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Analog Devices Inc. LTC3630AMPMSE#PBF
- Part No.:
- LTC3630AMPMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AMPMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:222
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Product details
Overview
LTC3630AMPMSE#PBF 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, maintains regulation down to 0.8V output, and draws only 12µA quiescent current in Burst Mode® at no load - enabling long battery life in industrial sensors and avionics power rails.
For engineers reviewing the LTC3630AMPMSE#PBF datasheet, LTC3630AMPMSE#PBF pinout, LTC3630AMPMSE#PBF application, or LTC3630AMPMSE#PBF equivalent, key selection criteria include its –55°C to 150°C extended temperature rating, programmable peak current limit (100mA–1.2A), 0.8V ±1% feedback reference, internal soft-start, and FBO-enabled parallel operation for higher current scalability.
Technical Context
The LTC3630AMPMSE#PBF implements a hysteretic Burst Mode® control architecture with internal power switches, eliminating external compensation and enabling stable operation across 4V–76V input while maintaining sub-12µA no-load supply current. Its feedback comparator monitors VFB against a precise 0.8V reference, and its RUN pin provides programmable UVLO with 110mV hysteresis.
Peak inductor current is set via ISET pin voltage (0.1V–1.0V), sourced by a 5µA (active) / 1µA (sleep) current source, directly determining maximum average output current (IOUT = 0.5 × IPEAK). The FBO pin enables master-slave paralleling by driving slave VFB pins, supporting >500mA combined loads without external current-sharing circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports direct regulation from 24V, 48V, and 72V industrial/avionic bus rails 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 Burst Mode® - enables multi-year battery operation in always-on remote sensors. |
| Feedback Reference | 0.8V ±1% - enables precise adjustable outputs from 0.8V to VIN; fixed 1.8V/3.3V/5V options via VPRG pins. |
| Operating Temp Range | –55°C to 150°C - qualified for military, aerospace, and under-hood automotive applications per MP grade. |
| Package Thermal Resistance | θJA = 45°C/W (MSOP) - requires exposed pad soldering to PCB ground plane for thermal reliability at full load. |
| Switch On-Resistance | Top switch: 1.00Ω, bottom switch: 0.53Ω - limits conduction loss at 500mA; impacts dropout and efficiency above 10V input. |
Pinout & Package
The LTC3630AMPMSE#PBF is housed in a 16-lead plastic MSOP package (MSE16) with an exposed thermal pad (Pin 17) that must be soldered to PCB ground for thermal performance. Pin count, layout, and thermal metrics match the standard MSE16 footprint defined in Linear Technology's packaging specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch Node | Connection point between internal high-side and low-side MOSFETs; ties to inductor; high dv/dt node requiring tight layout. |
| VIN (3) | Main Input Supply | Primary power input (4V–76V); requires local 10µF ceramic bypass capacitor to GND for stability. |
| RUN (5) | Enable/UVLO Control | Logic-level enable with 1.21V rising threshold; resistor divider from VIN sets precise input undervoltage lockout. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Configure fixed 1.8V/3.3V/5V or adjustable mode; both grounded for external resistor divider. |
| GND (8,14,16,17) | Ground Return | Four ground connections including exposed pad (Pin 17); all must connect to low-impedance PCB ground plane. |
| VFB (9) | Feedback Input | Monitors output via resistive divider; compared to 0.8V reference; connects directly to VOUT for fixed-output configs. |
| SS (10) | Soft-Start Control | Capacitor-to-GND sets output 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 limit (100mA–1.2A); open = max, shorted = min; determines max IOUT. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) used to drive VFB of slave converters for current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated high-side P-MOSFET and low-side N-MOSFET eliminate external diode, enabling >90% efficiency at medium loads and 100% duty-cycle dropout operation. |
| Burst Mode® Operation | Reduces no-load IQ to 12µA by disabling switching during light loads and activating short energy bursts only as needed to maintain regulation. |
| Programmable Peak Current Limit | Adjustable 100mA–1.2A via ISET pin resistor allows optimization of inductor size, output ripple, and efficiency across load range. |
| Multiple Fixed Output Options | 1.8V/3.3V/5V selectable via VPRG1/VPRG2 logic states - eliminates external feedback resistors and improves noise immunity vs. adjustable mode. |
| Master-Slave Paralleling Support | FBO pin drives slave VFB inputs to synchronize regulation and share load current across multiple LTC3630A units without external controllers. |
Applications
| Industrial Control Supplies | Avionics Power Rails |
|---|---|
Use Scenario: Regulating 24V or 48V aircraft bus to 5V/3.3V for flight data recorders and sensor interface modules. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering clean, low-noise power with extended temperature operation. Use Value: –55°C to 150°C rating ensures reliable startup and operation in unheated cargo bays and engine-mounted electronics. | Use Scenario: Powering analog front-ends and microcontrollers in inertial measurement units (IMUs) with strict EMI and efficiency requirements. IC Role / Device Role / Timing Role: High-efficiency, low-IQ DC/DC converter supplying regulated 3.3V from variable 28V aircraft bus. Use Value: 12µA Burst Mode® quiescent current extends battery backup runtime during main power loss events. |
| Medical Diagnostic Equipment | Automotive ADAS Sensors |
