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Analog Devices Inc. LTC3103EDD#TRPBF
- Part No.:
- LTC3103EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC3103EDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 300MA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,384
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Product details
Overview
LTC3103EDD#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 output, 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 LTC3103EDD#TRPBF datasheet, LTC3103EDD#TRPBF pinout, LTC3103EDD#TRPBF application, or LTC3103EDD#TRPBF equivalent, key selection considerations include its dual-mode operation (Burst vs. forced continuous), integrated power-good flag, thermal shutdown protection, soft-start control, and compatibility with low-ESR ceramic output capacitors in space-constrained DFN layouts.
Technical Context
The LTC3103EDD#TRPBF employs a current-mode PWM architecture with internal slope compensation to ensure stability across wide duty cycles (up to 92%). Its dual N-channel MOSFET power stage features RDS(ON) of 0.65Ω (main switch) and 0.85Ω (synchronous rectifier), supporting efficient regulation at light loads without external diodes.
It integrates a precision RUN comparator (0.80V threshold, 60mV hysteresis), programmable MODE pin logic (0.5–1.2V threshold), and a 1.2MHz fixed-frequency oscillator (±25% over temperature). The PGOOD open-drain output asserts low when VFB falls >10% below 0.6V, during thermal shutdown or UVLO - providing system-level fault monitoring without external circuitry.
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, low-power MCUs, and analog sensors in compact IoT endpoints. |
| Quiescent Current (Burst Mode) | 1.8µA - enables >10-year battery life in wireless sensor nodes with intermittent wake-up cycles. |
| Switching Frequency | 1.2MHz (fixed) - allows use of small, low-profile inductors (e.g., 10µH) and reduces EMI filtering footprint. |
| Feedback Reference Voltage | 0.600V ±2% - high accuracy enables tight output regulation (±1.5%) across line, load, and temperature. |
| Thermal Shutdown Threshold | 150°C (typical) - protects against sustained overload or poor PCB thermal design; auto-restarts at ~130°C. |
Pinout & Package
Package: 10-pin (3mm × 3mm × 0.75mm) thermally enhanced plastic DFN with exposed GND pad (Pin 11). Requires soldering of exposed pad to PCB ground plane for θJA = 58°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.5–15V; requires ≥10µF ceramic decoupling adjacent to pin for stable high-frequency switching. |
| SW (Pin 2) | Switch node | Connects to inductor; carries high dv/dt and pulsed current - must be routed short and away from noise-sensitive traces. |
| BST (Pin 3) | Bootstrap supply | Drives high-side gate via 22nF capacitor to SW; critical for start-up into pre-biased outputs and sleep recovery. |
| GND (Pin 4) | Power ground | Primary return path for power switches; connects to exposed pad (Pin 11) - must tie to solid ground plane. |
| PGOOD (Pin 5) | Open-drain status output | Pulls low if VOUT drops >10%, during thermal shutdown, or UVLO; requires external pull-up to ≤6V rail. |
| VCC (Pin 6) | Internal bias rail | Regulated ~3.3V supply for control circuitry; decouple with ≥1µF ceramic close to pin. |
| RUN (Pin 7) | Enable comparator input | 0.80V threshold enables precise undervoltage lockout; 60mV hysteresis prevents chatter near trip point. |
| FB (Pin 8) | Error amplifier input | Senses resistive divider from VOUT; 1–20nA input current minimizes divider power loss. |
| NC (Pin 9) | No-connect | Must be tied to GND - not floating - to prevent coupling noise into sensitive analog circuitry. |
| MODE (Pin 10) | Operation mode select | ≥1.2V = Burst Mode (low IQ); ≤0.5V = forced continuous (low noise); 0.5–1.2V = undefined state. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow quiescent current | 1.8µA in Burst Mode enables decade-scale battery life in always-on sensor applications. |
| Synchronous rectification | Integrated N-MOSFETs eliminate external Schottky losses - sustains >90% efficiency at 10mA load. |
| User-selectable operating mode | Hardware-configurable MODE pin eliminates firmware dependency for noise vs. efficiency trade-offs. |
| Integrated soft-start | 1.4ms typical duration prevents inrush current - critical for powering downstream LDOs or FPGAs. |
| Accurate power-good signaling | PGOOD provides deterministic system reset timing with 1ms enable delay and built-in deglitching. |
| Thermal and current protection | Auto-shutdown at 150°C + peak current limit ≥400mA prevent damage under fault conditions. |
Applications
| Remote Sensor Networks | Distributed Power Systems |
|---|---|
Use Scenario: Wireless environmental sensors powered by coin-cell batteries or ambient energy harvesters. IC Role / Device Role / Timing Role: Primary voltage regulator converting harvested microwatts or battery voltage to stable 1.8V/3.3V for MCU and radio. Use Value: 1.8µA quiescent current extends operational lifetime beyond 10 years on CR2032; Burst Mode ensures rapid wake-up response. |
Use Scenario: Industrial field devices requiring local 3.3V/5V rails from 12–24V distributed bus supplies. IC Role / Device Role / Timing Role: Point-of-load regulator delivering clean, regulated power to isolated communication interfaces and analog front-ends. Use Value: 1.2MHz switching enables compact 10µH inductors and low-ESR ceramic caps - reducing board area by >40% vs. lower-frequency alternatives. |
| Multicell Battery Regulator | Energy Harvesters |
Use Scenario: Portable medical monitors using 3×AA or LiFePO4 packs with variable discharge profiles. IC Role / Device Role / Timing Role: Input-stage buck converter maintaining constant 3.3V output as battery voltage drops from 4.5V to 2.7V. Use Value: 2.5V minimum input and 92% max duty cycle support full utilization of battery capacity - extending runtime by 15–20%. |
