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Analog Devices Inc. LTC3630AIMSE#WTRPBF
- Part No.:
- LTC3630AIMSE#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AIMSE#WTRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
LTC3630AIMSE#WTRPBF from Analog Devices is a high-efficiency, 4V to 76V 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 automotive-grade MSOP-16 package.
For engineers reviewing the LTC3630AIMSE#WTRPBF datasheet, LTC3630AIMSE#WTRPBF pinout, LTC3630AIMSE#WTRPBF application, or LTC3630AIMSE#WTRPBF equivalent, key selection considerations include its AEC-Q100 qualification, 100% duty-cycle dropout operation, Burst Mode® efficiency at light loads, and FBO-enabled current paralleling capability for >500mA systems.
Technical Context
The LTC3630AIMSE#WTRPBF implements a hysteretic Burst Mode® control architecture with internal feedback comparator (0.8V ±1% reference), reverse-current protection, and programmable peak current sensing via ISET pin. Its P-channel high-side switch enables true 100% duty-cycle operation during input voltage dropout.
It supports four fixed-output configurations (1.8V/3.3V/5V) or adjustable output via external resistor divider, with dedicated VPRG1/VPRG2 pins. The FBO pin provides open-drain feedback comparator output for master-slave paralleling of multiple converters without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports wide-range industrial, automotive, and avionics power rails including 24V, 48V, and 72V battery systems. |
| Max Output Current | 500mA average - derived from 1.2A typical peak current limit; scalable via ISET resistor programming down to 100mA peak (50mA avg). |
| Quiescent Current | 12µA in Burst Mode sleep - enables multi-year battery life in always-on monitoring or sensor nodes. |
| Feedback Reference | 0.800V ±1% - precise threshold enabling accurate output regulation across temperature and line variations. |
| Package | MSE16 (16-lead MSOP) - thermally enhanced, AEC-Q100 qualified, with exposed pad soldered to PCB ground for θJA = 45°C/W. |
| Operating Temp | –40°C to +125°C junction - validated for under-hood automotive and industrial control environments. |
| Switch On-Resistance | Top: 1.00Ω, Bottom: 0.53Ω - defines conduction loss budget and thermal rise at full load. |
Pinout & Package
Package: MSE16 (16-lead plastic MSOP), 3mm × 4.9mm footprint, 0.75mm profile, exposed thermal pad (Pin 17) tied to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connection point between internal P- and N-MOSFET drains; ties to inductor; requires low-inductance layout for EMI control. |
| VIN (3) | Main input supply | Accepts 4V–76V; must be bypassed with ceramic capacitor close to pin for stability and ripple suppression. |
| RUN (5) | Enable/control input | 1.21V rising threshold enables operation; 0.7V falling threshold forces shutdown; supports precision UVLO via resistor divider. |
| VPRG1 / VPRG2 (6,7) | Output voltage configuration | Selects 1.8V/3.3V/5V fixed or adjustable mode; eliminates external resistors for standard outputs. |
| GND (8,14,16,17) | Ground reference & thermal path | Multiple GND pins plus exposed pad (Pin 17) must be soldered to PCB ground plane for thermal integrity and noise immunity. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; directly connected to output in fixed-mode; tied to resistor divider in adjustable mode. |
| SS (10) | Soft-start timing | Capacitor-to-ground sets output ramp time (1ms per 16.5nF); internal default is 0.8ms if floating. |
| ISET (11) | Peak current programming | Resistor-to-ground sets peak current (100mA–1.2A); determines max output current, component size, and light-load ripple trade-off. |
| FBO (12) | Feedback comparator output | Open-drain output used to parallel multiple LTC3630As by connecting master FBO to slave VFB pins. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Enables 12µA no-load IQ and >85% efficiency at 1mA load, critical for battery-powered remote sensors and always-on ECUs. |
| Integrated power switches | Eliminates external MOSFETs and gate drivers; reduces BOM count, layout area, and design validation effort. |
| Programmable peak current limit | Adjusts max output from 50mA to 500mA average via single ISET resistor-optimizes inductor/capacitor sizing and light-load ripple. |
| 100% duty-cycle dropout | P-channel high-side switch sustains regulation down to VIN ≈ VOUT, essential for brownout resilience in automotive start-stop systems. |
| AEC-Q100 Grade I qualification | Validated for –40°C to +125°C operation with automotive reliability testing-meets functional safety readiness for ASIL-B supporting systems. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power |
|---|---|
Use Scenario: Regulating 12V battery input to stable 3.3V for microcontroller, CAN transceiver, and sensor interface circuitry in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise, AEC-Q100-compliant power domain with UVLO and thermal shutdown. Use Value: 12µA quiescent current prevents battery drain during vehicle sleep mode; 76V absolute max rating withstands load dump transients up to 80V. |
Use Scenario: Converting 24V DC field bus to 5V for digital I/O isolators, ADC references, and logic-level translation in modular PLC backplanes. IC Role / Device Role / Timing Role: High-input-voltage step-down converter delivering tightly regulated 5V with minimal external components and no loop compensation. Use Value: Fixed 5V output mode eliminates feedback resistors; FBO pin enables current sharing across dual-rail I/O banks for >500mA aggregate load. |
| Avionics Sensor Interface | Medical Portable Diagnostic Device |
Use Scenario: Powering MEMS inertial measurement units (IMUs) and pressure sensors from 28V aircraft bus with strict EMI and transient immunity requirements. IC Role / Device Role / Timing Role: Robust DC/DC converter operating in Burst Mode to minimize conducted emissions while maintaining 0.8V reference accuracy over temperature. Use Value: 45°C/W thermal resistance and exposed pad enable passive cooling in sealed enclosures; 1.8V fixed output mode powers low-voltage analog front-ends. |
