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Analog Devices Inc. LTC3630AHMSE#PBF
- Part No.:
- LTC3630AHMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width), 12 Leads, Exposed Pad
- Datasheet:
-
LTC3630AHMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:108
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Product details
Overview
LTC3630AHMSE#PBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V to 76V 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 (0.09A–1.4A). It supports adjustable or fixed 1.8V/3.3V/5V outputs and operates in Burst Mode® for ultra-low power consumption in industrial control supplies and automotive subsystems.
For engineers reviewing the LTC3630AHMSE#PBF datasheet, LTC3630AHMSE#PBF pinout, LTC3630AHMSE#PBF application, or LTC3630AHMSE#PBF equivalent, key selection considerations include its –40°C to 150°C guaranteed junction temperature range, MSE16 thermally-enhanced MSOP package with exposed pad, 0.8V ±1% feedback reference, and parallelable FBO functionality for higher-current designs.
Technical Context
The LTC3630AHMSE#PBF implements a hysteretic Burst Mode® control architecture with internal 0.8V feedback reference and programmable peak current threshold via ISET pin (100kΩ resistor yields 0.6A typical peak, 0.3A average). Its P-channel high-side switch enables 100% duty-cycle dropout operation, while reverse-current comparator and sleep-mode logic reduce no-load supply current to 12µA.
It integrates RUN pin undervoltage lockout (1.21V enable threshold, 110mV hysteresis), internal/external soft-start (0.8ms default, SS pin programmable), and FBO pin for master-slave paralleling-enabling coordinated regulation across multiple converters without external clock synchronization.
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 legacy 72V systems. |
| Output Current | Up to 500mA average - limited by peak current setting (max 1.4A peak → 0.7A avg theoretical, but rated 500mA max per datasheet). |
| Quiescent Current | 12µA at no load - enables battery-backed or energy-harvesting applications requiring multi-year standby life. |
| Feedback Reference | 0.800V ±1% - enables precise output regulation from 0.8V to VIN; fixed outputs use internal dividers (1.8V/3.3V/5V). |
| Operating Temp Range | –40°C to 150°C junction - qualified for under-hood automotive, downhole, and high-ambient industrial environments. |
| Switch On-Resistance | Top: 1.00Ω, Bottom: 0.53Ω - defines conduction loss at full load; impacts thermal design and efficiency above 100mA. |
| Peak Current Limit | Programmable 0.09A–1.4A via ISET resistor - allows optimization of inductor size, output ripple, and light-load efficiency trade-offs. |
Pinout & Package
The LTC3630AHMSE#PBF is housed in a 16-lead plastic MSOP (MSE16) package with exposed thermal pad (Pin 17 = GND), optimized for high-power density and thermal performance in space-constrained industrial and automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch Node | Connection to inductor; carries pulsed high-current waveform; requires low-inductance layout and Kelvin grounding. |
| VIN (3) | Main Input Supply | Accepts 4V–76V; must be bypassed with ceramic capacitor close to pin to suppress switching noise and supply transients. |
| RUN (5) | Enable/UVLO Control | 1.21V rising threshold enables operation; 0.7V falling forces shutdown (5µA IQ); supports precision input monitoring via resistor divider. |
| VPRG1/VPRG2 (6,7) | Output Voltage Selection | Configure fixed 1.8V/3.3V/5V or adjustable mode; floating both selects external resistive divider for custom VOUT. |
| GND (8,14,16,17) | Ground Return | Multiple ground pins + exposed pad (Pin 17) must be soldered to PCB ground plane for thermal and EMI performance. |
| VFB (9) | Feedback Input | Compares divided output voltage to 0.8V reference; direct connection to VOUT for fixed outputs; resistive divider for adjustable mode. |
| SS (10) | Soft-Start Control | Capacitor to GND sets output ramp time (1ms per 16.5nF); floating defaults to 0.8ms internal soft-start. |
| ISET (11) | Peak Current Programming | Resistor to GND sets peak current limit (0.09A–1.4A); open = max, shorted = min; also filters light-load ripple when capacitor added. |
| FBO (12) | Feedback Comparator Output | Open-drain output (20µA pull-up, 70Ω pull-down) used to parallel multiple LTC3630As by connecting to slave VFB pins. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous MOSFET Integration | Internal P-channel high-side and N-channel low-side switches eliminate external diode losses and improve full-load efficiency by ~5–8% vs. asynchronous designs. |
| Burst Mode® Operation | Maintains >80% efficiency down to 100µA load while drawing only 12µA VIN supply current - critical for always-on sensor nodes and remote monitoring. |
| 100% Duty-Cycle Dropout | P-channel top switch enables regulation even when VIN ≈ VOUT (e.g., 5.5V input → 5V output), eliminating need for LDO post-regulation in brownout conditions. |
| Programmable Peak Current Limit | Adjusts inductor current swing via single ISET resistor - reduces component count, eases EMI filtering, and shrinks solution size versus fixed-current controllers. |
| Parallelable Architecture | FBO pin allows seamless current sharing across ≥2 LTC3630AHMSE#PBF units without external current-sense or timing circuitry - scales output to 1A+ with matched thermal behavior. |
