LTC3536

RECOMMENDED FOR NEW DESIGNS

1A Low Noise, Buck-Boost DC/DC Converter

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Overview

  • Regulated Output with Input Voltage Above, Below or Equal to the Output Voltage
  • 1.8V to 5.5V Input and Output Voltage Range
  • 1A Continuous Output Current for VIN ≥ 3V, VOUT = 3.3V
  • ±1% Output Voltage Accuracy
  • Low Noise Buck-Boost Architecture
  • Up to 95% Efficiency
  • Programmable Frequency from 300kHz to 2MHz
  • Synchronizable Oscillator
  • Burst Mode® Operation: 32μA IQ
  • Internal 1ms Soft-Start
  • Output Disconnect in Shutdown
  • Shutdown Current: 1μA
  • Short-Circuit Protection
  • Small Thermally Enhanced 12-Pin MSOP and 10-Pin (3mm × 3mm) DFN Packages

The LTC3536 is an extended VIN range, fixed frequency, synchronous buck-boost DC/DC converter that operates from input voltages above, below or equal to the regulated output voltage. The topology incorporated in the LTC3536 provides low noise operation, making it ideal for RF and precision measurement applications.

The device can produce up to 1A of continuous output current, and it includes two N-channel and two P-channel MOSFET switches. Switching frequencies up to 2MHz can be programmed with an external resistor and the oscillator can be synchronized to an external clock. Quiescent current is only 32μA in Burst Mode operation, maximizing battery life in portable applications. Burst Mode operation is user controlled and improves efficiency at light loads.

Other features include a 1μA shutdown current, internal soft-start, overtemperature protection and current limit. The LTC3536 is available in 12-pin thermally enhanced MSOP and 10-pin (3mm × 3mm) DFN packages.

Applications

  • Wireless Inventory Terminals
  • Handheld Medical Instruments
  • Wireless Locators, Microphones
  • Supercapacitor Backup Power Supply
LTC3536
1A Low Noise, Buck-Boost DC/DC Converter
Efficiency vs Input Voltage Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Oscillators 1
LTC6908
Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation
Protection Switches & Controllers 1
LTC4417
RECOMMENDED FOR NEW DESIGNS Prioritized PowerPath™ Controller
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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LTC3536
LTspice

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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
schematic 6
DC1852A

LTC3536EMSE (MSOP) Demo Board | 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.3V @ 1A

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Product Details

Demonstration circuit 1852A is a combined step-up and step-down DC/DC converter, using the LTC3536 monolithic synchronous buck-boost regulator in the MSOP package. The DC1852A has wide input voltage range of 1.8V to 5.5V and is capable of delivering up to 1A of output current. The output voltage of the DC1852A can be set as low as 1.8V and can go as high as 5.5V. DC1852A supports two operation modes: fixed-frequency pulse-width modulation (PWM) and Burst Mode® operation.


 


eval board
schematic 7
DC1797A

LTC3536EDD (DFN) Demo Board | 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.3V @ 1A

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Product Details

Demonstration circuit 1797A is a combined step-up and step-down DC/DC converter using the LTC3536 monolithic synchronous buck-boost regulator in the 3x3 DFN package. The DC1797A has wide input voltage range of 1.8V to 5.5V, and is capable of delivering up to 1A of output current. The output voltage of the DC1797A can be set as low as 1.8V and can go as high as 5.5V. The DC1797A supports two operational modes: fixed-frequency pulse-width modulation (PWM) and Burst Mode® operation.
DC1852A
LTC3536EMSE (MSOP) Demo Board | 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.3V @ 1A
DC1852A-LTC3536EMSE Demo Board DC1852A-LTC3536EMSE Demo Board DC1852A-LTC3536EMSE Demo Board DC1852A-LTC3536EMSE Demo Board DC1852A-LTC3536EMSE Demo Board DC1852A - Schematic
DC1797A
LTC3536EDD (DFN) Demo Board | 1.8V ≤ VIN ≤ 5.5V, VOUT = 3.3V @ 1A
DC1797A - Schematic

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