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Analog Devices Inc. LTC3103EMSE#TRPBF
- Part No.:
- LTC3103EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3103EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 300MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:13,596
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Product details
Overview
LTC3103EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter optimized for ultralow-quiescent-current battery-powered systems. It delivers up to 300mA output current, operates from 2.5V to 15V input, regulates down to 0.6V, and achieves 95% peak efficiency with 1.8µA no-load quiescent current in Burst Mode - enabling multi-year operation in energy-harvesting sensor nodes.
For engineers reviewing the LTC3103EMSE#TRPBF datasheet, LTC3103EMSE#TRPBF pinout, LTC3103EMSE#TRPBF application, or LTC3103EMSE#TRPBF equivalent, key selection criteria include its dual-mode operation (Burst vs forced continuous), integrated power-good flag, thermal shutdown, soft-start, and precise RUN pin threshold - all in a thermally enhanced 10-pin MSOP package.
Technical Context
The LTC3103EMSE#TRPBF employs a current-mode PWM architecture with internal slope compensation to ensure stability across wide duty cycles (up to 92%). Its dual operational modes are controlled via the MODE pin: automatic Burst Mode enables sub-2µA quiescent current at light loads, while forced continuous mode delivers fixed 1.2MHz switching with low-noise constant-frequency operation.
It integrates two N-channel MOSFETs (0.65Ω main switch, 0.85Ω synchronous rectifier), an accurate 0.6V feedback reference (±2% over temperature), programmable RUN comparator (0.80V threshold, 60mV hysteresis), and open-drain PGOOD output with –10% regulation dropout detection and 1ms enable delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 15V - supports single Li-ion, multicell alkaline, or supercapacitor inputs without external pre-regulation. |
| Output Voltage Range | 0.6V to 13.8V - adjustable via external resistor divider; 0.6V reference enables low-voltage microcontroller core rails. |
| Max Output Current | 300mA - sufficient for RF transceivers, sensors, and low-power MCUs; limited by internal 0.5A peak switch current. |
| Quiescent Current (Burst) | 1.8µA typical at no load - extends battery life in intermittently active IoT endpoints. |
| Switching Frequency | 1.2MHz fixed (forced continuous) - enables compact 10µH inductors and reduces EMI filtering burden. |
| Feedback Reference | 0.600V ±2% (–40°C to 125°C) - high-accuracy regulation critical for precision analog or ADC reference supplies. |
| Power Good Threshold | –10% of FB voltage (i.e., 0.54V for 0.6V setpoint) - provides reliable system reset signaling under brownout conditions. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm × 1.1mm), exposed pad (GND), rated for –40°C to 125°C junction temperature (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (1) | Main input supply | Accepts 2.5V–15V; requires ≥10µF ceramic decoupling adjacent to pin for stability and EMI control. |
| SW (2) | Switch node | Connects to inductor; carries high di/dt; must be routed short and wide to minimize ringing and losses. |
| BST (3) | Bootstrap supply | Drives high-side gate via 22nF capacitor to SW; enables efficient N-MOSFET high-side switching. |
| GND (4) | Power ground | Primary return path for power stage; connects to exposed pad for thermal and electrical integrity. |
| PGOOD (5) | Open-drain status output | Pulls low if VOUT drops >10% below regulation, during thermal shutdown, or UVLO - used for system sequencing. |
| VCC (6) | Internal bias rail | Regulated ~3.3V supply derived from VIN; powers control circuitry; requires ≥1µF local decoupling. |
| RUN (7) | Enable comparator input | 0.80V threshold enables precise undervoltage lockout; 60mV hysteresis prevents chatter near trip point. |
| FB (8) | Feedback input | Monitors resistive divider output; error amplifier compares to 0.6V reference to regulate VOUT. |
| NC (9) | No-connect | Must be tied to GND per datasheet; not internally connected - avoids floating node noise coupling. |
| MODE (10) | Operation mode select | ≥1.2V → Burst Mode (ultralow IQ); ≤0.5V → forced continuous (low-noise, fixed frequency). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Burst Mode® | Reduces no-load IQ to 1.8µA while maintaining regulation - essential for energy harvesting and coin-cell applications. |
| Synchronous rectification | Integrated 0.65Ω/0.85Ω N-MOSFETs eliminate external Schottky loss, enabling 95% peak efficiency at 300mA. |
| Programmable RUN threshold | 0.80V ±0.05V comparator with 60mV hysteresis allows precise, stable input UVLO without external components. |
| Integrated soft-start | 1.4ms typical closed-loop ramp prevents inrush current and ensures monotonic VOUT rise - critical for powering FPGAs or PLLs. |
| Thermal overload protection | Shuts down at ~150°C and auto-restarts at ~130°C - protects against sustained overload or poor PCB heatsinking. |
Applications
| Remote Sensor Networks | Distributed Power Systems |
|---|---|
Use Scenario: Wireless environmental sensors powered by solar cells or thermoelectric harvesters with intermittent energy availability. IC Role / Device Role / Timing Role: Primary regulated power source converting variable harvester output (3–15V) to stable 3.3V for MCU and radio. Use Value: 1.8µA quiescent current minimizes standby drain, enabling operation through multi-day dark periods without battery backup. |
Use Scenario: Industrial field nodes requiring isolated, locally regulated 1.8V/3.3V rails from a shared 12V or 24V backplane. IC Role / Device Role / Timing Role: Point-of-load (POL) regulator delivering clean, low-noise power to analog front-ends and precision ADCs. Use Value: Forced continuous mode eliminates burst ripple, ensuring <10mVPP output noise critical for 16-bit+ data acquisition. |
| Multicell Battery Regulator | Low-Power Wireless Systems |
