LTC3836
Info: : PRODUCTION
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LTC3836

Dual 2-Phase, No RSENSE Low VIN Synchronous Controller

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Models 4
1ku List Price Starting From $3.30
Features
  • No Current Sense Resistors Required
  • Out-of-Phase Controllers Reduce Required Input Capacitance
  • All N-Channel Synchronous Drive
  • VIN Range: 2.75V to 4.5V
  • Constant-Frequency Current Mode Operation
  • 0.6V ±1.5% Voltage Reference
  • Low Dropout Operation: 97% Duty Cycle
  • True PLL for Frequency Locking or Adjustment
  • Selectable Pulse-Skipping/Continuous Operation
  • Tracking Function
  • Internal Soft-Start Circuitry
  • Power Good Output Voltage Monitor
  • Output Overvoltage Protection
  • Micropower Shutdown: IQ = 6.5µA
  • Tiny Low Profile (4mm × 5mm) QFN and Narrow SSOP Packages
Additional Details
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The LTC3836 is a 2-phase dual output synchronous step-down switching regulator controller with tracking that drives external N-channel power MOSFETs using few external components. The constant-frequency current mode architecture with MOSFET VDS sensing eliminates the need for sense resistors and improves efficiency. The power loss and noise due to the ESR of the input capacitance are minimized by operating the two controllers out-of-phase. Pulse-skipping operation provides high efficiency at light loads. The 97% duty cycle capability provides low dropout operation, extending operating time in battery-powered systems.

The operating frequency is selectable from 300kHz to 750kHz, allowing the use of small surface mount inductors and capacitors. For noise sensitive applications, the LTC3836 operating frequency can be externally synchronized from 250kHz to 850kHz.

The LTC3836 features an internal 1ms soft-start that can be extended with an external capacitor. A tracking input allows the second output to track the first during start-up.

The LTC3836 is available in the tiny thermally enhanced (4mm × 5mm) QFN and 28-lead narrow SSOP packages.

Applications

  • General Purpose 3.3V to 1.X Supplies
  • Single Lithium-Ion Powered Devices
  • Distributed DC Power Systems
Part Models 4
1ku List Price Starting From $3.30

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Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3836EGN#PBF
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LTC3836EGN#TRPBF
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LTC3836EUFD#PBF
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LTC3836EUFD#TRPBF
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Product Lifecycle

PCN

Aug 10, 2022

- 22_0177

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC3836EGN#PBF

PRODUCTION

LTC3836EGN#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Aug 10, 2022

- 22_0177

arrow down

Laser Top Mark Conversion for QSOP20_24_28 Assembled in ADPG [PNG] and UTL

LTC3836EGN#PBF

PRODUCTION

LTC3836EGN#TRPBF

PRODUCTION

Jan 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

Software & Part Ecosystem

Evaluation Kits 2

reference details image

DC1107A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 7A, VOUT2 = 1.2V @ 7A

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DC1107A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 7A, VOUT2 = 1.2V @ 7A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 7A, VOUT2 = 1.2V @ 7A

Product Detail

Demonstration circuit 1107 is a 2-phase dual high efficiency synchronous step-down DC/DC converter that features the LTC3836EUFD controller. It operates with a 2.75V to 4.5V input range. and has two outputs: 1.8V @ 7A and 1.2V @ 7A.


 


reference details image

DC1081A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 12A, VOUT2 = 1.2V @ 12A

zoom

DC1081A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 12A, VOUT2 = 1.2V @ 12A

LTC3836EUFD Demo Board | 2-Phase, 2.75V to 4.5V Input, VOUT1 = 1.8V @ 12A, VOUT2 = 1.2V @ 12A

Product Detail

Demonstration circuit DC1081 is a dual-output low VIN step-down power supply featuring the LTC3836, a low quiescent current, 2-phase synchronous buck controller. The input voltage is from 2.75V to 4.5V. The demo board has two outputs: 1.8V/12A and 1.2V/12A.

Tools & Simulations 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.

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