LT3681EDE#PBF Micropower Buck Regulators by Analog Devices

Status: Production
Series: LT3681
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The LT3681 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high efficiency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control, and logic circuitry. An undedicated power Schottky diode is integrated into the LT3681 to minimize the solution size. Current mode topology is used for fast transient response and good loop stability. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3681 can further enhance low output current efficiency by drawing bias current from the output when VOUT is above 3V. Shutdown reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3681 is available in 14-Pin 4mm x 3mm DFN package with exposed pads for low thermal resistance.

Where to Buy

Prices starting from US$4.37

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Analog Devices
from US$4.37
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Newark Electronics
from US$7.11
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element14
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Farnell
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Chip One Stop
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Richardson RFPD
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Features

Wide Input Voltage Range: 3.6V to 34V Operating, 36V Maximum
2A Maximum Output Current
Low Ripple Burst Mode® Operation
 50µA IQ at 12VIN to 3.3VOUT
 Output Ripple < 15mVP-P
Adjustable Switching Frequency: 300kHz to 2.8MHz
Low Shutdown Current: IQ < 1µA
Integrated Boost Diode
Integrated Power Schottky Diode
Power Good Flag
Saturating Switch Design: 0.18Ω On-Resistance
1.265V Feedback Reference Voltage
Output Voltage: 1.265V to 20V
Soft-Start Capability
Small 14-Pin Thermally Enhanced (4mm x 3mm) DFN Package

Alternative Descriptions

36V, 2A, 2.8MHz Buck Sw Reg w/ | Analog Devices
Dc/Dc Conv, Buck, 2.8Mhz, 85Deg C | Newark Electronics
DC/DC CONV, BUCK, 2.8MHZ, 85DEG C | element14
DC TO DC CONVERTER | Richardson RFPD


LT3681EDE#PBF Semiconductors - ICs by Linear Technology

BUCK 34VIN 2A 2.8MHZ ADJ 14DFN

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Topology Buck (Step Down)
Input Voltage Min 3.6V
Input Voltage Max 34V
No. of Outputs 1Outputs
DC / DC Converter IC Case DFN
No. of Pins 14Pins
Output Current 2A
Output Voltage Min 1.265V
Output Voltage Max 20V
Switching Frequency 2.8MHz
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 3681
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +85°C
Output Voltage 20V
Primary Input Voltage 34V

Frequently Asked Questions

Where can I find additional details, specifications and documents for a LT3681EDE#PBF?

Additional datasheets, footprints and schematics for LT3681EDE#PBF are listed on our Part Details page. You can also find images and similar parts to LT3681EDE#PBF on this page.

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What category does LT3681EDE#PBF fall under?

The LT3681EDE#PBF is listed under Micropower Buck Regulators.

Can I view similar or alternative parts?

You can view similar parts to LT3681EDE#PBF when available in the Micropower Buck Regulators range under the specifications section at the bottom of the details page.

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Is the LT3681EDE#PBF RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

Which authorised distributors for LT3681EDE#PBF have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and Chip One Stop have stock available or on a lead time for LT3681EDE#PBF.

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