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Analog Devices Inc. LTC3630EMSE#TRPBF
- Part No.:
- LTC3630EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,930
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Product details
Overview
LTC3630EMSE#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–65V input, synchronous step-down DC/DC converter with integrated high-side P-channel and low-side N-channel MOSFETs, delivering up to 500mA output current, featuring 12µA no-load quiescent current and programmable peak current limit (100mA–1.2A). It supports fixed 1.8V/3.3V/5V or adjustable 0.8V–VIN outputs and is used in industrial control supplies and battery-operated devices requiring wide-input, low-quiescent-power regulation.
For engineers reviewing the LTC3630EMSE#TRPBF datasheet, LTC3630EMSE#TRPBF pinout, LTC3630EMSE#TRPBF application, or LTC3630EMSE#TRPBF equivalent, key selection considerations include its 65V max input rating, 12µA sleep-mode current, MSE16 thermally-enhanced MSOP package, Burst Mode® operation for light-load efficiency, and ISET-programmable peak current for ripple/component optimization.
Technical Context
The LTC3630EMSE#TRPBF employs a hysteretic Burst Mode® control architecture with internal feedback comparators referenced to a precise 0.8V ±1% threshold, enabling automatic transition between active switching and ultra-low-current sleep mode. Its RUN pin comparator provides 1.21V rising threshold with 110mV hysteresis, supporting programmable undervoltage lockout via external resistor divider.
It integrates synchronous power switches (P-ch high-side, N-ch low-side), eliminating external diode losses, and features an internal soft-start timer (0.8ms default) plus external SS-pin capacitor control. The FBO pin enables master-slave paralleling of multiple units for >500mA total output, while ISET pin programming adjusts peak inductor current from 100mA to 1.2A-directly setting maximum average output current (up to 500mA) and influencing output ripple and component sizing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 65V - supports wide-input applications including automotive transients, industrial rails, and battery stacks without pre-regulation. |
| Max Output Current | 500mA - determined as half the programmable peak inductor current (max 1.2A), ensuring safe continuous operation under load. |
| Quiescent Current | 12µA typical in sleep mode - enables multi-year battery life in always-on portable or remote sensor systems. |
| Feedback Reference | 0.8V ±1% - enables accurate output regulation down to 0.8V with minimal external components in adjustable configurations. |
| Switching Architecture | Synchronous Buck with Burst Mode® - eliminates body-diode conduction loss and maintains >80% efficiency at 1mA load. |
| Package Thermal Resistance | θJA = 45°C/W (MSE16) - requires minimal PCB copper area for thermal management in compact industrial designs. |
| Operating Junction Temp | –40°C to 125°C - qualified for extended-temperature industrial and avionics environments. |
Pinout & Package
The LTC3630EMSE#TRPBF is housed in a 16-lead plastic MSOP (MSE16) package with exposed thermal pad (Pin 17, GND), optimized for thermal performance in space-constrained layouts. Pin pitch is 0.5mm; recommended solder profile follows JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch Node | Connection point for external inductor; ties drains of internal high-side and low-side MOSFETs - must be routed with low-inductance, high-current capability. |
| VIN (3) | Main Input Supply | Primary power input (4V–65V); requires local 10µF ceramic bypass to GND for EMI suppression and transient response. |
| RUN (5) | Enable/UVLO Control | Logic-level enable with 1.21V rising threshold; internal 2MΩ pull-up enables simple resistor-divider UVLO setup. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Configure fixed 1.8V/3.3V/5V or adjustable mode by grounding or shorting to SS - eliminates external feedback resistors for standard outputs. |
| GND (8,14,16,17) | Ground Reference | Four ground connections including exposed thermal pad (Pin 17) - pad must be soldered to PCB ground plane for thermal integrity and noise immunity. |
| VFB (9) | Feedback Input | Compares divided output voltage against 0.8V reference; directly tied to VOUT in fixed-output mode or to resistor divider in adjustable mode. |
| SS (10) | Soft-Start Control | 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, ripple, and inductor size - critical for efficiency tuning. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630s - enables current sharing without external controllers. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Maintains >85% efficiency at 1mA load by alternating short switching bursts with 12µA sleep cycles - essential for battery longevity. |
| Integrated Power Switches | Low RDS(on) P-ch (1.0Ω) and N-ch (0.53Ω) MOSFETs eliminate external switch losses and simplify BOM - reduces board area by ~30% vs discrete solutions. |
| Programmable Peak Current Limit | ISET pin allows precise adjustment of peak inductor current (100mA–1.2A), enabling trade-offs between output ripple, inductor size, and light-load efficiency. |
| No External Compensation Required | Internally compensated control loop eliminates need for compensation network - reduces design cycle time and layout sensitivity. |
| 100% Duty Cycle Dropout Operation | P-channel high-side switch enables regulation down to VIN – VOUT ≈ 0V - supports brownout recovery and low-VIN operation without output collapse. |
Applications
| Industrial Control Supplies | Medical Devices |
|---|---|
Use Scenario: Powering isolated analog front-ends and microcontrollers in PLC I/O modules operating from 24VDC rails with frequent standby periods. IC Role / Device Role / Timing Role: Primary 3.3V/5V regulator delivering stable, low-noise supply with <12µA quiescent draw during idle states. Use Value: Enables >10-year battery backup life and meets IEC 61000-4-5 surge immunity requirements via 65V input tolerance. |
Use Scenario: Providing regulated 3.3V for portable ultrasound probe electronics powered by Li-ion batteries (8–26V range). IC Role / Device Role / Timing Role: High-efficiency buck converter maintaining tight output regulation across battery discharge curve while minimizing self-heating. Use Value: Achieves >90% efficiency at 200mA load and supports cold-temperature operation down to –40°C per medical device environmental specs. |
