External Clock l 75 850 kHz PLLIN VIH PLLIN/MODE Input High Level PLLIN/MODE = External Clock l 2.5 V PLLIN VIL PLLIN/MODE Input Low Level PLLIN/MODE = External Clock l 0.5 V
BOOST2 Charge Pump
BOOST2 Charge Pump Available Output FREQ = 0V, PLLIN/MODE = INTVCC Current VBOOST2 = 16.5V, VSW2 = 12V 75 µA VBOOST2 = 19V, VSW2 = 12V 35 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
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 Ratings for extended periods may affect device reliability and rated junction temperature will be exceeded when this protection is active. lifetime. Continuous operation above the specified absolute maximum operating
Note 2:
The LTC7813 is tested under pulsed load conditions such that junction temperature may impair device reliability or permanently damage T the device. J ≈ TA. The LTC7813E is guaranteed to meet performance specifications from 0°C to 85°C. Specifications over the –40°C to 125°C operating
Note 4:
The LTC7813 is tested in a feedback loop that servos VITH1,2 to a junction temperature range are assured by design, characterization and specified voltage and measures the resultant VFB1,2. The specification at correlation with statistical process controls. The LTC7813I is guaranteed 85°C is not tested in production and is assured by design, characterization over the –40°C to 125°C operating junction temperature range, the and correlation to production testing at other temperatures (125°C for LTC7813H is guaranteed over the –40°C to 150°C operating junction the LTC7813E and LTC7813I, 150°C for the LTC7813H and LTC7813MP). temperature range and the LTC7813MP is tested and guaranteed over For the LTC7813I and LTC7813H, the specification at 0°C is not tested in the –55°C to 150°C operating junction temperature range. High junction production and is assured by design, characterization and correlation to temperatures degrade operating lifetimes; operating lifetime is derated production testing at –40°C. For the LTC7813MP, the specification at 0°C for junction temperatures greater than 125°C. Note that the maximum is not tested in production and is assured by design, characterization and ambient temperature consistent with these specifications is determined by correlation to production testing at –55°C. specific operating conditions in conjunction with board layout, the rated
Note 5:
Dynamic supply current is higher due to the gate charge being package thermal impedance and other environmental factors. The junction delivered at the switching frequency. See Applications information. temperature (TJ, in °C) is calculated from the ambient temperature
Note 6:
Rise and fall times are measured using 10% and 90% levels. Delay (TA, in °C) and power dissipation (PD, in Watts) according to the formula: times are measured using 50% levels TJ = TA + (PD • θJA)
Note 7:
The minimum on-time condition is specified for an inductor where θJA = 44°C. peak-to-peak ripple current >40% of IMAX (See Minimum On-Time Considerations in the Applications Information section).
Note 8:
Do not apply a voltage or current source to these pins. They must be connected to capacitive loads only, otherwise permanent damage may occur. 7813f For more information www.linear.com/LTC7813 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Applications Information Typical Applications Package Description Typical Application Related Parts