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Analog Devices Inc. LTC3630MPDHC#TRPBF
- Part No.:
- LTC3630MPDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630MPDHC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,229
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Product details
Overview
LTC3630MPDHC#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 65V 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 portable and remote industrial systems.
For engineers reviewing the LTC3630MPDHC#TRPBF datasheet, LTC3630MPDHC#TRPBF pinout, LTC3630MPDHC#TRPBF application, or LTC3630MPDHC#TRPBF 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 parallelability via FBO for higher-current designs.
Technical Context
The LTC3630MPDHC#TRPBF uses Burst Mode® control with hysteretic feedback to achieve ultra-low quiescent current while maintaining tight output regulation. Its architecture relies on an internal 0.8V reference, precision RUN pin threshold (1.21V rising, 1.10V falling), and dual-programmable VPRG1/VPRG2 pins to select fixed 1.8V/3.3V/5V outputs or enable adjustable operation.
Peak inductor current is set by a resistor from ISET to GND (or open/short), directly determining maximum output current (IOUT(MAX) = 0.5 × IPEAK). The device supports 100% duty-cycle dropout operation using its P-channel high-side switch and includes reverse-current protection, overtemperature shutdown (~180°C), and undervoltage lockout (3.5V typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports unregulated industrial rails, automotive batteries, and PoE-derived supplies without pre-regulation. |
| Output Current | Up to 500mA - determined by peak current setting (IPEAK = 100mA–1.2A); max average output = 0.5 × IPEAK. |
| Quiescent Current | 12µA typical in Burst Mode® - enables >1-year battery life in always-on sensor nodes with µA-level sleep loads. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation from 0.8V to VIN; supports accurate 1.8V/3.3V/5V fixed outputs via VPRG pins. |
| Operating Temperature | –55°C to +150°C - qualified for harsh-environment aerospace, downhole, and military applications. |
| Package | 16-lead 5mm × 3mm DFN with exposed thermal pad - θJA = 43°C/W; requires soldered GND pad for thermal performance. |
| Switch On-Resistance | Top switch: 1.00Ω, bottom switch: 0.53Ω - limits conduction loss at full load; impacts efficiency above 100mA. |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm), thermally enhanced with exposed GND pad (Pin 17). Requires PCB ground plane connection for thermal management and electrical stability.
| 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 | Accepts 4V–65V input; requires local ceramic bypass capacitor to minimize high-frequency noise and supply impedance. |
| RUN (5) | Enable/control input | 1.21V rising threshold enables operation; 1.10V falling threshold disables; internal 2MΩ pull-up enables UVLO via external divider. |
| VPRG1 (6), VPRG2 (7) | Output voltage programming | Configures fixed 1.8V/3.3V/5V or adjustable mode; eliminates external resistors for standard outputs. |
| GND (8,14,16,17) | Ground reference | Multiple GND connections including exposed thermal pad (Pin 17); all must be low-impedance to PCB ground plane. |
| VFB (9) | Feedback input | Compares divided output voltage to 0.8V reference; connects directly to output for fixed-VOUT modes. |
| SS (10) | Soft-start control | Capacitor-to-GND sets output ramp time (1ms per 16.5nF); internal 0.8ms default if floating. |
| ISET (11) | Peak current programming | Resistor-to-GND sets IPEAK (100mA–1.2A); determines max output current and influences component sizing. |
| FBO (12) | Feedback comparator output | Open-drain output used to parallel multiple LTC3630s; enables current sharing without external circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Buck Architecture | Integrated P-channel high-side and N-channel low-side MOSFETs eliminate external diode losses and improve light-load efficiency. |
| Burst Mode® Operation | Reduces quiescent current to 12µA at no load while maintaining ±1% output regulation - critical for battery longevity. |
| Programmable Peak Current Limit | Adjustable 100mA–1.2A via ISET resistor enables optimization of inductor/capacitor size, ripple, and efficiency across load range. |
| Fixed Output Voltage Options | 1.8V/3.3V/5V selectable via VPRG1/VPRG2 shorting - removes need for external feedback resistors and associated noise sensitivity. |
| 100% Duty-Cycle Dropout | P-channel high-side switch allows continuous conduction when VIN ≈ VOUT - essential for brownout resilience in automotive and avionics. |
Applications
| Industrial Control Supplies | Avionics Power Management |
|---|---|
Use Scenario: Regulating 24V or 28V aircraft bus to 3.3V for flight control sensors and data acquisition units. IC Role / Device Role / Timing Role: Primary non-isolated point-of-load regulator delivering stable 3.3V at ≤500mA with <12µA sleep current. Use Value: Extended operational lifetime under cold-soak conditions (–55°C) and immunity to input transients up to 65V. |
Use Scenario: Powering radiation-tolerant microcontrollers and interface ICs in satellite payload subsystems. IC Role / Device Role / Timing Role: High-reliability DC/DC converter operating in extended temperature range with no external compensation required. Use Value: Guaranteed –55°C to +150°C operation, internal soft-start prevents inrush-induced bus droop during orbital deployment. |
| Downhole Oil & Gas Instrumentation | Remote Battery-Powered Monitoring |
Use Scenario: Converting 48V distributed power to 5V for pressure/temperature transducers in high-temperature wellhead environments. IC Role / Device Role / Timing Role: Robust step-down regulator with 65V input tolerance and thermal shutdown at ~180°C. Use Value: Survives sustained junction temperatures up to 150°C; programmable peak current reduces inductor size in space-constrained housings. |
