LT1763

RECOMMENDED FOR NEW DESIGNS

500mA, Low Noise, LDO Micropower Regulators

Data Sheet Product Selection Table
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Overview

  • Low Noise: 20μVRMS (10Hz to 100kHz)
  • Output Current: 500mA
  • Low Quiescent Current: 30μA
  • Wide Input Voltage Range: 1.8V to 20V
  • Low Dropout Voltage: 300mV
  • Very Low Shutdown Current: < 1μA
  • No Protection Diodes Needed
  • Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3V, 3.3V, 5V
  • Adjustable Output from 1.22V to 20V
  • Stable with 3.3μF Output Capacitor
  • Stable with Aluminum, Tantalum or Ceramic Capacitors
  • Reverse Battery Protection
  • No Reverse Current
  • Overcurrent and Overtemperature Protected
  • 8-Lead SO and 12-Lead (4mm × 3mm) DFN Packages

The LT1763 series are micropower, low noise, low dropout regulators. The devices are capable of supplying 500mA of output current with a dropout voltage of 300mV. Designed for use in battery-powered systems, the low 30μA quiescent current makes them an ideal choice. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators.

A key feature of the LT1763 regulators is low output noise. With the addition of an external 0.01μF bypass capacitor, output noise drops to 20μVRMS over a 10Hz to 100kHz bandwidth. The LT1763 regulators are stable with output capacitors as low as 3.3μF. Small ceramic capacitors can be used without the series resistance required by other regulators.

Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The parts come in fixed output voltages of 1.5V, 1.8V, 2.5V, 3V, 3.3V and 5V, and as an adjustable device with a 1.22V reference voltage. The LT1763 regulators are available in 8-lead SO and 12-lead, low profile (4mm × 3mm × 0.75mm) DFN packages.

Applications

  • Cellular Phones
  • Battery-Powered Systems
  • Noise-Sensitive Instrumentation Systems
LT1763
500mA, Low Noise, LDO Micropower Regulators
3.3V Low Noise Regulator Dropout Voltage Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Application Note 2

Technical Articles 5

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
LDO Linear Regulators 2
LT3055 Series
500mA, Linear Regulator with Precision Current Limit and Diagnostics
LT3085
RECOMMENDED FOR NEW DESIGNS Adjustable 500mA Single Resistor Low Dropout Regulator
Protection Switches & Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT1763
  • LT1763-1.5
  • LT1763-1.8
  • LT1763-2.5
  • LT1763-3
  • LT1763-3.3
  • LT1763-5
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
DC368B

LT1763 | 500mA Low Noise Micropower LDO Regulator

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Product Details

Demonstration circuit DC368B is a low noise micropower voltage regulator using the LT1763 in the 8-lead SO package. These circuits are used primarily in voltage controlled oscillators, RF power supplies and, in larger systems, as local regulators. The ability to tolerate a wide variety of output capacitors makes them ideal in space- and cost-sensitive systems.

eval board
schematic 4
schematic 5
schematic 6
PMD-ARD-INTZ

Four PMOD to Arduino Interposer with Bidirectional voltage translation

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Features and Benefits

  • 4-PMOD Connector communication
    • (2) SPI
    • (1) I2C
    • (1) SPI/UART (jumper configurable)
  • Full bidirectional voltage translation between each PMOD port and the controller board
  • Independent IOREF voltage for each PMOD port
  • Use of external voltage allows max power to be delivered to each PMOD port
  • On-board I2C pull-up resistors for high load devices. (not installed by default)

Product Details

PMD-ARD-INTZ allows four PMOD boards to be interfaced to an Arduino or a similar board (EVAL-ADICUP3029, EVAL-ADICUP360). It has bidirectional voltage translation (3.3V & 5V) between each pmod port and the controller board. It can be used in on many development platforms and prototype designs. It enables a faster development by enabling off the shelf compatible pmod boards to interface with Arduino or similar MCU boards with Arduino form factor.

eval board
schematic 7
schematic 8
schematic 9
schematic 10
schematic 11
DC368A

OBSOLETE: LT1763CS8 Demo Board | Low Noise LDO Regulator, 2.3V ≤ VIN ≤ 20V, VOUT = 1.22V/1.5V/1.8V/2.5V/3.3V/5V @ 500mA

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Product Details

This evaluation board is obsolete and no longer recommended. The replacement board is the DC368B.

Demonstration circuit DC368A is a low noise micropower voltage regulator using the 500mA LT1763 in the 8-lead SO package. These circuits are used primarily in voltage controlled oscillators, RF power supplies and, in larger systems, as local regulators. The DC368 has an input voltage range of 2.3V to 20V and provides a jumper-selectable 1.2V/1.5V/1.8V/2.5V/3.0V/3.3V/5.0V output at 500mA.
DC368B
LT1763 | 500mA Low Noise Micropower LDO Regulator
DC368B Evaluation Board DC368B Evaluation Board - Top View DC368B Evaluation Board - Bottom View
PMD-ARD-INTZ
Four PMOD to Arduino Interposer with Bidirectional voltage translation
PMD-ARD-INTZ Evaluation Board PMD-ARD-INTZ Evaluation Board - Top View PMD-ARD-INTZ Evaluation Board - Bottom View
DC368A
OBSOLETE: LT1763CS8 Demo Board | Low Noise LDO Regulator, 2.3V ≤ VIN ≤ 20V, VOUT = 1.22V/1.5V/1.8V/2.5V/3.3V/5V @ 500mA
DC368A Demo Board DC368A Demo Board DC368A Demo Board DC368A Demo Board DC368A - Schematic

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