LTC4444 Linear Technology, LTC4444 Datasheet
LTC4444
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LTC4444 Summary of contents
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... MOSFETs when activated. The LTC4444 also contains adaptive shoot-through protection to prevent both MOSFETs from conducting simultaneously. The LTC4444 is available in the thermally enhanced 8-lead MSOP package. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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... LTC4444EMS8E#PBF LTC4444EMS8E#TRPBF LTC4444IMS8E#PBF LTC4444IMS8E#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: For more information on tape and reel specifi ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC4444E is guaranteed to meet specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTC4444I is guaranteed over the full – ...
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... LTC4444 TYPICAL PERFORMANCE CHARACTERISTICS V Supply Quiescent Current CC vs Voltage 450 T = 25°C A BOOST = 12V 400 TINP = BINP = GND 350 300 TINP(BINP) = 12V 250 200 150 100 SUPPLY VOLTAGE (V) CC 4444 G01 Boost Supply Current ...
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... TEMPERATURE (° 25°C A BOOST = GND PLH(BG PHL(BG 4444 G16 LTC4444 www.DataSheet4U.com Rise and Fall Time vs V Supply Voltage 25° BOOST = GND 3.3nF r(TG r(BG ...
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... LTC4444 TYPICAL PERFORMANCE CHARACTERISTICS Switching Supply Current vs Input Frequency 4 25° BOOST = 12V CC 3 GND 3.0 (TG SWITCHING) 2.5 (BG SWITCHING) 2.0 1.5 1.0 (TG SWITCHING) 0.5 I (BG SWITCHING) BOOST 0 200 400 0 SWITCHING FREQUENCY (kHz) PIN FUNCTIONS TINP (Pin 1): High Side Input Signal. Input referenced to GND. This input controls the high side driver output (TG) ...
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... However, care should be taken to keep both input pins (TINP and BINP) from any noise pickup, especially in high frequency, high voltage applications. The LTC4444 input buffers have high input impedance and draw negligible input current, simplifying the drive circuitry required for the inputs ...
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... LTC4444 OPERATION Output Stage A simplifi ed version of the LTC4444’s output stage is shown in Figure 1. The pull-up devices on the BG and TG outputs are NPN bipolar junction transistors (Q1 and Q2). The BG and TG outputs are pulled up to within an NPN V of their positive rails (V and BOOST, respectively). Both ...
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... and BG 2 avoid damage due to power dissipation, the LTC4444 includes a temperature monitor that will pull BG and TG low if the junction temperature rises above 160°C. Normal operation will resume when the junction temperature cools to less than 135°C. ...
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... D2: DIODES INC. 1N5819HW-7-F R1, R2: VISHAY DALE WSL2512R0250FEA sure to solder the Exposed Pad on the back side of the LTC4444 package to the board. Correctly soldered to a 2500mm LTC4444 has a thermal resistance of approximately 40°C/W for the MS8E package. Failure to make good thermal contact between the exposed back side and the copper board will result in thermal resistances far greater than 40° ...
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... TYP 0.53 ± 0.152 1.10 (.021 ± .006) (.043) DETAIL “A” MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) 0.65 TYP (.0256) BSC LTC4444 www.DataSheet4U.com 2.06 ± 0.102 (.081 ± .004) 1 1.83 ± 0.102 (.072 ± .004) 8 0.52 (.0205 REF 3.00 ± 0.102 (.118 ± .004) ...
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... Adjustable Gate Drive from 5V to 8V, 5V ≤ Peak Output Current 9.5V Gate Drive Supply, 38V Max Input Supply ● www.linear.com www.DataSheet4U.com V BIAS 12V 1μF 16V D1 3 2.2μF 100V V CC ×5 6 BOOST LTC4444 7 TG 0.22μ 16V 8 TS GND 9 + 22μF 16V TG1 × 8μH SW1 D5 10Ω ...