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Analog Devices Inc. LTC3630IMSE#TRPBF
- Part No.:
- LTC3630IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,161
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Product details
Overview
LTC3630IMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–65V input, synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs, delivering up to 500mA output current, featuring 12µA quiescent current in Burst Mode® operation, and supporting programmable peak current limits from 120mA to 1.2A. It is used in industrial control supplies and battery-operated devices requiring wide-input regulation with minimal no-load power draw.
For engineers reviewing the LTC3630IMSE#TRPBF datasheet, LTC3630IMSE#TRPBF pinout, LTC3630IMSE#TRPBF application, or LTC3630IMSE#TRPBF equivalent, key selection considerations include its 0.8V ±1% feedback reference, 100% duty-cycle dropout capability, precise RUN pin threshold (1.21V rising), internal soft-start, and FBO-enabled current paralleling - all within a thermally enhanced 16-lead MSOP package rated for –40°C to 125°C junction temperature.
Technical Context
The LTC3630IMSE#TRPBF employs Burst Mode® control with hysteretic feedback to achieve ultra-low quiescent current (12µA) while maintaining regulation across load currents from µA to 500mA. Its architecture uses an internal 0.8V reference comparator, programmable peak current sensing via ISET pin (5µA current source), and dual-stage RUN pin hysteresis (110mV) for robust start-up sequencing.
It integrates synchronous power switches (P-channel high-side, N-channel low-side), eliminating external diodes and enabling 100% duty-cycle operation for low-dropout regulation. The FBO pin provides open-collector feedback comparator output to synchronize multiple converters for higher-current applications without external timing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports wide-range industrial, automotive, and avionics inputs without pre-regulation. |
| Output Current | Up to 500mA average - limited to half the programmed peak current (e.g., 1.2A peak → 600mA theoretical max, derated to 500mA guaranteed). |
| Quiescent Current | 12µA typical in Burst Mode® - enables multi-year battery life in always-on sensor nodes. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation with minimal external resistor tolerance impact. |
| Peak Current Programming | 120mA to 1.2A via ISET pin resistor - allows optimization of inductor size, output ripple, and light-load efficiency. |
| Run Threshold | 1.21V rising / 1.10V falling - provides clean, hysteresis-controlled enable/disable with <110mV noise margin. |
| Duty Cycle Limit | 100% - sustains regulation down to VIN ≈ VOUT, critical for brownout resilience in battery systems. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16), 3mm × 4.9mm footprint, 0.75mm profile, exposed thermal pad (Pin 17) soldered to PCB ground for θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connection point between internal high-side and low-side MOSFETs; ties to inductor; carries high dv/dt switching waveform. |
| VIN (3) | Main input supply | Accepts 4V–65V input; requires local ceramic bypass capacitor to GND for stability and EMI suppression. |
| RUN (5) | Enable control input | 1.21V rising threshold enables operation; 0.7V falling forces shutdown (5µA IQ); internal 2MΩ pull-up enables UVLO via resistor divider. |
| VPRG1/VPRG2 (6,7) | Output voltage selection | Configure fixed 1.8V/3.3V/5V or adjustable mode by grounding or connecting to SS; eliminates external feedback resistors for standard outputs. |
| GND (8,14,16,17) | Ground reference & thermal path | Multiple GND pins + exposed pad (Pin 17) must be soldered to PCB ground plane for thermal integrity and noise immunity. |
| VFB (9) | Feedback input | Compares divided output voltage against 0.8V reference; directly connected to VOUT in fixed-output mode. |
| SS (10) | Soft-start control | Capacitor-to-GND sets output ramp time (1ms per 16.5nF); internal 0.8ms default ensures controlled start-up without input droop. |
| ISET (11) | Peak current programming | 5µA current source to GND resistor sets peak inductor current; floating = 1.2A typical, grounded = 120mA typical. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) to parallel multiple LTC3630s by driving slave VFB pins. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET integration | Eliminates external catch diode, reduces conduction loss, and enables 100% duty cycle for ultra-low dropout operation. |
| Burst Mode® operation | Maintains regulation at µA loads while drawing only 12µA VIN supply current - ideal for energy-harvesting and battery-backed systems. |
| Programmable peak current limit | Adjusts inductor size, output ripple, and component count via single resistor on ISET pin (120mA–1.2A range). |
| Fixed-output configuration support | VPRG1/VPRG2 pins select 1.8V/3.3V/5V without external resistors - reduces BOM count and layout sensitivity in cost-sensitive designs. |
| Multi-unit current paralleling | FBO pin enables master-slave synchronization of up to four LTC3630IMSE#TRPBF units for >2A total output without external clock or phase control. |
Applications
| Industrial Control Supplies | Medical Devices |
|---|---|
Use Scenario: Powering isolated analog front-ends and microcontrollers in PLC I/O modules operating from 24VDC rails with frequent standby periods. IC Role / Device Role / Timing Role: Primary 3.3V/5V regulator delivering stable, low-noise supply with fast transient response to digital logic and ADC references. Use Value: 12µA quiescent current extends system uptime during brownouts; 65V max input tolerates industrial transients; FBO enables redundant rail scaling. |
Use Scenario: Providing regulated 3.3V for portable ultrasound probe electronics powered by Li-ion batteries (8–26V range). IC Role / Device Role / Timing Role: Main DC/DC converter supplying FPGA, RF transceivers, and precision amplifiers with tight voltage accuracy and low EMI. Use Value: 0.8V ±1% reference ensures consistent ADC/DAC performance; Burst Mode® preserves battery charge during idle scanning intervals. |
| Distributed Power Systems | Automotive Infotainment |
