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Analog Devices Inc. LTC3630MPMSE#PBF
- Part No.:
- LTC3630MPMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630MPMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:306
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Product details
Overview
LTC3630MPMSE#PBF 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 quiescent current in Burst Mode®, and programmable peak current limit (100mA–1.2A). It delivers regulated output from 0.8V to VIN in adjustable or factory-fixed 1.8V/3.3V/5V configurations and is qualified for harsh environments including aerospace and extended-temperature industrial systems.
For engineers reviewing the LTC3630MPMSE#PBF datasheet, LTC3630MPMSE#PBF pinout, LTC3630MPMSE#PBF application, or LTC3630MPMSE#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed thermal performance at –55°C to 150°C junction, exact package mapping to 16-lead MSOP with exposed pad (Pin 17 = GND), and two rigorously cross-checked alternative parts for wide-input-voltage buck conversion.
Technical Context
The LTC3630MPMSE#PBF employs Burst Mode® control with hysteretic feedback to achieve ultra-low 12µA no-load supply current while maintaining regulation. Its internal power stage integrates a 1.0Ω high-side P-MOSFET and 0.53Ω low-side N-MOSFET, enabling 100% duty-cycle dropout operation down to VIN ≈ VOUT.
Startup is controlled via a precise RUN pin comparator (1.21V rising threshold, 110mV hysteresis), and output voltage is selected via VPRG1/VPRG2 logic states-supporting fixed 1.8V/3.3V/5V or adjustable mode with 0.800V ±1% reference. Peak current is set by ISET pin voltage (5µA source), directly scaling maximum output current (IOUT_MAX = 0.5 × IPEAK).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports direct regulation from 12V/24V/48V industrial buses, automotive batteries, and PoE-derived supplies. |
| Max Output Current | 500mA - determined by 1.2A typical peak current limit; scalable down to 100mA via ISET resistor for low-power applications. |
| Quiescent Current | 12µA in Burst Mode® - enables multi-year battery life in always-on remote sensors or backup power systems. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation across temperature; used with external divider for adjustable outputs. |
| Operating Temp Range | –55°C to +150°C junction - qualified for MIL-PRF-38535 Class H and extended-temperature avionics, downhole, and military systems. |
| Package Thermal Resistance | θJA = 45°C/W (MSOP) - requires exposed pad soldered to PCB ground plane for reliable operation at full load in high-ambient environments. |
| Switch On-Resistance | Top: 1.00Ω, Bottom: 0.53Ω - defines conduction loss and thermal rise under 500mA load; impacts efficiency above 100mA. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16) with thermally enhanced exposed pad (Pin 17 = GND). Dimensions: 4.0mm × 3.0mm × 0.85mm. Exposed pad must be soldered to PCB ground plane per datasheet requirement.
| 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 di/dt switching current. |
| VIN (3) | Main Input Supply | Primary power input (4V–65V); requires local ceramic bypass capacitor to GND for stability and EMI suppression. |
| RUN (5) | Enable/UVLO Control | Logic-controlled start-up: >1.21V enables operation; <0.7V forces 5µA shutdown; internal 2MΩ pull-up enables resistor-divider UVLO setup. |
| VPRG1 / VPRG2 (6,7) | Output Voltage Selection | Two-pin binary encoding selects 1.8V/3.3V/5V fixed output or adjustable mode (both grounded); eliminates external resistors for standard rails. |
| GND (8,14,16,17) | Ground Reference | Four ground connections including exposed thermal pad (Pin 17); all must connect to low-impedance PCB ground plane for thermal and noise performance. |
| VFB (9) | Feedback Input | Compares divided output voltage against 0.800V reference; in fixed-output mode, tied directly to VOUT. |
| SS (10) | Soft-Start Timing | 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 | Resistor-to-GND sets peak inductor current (100mA–1.2A); determines max output current and influences component size/ripple trade-offs. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) enables paralleling multiple LTC3630MPMSE#PBF for >500mA total current. |
