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Analog Devices Inc. LTC3630AHMSE#WTRPBF
- Part No.:
- LTC3630AHMSE#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AHMSE#WTRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,343
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Product details
Overview
LTC3630AHMSE#WTRPBF from Analog Devices is a high-efficiency, 4V–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 rated for –40°C to +150°C junction temperature.
For engineers reviewing the LTC3630AHMSE#WTRPBF datasheet, LTC3630AHMSE#WTRPBF pinout, LTC3630AHMSE#WTRPBF application, or LTC3630AHMSE#WTRPBF equivalent, this page provides verified pin functions, confirmed thermal performance (θJA = 45°C/W), validated fixed/adjustable output configurations (1.8V/3.3V/5V or 0.8V–VIN), and real-world parallel operation capability via FBO pin - all critical for high-reliability industrial and automotive power design.
Technical Context
The LTC3630AHMSE#WTRPBF employs Burst Mode® control with hysteretic feedback to achieve ultra-low 12µA quiescent current at no load while maintaining regulation. Its dual-MOSFET synchronous architecture enables 100% duty-cycle dropout operation and eliminates external compensation.
Peak current is set via ISET pin using a resistor-to-GND (100kΩ yields ~450mA peak → 225mA avg), directly determining inductor size, output ripple, and light-load efficiency trade-offs. The RUN pin provides precise undervoltage lockout (1.21V enable threshold, 110mV hysteresis) and shutdown control, while FBO enables master-slave paralleling for >500mA total output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports wide-range industrial and automotive battery inputs including 24V, 48V, and 72V systems. |
| Max Output Current | 500mA average - limited by 1.2A typical peak current; adjustable down to 100mA peak (50mA avg) via ISET resistor. |
| Quiescent Current | 12µA typical in sleep mode - enables multi-year battery life in always-on monitoring applications. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation from 0.8V up to VIN; supports 1.8V/3.3V/5V fixed outputs without external resistors. |
| Operating Temp Range | –40°C to +150°C junction - AEC-Q100 qualified for under-hood automotive and harsh industrial environments. |
| Package Thermal Resistance | θJA = 45°C/W (MSOP-16) - requires exposed pad soldering to PCB ground plane for thermal compliance at full load. |
| Switch On-Resistance | Top switch: 1.00Ω, bottom switch: 0.53Ω - defines conduction loss and thermal rise at 500mA output. |
Pinout & Package
Package: 16-lead plastic MSOP (MSE16), 3mm × 5mm × 0.85mm profile, thermally enhanced with exposed GND pad (Pin 17) requiring PCB soldering for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch Node | Connection to inductor; carries pulsed high-current waveform; must be routed with minimal loop area to reduce EMI. |
| VIN (3) | Main Input Supply | Accepts 4V–76V; requires local 10µF–22µF ceramic bypass capacitor to GND for stability and transient response. |
| RUN (5) | Enable/UVLO Control | 1.21V rising threshold enables operation; 110mV hysteresis prevents chatter; internal 2MΩ pull-up allows resistor-divider UVLO setup. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Configure fixed 1.8V/3.3V/5V or adjustable mode (both grounded); no external resistors needed for standard outputs. |
| GND (8,14,16,17) | Ground Return | Multiple GND pins plus exposed 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 to 0.800V reference; connects directly to VOUT for fixed outputs or to resistor divider for adjustable mode. |
| SS (10) | Soft-Start Control | Capacitor-to-GND sets ramp time (1ms per 16.5nF); floating defaults to 0.8ms internal soft-start to limit inrush current. |
| ISET (11) | Peak Current Programming | Resistor-to-GND sets peak current (100mA–1.2A); short to GND = 120mA peak; open = 1.2A peak; determines max output and component sizing. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) - connects to VFB of slave converters to enable current sharing across multiple LTC3630As. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® Operation | Reduces no-load IQ to 12µA while maintaining regulation - essential for battery-powered remote sensors and always-on telematics. |
| Integrated Power Switches | High-side P-MOSFET + low-side N-MOSFET eliminate external switches and gate drivers - reduces BOM count and layout complexity. |
| Programmable Peak Current Limit | Adjusts max output from 50mA to 500mA average via single ISET resistor - optimizes inductor/capacitor size and light-load efficiency. |
| 100% Duty-Cycle Dropout | Enables regulation down to VIN – VDROP; maintains output even as input drops to near-VOUT - critical for automotive cold-crank scenarios. |
| AEC-Q100 Qualified | Rated for –40°C to +150°C junction temperature with automotive reliability testing - approved for engine control, ADAS, and infotainment power rails. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC I/O Module |
|---|---|
Use Scenario: Regulating 12V battery input to stable 3.3V for microcontroller, CAN transceiver, and sensor interface in under-hood ECU. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 350mA continuous output with Burst Mode® for low-idle current during vehicle sleep mode. Use Value: 12µA quiescent current prevents battery drain over weeks of parking; 150°C rating ensures operation at 125°C ambient under hood. |
Use Scenario: Converting 24V industrial rail to 5V for isolated digital I/O logic and fieldbus communication ICs in modular PLC backplane. IC Role / Device Role / Timing Role: High-input-voltage buck converter with programmable 500mA output and FBO-enabled paralleling for redundant 1A supply. Use Value: 76V max input withstands 24V system transients (ISO 7637-2 Pulse 1/2a); MSOP package fits dense backplane layouts with thermal pad for forced-air cooling. |
| Avionics Power Management | Medical Patient Monitor |
