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Analog Devices Inc. LTC3104IMSE#TRPBF
- Part No.:
- LTC3104IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3104IMSE#TRPBF.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,918
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Product details
Overview
LTC3104IMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter with integrated 10mA adjustable LDO, delivering up to 300mA output current across 2.5V–15V input and 0.6V–13.8V output ranges. It features 2.6µA quiescent current in Burst Mode, 1.2MHz fixed-frequency PWM operation, and power-good status signaling - optimized for ultralow-power remote sensor networks and energy harvesting systems.
For engineers reviewing the LTC3104IMSE#TRPBF datasheet, LTC3104IMSE#TRPBF pinout, LTC3104IMSE#TRPBF application, or LTC3104IMSE#TRPBF equivalent, key selection criteria include light-load efficiency trade-offs between Burst Mode and forced continuous operation, dual-regulation capability (buck + LDO), thermal shutdown behavior, and MSOP-16 package compatibility with high-density PCB layouts.
Technical Context
The LTC3104IMSE#TRPBF implements a current-mode control architecture with internal slope compensation to prevent subharmonic oscillation at high duty cycles. Its dual-path regulation includes a main buck stage with N-channel MOSFET switches (RDS(ON) = 0.65Ω / 0.85Ω) and an independent PMOS-based LDO with 150mV dropout at 10mA.
It supports two mutually exclusive operating modes selected via the MODE pin: automatic Burst Mode (2.6µA IQ, variable frequency) for peak light-load efficiency, and forced continuous conduction (1.2MHz fixed frequency, low-noise) for EMI-sensitive applications. Both modes retain full protection features including thermal shutdown, PGOOD monitoring, and soft-start.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 15V - supports multicell Li-ion, supercapacitor, and wide-input industrial supplies without external pre-regulation. |
| Output Current (Buck) | 300mA continuous - sufficient to power microcontrollers, RF transceivers, and analog sensors in battery-constrained nodes. |
| Quiescent Current | 2.6µA typical in Burst Mode - enables multi-year operation from coin cells or harvested energy sources. |
| Oscillator Frequency | 1.2MHz fixed in forced continuous mode - allows use of small, low-profile inductors (e.g., 10µH) and reduces EMI filtering burden. |
| LDO Output Range | 0.6V to 14.5V - configurable to supply noise-sensitive analog circuitry (e.g., ADC references, op-amps) independently of buck output. |
| Power Good Threshold | –10% FB voltage deviation - provides reliable system-level power sequencing and fault detection with built-in 1ms delay. |
| Thermal Shutdown | 150°C typical activation - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
Package: 16-Lead Plastic MSOP (3mm × 4.9mm × 1.0mm), exposed pad (Pin 17) tied to GND for thermal performance (θJA = 40°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE (Pin 2) | Mode Selection Input | Logic-high (>1.2V) enables Burst Mode; logic-low (<0.5V) forces continuous conduction - no external pull-up/down required. |
| VIN (Pin 3) | Main Input Supply | Primary power source for buck converter; requires ≥10µF ceramic decoupling adjacent to pin for stability and EMI suppression. |
| SW (Pin 4) | Switch Node | Connection point for external inductor; carries high di/dt switching current - must be routed with minimal loop area. |
| BST (Pin 5) | Bootstrap Supply | Drives high-side gate via 22nF capacitor to SW; critical for proper N-MOSFET turn-on - capacitor must be placed <2mm from IC. |
| GND (Pin 6) | Power Ground | Primary return path for buck switching current; connects to exposed pad (Pin 17) for optimal thermal and electrical performance. |
| PGOOD (Pin 8) | Open-Drain Status Output | Asserts low when VOUT drops >10% below regulation or during UVLO/thermal fault - requires external pull-up to valid logic level. |
| RUN (Pin 11) | Enable Comparator Input | Enables converter when voltage exceeds 0.8V threshold; supports precise undervoltage lockout via resistor divider from VIN. |
