LTC3026 - 1.5A Low Input Voltage VLDO Linear Regulator

Features

  • Input Voltage Range:
    1.14V to 3.5V (with Boost Enabled)
    1.14V to 5.5V (with External 5V Boost)
  • Low Dropout Voltage: 100mV at IOUT = 1.5A
  • Adjustable Output Range: 0.4V to 2.6V
  • Output Current: Up to 1.5A
  • Excellent Supply Rejection Even Near Dropout
  • Shutdown Disconnects Load from VIN and VBST
  • Low Operating Current: IIN = 950µA at VIN = 1.5V
  • Low Shutdown Current:
    IIN < 1µA (Typ), IBST = 0.1µA (Typ)
  • Stable with 10µF or Greater Ceramic Capacitors
  • Short-Circuit, Reverse Current Protected
  • Overtemperature Protected
  • Available in 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN Packages

Typical Application

LTC3026 Typical Application
LTC3026 Typical Application

Description

The LTC3026 is a very low dropout (VLDO™) linear regulator that can operate at input voltages down to 1.14V. The device is capable of supplying 1.5A of output current with a typical dropout voltage of only 100mV. To allow operation at low input voltages the LTC3026 includes a boost converter that provides the necessary headroom for the internal LDO circuitry.

Output current comes directly from the input supply to maximize efficiency. The boost converter requires only a small chip inductor and ceramic capacitor for operation. Additionally, the boosted output voltage of one LTC3026 can supply the boost voltage for other LTC3026s, thus requiring a single inductor for multiple LDOs. A user supplied boost voltage can be used eliminating the need for an inductor altogether.

The LTC3026 regulator is stable with 10μF or greater ceramic output capacitors. The device has a low 0.4V reference voltage which is used to program the output voltage via two external resistors. The device also has internal current limit, overtemperature shutdown, and reverse output current protection. The LTC3026 is available in a small 10-lead MSOP or low profile (0.75mm) 10-lead 3mm × 3mm DFN package.

  Features
LTC3026 Integrated boost converter
LTC3026-1 Boost converter internally disabled and requires an external 5V supply to operate

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
LTC3026EDD#PBF 3x3 DFN-10 DD E 05-08-1699 Yes
LTC3026EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 Yes
LTC3026EMSE#PBF MS-10E MSE E 05-08-1664 Yes
LTC3026EMSE#TRPBF MS-10E MSE E 05-08-1664 Yes
LTC3026IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC3026IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LTC3026IMSE#PBF MS-10E MSE I 05-08-1664 Yes
LTC3026IMSE#TRPBF MS-10E MSE I 05-08-1664 Yes


LTC3026 Package Drawing
LTC3026 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
LTC3026EDD#PBF 3x3 DFN-10 E $3.14 $2.20 Yes
LTC3026EDD#TRPBF 3x3 DFN-10 E $2.30 Yes
LTC3026EMSE#PBF MS-10E E $3.14 $2.20 Yes
LTC3026EMSE#TRPBF MS-10E E $2.26 Yes
LTC3026IDD#PBF 3x3 DFN-10 I $3.46 $2.42 Yes
LTC3026IDD#TRPBF 3x3 DFN-10 I $2.48 Yes
LTC3026IMSE#PBF MS-10E I $3.46 $2.42 Yes
LTC3026IMSE#TRPBF MS-10E I $2.48 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
DC833A LTC3026EDD | Low VIN, VLDO Linear Regulator, 1.14V ≤ VIN ≤ 5.5V (3.5V Using Internal Boost), Vout = 0.8V/1.2V/1.5V/1.8V/Adj @ 1.5A $75.00
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Click here to view our complete list of demo boards

Applications

  • High Efficiency Linear Regulator
  • Post Regulator for Switching Supplies
  • Microprocessor Supply

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

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Models for the following parts are available in LTspice:
LTC3026
LTC3026-1

Technical Support