Use Scenario: Generating isolated auxiliary supplies for ultrasound transducer bias and ADC reference circuits in portable imaging devices. IC Role / Device Role / Timing Role: Compact, thermally robust step-down converter powering precision analog subsystems from 12V or 24V battery rails. Use Value: 0.8V ±1% feedback reference and low output ripple support <12-bit ADC accuracy without additional LDO post-regulation. | Use Scenario: Supplying 5V to radar MMICs and 1.8V to FPGA configuration logic in forward-facing collision avoidance systems. IC Role / Device Role / Timing Role: Dual-output-capable buck controller meeting AEC-Q200 stress requirements via MP-grade qualification. Use Value: Programmable peak current and FBO paralleling allow scalable design across 77GHz radar variants with varying power demands. |
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#PBF | Same architecture and pinout, but rated for –40°C to 125°C instead of –55°C to 150°C; lower θJA not specified. | Not suitable for cold-soak or high-ambient under-hood deployments; lacks MIL-STD-883 screening. | Select LTC3630AMPMSE#PBF when operating below –40°C or above 125°C ambient is required. |
| LTC3630AEDHC#PBF | Identical electrical specs but in 5mm × 3mm DFN package (θJA = 43°C/W); exposed pad also GND-connected. | Offers better thermal performance in space-constrained layouts; less creepage distance than MSOP at high VIN. | Choose LTC3630AEDHC#PBF for compact PCBs where thermal resistance <45°C/W is critical and high-voltage clearance is managed externally. |
Compared with LTC3630AIMSE#PBF and LTC3630AEDHC#PBF, the LTC3630AMPMSE#PBF uniquely combines military-grade temperature range (–55°C to 150°C) with MSOP package creepage compliance for high-VIN industrial and avionics use - making it the only option qualified for extreme cold-start and sustained high-temperature operation without derating.
Availability
LTC3630AMPMSE#PBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power rails, medical diagnostic equipment, automotive ADAS sensors, and ruggedized portable instrumentation requiring stable component supply across extended temperature and high-reliability environments.
Supply support for LTC3630AMPMSE#PBF 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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC3630A product line delivers high-efficiency, wide-input synchronous buck regulators for harsh-environment applications - designed specifically for industrial, aerospace, medical, and automotive systems demanding extended temperature operation, low quiescent current, and robust input voltage tolerance.
FAQ
What is the operating temperature range of the LTC3630AMPMSE#PBF?
The LTC3630AMPMSE#PBF is specified for operation from –55°C to 150°C junction temperature, qualifying it for military, aerospace, and under-hood automotive applications. This MP-grade rating exceeds commercial (E) and industrial (I) variants, and requires proper thermal design using the exposed pad soldered to PCB ground to maintain reliability at maximum ambient temperatures.
How does the ISET pin configure peak current limit on the LTC3630AMPMSE#PBF?
The ISET pin on the LTC3630AMPMSE#PBF sources a 5µA (active) or 1µA (sleep) current; connecting a resistor RISET from ISET to GND sets the peak current threshold per RISET = IPEAK × 0.2 × 10⁶. Open ISET yields ~1.2A peak (500mA avg), shorted yields ~0.12A peak (60mA avg), and values in between scale linearly - enabling optimization of inductor size and light-load efficiency.
Can multiple LTC3630AMPMSE#PBF units be paralleled for higher output current?
Yes - the LTC3630AMPMSE#PBF includes an FBO (Feedback Comparator Output) pin that can drive the VFB pins of other LTC3630A units configured as slaves. This master-slave arrangement synchronizes regulation and shares load current without external current-sense or control circuitry, supporting >500mA total output while preserving individual device protection features.
What is the minimum output voltage supported by the LTC3630AMPMSE#PBF?
The LTC3630AMPMSE#PBF supports output voltages from 0.8V up to VIN. In adjustable mode, the 0.8V ±1% internal reference enables precise regulation down to 0.8V. For fixed outputs, it supports 1.8V, 3.3V, and 5V via VPRG1/VPRG2 pin strapping - all guaranteed over the full –55°C to 150°C temperature range.
Does the LTC3630AMPMSE#PBF require external compensation components?
No - the LTC3630AMPMSE#PBF uses a hysteretic Burst Mode® control architecture with internal compensation, eliminating the need for external loop-compensation components such as capacitors or resistors. This simplifies design, reduces BOM count, and improves reliability across temperature and load variations without tuning.
LTC3630AMPMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC3630AMPMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AMPMSE#PBF 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#PBF reliable?
The price and inventory of LTC3630AMPMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AMPMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3630AMPMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AMPMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AMPMSE#PBF?
LTC3630AMPMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AMPMSE#PBF 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#PBF?
For technical support, including LTC3630AMPMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AMPMSE#PBF requirements.
6.How does Aetrix verify that LTC3630AMPMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AMPMSE#PBF 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#PBF meets industry standards.
7.What is the process for return or replacement of LTC3630AMPMSE#PBF?
All LTC3630AMPMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AMPMSE#PBF, 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#PBF part is unused and in its original packaging.
Return procedure for LTC3630AMPMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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