| FB (Pin 12) | Buck Feedback Input | Sets regulated output voltage via resistive divider; 0.6V reference enables outputs as low as 0.6V with standard resistor values. |
| FBLDO (Pin 13) | LDO Feedback Input | Adjusts LDO output voltage independently; uses same 0.6V reference - allows coordinated or isolated rail generation. |
| VLDO (Pin 14) | LDO Output | Delivers up to 10mA with 150mV dropout; stable with ≥4.7µF ceramic output capacitor - no series ESR required. |
| VINLDO (Pin 15) | LDO Input Supply | Accepts 2.5V–15V; may be connected to buck VOUT, separate supply, or VIN - enables flexible power domain partitioning. |
| RUNLDO (Pin 7) | LDO Enable Control | Logic-high enables LDO; tied to VIN for always-on operation or controlled externally for sequenced power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 2.6µA in Burst Mode enables >10-year battery life in wireless sensor nodes with intermittent wake-up cycles. |
| Dual Independent Regulation | Simultaneous buck (300mA) and LDO (10mA) outputs allow clean analog rails without cross-coupling from switching noise. |
| User-Selectable Operating Mode | Single MODE pin toggles between low-noise continuous PWM and high-efficiency Burst Mode - no firmware or external logic needed. |
| Integrated Protection Suite | Includes thermal shutdown, PGOOD reporting, soft-start, and short-circuit foldback - eliminates need for discrete supervision ICs. |
| Internal Compensation | Reduces BOM count by removing external compensation network; validated across 0.6V–13.8V VOUT range with standard output capacitors. |
Applications
| Remote Sensor Networks | Distributed Power Systems |
|---|---|
|
Use Scenario: Battery-powered environmental sensors transmitting data every 5 minutes via LoRaWAN or NB-IoT. IC Role / Device Role / Timing Role: Primary power regulator converting 3.6V Li-SOCl₂ cell to 3.3V MCU core and 1.8V RF transceiver supply. Use Value: 2.6µA quiescent current extends battery life beyond 12 years; integrated LDO isolates RF noise from precision ADC reference. |
Use Scenario: Industrial IoT gateway with multiple isolated subsystems (modem, PLC interface, local display). IC Role / Device Role / Timing Role: Central point-of-load regulator generating 5V bus from 12V backplane, feeding downstream DC/DCs and LDOs. Use Value: 15V max input accommodates unregulated 12V systems with ripple; PGOOD enables centralized power health monitoring. |
| Multicell Battery Regulator | Energy Harvesters |
|
Use Scenario: Portable medical device powered by two-series Li-ion cells (6V–8.4V) requiring stable 3.3V and 1.2V rails. IC Role / Device Role / Timing Role: Buck stage delivers 300mA to main SoC; LDO provides ultra-low-noise 1.2V for analog front-end. Use Value: Wide 2.5V–15V input handles full battery discharge curve; 0.6V feedback reference supports precise low-voltage outputs. |
Use Scenario: Solar-powered soil moisture sensor using amorphous silicon PV cell (2.8V–4.2V) and supercapacitor buffer. IC Role / Device Role / Timing Role: Primary regulator stepping down harvested voltage to 3.0V for MCU and 2.5V for sensor interface. Use Value: 2.5V minimum input enables startup from weak light conditions; Burst Mode minimizes losses during long idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck + LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | Lower IQ (300nA) but no integrated LDO; 1.8V–5.5V input only; 2-MHz switching. | Best for single-rail, ultra-low-power apps where LDO is unnecessary or added externally. | Select when absolute lowest quiescent current is critical and dual-regulation is not required. |
| MAX17532ATP+T | Higher current (600mA), wider temp range (–40°C to +125°C), but no integrated LDO and higher IQ (12µA). | Suitable for industrial environments needing robustness and higher load capacity, with external LDO added. | Choose when >300mA output or extended temperature operation is mandatory and LDO can be implemented separately. |
Compared with TPS62840DLCR and MAX17532ATP+T, the LTC3104IMSE#TRPBF uniquely integrates both high-efficiency buck conversion and a programmable LDO in one MSOP-16 package - simplifying layout, reducing component count, and enabling true dual-rail power management without compromising light-load efficiency.
