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Analog Devices Inc. LTC3630AIMSE#TRPBF
- Part No.:
- LTC3630AIMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AIMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,924
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Product details
Overview
LTC3630AIMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–76V input, 500mA synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs, 12µA no-load quiescent current, and programmable peak current limit (100mA–1.2A). It operates in Burst Mode® for ultra-low standby power and supports adjustable or fixed 1.8V/3.3V/5V outputs - ideal for industrial control supplies and automotive subsystems requiring wide VIN tolerance and thermal robustness.
For engineers reviewing the LTC3630AIMSE#TRPBF datasheet, LTC3630AIMSE#TRPBF pinout, LTC3630AIMSE#TRPBF application, or LTC3630AIMSE#TRPBF equivalent, key selection criteria include its 76V max input rating, 0.8V ±1% feedback reference, 100% duty-cycle dropout capability, MSE16 package thermal performance (θJA = 45°C/W), and FBO-enabled current paralleling for >500mA loads.
Technical Context
The LTC3630AIMSE#TRPBF employs Burst Mode® control with hysteretic feedback to maintain regulation at light loads while drawing only 12µA supply current. Its internal P-channel high-side and N-channel low-side switches eliminate external gate drivers and enable 100% duty-cycle operation for low-dropout regulation.
Peak inductor current is set via resistor-to-ground on ISET (5µA current source), directly determining maximum average output current (IOUT_MAX = 0.5 × IPEAK). The FBO pin provides open-drain feedback comparator output to synchronize multiple converters for higher-current applications without external current-sharing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports unregulated industrial rails, automotive battery transients, and PoE-derived supplies. |
| Max Output Current | 500mA - determined by 1.2A typical peak current limit and synchronous architecture. |
| Quiescent Current | 12µA typical in Burst Mode - enables multi-year battery life in always-on sensor nodes. |
| Feedback Reference | 0.8V ±1% - enables precise output regulation down to 0.8V with external resistor divider. |
| Package | MSE16 (16-lead MSOP, 3mm × 4.9mm) with exposed pad - θJA = 45°C/W, requires GND-soldered thermal pad. |
| Operating Temp | –40°C to +125°C junction - qualified for industrial and under-hood automotive environments. |
| Switch On-Resistance | Top: 1.0Ω, Bottom: 0.53Ω - limits conduction loss at full load and defines thermal headroom. |
Pinout & Package
MSE16 package: 16-lead plastic MSOP with exposed thermal pad (Pin 17 = GND), 0.75mm profile, RoHS-compliant matte tin finish. Requires soldering of exposed pad to PCB ground plane for thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connects to inductor; carries pulsed current through internal high-side and low-side MOSFETs. |
| VIN (3) | Main input supply | Accepts 4V–76V; requires local ceramic bypass capacitor to GND for stability. |
| RUN (5) | Enable/control input | 1.21V threshold enables operation; <0.7V forces 5µA shutdown; supports UVLO via resistor divider. |
| VPRG1/VPRG2 (6,7) | Output voltage select | Configure fixed 1.8V/3.3V/5V or adjustable mode by grounding or tying to SS. |
| GND (8,14,16,17) | Ground reference | Multiple GND pins + exposed pad (Pin 17) - mandatory for thermal and EMI performance. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; direct connection for fixed outputs. |
| SS (10) | Soft-start control | Capacitor-to-GND sets ramp time (1ms per 16.5nF); internal default = 0.8ms. |
| ISET (11) | Peak current programming | Resistor-to-GND sets IPEAK (100mA–1.2A); determines max output current and ripple trade-off. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630As. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Reduces no-load IQ to 12µA while maintaining regulation - critical for energy-harvesting and battery-backed systems. |
| Integrated power switches | Eliminates external MOSFETs and gate drivers; P/N-channel pair enables 100% duty cycle for ultra-low dropout. |
| Programmable peak current | Adjustable 100mA–1.2A via ISET resistor - optimizes inductor/capacitor size and light-load efficiency. |
| Fixed-output flexibility | 1.8V/3.3V/5V selectable via VPRG pins - removes external resistors and noise-sensitive feedback path. |
| Current paralleling support | FBO pin enables master-slave configuration of multiple LTC3630As - scales output current beyond 500mA without external controllers. |
Applications
| Industrial Control Supplies | Automotive Subsystems |
|---|---|
Use Scenario: Powering PLC I/O modules, field transmitters, and isolated sensor interfaces from 24V or 48V DC rails with transient immunity. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 5V or 3.3V to microcontrollers and analog front-ends. Use Value: 76V absolute max input withstands 100V load-dump transients; 125°C operation survives cabinet ambient extremes. |
Use Scenario: Supplying infotainment displays, ADAS camera modules, and body control units from 12V battery with cold-crank resilience. IC Role / Device Role / Timing Role: High-VIN buck converter enabling direct battery connection without pre-regulator stage. Use Value: 4V min input sustains operation during 6V cold-crank; Burst Mode extends backup battery runtime in sleep states. |
| Medical Portable Devices | Avionics Power Interfaces |
Use Scenario: Power management in handheld ultrasound, patient monitors, and infusion pumps requiring low-noise, long-life battery operation. IC Role / Device Role / Timing Role: Efficient step-down regulator converting Li-ion pack (8.4V–12.6V) to 3.3V system rail. Use Value: 12µA quiescent current extends single-charge operating time; adjustable output supports diverse SoC requirements. |
