LTC3822

PRODUCTION

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

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $1.89
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Part Details

  • 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
LTC3822
No RSENSE™, Low Input Voltage, Synchronous Step-Down DC/DC Controller
1.8V/8A High Efficiency, 550kHz Step-Down Converter Efficiency and Power Loss vs Load Current 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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Hardware Ecosystem

Parts Product Life Cycle Description
Digital Power System Managers 1
LTC2974
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Multiple Output Buck Regulators 1
LTC3880
RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3822
  • LTC3822-1
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
DC972A

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

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Product Details

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.

eval board
schematic 2
DC1014A

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

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Product Details

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.
DC972A
LTC3822EDD Demo Board (DFN) | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 8A
DC972A - Schematic
DC1014A
LTC3822EMSE (MSOP) Demo Board | 2.75V ≤ VIN ≤ 4.5V, VOUT = 1.8V @ 10A
DC1014A - Schematic

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