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
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 |
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
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 | |||
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
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
