LTC3822
Info: : PRODUCTION
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LTC3822

No RSENSE, Low Input Voltage, Synchronous Step-Down DC/DC Controller

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.89
Features
  • No Current Sense Resistor Required
  • All N-Channel MOSFET Synchronous Drive
  • High Current Outputs Possible
  • Constant Frequency Current Mode Operation for Excellent Line and Load Transient Response
  • VIN: 2.75V to 4.5V
  • ±1% 0.6V Reference
  • Low Dropout Operation: 99% Duty Cycle
  • Selectable Frequency (300kHz/550kHz/750kHz)
  • Internal Soft-Start Circuitry
  • Selectable Maximum Peak Current Sense Threshold
  • Digital RUN Control Pin
  • Output Overvoltage Protection
  • Micropower Shutdown: IQ = 7.5µA
  • Tiny Thermally Enhanced Leadless (3mm × 3mm) DFN or 10-Lead MSOP Package
Additional Details
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The LTC3822 is a synchronous step-down switching regulator controller 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.

A maximum duty cycle of 99% provides low dropout operation. The switching frequency can be programmed up to 750kHz, allowing the use of small surface mount inductors and capacitors.

The LTC3822 is available in thermally enhanced DFN and 10-lead MSOP packages.

Features
LTC3822 Internal soft-start, 340μA in sleep mode
LTC3822-1 External soft start, selectable pulse skip/Burst Mode operation, tracking, phase lockable, power good (SSOP-16 package only), 105μA in sleep mode

Applications

  • 3.3VIN Systems
  • Li-Ion Battery Systems

Part Models 4
1ku List Price Starting From $1.89

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3822EDD#PBF
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LTC3822EDD#TRPBF
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LTC3822EMSE#PBF
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LTC3822EMSE#TRPBF
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Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3822EMSE#PBF

PRODUCTION

LTC3822EMSE#TRPBF

PRODUCTION

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Feb 4, 2020

- 20_0130

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Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LTC3822EMSE#PBF

PRODUCTION

LTC3822EMSE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC972A

LTC3822EDD Demo Board (DFN) | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 8A

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DC972A

LTC3822EDD Demo Board (DFN) | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 8A

LTC3822EDD Demo Board (DFN) | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 8A

Product Detail

Demonstration circuit 972A is a high efficiency synchronous step-down DC/DC converter featuring the LTC3822EDD controller and dual N-Channel MOSFETs. The demo board is capable of providing 1.8V/8A from a 2.75V to 4.5V input.

reference details image

DC1014A

LTC3822EMSE (MSOP) Demo Board | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 10A

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DC1014A

LTC3822EMSE (MSOP) Demo Board | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 10A

LTC3822EMSE (MSOP) Demo Board | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 10A

Product Detail

Demonstration circuit 1014A is a high efficiency synchronous step-down DC/DC converter featuring the LTC3822EMSE controller in the exposed pad MSOP package. The demo board is capable of providing 1.8V/10A from a 2.75V to 4.5V input.

Tools & Simulations

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.

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