LTC4217 Linear Technology, LTC4217 Datasheet
LTC4217
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LTC4217 Summary of contents
Page 1
... Swap controller, power MOSFET and current sense resistor in a single package for small form factor applications. A dedicated 12V version (LTC4217-12) contains preset 12V specifi c thresholds, while the standard LTC4217 allows adjustable thresholds. The LTC4217 provides separate inrush current control and an accurate (5%) 2A current limit with current fold- back limiting ...
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... SOLDERED, OTHERWISE θ GATE (Note 3) ........................................ –0.3V to 33V Operating Temperature Range LTC4217C ................................................ 0°C to 70°C LTC4217I.............................................. –40°C to 85°C – 10V or – 0. Junction Temperature (Notes 4, 5)........................ 125°C DD Storage Temperature Range DHC Package ..................................... –65°C to 125°C FE Package ........................................ – ...
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... DD LTC4217-12 Only LTC4217-12 Only, V Rising OUT LTC4217-12 Only 0V 26.5V OUT GATE 12V, LTC4217 Only OUT GATE 12V, LTC4217-12 Only OUT GATE Note 1.23V 1.23V 1.23V 20kΩ FB SET LTC4217 TEMPERATURE RANGE 0°C to 70°C – ...
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... Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability The denotes the specifi cations which apply over the full operating = 25° 12V unless otherwise noted CONDITIONS V = 1.2V, LTC4217 Only IN LTC4217-12 Only V Rising IN V Falling 2mA OUT ...
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... TEMPERATURE (°C) 4217 G04 Current Limit Adjustment ( OUT SET 2.5 2.0 1.5 1.0 0.5 0 1.2 1k 10k 100k R (Ω) SET 4217 G07 LTC4217 T = 25° 12V unless otherwise noted Low-High Threshold vs Temperature 1.234 1.232 = 3.3V DD 1.230 1.228 1.226 –50 – –12 –14 TEMPERATURE (°C) ...
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... LTC4217 www.DataSheet4U.com TYPICAL PERFORMANCE CHARACTERISTICS and Temperature 3.3V, 12V, 24V –50 – TEMPERATURE (° Temperature and V MON DD 105 V = 3.3V, 12V, 24V LOAD 100 –50 – TEMPERATURE (°C) Gate Drive ...
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... The LTC4217-12 version uses a fi xed internal divider with optional external adjustment for 12V operation. Open the pin if the LTC4217-12 thresholds are desired. If the voltage at this pin rises above 1.235V, an overvoltage is detected and the switch turns off. Tie to GND if unused. ...
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... UV 20k * + 0.62V RST – 224k * + OV OV 20k * – 1.235V – UVLO1 + 2.73V TIMER *LTC4217-12 (DFN) ONLY 8 SENSE (EXPOSED PAD) INTERNAL 20mΩ MOSFET – CHARGE PUMP CS INRUSH AND GATE + DRIVER OUT CM LOGIC + 0.2V TM1 – + TM2 – 1.235V GND ...
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... V to drive the UV and OV pins. DD This version also features a divider from OUT to drive the FB pin. The LTC4217-12 is available in the DFN package while the LTC4217 (adjustable version the DFN and TSSOP packages. The output voltage is monitored using the FB pin and the PG comparator to determine if the power is available for the load ...
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... C1 0.1μF Figure 1. 0.8A, 12V Card Resident Application After the power-on-reset pulse, the LTC4217 will go through the following sequence. First, the UV and OV pins must indicate that the input voltage is within the acceptable range. All of these conditions must be satisfi ed for the duration of 100ms to ensure that any contact bounce during the insertion has ended ...
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... MOSFET on as soon as TIMER pin has ramped below 0.2V. In this auto-retry mode the LTC4217 repeatedly tries to turn on after an overcurrent at a period determined by the capacitor on the TIMER pin. The auto-retry mode also functions when the TIMER pin ...
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... MOSFET current. pin open, the voltage at Monitor OV and UV Faults Protecting the load from an overvoltage condition is the main function of the OV pin. In the LTC4217-12 an internal resistive divider (driving the OV pin) connects to a compara- tor to turn off the MOSFET when the V pin and ground SET 15 ...
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... APPLICATIONS INFORMATION 12V Fixed Version In the LTC4217-12 the UV, OV and FB pins are driven by internal dividers which may need to be fi ltered to prevent false faults. By placing a bypass capacitor on these pins the faults are delayed by the RC time constant. Use the R value from the electrical table for this calculation. ...
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... CC and GND. Additional Applications The LTC4217 has a wide operating range from 2.9V to 26.5V. The UV, OV and PG thresholds are set with few resistors. All other functions are independent of supply voltage. Figure 8 shows a 3.3V application with a UV threshold of 2.87V threshold of 3.77V and a PG threshold of 3 ...
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... BSC (.020 – .030) (.0077 – .0118) 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT MILLIMETERS (INCHES) *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE LTC4217 R = 0.115 0.20 TYP 3.00 ±0.10 (2 SIDES) 1.65 ± 0.10 (2 SIDES) 8 0.75 ± ...
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... Channels, Hot Swap Controller LTC4221 Dual Hot Swap Controller/Sequencer LTC4230 Triple Channels, Hot Swap Controller Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 24V, 1.5A Card Resident Application V OUT DD LTC4217FE * FB 200k UV 24V FLT 3.24k OV 10k PG TIMER INTV I CC ...