Use Scenario: Solar- or thermal-energy-harvested nodes charging supercapacitors to power intermittent sensing bursts. IC Role / Device Role / Timing Role: Supercapacitor-to-load regulator managing wide input (0.5–5V) and delivering stable 2.2V/3.3V output. Use Value: Automatic Burst Mode minimizes leakage during idle periods; BST circuit ensures reliable start-up even after long sleep. |
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), but 2A max output and 2.7–6V input range - narrower VIN, higher IOUT. | Better for ultra-low-power wearables needing <1µA sleep; unsuitable for 12V input or >6V sources. | Select TPS62840DRVR only if input is strictly ≤6V and sub-µA IQ is mandatory - LTC3103EDD#TRPBF remains superior for 12–15V industrial inputs. |
| MAX17690ATP+ | Higher 2A output, 4.5–60V input, but 12µA IQ and no Burst Mode - lacks ultralow-IQ capability. | Targeted at industrial 24V/48V systems where efficiency at medium loads matters more than sleep current. | Choose MAX17690ATP+ for wide-input, high-current designs; LTC3103EDD#TRPBF is preferred when battery life or energy harvesting dominates requirements. |
Compared with TPS62840DRVR and MAX17690ATP+, the LTC3103EDD#TRPBF uniquely balances 1.8µA quiescent current, 15V input tolerance, and integrated PGOOD - making it the only option capable of serving both energy-harvesting nodes and 12V industrial subsystems without compromise.
Availability
LTC3103EDD#TRPBF is available at Aetrix Electronics and suitable for remote sensor networks, distributed power systems, and energy-harvesting applications requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC3103EDD#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-grade qualification and long-term product support.
The LTC3103 belongs to Linear's ultralow-power DC/DC converter family, designed specifically for battery-constrained and energy-harvesting applications where nanoscale quiescent current and robust start-up behavior are non-negotiable.
FAQ
What is the minimum input voltage required for the LTC3103EDD#TRPBF to operate?
The LTC3103EDD#TRPBF has a guaranteed minimum input voltage of 2.5V after start-up, with an undervoltage lockout (UVLO) threshold of 2.1V (typical) that disables the converter if VIN drops below this level. The RUN pin can also be configured as a precision UVLO with externally set thresholds - ensuring reliable operation across the full 2.5V–15V input range specified for the LTC3103EDD#TRPBF.
How does the MODE pin affect the performance of the LTC3103EDD#TRPBF?
The MODE pin on the LTC3103EDD#TRPBF selects between two distinct operating modes: pulling MODE ≤0.5V enables forced continuous conduction for low-noise, fixed-frequency (1.2MHz) operation, while holding MODE ≥1.2V activates automatic Burst Mode for ultralow 1.8µA quiescent current at light loads. Intermediate voltages are undefined - the LTC3103EDD#TRPBF requires clean logic-level control to avoid unstable transitions.
Can the LTC3103EDD#TRPBF start up into a pre-biased output?
Yes, the LTC3103EDD#TRPBF supports start-up into a pre-biased output thanks to its proprietary BST circuit and internal comparator that verifies sufficient bootstrap capacitor voltage before enabling the high-side switch. This feature prevents reverse current flow and ensures controlled ramp-up even when VOUT is already partially charged - a critical capability for hot-swap and redundancy applications involving the LTC3103EDD#TRPBF.
What is the function of the NC pin (Pin 9) on the LTC3103EDD#TRPBF?
Pin 9 of the LTC3103EDD#TRPBF is designated NC (No Connect) and must be tied to GND - not left floating - to prevent coupling of switching noise into the internal error amplifier and control logic. Leaving Pin 9 unconnected may cause erratic regulation, increased output ripple, or failure to enter Burst Mode reliably; grounding it ensures signal integrity and meets the layout requirements specified in the LTC3103EDD#TRPBF datasheet.
Does the LTC3103EDD#TRPBF include thermal protection?
Yes, the LTC3103EDD#TRPBF incorporates thermal shutdown protection that disables all power switches when the junction temperature exceeds 150°C (typical). During shutdown, the SW node enters high-impedance state and the soft-start circuit resets. The LTC3103EDD#TRPBF automatically recovers when die temperature falls to approximately 130°C - preventing permanent damage while allowing graceful resumption of operation once cooling occurs.
LTC3103EDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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-DFN (3x3)
LTC3103EDD#TRPBF FAQ
1.How can I place an order for LTC3103EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3103EDD#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 LTC3103EDD#TRPBF reliable?
The price and inventory of LTC3103EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3103EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3103EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3103EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3103EDD#TRPBF?
LTC3103EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3103EDD#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 LTC3103EDD#TRPBF?
For technical support, including LTC3103EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3103EDD#TRPBF requirements.
6.How does Aetrix verify that LTC3103EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3103EDD#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 LTC3103EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3103EDD#TRPBF?
All LTC3103EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3103EDD#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 LTC3103EDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC3103EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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