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ADI Power by Linear LT3048-5

Low Noise Bias Generator in 2mm × 2mm DFN

Overview

TopologyBoost Converter
Input voltage2.7-4.8 V
Switching frequency1600-2800 kHz
Output 15 V / 0.03 A
IC revisionA

Description

The LT®3048 series generate low noise, low ripple bias supplies from input voltages of 2.7V to 4.8V.

The LT3048 includes a boost regulator and a LDO linear regulator. The boost regulator provides power to the linear regulator.

The boost regulator output voltage is regulated to 1.1V above the LDO output, optimizing LDO ripple rejection and transient response. Fixed frequency operation and current mode control allow the use of very small inductors and results in low, predictable output ripple.

The linear regulator in the LT3048 generates a programmable output and the LT3048-XX generate fixed output voltages. High power supply ripple rejection combined with a low noise internal reference results in less than500μVP-P output ripple and noise.

The LT3048 is available in a 8-lead 2mm × 2mm DFN package.

Features

  • Generates Low Noise Bias Voltage from Single Cell Li-Ion Battery
  • Output Current: Up to 40mA
  • Low Output Ripple and Noise: <500μVP-P
  • Boost Regulator
  • 1MHz Operation (LT3048)
  • 2.2MHz Operation (LT3048-XX)
  • Integrated Schottky Diode
  • Low Dropout Linear Regulator
  • 1.235V Feedback Voltage (LT3048)
  • Low Noise: <120μVRMS (10Hz to 100kHz)
  • 0.1% Load Regulation
  • Fixed 3.3V, 5V, 12V, 15V and Adjustable Output Options
  • Short-Circuit and Thermal Protection
  • Load Disconnect in Shutdown
  • Available in 2mm × 2mm DFN Package

Typical applications

  • Op Amp Supply
  • Sensor Bias

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples
74437334056
STE ALT EAG CAD LTS PSP SPE IGS CADWE-LHMI SMT Power Inductor 5.6 2.1 5.5 112 122 21 SMT
Order Code Data­sheet
74437334056
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Mount Samples