LTC3537

RECOMMENDED FOR NEW DESIGNS

LTC3537

2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO

RECOMMENDED FOR NEW DESIGNS

Efﬁciency and Power Loss vs Load Current slide

Efﬁciency and Power Loss vs Load Current

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Features

High Efficiency Step-Up DC/DC Converter and LDO

Step-Up

V_IN: 0.68V to 5V, V_OUT: 1.5V to 5.25V
I_OUT: 100mA at 3.3V, V_IN >0.8V
2.2MHz Fixed Frequency Operation
Synchronous Rectifier with Output Disconnect
Burst Mode Operation (Pin Selectable)

Linear LDO Regulator

V_IN : 1.8V to 5.5V, V_OUT: 0.6V to 5V
I_OUT: 100mA
100mV Dropout Voltage at 50mA
24dB Ripple Rejection at f_SW

Combined

Power Good Indicators
Low-Battery Comparator
30μA I_Q
Low Proﬁle 3mm × 3mm × 0.75mm Package

Additional Details

The LTC3537 combines a high efficiency, 2.2MHz step-up DC/DC converter with an independent 100mA low dropout regulator (LDO). The step-up converter starts from an input voltage as low as 0.68V and contains an internal 0.4Ω switch and a 0.6Ω synchronous rectifier that disconnects from the output when disabled in shutdown.

A switching frequency of 2.2MHz minimizes solution footprint by allowing the use of tiny, low proﬁle inductors and ceramic capacitors. The current mode PWM design is internally compensated, reducing external parts count. Fixed frequency switching is maintained until a light load current is sensed, at which point Burst Mode^® operation is engaged to maximize efficiency. For low noise operation, Burst Mode Operation can be disabled. Anti-ring circuitry reduces EMI by damping the inductor in discontinuous mode. Additional features include a low shutdown current of under 1μA and thermal overload protection.

The integrated LDO regulator provides a very low noise, programmable low dropout supply.

Applications

Wireless Microphones
Portable Medical instruments
Noise Cancelling/Portable Headsets
RF and Audio Power

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $2.90

Technical Documents 3

LTC3537: 2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO Data Sheet 12/07/2012

R415 Reliability Data 03/23/2018

DC1242A - Demo Manual 09/24/2009

Design Resources 2

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3537EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3537EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3537EUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3537EUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

DC1242A

LTC3537EUD | 600mA (I sw) Synchronous Boost Converter and 100mA LDO in 3mmmm x 3mm QFN

DC1242A

LTC3537EUD | 600mA (I sw) Synchronous Boost Converter and 100mA LDO in 3mmmm x 3mm QFN

Buy Now View Details

Product Detail

DC1242A: Demo Board for the LTC3537 - 2.2 MHz, 600mA Synchronous Step-Up DC/DC Converter and 100mA LDO

Resources

ZIP

DC1242A - Design File

650.00K

PDF

DC1242A - Demo Manual

385.00K

PDF

DC1242A - Schematic

36.00K

DC1242A

LTC3537EUD | 600mA (I sw) Synchronous Boost Converter and 100mA LDO in 3mmmm x 3mm QFN

LTspice 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.