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Analog Devices Inc. LTC3630AMPMSE#TRPBF
- Part No.:
- LTC3630AMPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AMPMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
LTC3630AMPMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, wide-input synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs. It operates from 4V to 76V input, delivers up to 500mA output current, and maintains regulation with only 12µA quiescent current in Burst Mode® operation - ideal for battery-backed industrial sensors and avionics power rails requiring ultra-low standby power.
For engineers reviewing the LTC3630AMPMSE#TRPBF datasheet, LTC3630AMPMSE#TRPBF pinout, LTC3630AMPMSE#TRPBF application, or LTC3630AMPMSE#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, programmable peak current limit (100mA–1.2A), 0.8V ±1% feedback reference, 100% duty-cycle dropout capability, and FBO pin for current sharing across multiple units.
Technical Context
The LTC3630AMPMSE#TRPBF uses Burst Mode® control with hysteretic feedback to achieve high efficiency across 1µA–500mA load range. Its internal P/N-channel synchronous switches eliminate external diode losses, while the 0.8V feedback comparator and programmable ISET threshold enable precise output regulation and ripple optimization.
It features dual soft-start (internal 0.8ms + external SS pin), RUN pin with 1.21V rising threshold and 110mV hysteresis for UVLO, and FBO output that drives slave VFB pins to parallel converters - all implemented without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports direct connection to unregulated 24V/48V industrial buses and 72V avionics supplies. |
| Output Current | Up to 500mA average - limited by 1.2A typical peak current; adjustable down to 100mA via ISET resistor. |
| Quiescent Current | 12µA in Burst Mode - enables >1-year battery life in always-on remote monitoring nodes. |
| Feedback Reference | 0.8V ±1% - ensures ±1.25% output accuracy over temperature and line for precision analog rails. |
| Operating Temp Range | –55°C to 150°C - qualified for military-grade and downhole oilfield electronics. |
| Package Thermal Resistance | θJA = 45°C/W (MSOP) - requires minimal copper area for thermal management in compact enclosures. |
| Switch On-Resistance | Top: 1.0Ω, Bottom: 0.53Ω - minimizes conduction loss at full load, enabling >90% efficiency at 500mA. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16), 3mm × 4.9mm, 0.75mm height, exposed pad (Pin 17) tied to GND for thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch Node | Connects to inductor; carries pulsed current through internal P/N MOSFETs - requires low-inductance layout. |
| VIN (3) | Main Input Supply | Accepts 4V–76V; must be bypassed with ceramic capacitor close to pin to suppress switching noise. |
| RUN (5) | Enable/UVLO Control | 1.21V rising threshold enables operation; 0.7V falling forces shutdown - configurable as precision input monitor. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Set fixed 1.8V/3.3V/5V or adjustable mode by grounding both - eliminates external resistors for standard rails. |
| GND (8,14,16,17) | Ground Return | Multiple GND pins and exposed pad reduce ground impedance and improve thermal performance. |
| VFB (9) | Feedback Input | Compares divided output to 0.8V reference; connects directly to output for fixed modes or divider for adjustable. |
| SS (10) | Soft-Start Control | Capacitor to GND sets ramp time (1ms per 16.5nF); floating defaults to 0.8ms internal soft-start. |
| ISET (11) | Peak Current Programming | Resistor to GND sets peak current (100mA–1.2A); determines max output current and component sizing. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630As in higher-current designs. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P/N MOSFETs eliminate external diode, reducing BOM count and improving efficiency above 100mA. |
| Burst Mode® Operation | Maintains regulation at light loads with only 12µA IQ - critical for energy-harvesting and battery-powered systems. |
| Programmable Peak Current Limit | Adjustable 100mA–1.2A via single ISET resistor - optimizes inductor/capacitor size and light-load ripple trade-offs. |
| No External Compensation Required | Internal loop compensation enables stable operation with minimal external parts - reduces design cycle time. |
| 100% Duty-Cycle Dropout | P-channel high-side switch sustains output during deep brownouts - supports fail-safe operation in automotive start-stop. |
| Current Sharing via FBO Pin | Enables parallel configuration of multiple LTC3630As without master-slave clock synchronization. |
Applications
| Industrial Control Supplies | Avionics Power Distribution |
|---|---|
Use Scenario: Regulating 24V or 28V aircraft bus to 5V/3.3V for flight control sensors and data acquisition modules. IC Role / Device Role / Timing Role: Primary point-of-load regulator with extended temperature qualification and high-reliability packaging. Use Value: –55°C to 150°C rating ensures operation in cold-soak hangars and hot engine bays; 76V abs max VIN withstands load dump transients. |
Use Scenario: Powering radiation-tolerant microcontrollers and ADCs in satellite subsystems with strict power budget constraints. IC Role / Device Role / Timing Role: Ultra-low-IQ DC/DC converter enabling multi-year mission life on limited battery capacity. Use Value: 12µA quiescent current extends battery life beyond 3 years in dormant telemetry modes; FBO pin supports redundant power paths. |
| Medical Imaging Front-End | Downhole Oilfield Electronics |
