LTC3025 - 300mA Micropower VLDO Linear Regulator

Features

  • Click Here For LTC3025 Evaluation Kits
  • Wide Input Voltage Range: 0.9V to 5.5V
  • Stable with Ceramic Capacitors
  • Very Low Dropout: 45mV at 300mA
  • Adjustable Output Range: 0.4V to 3.6V
  • ±2% Voltage Accuracy over Temperature Supply Load
  • Low Noise: 80μVRMS (10Hz to 100kHz)
  • BIAS Voltage Range: 2.5V to 5.5V
  • Fast Transient Recovery
  • Shutdown Disconnects Load from VIN and VBIAS
  • Low Operating Current: IIN = 4μA, IBIAS = 50μA Typ
  • Low Shutdown Current: IIN = 1μA, IBIAS = 0.01μA Typ
  • Output Current Limit
  • Thermal Overload Protection
  • Available in 6-Lead (2mm × 2mm) DFN Package

Typical Application

LTC3025
LTC3025
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Description

The LTC3025 is a micropower, VLDO (very low dropout) linear regulator which operates from input voltages as low as 0.9V. The device is capable of supplying 300mA of output current with a typical dropout voltage of only 45mV. A BIAS supply is required to run the internal reference and LDO circuitry while output current comes directly from the IN supply for high efficiency regulation. The low 0.4V internal reference voltage allows the LTC3025 output to be programmed to much lower voltages than available in common LDOs (range of 0.4V to 3.6V). The output voltage is programmed via two ultrasmall SMD resistors.

The LTC3025’s low quiescent current makes it an ideal choice for use in battery-powered systems. For 3-cell NiMH and single cell Li-Ion applications, the BIAS voltage can be supplied directly from the battery while the input can come from a high efficiency buck regulator, providing a high efficiency, low noise output.

Other features include high output voltage accuracy, excellent transient response, stability with ultralow ESR ceramic capacitors as small as 1µF, short-circuit and thermal overload protection and output current limiting. The LTC3025 is available in a tiny, low profile (0.75mm) 6-lead DFN (2mm × 2mm) package.

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Packaging

DFN-6

LTC3025
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3025EDC DFN 6 E $1.77 $1.18 View
LTC3025EDC#PBF DFN 6 E $1.77   View
LTC3025EDC#TR DFN 6 E $1.77 $1.24 View
LTC3025EDC#TRM DFN 6 E $1.77 $1.28 View
LTC3025EDC#TRMPBF DFN 6 E $1.77 $1.28 View
LTC3025EDC#TRPBF DFN 6 E $1.77 $1.24 View
LTC3025EDC-1 DFN 6 E $1.97   View
LTC3025EDC-1#PBF DFN 6 E $1.97   View
LTC3025EDC-1#TR DFN 6 E $1.97 $1.38 View
LTC3025EDC-1#TRM DFN 6 E $1.97 $1.43 View
LTC3025EDC-1#TRMPBF DFN 6 E $1.97 $1.43 View
LTC3025EDC-1#TRPBF DFN 6 E $1.97 $1.38 View
LTC3025EDC-2 DFN 6 E $1.97   View
LTC3025EDC-2#PBF DFN 6 E $1.97   View
LTC3025EDC-2#TR DFN 6 E $1.97 $1.38 View
LTC3025EDC-2#TRM DFN 6 E $1.97 $1.43 View
LTC3025EDC-2#TRMPBF DFN 6 E $1.97 $1.43 View
LTC3025EDC-2#TRPBF DFN 6 E $1.97 $1.38 View
LTC3025EDC-3#PBF DFN 6 E $1.97   View
LTC3025EDC-3#TRMPBF DFN 6 E $1.97 $1.43 View
LTC3025EDC-3#TRPBF DFN 6 E $1.97 $1.38 View
LTC3025EDC-4#PBF DFN 6 E $1.97   View
LTC3025EDC-4#TRMPBF DFN 6 E $1.97 $1.43 View
LTC3025EDC-4#TRPBF DFN 6 E $1.97 $1.38 View
LTC3025IDC#PBF DFN 6 I $1.94   View
LTC3025IDC#TRMPBF DFN 6 I $1.94 $1.41 View
LTC3025IDC#TRPBF DFN 6 I $1.94 $1.36 View
LTC3025IDC-1#PBF DFN 6 I $2.17   View
LTC3025IDC-1#TRMPBF DFN 6 I $2.17 $1.57 View
LTC3025IDC-1#TRPBF DFN 6 I $2.17 $1.52 View
LTC3025IDC-2#PBF DFN 6 I $2.17   View
LTC3025IDC-2#TRMPBF DFN 6 I $2.17 $1.57 View
LTC3025IDC-2#TRPBF DFN 6 I $2.17 $1.52 View
LTC3025IDC-3#PBF DFN 6 I $2.17   View
LTC3025IDC-3#TRMPBF DFN 6 I $2.17 $1.57 View
LTC3025IDC-3#TRPBF DFN 6 I $2.17 $1.52 View
LTC3025IDC-4#PBF DFN 6 I $2.17   View
LTC3025IDC-4#TRMPBF DFN 6 I $2.17 $1.57 View
LTC3025IDC-4#TRPBF DFN 6 I $2.17 $1.52 View
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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.

Evaluation Kits

Part Number Description Price
DC741A LTC3025EDC | VLDO Linear Regulator, 0.9 to 5.5Vin, Jumper Selectable 0.8,1.2, 1.5,1.8 Vout @ 300mA $75.00
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Applications

  • Low Power Handheld Devices
  • Low Voltage Logic Supplies
  • DSP Power Supplies
  • Cellular Phones
  • Portable Electronic Equipment
  • Handheld Medical Instruments
  • Post Regulator for Switching Supply Noise Rejection
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Simulate

To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

For other simulation tools, visit our Design Simulation and Device Models page.

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