Use Scenario: Local point-of-load regulation in telecom base station subracks where 48V backplane feeds multiple 5V/3.3V domains. IC Role / Device Role / Timing Role: Synchronous buck regulator with paralleling capability to scale current per board section without redesign. Use Value: FBO-based current sharing avoids complex current-sense circuits; MSE16 package fits dense PCB layouts; 125°C rating suits enclosed enclosures. |
Use Scenario: Powering display controllers and audio codecs in vehicle head units supplied from 9–16V battery with cold-crank (4.5V) and load-dump (60V) extremes. IC Role / Device Role / Timing Role: Input-tolerant step-down regulator maintaining 5V output during engine cranking and alternator surges. Use Value: 4V–65V input range covers full automotive transient profile; RUN pin hysteresis prevents erratic cycling during voltage sags. |
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 |
|---|---|---|---|
| LT8610IMSE#TRPBF | Higher 42V max input, 3.5A output, Silent Switcher® architecture; 2.5µA IQ but no programmable peak current. | Preferred for noise-sensitive RF/analog systems; lacks FBO paralleling and fixed-output pin strapping. | Select when EMI reduction and higher current are critical; avoid if VPRG/FBO features or 65V input are required. |
| TPS54360BQPWPRQ1 | Automotive-grade (AEC-Q100), 60V input, 3.5A output, 14µA IQ; external compensation required; no integrated FBO or VPRG pins. | Designed for under-hood use; requires additional components for soft-start and output setting; no built-in current sharing. | Choose for automotive production with qualification requirements; not suitable for space-constrained or low-BOM-count designs needing pin-strapped outputs. |
Compared with LT8610IMSE#TRPBF and TPS54360BQPWPRQ1, the LTC3630IMSE#TRPBF uniquely combines 65V input tolerance, pin-strappable fixed outputs, FBO-enabled paralleling, and 12µA Burst Mode® IQ in a compact MSOP - making it optimal for industrial and portable systems prioritizing simplicity, wide input range, and multi-unit scalability over raw current or automotive certification.
Availability
LTC3630IMSE#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, medical devices, and distributed power systems requiring stable component supply with extended temperature support (–40°C to 125°C) and long-term obsolescence management.
Supply support for LTC3630IMSE#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, Inc. (ADI) acquired Linear Technology in 2017 and maintains its high-performance power management portfolio with rigorous reliability testing and long-term product support.
The LTC3630IMSE#TRPBF belongs to ADI's legacy Linear Technology high-voltage synchronous buck converter family, designed specifically for wide-input industrial, medical, and avionics applications where ultra-low quiescent current, input ruggedness, and design simplicity are critical.
FAQ
What is the maximum input voltage rating for the LTC3630IMSE#TRPBF?
The LTC3630IMSE#TRPBF has an absolute maximum input voltage rating of 70V, with a specified operating range of 4V to 65V. Operation beyond 65V is not guaranteed and may trigger internal protection or cause permanent damage. The 65V upper limit ensures reliable performance across industrial and automotive transients while maintaining safety margins per Absolute Maximum Ratings.
How does the ISET pin configure peak current limiting on the LTC3630IMSE#TRPBF?
The LTC3630IMSE#TRPBF uses a 5µA internal current source on the ISET pin to generate a voltage across an external resistor to ground, which sets the peak inductor current threshold. With ISET floating, peak current is 1.2A typical; shorted to GND, it drops to 120mA typical. The relationship follows RISET = IPEAK × 0.2 × 10⁶, enabling precise tuning from 120mA to 1.2A for optimized efficiency and component sizing.
Can the LTC3630IMSE#TRPBF operate in 100% duty cycle mode, and what is its significance?
Yes, the LTC3630IMSE#TRPBF supports 100% duty cycle operation due to its P-channel high-side MOSFET, allowing continuous conduction when VIN approaches VOUT. This enables regulation during deep input brownouts - e.g., sustaining 3.3V output even as input drops to 3.5V - critical for battery-powered systems where dropout margin directly impacts runtime and system availability.
What is the function of the FBO pin on the LTC3630IMSE#TRPBF, and how is it used?
The FBO (Feedback Comparator Output) pin on the LTC3630IMSE#TRPBF is an open-drain output that mirrors the internal feedback comparator state. When used in master-slave configurations, the FBO of one LTC3630IMSE#TRPBF drives the VFB pins of others, forcing synchronized regulation and enabling current sharing across multiple units - allowing scalable output current beyond the 500mA limit of a single device without external controllers or current-sense circuitry.
Does the LTC3630IMSE#TRPBF require external compensation components?
No, the LTC3630IMSE#TRPBF is internally compensated and requires no external compensation components. Its hysteretic Burst Mode® control architecture eliminates the need for loop compensation networks, reducing BOM count, layout complexity, and design iteration time - a key advantage over voltage-mode or current-mode controllers that mandate careful RC network selection for stability.
LTC3630IMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck
- Output Type:
- Adjustable (Programmable)
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 0.8V (1.8V, 3.3V, 5V)
- Voltage - Output (Max):
- 65V
- Current - Output:
- 500mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630IMSE#TRPBF FAQ
1.How can I place an order for LTC3630IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630IMSE#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 LTC3630IMSE#TRPBF reliable?
The price and inventory of LTC3630IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630IMSE#TRPBF?
LTC3630IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630IMSE#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 LTC3630IMSE#TRPBF?
For technical support, including LTC3630IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630IMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3630IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630IMSE#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 LTC3630IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630IMSE#TRPBF?
All LTC3630IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630IMSE#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 LTC3630IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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