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Analog Devices Inc. LTC3630MPMSE#TRPBF
- Part No.:
- LTC3630MPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630MPMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,806
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Product details
Overview
LTC3630MPMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–65V 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 delivers regulated output from 0.8V to VIN in industrial avionics power supplies requiring wide-input, ultra-low-IQ, and extended temperature operation.
For engineers reviewing the LTC3630MPMSE#TRPBF datasheet, LTC3630MPMSE#TRPBF pinout, LTC3630MPMSE#TRPBF application, or LTC3630MPMSE#TRPBF equivalent, this page provides verified package mapping (16-lead MSOP, –55°C to 150°C), confirmed pin functions (SW, RUN, VPRG1/2, FBO, ISET), real-world efficiency curves (≥85% at 100mA–500mA), and validated alternatives for high-reliability power conversion design.
Technical Context
The LTC3630MPMSE#TRPBF employs Burst Mode® control with hysteretic feedback to maintain regulation across load currents from 1mA to 500mA while drawing only 12µA in sleep mode. Its internal 0.8V ±1% reference and precision RUN comparator (1.21V rising threshold, 110mV hysteresis) enable robust start-up control under varying input conditions.
Peak inductor current is set via external resistor on ISET (5µA current source), directly determining maximum output current (IOUT(MAX) = 0.5 × IPEAK). The FBO pin supports master-slave paralleling for >500mA applications, and the 100% duty-cycle dropout capability allows operation down to VIN ≈ VOUT with P-channel top switch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports 24V/48V industrial rails, automotive battery transients, and avionics 28V systems without pre-regulation. |
| Output Current | Up to 500mA - determined by 100mA–1.2A programmable peak current limit; average output = 50% of peak. |
| Quiescent Current | 12µA typical in sleep mode - enables multi-year battery life in always-on remote sensors and avionics standby circuits. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation from 0.8V to VIN using external divider or fixed 1.8V/3.3V/5V via VPRG pins. |
| Operating Temp Range | –55°C to +150°C - qualified for extended-temperature military, aerospace, and downhole industrial use. |
| Package | 16-lead MSOP (MSE16) with exposed pad - θJA = 45°C/W; requires soldered GND pad for thermal reliability at full load. |
| Switching Architecture | Synchronous Buck with P/N-channel MOSFETs - eliminates external diode, improves light-load efficiency, enables 100% duty cycle. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16), 3mm × 4.9mm × 1.1mm, exposed thermal pad (Pin 17 = GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connects to inductor; carries pulsed current through internal high-side P-MOSFET and low-side N-MOSFET. |
| VIN (3) | Main input supply | Accepts 4V–65V; requires local ceramic bypass capacitor to GND for stability and EMI reduction. |
| RUN (5) | Enable/control input | 1.21V rising threshold enables operation; <0.7V forces 5µA shutdown; internal 2MΩ pull-up and 2µA current source. |
| VPRG1 (6), VPRG2 (7) | Output voltage selection | Configure fixed 1.8V/3.3V/5V or adjustable mode by grounding or connecting to SS pin per datasheet table. |
| 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 performance. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; connects directly to VOUT for fixed outputs or to resistive 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 IPEAK (100mA–1.2A); 5µA current source enables precise, temperature-stable current limiting. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630s in higher-current designs. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Maintains ≥85% efficiency from 1mA to full 500mA load while drawing only 12µA at no load. |
| Programmable peak current limit | Adjustable 100mA–1.2A via single resistor on ISET pin - optimizes inductor/capacitor size and light-load ripple. |
| Fixed-output configuration | 1.8V/3.3V/5V selectable via VPRG1/VPRG2 pins - eliminates external feedback resistors and noise-sensitive nodes. |
| 100% duty-cycle dropout | P-channel high-side switch enables regulation down to VIN = VOUT - critical for brownout resilience in battery-powered avionics. |
| Master-slave paralleling | FBO pin enables synchronized current sharing across multiple LTC3630MPMSE#TRPBF units - scales output beyond 500mA without external controllers. |
Applications
| Avionics Power Supply | Industrial Sensor Node |
|---|---|
Use Scenario: Regulating 28V aircraft bus to 3.3V for flight data recorder logic and memory. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 350mA continuous, with Burst Mode enabling <15µA standby draw during cruise. Use Value: –55°C to +150°C rating ensures operation across cabin-to-external temperature extremes; 65V abs max withstands load dump transients. |
Use Scenario: Powering wireless vibration sensor on rotating machinery with 10-year lithium-thionyl chloride battery life. IC Role / Device Role / Timing Role: Always-on DC/DC converter maintaining 1.8V rail for microcontroller and RF transceiver during 99.9% sleep duty cycle. Use Value: 12µA quiescent current extends battery life beyond 10 years; programmable ISET minimizes output capacitor size for compact PCB layout. |
| Downhole Oilfield Instrumentation | Ruggedized Medical Diagnostic Module |
Use Scenario: Converting 48V distributed power to 5V for high-precision ADC and isolation amplifier in borehole telemetry tool. IC Role / Device Role / Timing Role: High-input-voltage step-down regulator operating continuously at +150°C ambient with forced-air cooling. Use Value: MSE16 package with soldered exposed pad achieves <45°C/W θJA; 65V input range accommodates long-cable voltage drop and surges. |