Use Scenario: Supplying 1.8V to ultra-low-power IoT edge nodes powered by Li-SOCl₂ primary cells. IC Role / Device Role / Timing Role: Always-on buck converter maintaining regulation during multi-year sleep cycles with 12µA quiescent draw. Use Value: Burst Mode® eliminates switching losses at µA loads; adjustable VOUT minimizes active-mode power dissipation. |
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 |
|---|---|---|---|
| LTC3630HDHC#TRPBF | Same silicon, –40°C to +150°C rating; lacks –55°C lower limit and MIL-STD screening. | Suitable for commercial/industrial high-temp use but not cryogenic or military-spec deployments. | Select when full MP-grade temperature range is unnecessary and cost optimization is prioritized. |
| LT8609SIV#TRPBF | 42V max input, 2.5A output, Silent Switcher® architecture; higher IQ (2.5µA) but no programmable IPEAK. | Better EMI performance and higher current, but narrower input range and no FBO paralleling capability. | Choose for noise-sensitive medical or communications systems where 65V input is not required. |
Compared with LTC3630HDHC#TRPBF and LT8609SIV#TRPBF, the LTC3630MPDHC#TRPBF uniquely combines –55°C start-up capability, 65V input tolerance, FBO-based current sharing, and programmable peak current - making it optimal for mission-critical, wide-temperature, multi-rail embedded power systems.
Availability
LTC3630MPDHC#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power management, and downhole instrumentation requiring stable component supply across extreme temperature and voltage conditions.
Supply support for LTC3630MPDHC#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, qualification, and documentation for the LTC portfolio. Linear's legacy expertise in precision analog and power management remains integral to the design integrity of these devices.
The LTC3630 belongs to Linear's high-voltage monolithic buck converter family, engineered specifically for ruggedized embedded power in automotive, aerospace, and industrial systems where input transients, wide temperature swings, and ultra-low quiescent current are mandatory.
FAQ
What is the guaranteed operating temperature range for the LTC3630MPDHC#TRPBF?
The LTC3630MPDHC#TRPBF is fully tested and guaranteed over –55°C to +150°C junction temperature. This extended range exceeds standard industrial and automotive grades and is validated per Linear Technology's MP (military/extended performance) qualification standards, including thermal cycling, high-temperature operating life, and low-temperature startup testing.
How does the ISET pin on the LTC3630MPDHC#TRPBF control output current?
The ISET pin on the LTC3630MPDHC#TRPBF sources a 5µA (active) or 1µA (sleep) current that develops a voltage across an external resistor to ground, setting the peak inductor current threshold. Since maximum average output current equals half the peak current, a 220kΩ resistor yields ~500mA output, while shorting ISET to GND sets ~120mA - enabling precise current scaling without changing magnetics.
Can the LTC3630MPDHC#TRPBF be used in parallel configurations?
Yes - the LTC3630MPDHC#TRPBF includes a dedicated FBO (Feedback Comparator Output) pin that can drive the VFB pins of other LTC3630MPDHC#TRPBF units. This enables true current sharing without external op-amps or complex master-slave timing, supporting scalable output currents beyond 500mA while preserving regulation accuracy and Burst Mode® efficiency.
What is the purpose of the VPRG1 and VPRG2 pins on the LTC3630MPDHC#TRPBF?
VPRG1 and VPRG2 on the LTC3630MPDHC#TRPBF configure internal feedback resistor networks to deliver factory-trimmed 1.8V, 3.3V, or 5V outputs without external resistors. Shorting both to GND enables adjustable mode using an external divider at VFB. This eliminates layout sensitivity, improves noise immunity, and reduces BOM count for common output voltages.
Does the LTC3630MPDHC#TRPBF require external compensation components?
No - the LTC3630MPDHC#TRPBF uses a hysteretic current-mode control architecture with internal compensation. It operates stably with minimal external components: input/output capacitors, inductor, and optional ISET resistor. No loop compensation network (e.g., type-II/III compensators) is needed, simplifying design and improving robustness across input/output variations.
LTC3630MPDHC#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WFDFN 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-DFN (5x3)
LTC3630MPDHC#TRPBF FAQ
1.How can I place an order for LTC3630MPDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630MPDHC#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 LTC3630MPDHC#TRPBF reliable?
The price and inventory of LTC3630MPDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630MPDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630MPDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630MPDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630MPDHC#TRPBF?
LTC3630MPDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630MPDHC#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 LTC3630MPDHC#TRPBF?
For technical support, including LTC3630MPDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630MPDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3630MPDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630MPDHC#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 LTC3630MPDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630MPDHC#TRPBF?
All LTC3630MPDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630MPDHC#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 LTC3630MPDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630MPDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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