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; reduces BOM count, layout area, and design risk for 500mA buck conversion. |
| Programmable Peak Current Limit | Adjusts IPEAK from 100mA to 1.2A via single ISET resistor - enables optimization of inductor/capacitor size and light-load ripple. |
| Precision RUN Pin Threshold | 1.21V rising threshold with 110mV hysteresis - allows accurate, repeatable input UVLO setting without external comparators. |
| 100% Duty-Cycle Dropout | Enables regulation down to VIN ≈ VOUT using P-channel high-side switch - essential for brownout resilience in automotive and industrial 12V systems. |
| MIL-PRF-38535 Qualified Variant | LTC3630MP grade tested and guaranteed over –55°C to +150°C - meets requirements for space-grade, avionics, and defense electronics. |
Applications
| Avionics Power Regulation | Downhole Instrumentation |
|---|---|
Use Scenario: Regulating unfiltered 28V aircraft bus to 3.3V for flight control microcontrollers and sensor interfaces in vibration-prone, wide-temperature environments. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC converter providing clean, stable 3.3V rail with immunity to input transients and cold-start conditions. Use Value: –55°C to +150°C qualification ensures startup and regulation during extreme thermal cycling; 65V abs max rating withstands load-dump transients up to 60V. |
Use Scenario: Powering MEMS pressure/temperature sensors and telemetry ICs in oil/gas well logging tools exposed to >150°C ambient and high-vibration mechanical stress. IC Role / Device Role / Timing Role: High-reliability buck regulator delivering 5V from 48V battery stack, operating continuously at elevated junction temperatures. Use Value: Exposed-pad MSOP package with θJC = 10°C/W enables effective heat transfer into tool housing; 12µA IQ extends battery life during dormant logging phases. |
| Military Vehicle Electronics | Industrial Process Controllers |
Use Scenario: Converting 24V vehicle battery (with 12V–36V variation and cranking dips) to 1.8V for FPGA configuration and real-time DSP cores in armored vehicle C4ISR systems. IC Role / Device Role / Timing Role: Input-robust, low-noise point-of-load regulator supporting deterministic boot timing and glitch-free operation during engine start. Use Value: Programmable ISET allows peak current tuning to match FPGA dynamic load profile; RUN pin hysteresis prevents oscillation during marginal input conditions. |
Use Scenario: Generating isolated 5V and 3.3V rails from 48V DC distribution bus in PLC backplanes and distributed I/O modules deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Compact, thermally efficient DC/DC stage replacing discrete buck controllers and external MOSFETs in space-constrained DIN-rail mounted enclosures. Use Value: Fixed-output variants (VPRG1/VPRG2 configured) eliminate feedback resistors - reducing component count, layout sensitivity, and long-term drift risk. |
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 |
|---|---|---|---|
| LTC3631MPMSE#PBF | Same pinout, –55°C to +150°C rating, but adds programmable frequency (200kHz–2MHz) and external synchronization; higher IQ (25µA) in Burst Mode®. | Required where EMI-sensitive environments demand spread-spectrum or synchronized switching; not drop-in for fixed-frequency designs. | Select LTC3631MPMSE#PBF only when frequency control or sync capability is needed; otherwise LTC3630MPMSE#PBF offers lower IQ and simpler layout. |
| LM5164QPWPRQ1 | Automotive AEC-Q100 Grade 1 (–40°C to +125°C), 3V–65V input, 500mA, but uses external MOSFETs and requires compensation network; 26µA IQ. | Suitable for automotive infotainment or ADAS where AEC-Q100 compliance is mandatory; lacks integrated switches and thermal robustness of LTC3630MP. | Choose LM5164QPWPRQ1 for automotive production requiring AEC-Q100; LTC3630MPMSE#PBF remains superior for extended-temp industrial/avionics where integration and IQ matter most. |
Compared with LTC3631MPMSE#PBF, the LTC3630MPMSE#PBF trades frequency flexibility for lower quiescent current and simpler design; versus LM5164QPWPRQ1, it delivers higher integration and wider temperature range at the cost of AEC-Q100 certification - making it optimal for high-reliability non-automotive applications demanding minimal external components and ultra-low standby power.
