LT3055
LT3055 Series
RECOMMENDED FOR NEW DESIGNS500mA, Linear Regulator with Precision Current Limit and Diagnostics
- Part Models
- 36
- 1ku List Price
- Starting From $3.37
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Overview
- Output Current: 500mA
- Dropout Voltage: 350mV
- Input Voltage Range: 1.6V to 45V
- Programmable Precision Current Limit: ±10%
- Output Current Monitor: 1/500th of IOUT
- Programmable Minimum IOUT Monitor
- Temperature Monitor: 10mV/°C
- FAULT Indicator: Current Limit, Thermal Limit or Minimum IOUT
- Low Noise: 25μVRMS (10Hz to 100kHz)
- Adjustable Output (VREF = VOUT(MIN) = 0.6V)
- Output Tolerance: ±2% Over Load, Line and Temperature
- Stable with Low ESR, Ceramic Output Capacitors (3.3μF Minimum)
- Shutdown Current: <1μA
- Reverse Battery and Thermal Limit Protection
- 16-Lead 4mm × 3mm DFN and MSOP Packages
The LT3055 series are micropower, low noise, low dropout voltage (LDO) linear regulators. The devices supply 500mA of output current with a dropout voltage of 350mV. A 10nF bypass capacitor reduces output noise to 25μVRMS in a 10Hz to 100kHz bandwidth and soft starts the reference. The LT3055’s ±45V input voltage rating combined with its precision current limit and diagnostic functions make the IC an ideal choice for robust, high reliability applications.
A single resistor programs the LT3055’s current limit, accurate to ±10% over a wide input voltage and temperature range. Another resistor programs the LT3055’s minimum output current monitor, useful for detecting open-circuit conditions. The current monitor function sources a current equal to 1/500th of output current. Logic fault pins assert low if the LT3055 is in current limit (FAULT2), operating below its minimum output current (FAULT1) or is in thermal limit (both FAULT1 and FAULT2). PWRGD indicates output regulation. The TEMP pin indicates average die temperature.
The LT3055 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3μF. Internal protection circuitry includes current limiting, thermal limiting, reverse battery protection, reverse current protection and reverse output protection.
The LT3055 is available in fixed output voltages of 3.3V and 5V, and as an adjustable device with an output voltage range from 0.6V to 40V.
Applications
- Protected Antenna Supplies
- Automotive Telematics
- Industrial Applications (Trucks, Forklifts, etc.)
- High Reliability Applications
- Noise-Sensitive RF or DSP Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Brochure 1
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 Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT3055EMSE#PBF | PRODUCTION | |
| LT3055EMSE#TRPBF | PRODUCTION | |
| LT3055EMSE-3.3#PBF | PRODUCTION | |
| LT3055EMSE-3.3#TRPBF | PRODUCTION | |
| LT3055EMSE-5#PBF | PRODUCTION | |
| LT3055EMSE-5#TRPBF | PRODUCTION | |
| LT3055HMSE#PBF | PRODUCTION | |
| LT3055HMSE#TRPBF | PRODUCTION | |
| LT3055HMSE-3.3#PBF | PRODUCTION | |
| LT3055HMSE-3.3#TRPBF | PRODUCTION | |
| LT3055HMSE-5#PBF | PRODUCTION | |
| LT3055HMSE-5#TRPBF | PRODUCTION | |
| LT3055IMSE#PBF | PRODUCTION | |
| LT3055IMSE#TRPBF | PRODUCTION | |
| LT3055IMSE-3.3#PBF | PRODUCTION | |
| LT3055IMSE-3.3#TRPBF | PRODUCTION | |
| LT3055IMSE-5#PBF | PRODUCTION | |
| LT3055IMSE-5#TRPBF | PRODUCTION | |
| LT3055MPMSE#PBF | PRODUCTION | |
| LT3055MPMSE#TRPBF | PRODUCTION | |
| LT3055MPMSE-3.3#PBF | PRODUCTION | |
| LT3055MPMSE-3.3#TRPBF | PRODUCTION | |
| LT3055MPMSE-5#PBF | PRODUCTION | |
| LT3055MPMSE-5#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
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| Hot Swap Controllers 1 | ||
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| LDO Linear Regulators 1 | ||
| LT3065 Series | 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Power Good | |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3055
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
LT3055EDD Demo Board | Micropower Linear Regulator, Precision Current Limit, Diagnostics, ±45V Input Voltages, 2.2V ≤ VIN ≤ 45V, VOUT = 1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 500mA