Use Scenario: Portable medical devices using 3×AA/AAA alkaline batteries (4.5V–6V fresh) powering 1.8V logic and 3.3V BLE radio. IC Role / Device Role / Timing Role: Efficient buck converter maintaining regulation as battery voltage declines from 6V to 3.3V cutoff. Use Value: Wide 2.5V–15V input range accommodates full discharge curve; 95% efficiency preserves runtime during active transmission bursts. |
Use Scenario: Bluetooth LE beacons or NFC tags operating from CR2032 coin cells with strict 10-year shelf-life requirements. IC Role / Device Role / Timing Role: Primary voltage regulator supplying MCU and RF IC during brief 100ms advertising intervals. Use Value: Sub-2µA sleep current ensures <1% annual self-discharge - directly extending usable battery life beyond specification limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRVR | Lower IQ (300nA), smaller 1.5mm × 2.0mm WSON, but max 200mA output and narrower 1.8V–6.5V input range. | Better for ultra-long-life coin-cell designs where load ≤200mA and input never exceeds 6.5V. | Choose TPS62840DRVR only if IQ <500nA is mandatory and output current stays below 200mA. |
| MAX17552ATP+ | Higher 600mA output, wider 4.5V–60V input, but 12µA IQ and larger 16-pin TQFN package. | Suitable for industrial 24V/48V distributed systems needing higher current and fault robustness. | Select MAX17552ATP+ when input voltage exceeds 15V or output current demand exceeds 300mA. |
Compared with TPS62840DRVR and MAX17552ATP+, the LTC3103EMSE#TRPBF uniquely balances ultralow 1.8µA IQ, 300mA capability, and 15V input tolerance in a compact MSOP - making it optimal for mid-range energy-harvesting and battery-powered systems where both efficiency and headroom matter.
Availability
LTC3103EMSE#TRPBF is available at Aetrix Electronics and suitable for remote sensor networks, distributed power systems, and low-power wireless systems requiring stable component supply across extended production lifecycles.
Supply support for LTC3103EMSE#TRPBF 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 acquired Linear Technology in 2017 and maintains its legacy of high-performance power management ICs with rigorous automotive and industrial qualification standards.
The LTC3103EMSE#TRPBF belongs to Linear's ultralow-IQ synchronous buck converter family, designed specifically for energy-constrained applications including energy harvesting, battery longevity extension, and always-on sensing nodes.
FAQ
What is the minimum input voltage required for the LTC3103EMSE#TRPBF to start up and regulate?
The LTC3103EMSE#TRPBF has an absolute minimum input voltage of 2.5V after startup, but its undervoltage lockout (UVLO) threshold is 2.1V (typical) with 0.4V hysteresis. Startup requires VIN ≥2.5V; if VIN drops below 2.1V, the device shuts down and will not restart until VIN rises above ~2.5V. The RUN pin can be used to set a custom, more precise UVLO threshold independent of this internal limit.
Can the LTC3103EMSE#TRPBF operate with a 0.6V output voltage?
Yes, the LTC3103EMSE#TRPBF supports output voltages as low as 0.6V, which matches its internal feedback reference voltage. To achieve 0.6V output, connect the FB pin directly to VOUT (i.e., omit the upper resistor in the divider). This configuration is commonly used for powering low-voltage cores in modern microcontrollers and FPGAs.
How does the MODE pin affect efficiency and noise performance of the LTC3103EMSE#TRPBF?
When MODE is pulled high (>1.2V), the LTC3103EMSE#TRPBF enters automatic Burst Mode, reducing quiescent current to 1.8µA at light loads but introducing low-frequency output voltage ripple. When MODE is pulled low (<0.5V), it forces continuous conduction mode - delivering fixed 1.2MHz operation with minimal ripple and lower noise, at the cost of higher light-load IQ (~600µA).
What thermal considerations apply to the LTC3103EMSE#TRPBF in the MSOP package?
The LTC3103EMSE#TRPBF in the 10-pin MSOP package has θJA = 40°C/W. To maintain TJ ≤125°C at full 300mA load, ambient temperature must stay below ~85°C with adequate copper area on the exposed pad. Soldering the exposed pad to a solid GND plane is mandatory for both thermal performance and electrical stability.
Is the PGOOD output of the LTC3103EMSE#TRPBF compatible with 5V logic systems?
Yes - the PGOOD pin is an open-drain output rated for up to 6V pull-up voltage. It can be safely pulled up to 3.3V or 5V logic rails using an external resistor (e.g., 10kΩ). The output pulls low when VOUT falls >10% below regulation, during thermal shutdown, or when the device is disabled - providing robust system-level power monitoring for 5V-tolerant microcontrollers.
LTC3103EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 13.8V
- Current - Output:
- 300mA
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LTC3103EMSE#TRPBF FAQ
1.How can I place an order for LTC3103EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3103EMSE#TRPBF 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 LTC3103EMSE#TRPBF reliable?
The price and inventory of LTC3103EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3103EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3103EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3103EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3103EMSE#TRPBF?
LTC3103EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3103EMSE#TRPBF 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 LTC3103EMSE#TRPBF?
For technical support, including LTC3103EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3103EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3103EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3103EMSE#TRPBF 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 LTC3103EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3103EMSE#TRPBF?
All LTC3103EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3103EMSE#TRPBF, 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 LTC3103EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3103EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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