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Analog Devices Inc. LT3055MPMSE-5#PBF
- Part No.:
- LT3055MPMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT3055MPMSE-5#PBF.pdf
- Description:
- IC REG LINEAR 5V 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,705
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Product details
Overview
LT3055MPMSE-5#PBF from Analog Devices is a 500mA, low-dropout linear regulator with precision current limit (±10%), output current monitor (1/500× IOUT), and dual fault diagnostics (FAULT1/FAULT2). It delivers a fixed 5V output with 350mV dropout at 500mA, ±2% output tolerance over load/line/temperature, and operates from 1.6V to 45V input. It is used in automotive telematics power rails requiring robust open-circuit and overcurrent detection.
For engineers reviewing the LT3055MPMSE-5#PBF datasheet, LT3055MPMSE-5#PBF pinout, LT3055MPMSE-5#PBF application, or LT3055MPMSE-5#PBF equivalent, key selection criteria include its –55°C to 150°C MP-grade operating range, programmable IMIN threshold for open-load detection, TEMP pin (10mV/°C) for die temperature monitoring, and compatibility with low-ESR ceramic capacitors (≥3.3µF).
Technical Context
The LT3055MPMSE-5#PBF integrates a precision current-limit circuit controlled by an external resistor on the IMAX pin and a minimum-output-current comparator referenced to IMIN. Its FAULT1/FAULT2 pins provide independent open-circuit (IMIN < threshold), overcurrent (IOUT > IMAX threshold), and thermal-fault indication via open-collector logic outputs.
It features a dedicated TEMP pin delivering 250mV at 25°C with 10mV/°C slope, and an IMON pin sourcing exactly 1/500th of output current-both enabling real-time system-level health monitoring without external sensing components. Stability is optimized for ceramic output capacitors ≥3.3µF with no ESR requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V, ±2% tolerance over full load, line, and temperature range ensures stable MCU/DSP core supply without trimming. |
| Max Output Current | 500mA continuous, with foldback current limiting protecting against sustained overload or short-circuit conditions. |
| Dropout Voltage | 350mV at 500mA enables operation from 5.35V input-critical for 5V systems powered from marginal battery or intermediate rails. |
| Input Voltage Range | 1.6V to 45V supports wide-input applications including automotive (cold-crank, load-dump) and industrial 24V/48V systems. |
| Output Noise | 25µVRMS (10Hz–100kHz) with 10nF bypass capacitor meets noise-sensitive RF and high-precision analog supply requirements. |
| Operating Temp | –55°C to +150°C (MP grade) qualifies for under-hood automotive, military, and harsh-environment industrial use. |
| Current Monitor Ratio | 1/500 × IOUT (±10%) enables accurate current measurement using standard ADCs without shunt resistors or amplifiers. |
Pinout & Package
LT3055MPMSE-5#PBF is housed in a 16-lead plastic MSOP package (4mm × 3mm) with exposed GND pad (Pin 17) requiring PCB soldering for thermal and electrical integrity. The package supports high-reliability mounting in extended-temperature environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (1,2) | Power Input | Accepts 1.6V–45V input; reverse-battery protected-no external diode needed in automotive battery connections. |
| SHDN (3) | Shutdown Control | Active-low logic input; <1µA shutdown current enables ultra-low-power system sleep modes. |
| FAULT1 (4) | Open-Circuit Fault | Asserts low when output current falls below IMIN-programmed threshold-detects broken loads or disconnected sensors. |
| FAULT2 (5) | Overcurrent/Thermal Fault | Asserts low during current limit or thermal shutdown; both FAULT1/FAULT2 low = thermal event. |
| PWRGD (6) | Power-Good Indicator | Open-collector output active low when VOUT < 90% nominal-enables safe processor reset sequencing. |
| TEMP (7) | Die Temperature Sensor | Analog voltage output (250mV @ 25°C, 10mV/°C) for real-time junction temperature monitoring without external sensor. |
| IMON (8) | Output Current Monitor | Sources 1/500 × IOUT; connects directly to ADC input for precise load-current telemetry. |
| IMIN (9) | Min Current Threshold Set | Resistor-to-GND sets open-load detection threshold (e.g., 120kΩ = 10mA); floating disables function. |
| GND (10–13,17) | Ground Reference | Pins 10–13 and exposed pad (17) are all internal GND-must be tied together on PCB for low-impedance return path. |
| REF/BYP (14) | Bypass & Reference | Connect 10nF capacitor to reduce output noise to 25µVRMS; also serves as internal bandgap reference node. |
| IMAX (15) | Current Limit Set | Resistor-to-GND programs precision current limit (e.g., 604Ω = 497mA ±10%); ties to GND for internal short-circuit protection. |
| OUT (16) | Regulated Output | 5V regulated output capable of 500mA; requires ≥3.3µF low-ESR ceramic capacitor for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Precision Current Limit | Set via single resistor on IMAX pin with ±10% accuracy across –55°C to +150°C-enables repeatable overcurrent protection without calibration. |
| Open-Circuit Detection | Configurable IMIN threshold (e.g., 10mA or 1mA) detects failed loads or wiring faults before system failure occurs. |
| Integrated Die Temperature Monitoring | TEMP pin provides calibrated 10mV/°C analog output-eliminates need for external thermal sensors in space-constrained designs. |
| Ultra-Low-Noise Regulation | 25µVRMS noise (10Hz–100kHz) with 10nF REF/BYP capacitor supports clean power for RF transceivers and high-resolution ADCs. |
| Reverse Battery Protection | Withstands –45V on IN pin with zero reverse current flow-protects downstream circuitry during battery misconnection. |
Applications
| Protected Antenna Supplies | Automotive Telematics |
|---|---|
Use Scenario: Powering GPS/GNSS and cellular antenna modules in vehicle infotainment systems where voltage stability and fault visibility are critical. IC Role / Device Role / Timing Role: Primary 5V LDO supplying RF front-end ICs while monitoring antenna cable integrity via IMIN open-circuit detection. Use Value: Prevents undetected antenna disconnection from causing false GNSS lock loss or cellular handover failures-improves system reliability. | Use Scenario: Providing regulated 5V power to telematics control units (TCUs) operating under automotive cold-crank (4.5V) and load-dump (40V+) conditions. IC Role / Device Role / Timing Role: High-voltage-tolerant LDO with integrated TEMP and FAULT diagnostics for functional safety compliance (ISO 26262 ASIL-B support). Use Value: Enables real-time thermal derating and open-wire detection-reducing need for redundant external monitoring circuits. |