Use Scenario: Generating clean, low-noise 1.8V/3.3V rails for high-resolution CT/MRI sensor signal chains. IC Role / Device Role / Timing Role: Low-ripple, low-EVM power source for precision analog front-ends and clock distribution ICs. Use Value: Programmable ISET and optional CISET capacitor reduce light-load output voltage ripple below 10mVpp - preserving SNR in sensitive ADCs. |
Use Scenario: Converting 48V–72V surface-supplied power to 5V for downhole pressure/temperature transducers operating at 150°C. IC Role / Device Role / Timing Role: High-temperature, high-input-voltage buck converter with proven reliability in harsh drilling environments. Use Value: MSE16 package with soldered exposed pad achieves 45°C/W θJA - enables thermal survival at junction temperatures up to 150°C without forced air. |
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 |
|---|---|---|---|
| LTC3630AIMSE#TRPBF | Same architecture but rated for –40°C to 125°C - lacks extended low-temp capability. | Not suitable for cold-environment deployments (e.g., arctic instrumentation, space launch). | Select when ambient temperature never falls below –40°C and cost sensitivity outweighs extended temp need. |
| LM5164QPWPRQ1 | 4.5V–65V input, 1A output, 100µA IQ - higher quiescent current, no FBO pin, AEC-Q100 qualified. | Automotive-focused; lacks extended temperature range and current-sharing capability. | Prefer for automotive production where AEC-Q100 compliance is mandatory and parallel operation is unnecessary. |
Compared with LTC3630AIMSE#TRPBF and LM5164QPWPRQ1, the LTC3630AMPMSE#TRPBF uniquely combines –55°C startup, 12µA IQ, and FBO-based current sharing - making it the only option for high-reliability, ultra-low-power, multi-unit parallel designs in extreme environments.
Availability
LTC3630AMPMSE#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power distribution, medical imaging front-end, and downhole oilfield electronics requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC3630AMPMSE#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 technical and manufacturing continuity for the LTC portfolio. Linear's legacy expertise in precision power management remains core to ADI's high-performance analog roadmap.
The LTC3630A family was designed specifically for high-input-voltage, low-quiescent-current applications in aerospace, defense, and industrial systems - emphasizing robustness, extended temperature operation, and minimal external component count.
FAQ
What is the operating temperature range of the LTC3630AMPMSE#TRPBF?
The LTC3630AMPMSE#TRPBF is specified for operation from –55°C to 150°C junction temperature. This extended range is validated per MIL-STD-883 methods and supports deployment in downhole tools, military avionics, and polar instrumentation where standard commercial or industrial grades fail. The MSE16 package's exposed pad must be soldered to PCB ground for thermal compliance.
How does the FBO pin enable current sharing between multiple LTC3630AMPMSE#TRPBF units?
The FBO pin on the LTC3630AMPMSE#TRPBF is an open-drain feedback comparator output (20µA pull-up, 70Ω pull-down). When connected to the VFB pins of slave LTC3630AMPMSE#TRPBF units, it forces all devices to regulate to the same output voltage, enabling true current sharing without external clock synchronization or complex control logic.
Can the LTC3630AMPMSE#TRPBF operate with input voltages above 65V?
Yes - the LTC3630AMPMSE#TRPBF supports up to 76V continuous input and 80V absolute maximum. However, when VIN – VOUT exceeds 65V, a minimum 5mA output load is required to maintain regulation under all conditions, including shutdown. Without this load, the regulated output voltage is limited to VIN – 65V.
What is the purpose of the ISET pin on the LTC3630AMPMSE#TRPBF?
The ISET pin on the LTC3630AMPMSE#TRPBF programs the peak inductor current limit from 100mA to 1.2A using a resistor to GND. Since maximum average output current equals half the peak current, this pin directly sets the 500mA capability and allows optimization of inductor/capacitor size and light-load ripple. In sleep mode, its current source reduces to 1µA to preserve efficiency.
Does the LTC3630AMPMSE#TRPBF require external compensation components?
No - the LTC3630AMPMSE#TRPBF uses internal compensation and operates stably with only input/output capacitors and an inductor. Its Burst Mode® architecture and fixed-frequency-free control eliminate the need for external RC networks or loop compensation components, reducing bill-of-materials count and simplifying layout for space-constrained applications.
LTC3630AMPMSE#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630AMPMSE#TRPBF FAQ
1.How can I place an order for LTC3630AMPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AMPMSE#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 LTC3630AMPMSE#TRPBF reliable?
The price and inventory of LTC3630AMPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AMPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AMPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AMPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AMPMSE#TRPBF?
LTC3630AMPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AMPMSE#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 LTC3630AMPMSE#TRPBF?
For technical support, including LTC3630AMPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AMPMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3630AMPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AMPMSE#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 LTC3630AMPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AMPMSE#TRPBF?
All LTC3630AMPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AMPMSE#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 LTC3630AMPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630AMPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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