Use Scenario: Converting 28V aircraft bus to 5V/3.3V for flight data recorders, communication radios, and navigation sensors. IC Role / Device Role / Timing Role: Robust primary DC/DC stage tolerant of 100V surges and –55°C to +125°C extended temperature operation. Use Value: MSE16 package meets MIL-STD-704 surge immunity; 150°C max junction rating supports high-density avionics cooling constraints. |
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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 300mA, 1.5MHz fixed-frequency, no integrated low-side switch - requires external diode or MOSFET. | Lower max input (65V vs 76V), lower current, higher switching frequency - better for compact layouts but less suited for high-voltage transients. | Select when board space is constrained and 65V input suffices; avoid where 76V operation or 500mA+ is required. |
| MAX20004AATP+ | 3.5V–65V input, 600mA, 2.2MHz, integrated high/low-side FETs, 28µA IQ - no Burst Mode, uses forced PWM. | Higher quiescent current, fixed frequency, no programmable peak current - less efficient at ultra-light loads but more EMI-predictable. | Select for noise-sensitive applications needing deterministic switching; avoid where <15µA IQ or wide-load-efficiency optimization is critical. |
Compared with LM5164QPWPRQ1 and MAX20004AATP+, the LTC3630AIMSE#TRPBF delivers superior high-input-voltage resilience (76V), lowest no-load IQ (12µA), and flexible peak-current programming - making it optimal for industrial and automotive systems demanding both transient robustness and battery longevity.
Availability
LTC3630AIMSE#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, automotive subsystems, and medical portable devices requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for LTC3630AIMSE#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 full product support, documentation, and manufacturing continuity for the LTC portfolio.
The LTC3630A belongs to Linear's high-voltage monolithic buck converter family, designed specifically for industrial, automotive, and avionics applications where wide input range, low quiescent current, and thermal robustness are essential.
FAQ
What is the maximum input voltage rating for the LTC3630AIMSE#TRPBF?
The LTC3630AIMSE#TRPBF has a maximum operating input voltage of 76V and an absolute maximum rating of 80V. This allows reliable operation across harsh industrial and automotive environments, including 24V/48V systems with load-dump transients. Operation above 76V is not guaranteed and may trigger overvoltage protection or damage the device.
Does the LTC3630AIMSE#TRPBF support adjustable output voltage?
Yes, the LTC3630AIMSE#TRPBF supports adjustable output voltage from 0.8V to VIN by grounding both VPRG1 and VPRG2 pins and using an external resistor divider from VOUT to GND connected to the VFB pin. The internal 0.8V ±1% reference ensures precision regulation across temperature and line variations.
How is peak output current programmed on the LTC3630AIMSE#TRPBF?
Peak output current on the LTC3630AIMSE#TRPBF is programmed via a resistor (RISET) from the ISET pin to GND. A 5µA internal current source develops a voltage across RISET that sets the peak current comparator threshold. For example, a 100kΩ resistor yields ~500mA peak current (250mA average), while floating ISET gives 1.2A peak (600mA average).
Can multiple LTC3630AIMSE#TRPBF ICs be paralleled for higher current?
Yes, the LTC3630AIMSE#TRPBF includes an FBO (Feedback Comparator Output) pin that enables current paralleling. Connect the FBO of a master LTC3630AIMSE#TRPBF to the VFB pins of slave devices to synchronize regulation and share load current - supporting scalable designs beyond the 500mA per-unit limit.
What thermal considerations apply to the LTC3630AIMSE#TRPBF in MSE16 package?
The LTC3630AIMSE#TRPBF in MSE16 package has θJA = 45°C/W and requires soldering of the exposed thermal pad (Pin 17) to a PCB ground plane. At 500mA output and 24V input, power dissipation is ~0.5W; with 25°C ambient, junction temperature rises ~22.5°C above ambient - well within the –40°C to +125°C operating range when layout guidelines are followed.
LTC3630AIMSE#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):
- 76V
- Voltage - Output (Min/Fixed):
- 0.8V (1.8V, 3.3V, 5V)
- Voltage - Output (Max):
- 76V
- 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
LTC3630AIMSE#TRPBF FAQ
1.How can I place an order for LTC3630AIMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AIMSE#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 LTC3630AIMSE#TRPBF reliable?
The price and inventory of LTC3630AIMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AIMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AIMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AIMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AIMSE#TRPBF?
LTC3630AIMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AIMSE#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 LTC3630AIMSE#TRPBF?
For technical support, including LTC3630AIMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AIMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3630AIMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AIMSE#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 LTC3630AIMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AIMSE#TRPBF?
All LTC3630AIMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AIMSE#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 LTC3630AIMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630AIMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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