LT3048 Series - Low Noise Bias Generator in 2mm × 2mm DFN

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 Application

LT3048 Typical Application
LT3048 Typical Application

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 than 500μVP-P output ripple and noise.

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

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LT3048EDC-12#PBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-12#TRMPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-12#TRPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-15#PBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-15#TRMPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-15#TRPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-3.3#PBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-3.3#TRMPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-3.3#TRPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-5#PBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-5#TRMPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC-5#TRPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC#PBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC#TRMPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048EDC#TRPBF 2x2 DFN-8 DC8 E 05-08-1939 Yes
LT3048IDC-12#PBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-12#TRMPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-12#TRPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-15#PBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-15#TRMPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-15#TRPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-3.3#PBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-3.3#TRMPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-3.3#TRPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-5#PBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-5#TRMPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC-5#TRPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC#PBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC#TRMPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes
LT3048IDC#TRPBF 2x2 DFN-8 DC8 I 05-08-1939 Yes


LT3048 Package Drawing
LT3048 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3048EDC-12#PBF 2x2 DFN-8 E $2.36 Yes
LT3048EDC-12#TRMPBF 2x2 DFN-8 E $2.36 $1.70 Yes
LT3048EDC-12#TRPBF 2x2 DFN-8 E $2.36 $1.65 Yes
LT3048EDC-15#PBF 2x2 DFN-8 E $2.36 Yes
LT3048EDC-15#TRMPBF 2x2 DFN-8 E $2.36 $1.70 Yes
LT3048EDC-15#TRPBF 2x2 DFN-8 E $2.36 $1.65 Yes
LT3048EDC-3.3#PBF 2x2 DFN-8 E $2.36 Yes
LT3048EDC-3.3#TRMPBF 2x2 DFN-8 E $2.36 $1.70 Yes
LT3048EDC-3.3#TRPBF 2x2 DFN-8 E $2.36 $1.65 Yes
LT3048EDC-5#PBF 2x2 DFN-8 E $2.36 Yes
LT3048EDC-5#TRMPBF 2x2 DFN-8 E $2.36 $1.70 Yes
LT3048EDC-5#TRPBF 2x2 DFN-8 E $2.36 $1.65 Yes
LT3048EDC#PBF 2x2 DFN-8 E $2.36 Yes
LT3048EDC#TRMPBF 2x2 DFN-8 E $2.36 $1.70 Yes
LT3048EDC#TRPBF 2x2 DFN-8 E $2.36 $1.65 Yes
LT3048IDC-12#PBF 2x2 DFN-8 I $2.59 Yes
LT3048IDC-12#TRMPBF 2x2 DFN-8 I $2.59 $1.87 Yes
LT3048IDC-12#TRPBF 2x2 DFN-8 I $2.59 $1.82 Yes
LT3048IDC-15#PBF 2x2 DFN-8 I $2.59 Yes
LT3048IDC-15#TRMPBF 2x2 DFN-8 I $2.59 $1.87 Yes
LT3048IDC-15#TRPBF 2x2 DFN-8 I $2.59 $1.82 Yes
LT3048IDC-3.3#PBF 2x2 DFN-8 I $2.59 Yes
LT3048IDC-3.3#TRMPBF 2x2 DFN-8 I $2.59 $1.87 Yes
LT3048IDC-3.3#TRPBF 2x2 DFN-8 I $2.59 $1.82 Yes
LT3048IDC-5#PBF 2x2 DFN-8 I $2.59 Yes
LT3048IDC-5#TRMPBF 2x2 DFN-8 I $2.59 $1.87 Yes
LT3048IDC-5#TRPBF 2x2 DFN-8 I $2.59 $1.82 Yes
LT3048IDC#PBF 2x2 DFN-8 I $2.59 Yes
LT3048IDC#TRMPBF 2x2 DFN-8 I $2.59 $1.87 Yes
LT3048IDC#TRPBF 2x2 DFN-8 I $2.59 $1.82 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2120A LT3048-15 Demo Board | Boost with Integrated Schottky and Post-Regulator LDO, 2.7V ≤ VIN ≤ 4.8V, 15Vout @ up to 35mA Contact Factory
DC2258A LT3048 Demo Board | Boost, Integrated Schottky and Post-Regulator LDO, 2.7V ≤ VIN ≤ 4.8V, Vout = 20V @ up to 25mA Contact Factory
Buy Now
Click here to view our complete list of demo boards

Applications

  • Sensor Bias
  • Op Amp Supply

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LT3048
LT3048-12
LT3048-15
LT3048-3.3
LT3048-5

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