LTC3025
LTC3025
PRODUCTION300mA Micropower VLDO Linear Regulator
- Part Models
- 4
- 1ku List Price
- Starting From $2.11
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Overview
- 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
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.
| Output Current | Output Voltage | |
| LTC3025 | 300mA | Adj (0.4V to 3.6V) |
| LTC3025-1 | 500mA | Adj (0.4V to 3.6V) |
| LTC3025-2 | 500mA | 1.2V Fixed |
| LTC3025-3 | 500mA | 1.5V Fixed |
| LTC3025-4 | 500mA | 1.8V Fixed |
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
Documentation
Data Sheet 1
User Guide 1
Application Note 1
Technical Articles 1
Press Release 1
Brochure 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3025EDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3025EDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3025IDC#TRMPBF | 6-Lead DFN (2mm x 2mm w/ EP) | ||
| LTC3025IDC#TRPBF | 6-Lead DFN (2mm x 2mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Power System Management (PSM) & Sequencers 1 | ||
| LTC2974 | RECOMMENDED FOR NEW DESIGNS | 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement |
| Supervisory Circuits & Reset ICs 1 | ||
| LTC2935 | PRODUCTION | Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds |
Tools & Simulations
LTspice 2
- LTC3025/LTC3406-1.5 Demo Circuit - High Efficiency Step-Down Converter with VLDO (2.7-5.5V to 1.5V @ 600mA & 1.2V @ 300mA)
- LTC3035/LTC3025 Demo Circuit - Dual LDO Output (1.7-5.5V to 1.5V/1.8V @ 300mA)
Models for the following parts are available in LTspice:
- LTC3025
- LTC3025-1
- LTC3025-2
- LTC3025-3
- LTC3025-4
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3025EDC Demo Board | Low VIN, VLDO Line ar Regulator, 0.9V ≤ VIN ≤ 5.5V, VOUT = 0.8V/1.2V/1.5V/1.8V/Adj @ 300mA
Resources
Reference Designs
Part Used
Part Used
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