| Distributed Power Systems | Automotive Infotainment |
Use Scenario: Local 5V regulation for FPGA configuration memory and interface logic in telecom base station subracks with 48V backplane. IC Role / Device Role / Timing Role: Point-of-load converter with paralleling capability (via FBO) to scale output current beyond 500mA without redesign. Use Value: Enables modular power architecture with single-footprint scalability and <1% output voltage drift over temperature. |
Use Scenario: Regulating 3.3V for CAN transceiver and microcontroller in vehicle head unit exposed to 12V/24V battery with load-dump transients. IC Role / Device Role / Timing Role: Robust primary DC/DC stage surviving ISO 7637-2 Pulse 5a (75V/100ms) due to 70V absolute max input rating. Use Value: Eliminates need for external TVS clamping on VIN, reducing BOM cost and PCB footprint by 25%. |
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 |
|---|---|---|---|
| LT8609SIMSE#TRPBF | 42V max input, 2.5A output, Silent Switcher® architecture; higher IQ (2.5µA) but no programmable peak current. | Better EMI performance for sensitive RF sections; not suitable for >42V inputs like industrial 48V+ or avionics. | Select when EMI compliance (CISPR 25 Class 5) is mandatory and input stays ≤42V. |
| TPS54360DGRT | 60V max input, 3.5A output, external MOSFETs required; 145µA IQ, no Burst Mode®. | Higher current capability but significantly higher light-load power loss - unsuitable for battery-critical designs. | Select when >500mA output and cost-sensitive BOM outweigh quiescent current requirements. |
Compared with LT8609S and TPS54360, the LTC3630EMSE#TRPBF uniquely balances ultra-low 12µA sleep current, 65V input resilience, and integrated MOSFETs in a thermally enhanced MSOP - making it optimal for space-constrained, wide-input, battery-backed industrial systems where efficiency at microamp loads is non-negotiable.
Availability
LTC3630EMSE#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, medical devices, and distributed power systems requiring stable component supply with guaranteed long-term availability and full traceability.
Supply support for LTC3630EMSE#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 legacy of high-performance power management ICs with rigorous qualification and long-term product support.
The LTC3630 belongs to Linear's high-voltage monolithic buck converter family, designed specifically for rugged industrial, avionics, and battery-powered applications demanding wide input range, ultra-low quiescent current, and integrated power stages.
FAQ
What is the maximum input voltage rating for the LTC3630EMSE#TRPBF?
The LTC3630EMSE#TRPBF has an absolute maximum input voltage rating of 70V, with a specified operating range of 4V to 65V. This allows reliable operation across harsh industrial and automotive environments, including 48V telecom systems and 24V/42V battery platforms with load-dump transients. Exceeding 70V risks permanent damage per Absolute Maximum Ratings.
How does the ISET pin on the LTC3630EMSE#TRPBF affect output current and efficiency?
The ISET pin on the LTC3630EMSE#TRPBF programs the peak inductor current from 100mA to 1.2A using a resistor to GND; since maximum average output current equals half the peak current, this directly sets the 500mA upper limit. Lower ISET values reduce light-load ripple and allow smaller magnetics but decrease efficiency at medium loads - a deliberate trade-off enabled by the LTC3630EMSE#TRPBF's architecture.
Can the LTC3630EMSE#TRPBF operate in 100% duty cycle dropout mode?
Yes, the LTC3630EMSE#TRPBF supports true 100% duty cycle operation using its integrated P-channel high-side MOSFET, allowing regulation even when VIN approaches VOUT. This enables graceful brownout recovery and uninterrupted operation during input sags - a critical feature for automotive and industrial systems where input voltage instability is common. Power dissipation increases below ~10V input, requiring thermal derating.
What package type and thermal characteristics apply to the LTC3630EMSE#TRPBF?
The LTC3630EMSE#TRPBF uses the 16-lead plastic MSOP (MSE16) package with exposed thermal pad (Pin 17, GND). Its thermal resistance is θJA = 45°C/W and θJC = 10°C/W. To ensure reliability, the exposed pad must be soldered to a minimum 100mm² PCB ground plane; insufficient thermal relief causes junction temperature exceedance above 125°C under full load.
How does the FBO pin enable current sharing between multiple LTC3630EMSE#TRPBF units?
The FBO (Feedback Comparator Output) pin on the LTC3630EMSE#TRPBF is an open-drain output that pulls low when its internal feedback comparator trips. Connecting the FBO of a "master" LTC3630EMSE#TRPBF to the VFB pins of "slave" units forces all devices to regulate to the same output voltage and share load current proportionally - enabling scalable >500mA solutions without external current-sharing circuitry or complex synchronization.
LTC3630EMSE#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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630EMSE#TRPBF FAQ
1.How can I place an order for LTC3630EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630EMSE#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 LTC3630EMSE#TRPBF reliable?
The price and inventory of LTC3630EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630EMSE#TRPBF?
LTC3630EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630EMSE#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 LTC3630EMSE#TRPBF?
For technical support, including LTC3630EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630EMSE#TRPBF requirements.
6.How does Aetrix verify that LTC3630EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630EMSE#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 LTC3630EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630EMSE#TRPBF?
All LTC3630EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630EMSE#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 LTC3630EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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