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36V Input with 60V Transient Protection, 1A(IOUT), 2.2MHz Step-Down DC/DC Converter Offers Quiescent Current of Only 75uA

Linear Technology Corporation announces the LT3682, a 1A, 36V input step-down switching regulator with input transient protection up to 60V.


Its Burst Mode® operation keeps quiescent current under 75uA in no load standby conditions. The LT3682's 3.6V to 36V input voltage range, with 60V transient ride through, makes it ideal for load dump and cold-crank conditions commonly found in automotive applications. Its 1.5A internal switch can deliver up to 1A of continuous output current to voltages as low as 0.8V.

The LT3682's BurstMode operation offers ultralow quiescent current which is well suited for applications such as automotive or telecom systems, which demand always-on operation and optimum battery life. Switching frequency is user programmable from 250kHz to 2.2MHz enabling the designer to optimize efficiency while avoiding critical noise-sensitive frequency bands. The combination of its 3mm x 4mm DFN-14 package and high switching frequency keeps external inductors and capacitors small, providing a very compact, thermally efficient footprint.

The LT3682 utilizes a high efficiency 1.5A, 480mohm switch, with the boost diode, oscillator, control and logic circuitry integrated into a single die. Low ripple BurstMode operation maintains high efficiency at low output currents while keeping output ripple below 15mVPK-PK

  36V (60V Transient Protection), 1A (IOUT), 2.2MHz Step-Down Switching Regulator

Summary of Features: LT3682
Wide Input Range:
    • Operation from 3.6V to 36V
    • Overvoltage Lockout Protects Circuits through 60V     Transients
1A Output Current
Low Ripple(< 15mVP-P) Burst Mode® Operation:
IQ = 75uA at 12VIN to 3.3VOUT
Adjustable Switching Frequency: 250kHz to 2.2MHz
Short-Circuit Protected
Synchronizable Between 300kHz to 2.2MHz
0.8V Feedback Reference Voltage
Output Voltage 0.8V to 20V
Soft-Start Capability
Power Good Flag
Small 10-Pin Thermally Enhanced 3mm × 3mm DFN Package

 Links & Datasheet

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