| Industrial Truck Electronics | Noise-Sensitive RF Supplies |
Use Scenario: Powering CAN transceiver and microcontroller subsystems in forklift and off-highway vehicle ECUs exposed to wide ambient temperatures (–40°C to +85°C). IC Role / Device Role / Timing Role: MP-grade LDO delivering 5V with guaranteed operation up to +150°C junction temperature and diagnostic feedback for predictive maintenance. Use Value: Eliminates thermal shutdown-induced communication blackouts during prolonged high-ambient operation. | Use Scenario: Supplying low-noise 5V to RF synthesizers, mixers, and ADC clock buffers in test equipment and base station radios. IC Role / Device Role / Timing Role: Ultra-low-noise LDO with 10nF bypass capacitor achieving 25µVRMS noise-directly improving phase noise and ENOB performance. Use Value: Avoids external ferrite-bead filters and discrete regulators, reducing BOM count and board area while meeting spectral purity specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3026EMS-5#PBF | Fixed 5V, 500mA, but lacks IMIN/IMON/TEMP diagnostics and has higher 45µVRMS noise. | No open-circuit or current-monitoring capability-requires external circuitry for fault detection. | Select when diagnostics are unnecessary and cost is primary; not suitable for ASIL-B or predictive maintenance use cases. |
| TPS7A4701RGWR | Adjustable 1.4V–20.5V, 1A, ultra-low noise (4.7µVRMS), but no current limit programming or FAULT pins. | Requires external current-sense amplifier and comparator for overcurrent/open-circuit detection. | Choose for ultra-low-noise analog supplies where programmability and diagnostics are secondary to noise performance. |
Compared with LTC3026EMS-5#PBF and TPS7A4701RGWR, the LT3055MPMSE-5#PBF uniquely integrates precision current limit, open-circuit detection, and die temperature monitoring in a single 5V LDO-reducing system-level component count and enabling autonomous fault response without firmware intervention.
Availability
LT3055MPMSE-5#PBF is available at Aetrix Electronics and suitable for automotive telematics, industrial truck electronics, and noise-sensitive RF supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3055MPMSE-5#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT3055 series was designed as a robust, diagnostic-capable LDO family for mission-critical power rails where reliability, fault visibility, and wide-input operation are mandatory-especially in automotive and industrial edge nodes.
FAQ
What is the maximum input voltage rating for the LT3055MPMSE-5#PBF?
The LT3055MPMSE-5#PBF supports an absolute maximum input voltage of ±50V on the IN pin, with a recommended operating range of 1.6V to 45V. This high input tolerance enables direct connection to unregulated automotive batteries and industrial 24V/48V rails without pre-regulation.
How does the LT3055MPMSE-5#PBF implement open-circuit detection?
The LT3055MPMSE-5#PBF uses the IMIN pin to detect open-circuit conditions: an external resistor between IMIN and GND sets a minimum output current threshold (e.g., 120kΩ = 10mA). If load current falls below this value, FAULT1 asserts low-enabling immediate system-level response without software polling.
What is the purpose of the TEMP pin on the LT3055MPMSE-5#PBF?
The TEMP pin on the LT3055MPMSE-5#PBF outputs a voltage proportional to average die temperature (250mV at 25°C, 10mV/°C). It allows real-time thermal monitoring using a standard ADC, eliminating external temperature sensors and supporting thermal derating or shutdown decisions in the LT3055MPMSE-5#PBF-based design.
Can the LT3055MPMSE-5#PBF operate with ceramic output capacitors?
Yes, the LT3055MPMSE-5#PBF is optimized for stability with low-ESR ceramic output capacitors as small as 3.3µF. Unlike many older LDOs, it requires no minimum ESR and avoids the size, cost, and reliability drawbacks of tantalum or aluminum electrolytic capacitors.
What is the accuracy of the current monitor function in the LT3055MPMSE-5#PBF?
The LT3055MPMSE-5#PBF current monitor (IMON pin) delivers a current source equal to 1/500th of output current, with a ratio tolerance of ±10% over the full –55°C to +150°C operating range. This enables accurate load-current telemetry using a simple sense resistor and ADC, without calibration.
LT3055MPMSE-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.59V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 130 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 66dB (120Hz)
- Control Features:
- Current Limit, Enable, Power Good, Soft Start
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT3055MPMSE-5#PBF FAQ
1.How can I place an order for LT3055MPMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3055MPMSE-5#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT3055MPMSE-5#PBF reliable?
The price and inventory of LT3055MPMSE-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3055MPMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT3055MPMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3055MPMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3055MPMSE-5#PBF?
LT3055MPMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3055MPMSE-5#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT3055MPMSE-5#PBF?
For technical support, including LT3055MPMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3055MPMSE-5#PBF requirements.
6.How does Aetrix verify that LT3055MPMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT3055MPMSE-5#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT3055MPMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT3055MPMSE-5#PBF?
All LT3055MPMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3055MPMSE-5#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT3055MPMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT3055MPMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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