Availability
LTC3104IMSE#TRPBF is available at Aetrix Electronics and suitable for remote sensor networks, distributed power systems, and energy harvesting applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3104IMSE#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 high-performance power management portfolio with rigorous qualification standards and automotive-grade reliability testing.
The LTC3104 belongs to Linear's ultralow-quiescent-current DC/DC converter family, designed specifically for battery- and energy-harvesting–powered edge devices where multiyear operation and dual-rail flexibility are essential.
FAQ
What is the maximum output current capability of the LTC3104IMSE#TRPBF buck converter?
The LTC3104IMSE#TRPBF buck converter delivers up to 300mA of continuous output current under typical thermal conditions. This rating assumes adequate PCB copper area for heat dissipation and operation within the specified –40°C to 125°C junction temperature range. Peak current limit is guaranteed at ≥400mA, providing margin for transient loads. Derating applies above 85°C ambient depending on layout and airflow.
How does the MODE pin affect the LTC3104IMSE#TRPBF's efficiency and noise performance?
The MODE pin directly selects between two distinct operating modes: pulling MODE low enables forced continuous conduction (1.2MHz fixed frequency, low output ripple, ~600µA quiescent current), while pulling MODE high activates automatic Burst Mode (variable frequency, 2.6µA quiescent current, higher ripple). The LTC3104IMSE#TRPBF transitions seamlessly between modes based on load - optimizing either efficiency or noise depending on real-time demand.
Can the LTC3104IMSE#TRPBF's integrated LDO be used independently of the buck converter?
Yes - the LTC3104IMSE#TRPBF's 10mA LDO operates independently: it can be powered from VINLDO tied to a separate supply (e.g., backup battery), the buck output (VOUT), or VIN itself (if within 2.5V–15V and respecting absolute max ratings). RUNLDO controls enable/disable, and FBLDO sets its output voltage. The LDO remains active even if the buck converter is disabled via RUN or UVLO, provided VINLDO is valid and RUNLDO is high.
What thermal considerations apply to the LTC3104IMSE#TRPBF in MSOP-16 package?
The LTC3104IMSE#TRPBF in MSOP-16 has θJA = 40°C/W and includes thermal shutdown at ~150°C. To maintain reliability, the exposed pad (Pin 17) must be soldered to a minimum 100mm² internal or external GND plane. For 300mA continuous load at 15V input/3.3V output, power dissipation is ~360mW - resulting in ~14°C rise above ambient with proper layout. Avoid enclosing the IC in thermally insulating housings without airflow.
Does the LTC3104IMSE#TRPBF support start-up into a pre-biased output?
Yes - the LTC3104IMSE#TRPBF supports controlled start-up into a pre-biased output in both Burst Mode and forced continuous operation, as verified in Figures G14–G17 of the datasheet. During start-up, the IC prevents reverse current flow using internal circuitry that monitors SW node voltage and disables the synchronous rectifier until VOUT rises above the target regulation point, avoiding output voltage collapse or damage to downstream circuitry.
LTC3104IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 1.2MHz
- Voltage/Current - Output 1:
- 0.6V ~ 13.8V, 300mA
- Voltage/Current - Output 2:
- 0.6V ~ 14.5V, 10mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.5V ~ 15V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3104IMSE#TRPBF FAQ
1.How can I place an order for LTC3104IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3104IMSE#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 LTC3104IMSE#TRPBF reliable?
The price and inventory of LTC3104IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3104IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3104IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3104IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3104IMSE#TRPBF?
LTC3104IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3104IMSE#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 LTC3104IMSE#TRPBF?
For technical support, including LTC3104IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3104IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3104IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3104IMSE#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 LTC3104IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3104IMSE#TRPBF?
All LTC3104IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3104IMSE#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 LTC3104IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3104IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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