LT3046

RECOMMENDED FOR NEW DESIGNS

20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator

Part Models
2
1ku List Price
Starting From $2.92
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Part Details

  • Ultra-Low RMS Noise: 0.8μVRMS (10Hz to 100kHz) 
  • Ultra-Low Noise: 2.2nV/√Hz at 10kHz 
  • Ultra-Low 1/f Noise: 2.5μVP-P (0.1Hz to 10Hz) 
  • Ultra-High PSRR: 82dB at 1MHz 
  • Output Current: 200mA 
  • Wide Input-Voltage Range: 2.2V to 20V 
  • Single Capacitor Improves Noise and PSRR 
  • SET Pin Current: 100μA, ±0.5% Initial Accuracy
  • Single Resistor Programs Output Voltage
  • Programmable Current Limit
  • Low Dropout Voltage: 300mV
  •  Output-Voltage Range: 0.2V to 19V
  •  Programmable Power Good
  • Fast Start-Up Capability
  • Precision Enable/UVLO
  • Parallelable for Lower Noise and Higher Current
  • Internal Current Limit with Foldback 
  • Minimum Output Capacitor: 4.7μF Ceramic
  • Compact, Low-Profile, 12-Lead, 3mm × 3mm, DFN Package
LT3046
20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator
LT3046 Typical Application LT3046 Pin Configuration
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Documentation

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Tools & Simulations

LTspice


Models for the following parts are available in LTspice:

  • LT3046
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
LT3046EVK

Evaluation Kit for the LT3046 20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator

Features and Benefits

  • Input Voltage Range: 3.8V to 20V
  • Resistor-Programmed 3.32V Output Voltage
  • Maximum Output Current: 200mA
  • BNC Connectors for Noise and PSRR Measurement
  • Resistor Programmed Power-Good
  • Resistor-Programmable Current Limit, Current Monitoring, and UVLO
  • Thermally Enhanced, 12-Lead, 3mm x 3mm, DFN Package or an 11-ball, 1.621mm × 1.680mm, WLCSP Package

Product Details

The LT3046 evaluation kits (EV kits) feature the LT3046, a 20V, 200mA ultra-low noise and ultra-high power-supply rejection ratio (PSRR) low-dropout (LDO) linear regulator.

See the Ordering Information section for the two types of EV kits available to evaluate the LT3046. There is an EV kit that features a 12-lead, 3mm × 3mm, plastic dual-flat no-leads (DFN) package with an e×posed pad on the bottom side of the IC, and there is also an EV kit that features an 11-ball, 1.621mm × 1.680mm, WLCSP Package. Proper board layout is essential for ma×imum thermal performance.

The LT3046 EV boards operate over an input voltage range of 3.8V to 20V. The LT3046 delivers a maximum output current of 200mA. In addition to featuring ultra-low noise and ultra-high PSRR, the regulator offers programmable power-good functionality a programmable current limit. Current monitoring is also chieved by sensing the ILIM pin voltage.

Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback and thermal limit with hysteresis.

For full details on the LT3046, refer to the LT3046 data sheet, which must be consulted with this user guide when using the LT3046 EV kits.

Design files are available on the LT3046 EV kit page.

LT3046EVK
Evaluation Kit for the LT3046 20V, 200mA, Ultra-Low Noise, Ultra-High PSRR, Linear Regulator
LT3046EVK Board Photo Top LT3046EVKIT Board Photo Angle LT3046EVKIT Board Photo Bottom

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