Use Scenario: Providing isolated 5V and 3.3V rails for portable ultrasound front-end ASIC and ARM Cortex-M7 processor. IC Role / Device Role / Timing Role: Dual-rail power source configured via VPRG pins for fixed 5V and adjustable 3.3V outputs with independent soft-start. Use Value: No external compensation required simplifies FDA-cleared design; 0.8V reference enables tight tolerance on critical analog supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8609SIV#TRPBF | 42V max input, 2.5A output, 2.5µA IQ, Silent Switcher® architecture; smaller 3mm × 4mm LQFN package. | Better EMI performance and higher current, but narrower input range and lower temp grade (–40°C to 125°C). | Select when EMI compliance is critical and input stays ≤42V; not suitable for 65V avionics or –55°C environments. |
| TPS54360BQPWPRQ1 | 60V max input, 3.5A output, 14µA IQ, integrated compensation; AEC-Q100 qualified, SOIC-8 package. | Automotive-qualified with wider temp range (–40°C to 150°C), but lacks programmable peak current and FBO paralleling. | Prefer for automotive under-hood use where AEC-Q100 is mandatory; avoid when master-slave scaling or fine IPEAK tuning is needed. |
Compared with LT8609SIV#TRPBF and TPS54360BQPWPRQ1, the LTC3630MPMSE#TRPBF uniquely combines 65V input, –55°C operation, programmable peak current, and FBO-based paralleling-making it irreplaceable for extended-temperature avionics and oilfield applications where those four attributes are simultaneously required.
Availability
LTC3630MPMSE#TRPBF is available at Aetrix Electronics and suitable for avionics power supplies, downhole instrumentation, ruggedized medical diagnostics, and industrial sensor nodes requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC3630MPMSE#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 high-performance power management portfolio with rigorous military- and aerospace-grade qualification processes.
The LTC3630MPMSE#TRPBF belongs to Linear's high-voltage synchronous buck converter family, designed specifically for harsh-environment applications demanding ultra-low quiescent current, wide input range, and extended temperature operation without external complexity.
FAQ
What is the guaranteed operating temperature range for the LTC3630MPMSE#TRPBF?
The LTC3630MPMSE#TRPBF is tested and guaranteed over –55°C to +150°C junction temperature. This extended range is validated per Linear Technology's MP (Military Plastic) qualification standard and includes full electrical characterization across the entire span, unlike commercial or industrial grades. The MSE16 package's exposed pad must be soldered to PCB ground for thermal integrity at high ambient temperatures.
How does the ISET pin on the LTC3630MPMSE#TRPBF set output current capability?
The ISET pin on the LTC3630MPMSE#TRPBF sources a precise 5µA current (reduced to 1µA in sleep mode) that develops a voltage across an external resistor to ground. This voltage directly programs the peak inductor current comparator threshold from 100mA to 1.2A. Since the LTC3630MPMSE#TRPBF uses synchronous buck architecture with inherent current halving, the maximum continuous output current equals half the programmed peak current.
Can the LTC3630MPMSE#TRPBF be used in parallel to increase output current, and how is it implemented?
Yes, the LTC3630MPMSE#TRPBF supports current sharing via its FBO (Feedback Comparator Output) pin. Connect the FBO of one "master" LTC3630MPMSE#TRPBF to the VFB pins of one or more "slave" LTC3630MPMSE#TRPBF units. The master's FBO pulls down the slaves' feedback nodes to force equal output voltage regulation, enabling scalable current delivery beyond 500mA without external current-sense circuitry or timing synchronization.
What is the purpose of the VPRG1 and VPRG2 pins on the LTC3630MPMSE#TRPBF, and how do they affect design?
The VPRG1 and VPRG2 pins on the LTC3630MPMSE#TRPBF select fixed output voltages (1.8V, 3.3V, or 5V) by connecting them to GND or SS, eliminating external feedback resistors and associated noise sensitivity. In adjustable mode (both pins grounded), the device uses the internal 0.8V reference with an external resistor divider. This dual-mode flexibility reduces BOM count for standard rails while preserving precision for custom outputs.
Does the LTC3630MPMSE#TRPBF require external compensation components?
No, the LTC3630MPMSE#TRPBF uses a proprietary hysteretic Burst Mode® control architecture with internal compensation. It operates stably with only input and output capacitors plus an inductor - no external RC networks, type-II or type-III compensators, or loop stability analysis are required. This simplifies design, reduces footprint, and improves reliability in high-vibration or high-temperature deployments where passive component drift matters.
LTC3630MPMSE#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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630MPMSE#TRPBF FAQ
1.How can I place an order for LTC3630MPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630MPMSE#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 LTC3630MPMSE#TRPBF reliable?
The price and inventory of LTC3630MPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630MPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630MPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630MPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630MPMSE#TRPBF?
LTC3630MPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630MPMSE#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 LTC3630MPMSE#TRPBF?
For technical support, including LTC3630MPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630MPMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3630MPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630MPMSE#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 LTC3630MPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630MPMSE#TRPBF?
All LTC3630MPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630MPMSE#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 LTC3630MPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630MPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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