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Analog Devices Inc. LTC3601IMSE#TRPBF
- Part No.:
- LTC3601IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LTC3601IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,942
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Product details
Overview
LTC3601IMSE#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC regulator delivering up to 1.5A output current with 4V–15V input range, 0.6V reference voltage, and adjustable switching frequency from 800kHz to 4MHz. It operates in Burst Mode® (300µA no-load IQ) or forced continuous mode and integrates power MOSFETs, error amplifier, and Power Good status output - deployed in point-of-load power supplies for FPGA core rails and portable instrumentation.
For engineers reviewing the LTC3601IMSE#TRPBF datasheet, LTC3601IMSE#TRPBF pinout, LTC3601IMSE#TRPBF application, or LTC3601IMSE#TRPBF equivalent, key selection criteria include its 16-pin MSOP package with exposed SGND pad, ±5% PGOOD threshold accuracy, 0.6V feedback reference tolerance (±1%), valley current limit of 1.7–2.8A, and programmable soft-start via TRACK pin - all critical for low-noise, high-transient-response 1.2V/1.8V/3.3V system rails.
Technical Context
The LTC3601IMSE#TRPBF employs a phase-lockable controlled on-time, current-mode architecture with internal PLL synchronization - enabling precise frequency alignment to external clocks while maintaining constant-frequency operation even at ultra-low duty cycles (5% at 2.25MHz). Its dual-mode control (Burst Mode® vs forced continuous) directly governs light-load efficiency and output ripple trade-offs.
It integrates top/bottom MOSFETs with 130mΩ/100mΩ RDS(ON), supports output voltage tracking via the TRACK pin, and features VIN overvoltage lockout (16.5V–17.5V), short-circuit foldback protection, and internal 3.3V INTVCC regulator - all implemented within a thermally enhanced 16-lead MSOP package with θJA = 38°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 15V - supports wide-input industrial and battery-powered systems including 2S–3S Li-ion stacks. |
| Output Current | 1.5A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, and DSP subsystems. |
| Switching Frequency | 800kHz to 4MHz (resistor-programmable) - enables compact magnetics; RT = 160kΩ sets 1.4MHz typical. |
| Feedback Reference | 0.600V ±1% - allows precise regulation down to 0.6V output with standard resistor dividers. |
| Quiescent Current | 300µA in Burst Mode® - extends battery life in always-on sensor nodes and portable medical devices. |
| Efficiency | Up to 96% at full load - minimizes thermal stress in enclosed enclosures and high-density PCB layouts. |
| Package | 16-Lead Plastic MSOP with exposed SGND pad - provides robust thermal performance (θJA = 38°C/W) without QFN reflow complexity. |
Pinout & Package
Package: 16-Lead Plastic MSOP (3mm × 4.9mm), exposed pad (Pin 17) connected to SGND - requires soldering to PCB for thermal and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch Node Output | Connects to inductor; swings from PGND to VIN - drives external LC filter and defines power path topology. |
| PGOOD (Pin 16) | Open-Drain Status Output | Pulled low when FB deviates >8% from 0.6V; releases after 40µs filter delay - enables safe power sequencing in multi-rail systems. |
| FB (Pin 9) | Feedback Input | Compares resistive divider output to 0.6V reference - sets regulated VOUT with ±1% accuracy over temperature. |
| MODE/SYNC (Pin 15) | Mode Control / Clock Input | Ground = forced continuous; float/INTVCC = Burst Mode®; external clock = synchronized operation - selects noise-efficiency operating point. |
| TRACK (Pin 11) | Voltage Tracking / Soft-Start | Accepts external voltage <0.6V to servo FB; internal 1.4µA pull-up enables capacitor-based soft-start - ensures monotonic startup and rail tracking. |
| RUN (Pin 12) | Enable Input | Active-high (1.25V threshold); <1V disables regulator - provides clean ON/OFF control with hysteresis for system-level power management. |
| VIN (Pins 13,14) | Main Power Input | 4V–15V supply; decoupled with ≥10µF low-ESR ceramic - powers internal circuitry and top MOSFET driver. |
| SGND (Pin 17) | Signal Ground | Reference for FB, RT, ITH, TRACK - must be star-connected to minimize noise coupling into error amplifier loop. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Reduces no-load IQ to 300µA while maintaining regulation - critical for battery runtime in standby modes. |
| External Frequency Synchronization | Accepts 800kHz–4MHz clock on MODE/SYNC pin - eliminates beat frequencies in multi-converter systems and meets EMI requirements. |
| Programmable Soft-Start | Controlled via external capacitor on TRACK pin - prevents inrush current and ensures orderly power-up across cascaded regulators. |
| Output Voltage Tracking | Tracks external reference voltage below 0.6V - enables coordinated ramp-up of multiple rails (e.g., core + I/O) to avoid reverse bias stress. |
| Short-Circuit Foldback Protection | Reduces valley current limit to ~0.7A during output short - limits power dissipation and protects input source without latch-off. |
| Integrated 3.3V INTVCC Regulator | Supplies gate drive and internal logic; rated for ≤5mA load - eliminates need for external bias supply in most applications. |
Applications
| Point-of-Load Regulation | FPGA Core Power Supply |
|---|---|
Use Scenario: Local DC/DC conversion near high-current digital loads on dense PCBs with strict thermal constraints. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable 1.2V/1.8V core voltage with fast transient response. Use Value: 96% peak efficiency and 400–700µs internal soft-start prevent rail collapse during FPGA configuration bursts. |
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V core rails requiring tight voltage tolerance and sequencing. IC Role / Device Role / Timing Role: Regulator with TRACK pin enabling voltage ramp coordination with auxiliary I/O supply. Use Value: ±1% reference accuracy and ±5% PGOOD window ensure reliable FPGA boot and avoid configuration errors. |
