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Analog Devices Inc. LTC3104EMSE#TRPBF
- Part No.:
- LTC3104EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3104EMSE#TRPBF.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,140
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Product details
Overview
LTC3104EMSE#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 - enabling ultra-low-power regulation in energy-harvesting and remote sensor systems.
For engineers reviewing the LTC3104EMSE#TRPBF datasheet, LTC3104EMSE#TRPBF pinout, LTC3104EMSE#TRPBF application, or LTC3104EMSE#TRPBF equivalent, key selection criteria include light-load efficiency optimization via MODE pin control, independent LDO enablement via RUNLDO, thermal shutdown behavior at 150°C, and compatibility with 10µH inductors and ceramic output capacitors ≥4.7µF for stable low-noise operation.
Technical Context
The LTC3104EMSE#TRPBF implements a current-mode, constant-frequency synchronous buck architecture with internal N-channel MOSFETs (0.65Ω main switch, 0.85Ω synchronous rectifier), slope compensation to prevent subharmonic oscillation, and peak current limiting ≥400mA. Its dual-mode control logic allows seamless transition between Burst Mode (for <2.6µA no-load IQ) and forced continuous conduction (for 1.2MHz low-noise operation).
It integrates two independent regulation paths: the main buck converter with programmable feedback reference (0.6V ±2%) and soft-start (1.4ms typical), plus a standalone PMOS-based LDO (dropout 150mV @10mA) powered from VINLDO with separate FBLDO feedback and RUNLDO enable. Both paths share thermal shutdown (150°C trip, 130°C recovery) and undervoltage lockout (2.1V rising threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 15V - supports multicell Li-ion, supercapacitor, and wide-input industrial rails without external pre-regulation. |
| Output Current (Buck) | 300mA - sufficient for microcontrollers, RF transceivers, and analog sensors in compact battery-powered nodes. |
| Quiescent Current (Burst Mode) | 2.6µA - enables multi-year operation from small energy harvesters or coin cells under light load. |
| Oscillator Frequency | 1.2MHz fixed - permits use of small, low-profile 10µH inductors and minimizes EMI filtering requirements. |
| LDO Output Current | 10mA - powers noise-sensitive analog circuitry (e.g., ADC references, op-amps) independently of buck switching noise. |
| Feedback Reference Voltage | 0.6V ±2% - enables precise, low-voltage rail generation (e.g., 1.2V, 1.8V, 3.3V) with standard resistor dividers. |
| Power Good Threshold | −10% hysteresis on FB - provides reliable system reset signaling with built-in 1ms delay after startup. |
Pinout & Package
Package: 16-Lead Plastic MSOP (3mm × 4.9mm × 1.1mm), thermally enhanced with exposed pad (Pin 17 = GND). Requires soldering of exposed pad to PCB ground plane for θJA = 40°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE (Pin 2) | Mode Selection Input | High (>1.2V) enables automatic Burst Mode; low (<0.5V) forces continuous 1.2MHz PWM - no external clock required. |
| VIN (Pin 3) | Main Power Input | Primary supply for buck converter; requires ≥10µF ceramic decoupling adjacent to pin for stability and EMI reduction. |
| SW (Pin 4) | Switch Node | Connects to inductor; carries high di/dt switching current - layout critical to minimize parasitic inductance and ringing. |
| BST (Pin 5) | Bootstrap Supply | Drives high-side gate via 22nF capacitor to SW; ensures sufficient VGS for efficient N-MOSFET conduction. |
| GND (Pin 6) | Power Ground | Common return for buck power path; must be low-impedance connection to exposed pad and system ground. |
| RUNLDO (Pin 7) | LDO Enable Control | Logic-high (>0.8V) activates LDO; tied to VIN for always-on LDO operation independent of buck enable state. |
| PGOOD (Pin 8) | Open-Drain Status Output | Pulls low if VOUT drops >10% below regulation, during thermal shutdown, or UVLO - requires external pull-up. |
| VCC (Pin 10) | Internal Bias Rail | Internally regulated ~3.3V supply for control circuitry; decoupled with ≥1µF ceramic capacitor. |
| RUN (Pin 11) | Enable Comparator Input | Enables converter when >0.85V; configurable as precision UVLO using external resistor divider from VIN. |
| FB (Pin 12) | Buck Feedback Input | Connects to resistor divider from VOUT; sets output voltage per VOUT = 0.6V × (1 + R1/R2). |
| FBLDO (Pin 13) | LDO Feedback Input | Connects to resistor divider from VLDO; sets LDO output voltage per VLDO = 0.6V × (1 + R3/R4). |