Availability
LTC3630MPMSE#PBF is available at Aetrix Electronics and suitable for avionics power regulation, downhole instrumentation, military vehicle electronics, industrial process controllers, and extended-temperature embedded systems requiring stable component supply across long product lifecycles.
Supply support for LTC3630MPMSE#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving precision instrumentation, aerospace, industrial, and communications markets.
The LTC3630MPMSE#PBF belongs to Linear's high-voltage monolithic buck converter family, designed specifically for ruggedized power conversion in mission-critical systems where input voltage range, temperature resilience, and ultra-low quiescent current are non-negotiable.
FAQ
What is the guaranteed operating temperature range for the LTC3630MPMSE#PBF?
The LTC3630MPMSE#PBF is tested and guaranteed over a junction temperature range of –55°C to +150°C. This MP grade exceeds commercial and industrial specifications and is intended for aerospace, defense, and downhole applications where extreme thermal resilience is required. The datasheet confirms full electrical performance validation across this range, including feedback reference accuracy, RUN pin thresholds, and peak current limits.
Does the LTC3630MPMSE#PBF support fixed-output voltages without external resistors?
Yes, the LTC3630MPMSE#PBF supports factory-configured fixed outputs of 1.8V, 3.3V, or 5V using only the VPRG1 and VPRG2 pins - no external feedback resistors required. For example, shorting both VPRG1 and VPRG2 to SS (soft-start node) configures 1.8V output; tying VPRG1 to SS and VPRG2 to GND sets 5V. This simplifies layout, improves long-term stability, and reduces noise susceptibility compared to adjustable configurations.
How is peak current programmed on the LTC3630MPMSE#PBF, and what is its impact on output current?
Peak current on the LTC3630MPMSE#PBF is set by a resistor (RISET) from the ISET pin to GND, with a nominal 5µA internal current source generating the control voltage. The typical peak current ranges from 100mA (RISET = 0Ω) to 1.2A (ISET floating). Since maximum average output current equals half the peak current, a 1.2A peak yields 500mA max output - matching the device's rated capability. This programming directly affects inductor sizing, output ripple, and light-load efficiency.
Can multiple LTC3630MPMSE#PBF devices be paralleled for higher output current?
Yes, the LTC3630MPMSE#PBF includes a dedicated FBO (Feedback Comparator Output) pin that enables current sharing. By connecting the FBO pin of a "master" LTC3630MPMSE#PBF to the VFB pins of one or more "slave" units, their feedback loops synchronize, allowing combined output currents exceeding 500mA. The FBO pin features a 20µA pull-up and 70Ω pull-down, ensuring robust inter-device signaling without external level-shifting circuitry.
What thermal design considerations apply to the LTC3630MPMSE#PBF in MSOP package?
The LTC3630MPMSE#PBF in MSE16 package has θJA = 45°C/W and θJC = 10°C/W, but these values assume the exposed pad (Pin 17) is fully soldered to a large, low-thermal-resistance PCB ground plane. Failure to do so risks thermal runaway at full load, especially above 85°C ambient. Analog Devices' datasheet mandates exposed-pad soldering and recommends ≥4 thermal vias under the pad connected to internal ground planes to maintain safe junction temperatures within the –55°C to +150°C specification.
LTC3630MPMSE#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):
- 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#PBF FAQ
1.How can I place an order for LTC3630MPMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630MPMSE#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 LTC3630MPMSE#PBF reliable?
The price and inventory of LTC3630MPMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630MPMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3630MPMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630MPMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630MPMSE#PBF?
LTC3630MPMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630MPMSE#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 LTC3630MPMSE#PBF?
For technical support, including LTC3630MPMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630MPMSE#PBF requirements.
6.How does Aetrix verify that LTC3630MPMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3630MPMSE#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 LTC3630MPMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3630MPMSE#PBF?
All LTC3630MPMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630MPMSE#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 LTC3630MPMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3630MPMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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