| Lithium-Ion Portable Instruments | Distributed Power Systems |
Use Scenario: Handheld test equipment powered by 2-cell Li-ion (6V–8.4V) needing low quiescent current and compact solution size. IC Role / Device Role / Timing Role: Main system regulator operating in Burst Mode® during sleep, forced continuous during measurement. Use Value: 300µA no-load IQ extends battery life; 16-pin MSOP footprint saves board space versus QFN alternatives. |
Use Scenario: Modular industrial controller with isolated DC bus feeding multiple local regulators. IC Role / Device Role / Timing Role: Synchronized buck converter slaved to system clock to suppress conducted EMI across backplane. Use Value: External SYNC capability eliminates frequency beating; 15V max input accommodates 12V nominal bus with transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8610IMSE#TRPBF | Higher input range (3V–42V), lower IQ (2.5µA), but fixed 2MHz frequency and no TRACK pin. | Better suited for automotive 12V systems with cold-crank tolerance; lacks output tracking for multi-rail sequencing. | Select when input exceeds 15V or ultra-low IQ dominates design priorities over rail coordination. |
| TPS54331DR | 3.5A output, 3.5V–28V input, but requires external MOSFETs and has higher 125µA shutdown current. | Supports higher current loads but increases BOM count and layout complexity; no integrated PGOOD or soft-start. | Choose when >1.5A output or wider input range is mandatory and discrete FET layout is acceptable. |
Compared with LT8610IMSE#TRPBF and TPS54331DR, the LTC3601IMSE#TRPBF uniquely balances 1.5A capability, 4–15V input, integrated tracking/soft-start, and Burst Mode® efficiency - making it optimal for space-constrained, multi-rail embedded systems where sequencing and low-noise operation are essential.
Availability
LTC3601IMSE#TRPBF is available at Aetrix Electronics and suitable for point-of-load regulation, FPGA core power supply, and lithium-ion portable instruments requiring stable component supply across production lifecycles.
Supply support for LTC3601IMSE#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 precision power management portfolio with rigorous qualification and long-term product support.
The LTC3601IMSE#TRPBF belongs to Linear's monolithic synchronous buck regulator family, designed specifically for high-efficiency, low-noise, and thermally constrained point-of-load applications in industrial, medical, and portable electronics.
FAQ
What is the maximum input voltage rating for the LTC3601IMSE#TRPBF?
The LTC3601IMSE#TRPBF has an absolute maximum VIN rating of 16V, with overvoltage lockout activating at 16.5V (falling) and 17.5V (rising). Operation above 15V violates the recommended operating range and risks permanent damage. The device resumes normal regulation immediately upon VIN dropping below 16.5V, without requiring soft-start restart.
How does the TRACK pin function on the LTC3601IMSE#TRPBF?
The TRACK pin on the LTC3601IMSE#TRPBF accepts an external voltage below 0.6V to force the FB pin to track that voltage during startup or sequencing. An internal 1.4µA pull-up current from INTVCC enables soft-start when a capacitor is connected between TRACK and ground - allowing monotonic VOUT ramp-up and coordination with other rails.
Can the LTC3601IMSE#TRPBF operate without external compensation components?
Yes, the LTC3601IMSE#TRPBF supports internal compensation: connecting the ITH pin directly to INTVCC configures the default loop response. For optimized transient performance or non-standard output capacitors, external RC networks can be added to ITH - but this is optional, not required for basic operation.
What is the thermal resistance (θJA) of the LTC3601IMSE#TRPBF in its MSOP package?
The LTC3601IMSE#TRPBF in the 16-lead MSOP package has a junction-to-ambient thermal resistance (θJA) of 38°C/W under standard JEDEC 2-layer board conditions. This value assumes proper soldering of the exposed SGND pad to a thermal pad on the PCB - failure to do so degrades thermal performance significantly.
Does the LTC3601IMSE#TRPBF support external clock synchronization?
Yes, the LTC3601IMSE#TRPBF supports external clock synchronization via the MODE/SYNC pin across its full 800kHz–4MHz operating range. When driven by an external clock, the internal PLL locks to both phase and frequency - ensuring deterministic timing and eliminating beat frequencies in multi-regulator systems.
LTC3601IMSE#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
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 14.52V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3601IMSE#TRPBF FAQ
1.How can I place an order for LTC3601IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3601IMSE#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 LTC3601IMSE#TRPBF reliable?
The price and inventory of LTC3601IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3601IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3601IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3601IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3601IMSE#TRPBF?
LTC3601IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3601IMSE#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 LTC3601IMSE#TRPBF?
For technical support, including LTC3601IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3601IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3601IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3601IMSE#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 LTC3601IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3601IMSE#TRPBF?
All LTC3601IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3601IMSE#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 LTC3601IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3601IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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