| VLDO (Pin 14) | LDO Output | Provides clean, low-noise auxiliary rail; requires ≥4.7µF ceramic decoupling for stability across all load conditions. |
| VINLDO (Pin 15) | LDO Input Supply | Accepts 2.5V–15V input; may be connected to VOUT (buck), VIN, or independent source - defines LDO headroom. |
| NC (Pins 1, 9, 16) | No Connect | Must be tied to GND per datasheet - not floating; avoids unintended coupling or ESD susceptibility. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Burst Mode® Operation | Reduces no-load input current to 2.6µA while maintaining regulation - extends battery life in intermittently active IoT endpoints. |
| Integrated 10mA Adjustable LDO | Delivers low-noise auxiliary power with 150mV dropout and stability across 4.7µF–100µF output capacitance - eliminates need for discrete LDO. |
| User-Selectable Operating Mode | Single MODE pin toggles between low-noise continuous PWM (1.2MHz) and high-efficiency Burst Mode - no firmware or external logic required. |
| Accurate RUN Pin Threshold | 0.8V ±0.05V enable threshold with 60mV hysteresis - enables precise, resistor-programmable undervoltage lockout for system-level brownout protection. |
| Thermal Shutdown with Hysteresis | Shuts down at 150°C (typical), restarts at 130°C - prevents thermal runaway during overload or poor heatsinking without requiring external monitoring. |
| Power-Good Status Output | Open-drain PGOOD with 1ms delay and −10% trip threshold - provides deterministic system reset timing compatible with µC reset inputs. |
Applications
| Remote Sensor Networks | Distributed Power Systems |
|---|---|
Use Scenario: Wireless environmental node powered by solar harvester with intermittent illumination and µA-level average load. IC Role / Device Role / Timing Role: Primary voltage regulator converting variable harvester output (3–12V) to stable 3.3V for MCU and radio; LDO supplies clean 1.8V for RF front-end. Use Value: 2.6µA quiescent current enables >5-year operation on 100mAh Li-SOCl₂ cell; Burst Mode maintains regulation during dark periods without wake-up latency. |
Use Scenario: Industrial PLC I/O module with isolated 24V bus powering multiple local rails (5V, 3.3V, 1.8V). IC Role / Device Role / Timing Role: Point-of-load regulator generating 3.3V from 24V intermediate bus; LDO provides noise-isolated 1.8V for high-speed serial interface. Use Value: Wide 2.5–15V input accommodates 24V bus derating; 300mA output supports multiple peripherals; PGOOD signals rail health to system controller. |
| Multicell Battery Regulator | Energy Harvesters |
Use Scenario: Portable medical device using 3×Li-ion stack (9–12.6V) powering mixed-signal SoC and display backlight. IC Role / Device Role / Timing Role: Main buck converter delivering 3.3V/300mA; LDO supplies 1.2V core voltage with ripple rejection >60dB at 100kHz. Use Value: 15V absolute max input withstands battery surge; 95% peak efficiency reduces thermal load in sealed enclosure; MODE pin enables low-noise mode during data acquisition. |
Use Scenario: Structural health monitor harvesting vibration energy via piezoelectric transducer (0.5–5V, µW–mW range). IC Role / Device Role / Timing Role: Ultra-low-IQ regulator stepping harvested voltage to 2.2V for BLE SoC; LDO powers analog sensor front-end. Use Value: 2.6µA sleep current matches harvester's µA-level idle output; automatic Burst Mode eliminates manual mode switching; 0.6V FB reference enables regulation down to 1.2V output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter with integrated LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | Lower IQ (300nA), but only 200mA output; no integrated LDO; 1.8–6.5V input; requires external LDO for dual-rail designs. | Suitable for single-rail, ultra-deep-sleep applications where LDO is implemented separately or unnecessary. | Select when minimum quiescent current dominates over dual-rail integration and output current needs are ≤200mA. |
| MAX17651ATP+T | Higher output current (600mA), wider input (4.5–60V), but IQ = 120µA; no integrated LDO; requires external bias for gate drive. | Applicable in higher-voltage industrial or automotive environments where 15V max input is insufficient. | Select when input exceeds 15V or load demands >300mA, accepting higher IQ and external LDO requirement. |
Compared with TPS62840DLCR and MAX17651ATP+T, the LTC3104EMSE#TRPBF uniquely balances ultra-low 2.6µA IQ, integrated 10mA LDO, and 300mA buck capability in a single 16-pin MSOP - making it optimal for space-constrained, dual-rail, energy-limited systems where discrete LDO addition would increase BOM cost and PCB area.