Use Scenario: Supplying 1.8V to ultra-low-power ARM Cortex-M microcontrollers and precision ADCs in handheld ultrasound or glucose monitors. IC Role / Device Role / Timing Role: High-efficiency, low-IQ buck regulator enabling multi-day battery life while maintaining <1% output voltage error across battery discharge curve. Use Value: Adjustable soft-start (via SS pin) prevents inrush current into Li-ion battery protection circuits; 0.8V feedback reference ensures stable regulation at minimum VOUT. |
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 |
|---|---|---|---|
| LT8609SIV#TRPBF | 42V max VIN, 2.5A output, 2.5µA IQ, Silent Switcher® architecture; requires external compensation. | Better EMI performance and higher current, but lacks 76V rating and AEC-Q100 qualification. | Choose LT8609S for noise-sensitive medical imaging subsystems where 42V input suffices and PCB area allows larger inductor. |
| TPS54360BQPWPRQ1 | 60V max VIN, 3.5A output, 14µA IQ, integrated compensation; not AEC-Q100 Grade I (only Grade 0). | Higher current and simpler design, but insufficient for 72V battery or load-dump survival; limited to –40°C to +125°C ambient only. | Choose TPS54360BQPWPRQ1 for cost-sensitive industrial HMIs needing >500mA with less stringent automotive qualification. |
Compared with LT8609SIV#TRPBF and TPS54360BQPWPRQ1, the LTC3630AIMSE#WTRPBF uniquely combines 76V operation, AEC-Q100 Grade I qualification, and 12µA IQ in a compact MSOP package-making it the only viable option for high-reliability automotive body electronics requiring extended input range and ultra-low standby power.
Availability
LTC3630AIMSE#WTRPBF is available at Aetrix Electronics and suitable for automotive body control, industrial PLC power rails, avionics sensor interfaces, and portable medical diagnostics requiring stable component supply with long lifecycle assurance.
Supply support for LTC3630AIMSE#WTRPBF 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 (now part of Analog Devices, Inc., formerly Linear Technology) designs high-performance analog, mixed-signal, and power management ICs for demanding industrial, automotive, and aerospace applications.
The LTC3630A product line delivers high-voltage, low-quiescent-current synchronous buck regulators optimized for automotive and industrial systems requiring robustness, efficiency across wide load ranges, and AEC-Q100 compliance.
FAQ
What is the maximum input voltage rating for the LTC3630AIMSE#WTRPBF?
The LTC3630AIMSE#WTRPBF has a maximum operating input voltage of 76V and an absolute maximum rating of 80V. This enables reliable operation across 24V, 48V, and 72V battery systems, including automotive load-dump transients. Operation above 76V is not guaranteed and may trigger internal protection or cause permanent damage.
Does the LTC3630AIMSE#WTRPBF support fixed-output voltages without external resistors?
Yes, the LTC3630AIMSE#WTRPBF supports 1.8V, 3.3V, and 5V fixed outputs using only the VPRG1 and VPRG2 pins shorted to SS or GND-no external feedback resistors required. This reduces component count, improves noise immunity on the feedback path, and simplifies layout for standard rail generation.
How does the ISET pin function in the LTC3630AIMSE#WTRPBF?
The ISET pin on the LTC3630AIMSE#WTRPBF programs the peak inductor current limit from 100mA to 1.2A via a resistor to GND. Since max average output current equals half the peak current, this adjusts usable output from 50mA to 500mA. It also accepts a capacitor to reduce light-load output ripple at the cost of efficiency.
Can multiple LTC3630AIMSE#WTRPBF devices be paralleled for higher current?
Yes, the LTC3630AIMSE#WTRPBF includes an FBO (Feedback Comparator Output) pin that can be connected from a master device's FBO to slave devices' VFB pins to synchronize regulation and share load current. This enables >500mA total output without external current-sharing circuitry or complex control loops.
Is the LTC3630AIMSE#WTRPBF qualified for automotive applications?
Yes, the LTC3630AIMSE#WTRPBF carries the #W suffix indicating AEC-Q100 Grade I qualification (–40°C to +125°C junction), controlled manufacturing, and automotive reliability reporting. It is approved for use in body electronics, infotainment, and ADAS power domains where extended temperature and long-term reliability are mandatory.
LTC3630AIMSE#WTRPBF 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
- 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:
- 50kHz ~ 250kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630AIMSE#WTRPBF FAQ
1.How can I place an order for LTC3630AIMSE#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AIMSE#WTRPBF 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 LTC3630AIMSE#WTRPBF reliable?
The price and inventory of LTC3630AIMSE#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AIMSE#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AIMSE#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AIMSE#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AIMSE#WTRPBF?
LTC3630AIMSE#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AIMSE#WTRPBF 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 LTC3630AIMSE#WTRPBF?
For technical support, including LTC3630AIMSE#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AIMSE#WTRPBF requirements.
6.How does Aetrix verify that LTC3630AIMSE#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AIMSE#WTRPBF 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 LTC3630AIMSE#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AIMSE#WTRPBF?
All LTC3630AIMSE#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AIMSE#WTRPBF, 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 LTC3630AIMSE#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3630AIMSE#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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