Use Scenario: Generating 1.8V core supply for FPGA-based flight data recorder from 28V aircraft bus with strict EMI and reliability requirements. IC Role / Device Role / Timing Role: Low-noise, high-efficiency synchronous buck with internal compensation and no external loop components. Use Value: Fixed 1.8V output (VPRG1+VPRG2 = SS) eliminates resistor tolerance error; 45°C/W θJA enables convection-only cooling in sealed avionics enclosure. |
Use Scenario: Providing isolated 5V auxiliary supply for touch-screen controller and USB charging port in portable patient monitor powered by Li-ion battery pack. IC Role / Device Role / Timing Role: Wide-input buck converter supporting 8V–36V battery range and delivering 500mA with soft-start to avoid display flicker on power-up. Use Value: Internal 0.8ms soft-start (SS pin floating) prevents inrush-induced brownout; 0.8V reference enables accurate 5.0V ±1% output for USB compliance. |
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 |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 300mA, 1.5MHz fixed-frequency, requires external compensation, 40µA IQ. | Higher switching frequency enables smaller magnetics but higher EMI; less suitable for ultra-low-power battery hold-up. | Select LM5164QPWPRQ1 when board space is constrained and fixed-frequency EMI filtering is preferred over lowest IQ. |
| MAX20004AATP+ | 3.5V–65V input, 600mA, 2.2MHz, spread-spectrum, 28µA IQ, integrated LDO bias rail. | Includes dedicated 3.3V/150mA LDO for gate driver bias; better for driving external high-side switches but larger solution size. | Select MAX20004AATP+ when powering external MOSFETs or needing auxiliary bias supply - not for pure integrated-buck use cases. |
Compared with LM5164QPWPRQ1 and MAX20004AATP+, the LTC3630AHMSE#WTRPBF delivers superior no-load efficiency (12µA vs ≥28µA), wider 4V–76V input range, and true 100% duty-cycle operation - making it uniquely suited for automotive cold-crank and industrial brownout resilience where input can dip below 5V.
Availability
LTC3630AHMSE#WTRPBF is available at Aetrix Electronics and suitable for automotive engine control units, industrial PLCs, avionics power supplies, and medical patient monitors requiring stable component supply with guaranteed AEC-Q100 qualification and extended temperature support.
Supply support for LTC3630AHMSE#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) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3630A product line delivers high-voltage, high-efficiency synchronous buck converters optimized for automotive, industrial, and aerospace applications demanding ultra-low quiescent current, wide input range, and AEC-Q100 reliability.
FAQ
What is the maximum input voltage rating for the LTC3630AHMSE#WTRPBF?
The LTC3630AHMSE#WTRPBF has an absolute maximum input voltage of 80V and a recommended operating range of 4V to 76V. This 76V upper limit ensures reliable operation across 24V, 48V, and 72V industrial and commercial vehicle systems while maintaining margin against transients defined in ISO 7637-2.
How does the LTC3630AHMSE#WTRPBF achieve 12µA quiescent current?
The LTC3630AHMSE#WTRPBF achieves 12µA quiescent current through Burst Mode® operation: during light loads, it enters sleep cycles where both power switches are off and only the feedback comparator remains active, drawing just 12µA from VIN while maintaining output regulation via the output capacitor.
Can the LTC3630AHMSE#WTRPBF be used in parallel for higher current output?
Yes, the LTC3630AHMSE#WTRPBF supports current sharing via its FBO (Feedback Comparator Output) pin. Connecting the FBO of a master device to the VFB pins of one or more slave LTC3630AHMSE#WTRPBF units enables synchronized operation and combined output current beyond 500mA without external current-sense circuitry.
What is the purpose of the ISET pin on the LTC3630AHMSE#WTRPBF?
The ISET pin on the LTC3630AHMSE#WTRPBF sets the peak inductor current limit (100mA–1.2A) using a resistor to GND. This directly controls maximum average output current (up to 500mA), influences inductor and capacitor sizing, and allows optimization of light-load efficiency versus output ripple.
Is the LTC3630AHMSE#WTRPBF qualified for automotive applications?
Yes, the LTC3630AHMSE#WTRPBF is AEC-Q100 qualified for automotive applications, with guaranteed operation from –40°C to +150°C junction temperature and manufacturing controls meeting automotive reliability standards - confirmed by its #W suffix and listing in Analog Devices' automotive-grade portfolio.
LTC3630AHMSE#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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630AHMSE#WTRPBF FAQ
1.How can I place an order for LTC3630AHMSE#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AHMSE#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 LTC3630AHMSE#WTRPBF reliable?
The price and inventory of LTC3630AHMSE#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AHMSE#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AHMSE#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AHMSE#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AHMSE#WTRPBF?
LTC3630AHMSE#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AHMSE#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 LTC3630AHMSE#WTRPBF?
For technical support, including LTC3630AHMSE#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AHMSE#WTRPBF requirements.
6.How does Aetrix verify that LTC3630AHMSE#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AHMSE#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 LTC3630AHMSE#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AHMSE#WTRPBF?
All LTC3630AHMSE#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AHMSE#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 LTC3630AHMSE#WTRPBF part is unused and in its original packaging.
Return procedure for LTC3630AHMSE#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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