Availability
LTC3104EMSE#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 LTC3104EMSE#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC3104 product line was designed specifically for ultra-low-power, wide-input DC/DC conversion in energy-constrained systems - emphasizing sub-µA quiescent operation, integrated auxiliary regulation, and robust fault protection without external components.
FAQ
What is the maximum input voltage rating for the LTC3104EMSE#TRPBF?
The LTC3104EMSE#TRPBF has an absolute maximum input voltage rating of 18V on the VIN pin. However, its specified operating input range is 2.5V to 15V. Exceeding 15V may cause undefined behavior or reduced reliability, even if below the 18V absolute limit. The VINLDO pin also has a 17V absolute maximum, reinforcing the need to stay within 15V for normal operation.
Can the LTC3104EMSE#TRPBF operate with a pre-biased output during startup?
Yes, the LTC3104EMSE#TRPBF supports start-up into a pre-biased output in both Burst Mode and forced continuous mode, as confirmed in the Typical Performance Characteristics section (Figures G14–G17). Its internal control logic prevents reverse current flow and ensures controlled soft-start even when VOUT is initially non-zero, making it suitable for hot-swap and redundant power applications.
How does the MODE pin affect efficiency and noise performance of the LTC3104EMSE#TRPBF?
When the MODE pin is pulled high (>1.2V), the LTC3104EMSE#TRPBF enters automatic Burst Mode, reducing no-load IQ to 2.6µA but introducing low-frequency output voltage ripple. When pulled low (<0.5V), it operates in forced continuous mode at 1.2MHz, eliminating burst-related ripple and harmonics but increasing light-load IQ to ~600µA - a trade-off between efficiency and noise sensitivity.
What is the recommended output capacitor for the LDO section of the LTC3104EMSE#TRPBF?
The LTC3104EMSE#TRPBF LDO (VLDO pin) is specified to be stable with a minimum 4.7µF ceramic capacitor and remains stable across arbitrarily large capacitance values (e.g., 100µF) without requiring series resistance. This eliminates ESR constraints and simplifies design for low-noise analog rails where bulk capacitance improves transient response.
Does the LTC3104EMSE#TRPBF provide short-circuit protection on its LDO output?
Yes, the LTC3104EMSE#TRPBF LDO includes short-circuit protection with a current limit of 15–20mA (typical), as specified in the Electrical Characteristics table. During a short, the LDO shuts down and recovers automatically once the fault is removed - independent of the main buck converter's status and thermal shutdown behavior.
LTC3104EMSE#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
LTC3104EMSE#TRPBF FAQ
1.How can I place an order for LTC3104EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3104EMSE#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 LTC3104EMSE#TRPBF reliable?
The price and inventory of LTC3104EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3104EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3104EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3104EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3104EMSE#TRPBF?
LTC3104EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3104EMSE#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 LTC3104EMSE#TRPBF?
For technical support, including LTC3104EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3104EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3104EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3104EMSE#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 LTC3104EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3104EMSE#TRPBF?
All LTC3104EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3104EMSE#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 LTC3104EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3104EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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