Applications
| Industrial Control Supplies | Automotive Subsystems |
|---|---|
Use Scenario: Powering PLC I/O modules, fieldbus transceivers, and isolated sensor interfaces in factory automation cabinets with 24V or 48V backplanes. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering stable 3.3V or 5V to microcontrollers, ADCs, and digital isolators. Use Value: 76V max input withstands 48V system surges and load-dump transients; 150°C rating ensures reliability in enclosed, unventilated enclosures. | Use Scenario: Supplying infotainment head-unit MCUs, camera modules, and ADAS domain controllers in engine bay or dashboard locations. IC Role / Device Role / Timing Role: High-input-voltage buck converter generating 1.8V core rail or 3.3V I/O rail from vehicle battery (9V–16V nominal, up to 76V during load dump). Use Value: –40°C to 150°C operation meets AEC-Q100 Grade 0 requirements; Burst Mode® extends battery runtime in parked-state telematics. |
| Medical Instrumentation | Avionics Power Conditioning |
Use Scenario: Providing regulated power to portable ultrasound probes, patient monitors, and infusion pump controllers where low standby power and compact size are critical. IC Role / Device Role / Timing Role: Efficient point-of-load converter stepping down 12V or 24V battery or adapter input to 5V/3.3V for mixed-signal SoCs and analog front-ends. Use Value: 12µA quiescent current enables multi-week battery life in handheld devices; MSE16 package fits tight board real estate. | Use Scenario: Regulating 28V aircraft bus to 5V/3.3V for flight data recorders, cockpit displays, and navigation sensors operating in high-vibration, wide-temperature environments. IC Role / Device Role / Timing Role: Robust primary DC/DC stage tolerant of MIL-STD-704 voltage transients and sustained high ambient temperatures. Use Value: 80V absolute max VIN and 150°C junction rating support compliance with DO-160 Section 16 surge immunity and thermal derating requirements. |
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 |
|---|---|---|---|
| LTC3630AIMSE#PBF | Same architecture and pinout, but rated for –40°C to 125°C junction - lacks extended high-temp qualification. | Not suitable for under-hood automotive or high-ambient industrial deployments requiring >125°C operation. | Select LTC3630AHMSE#PBF when ambient or self-heating pushes junction beyond 125°C; otherwise, AIMSE offers cost advantage. |
| LM5164QPWPRQ1 | 4.5V–65V input, 500mA, integrated FET, but uses constant-on-time control (not Burst Mode®); 26µA IQ vs. 12µA. | Higher IQ and narrower VIN range limit suitability in ultra-low-power or 72V-rail applications. | Choose LM5164QPWPRQ1 only if AEC-Q100 Grade 1 certification is mandatory and 76V operation is unnecessary. |
Compared with LTC3630AIMSE#PBF, the LTC3630AHMSE#PBF provides guaranteed 150°C operation essential for harsh environments, while LM5164QPWPRQ1 trades ultra-low IQ and 76V capability for automotive qualification - making LTC3630AHMSE#PBF optimal for high-reliability, wide-VIN, thermally demanding applications where drop-in replacement isn't required.
Availability
LTC3630AHMSE#PBF is available at Aetrix Electronics and suitable for industrial control supplies, automotive subsystems, and medical instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC3630AHMSE#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 industrial, automotive, communications, and healthcare markets.
The LTC3630A product line delivers high-efficiency, wide-input-voltage synchronous buck regulators with ultra-low quiescent current and robust thermal performance - designed specifically for powering mission-critical electronics in extreme ambient conditions.
FAQ
What is the maximum input voltage rating for the LTC3630AHMSE#PBF?
The LTC3630AHMSE#PBF has a maximum operating input voltage of 76V and an absolute maximum rating of 80V. This allows reliable operation across 24V, 48V, and 72V industrial and automotive power buses, including transient overvoltage events like load dump. Exceeding 80V risks permanent damage per Absolute Maximum Ratings.
How does the ISET pin configure peak current limit on the LTC3630AHMSE#PBF?
The ISET pin on the LTC3630AHMSE#PBF sources a 5µA (active) or 1µA (sleep) current; connecting a resistor from ISET to GND sets the peak current threshold via V = I × R. For example, a 100kΩ resistor yields ~0.5V → 0.6A typical peak current. Floating ISET gives 1.2A typical; shorting to GND gives 0.12A typical. The LTC3630AHMSE#PBF's max average output remains 500mA regardless.
Can multiple LTC3630AHMSE#PBF ICs be paralleled, and how is it implemented?
Yes - the LTC3630AHMSE#PBF supports current sharing via its FBO (Feedback Comparator Output) pin. Connect the FBO of one "master" LTC3630AHMSE#PBF to the VFB pins of one or more "slave" LTC3630AHMSE#PBF units. This forces all devices to regulate to the same feedback voltage, enabling balanced current sharing without external current-sense amplifiers or clock synchronization.
What is the thermal performance difference between the MSE16 and DFN packages for the LTC3630AHMSE#PBF?
The LTC3630AHMSE#PBF uses the MSE16 (MSOP) package with θJA = 45°C/W and θJC = 10°C/W. Compared to the DFN variant (θJA = 43°C/W), the MSE16 offers superior creepage/clearance for high-voltage isolation and easier manual rework, though its slightly higher θJA requires marginally larger copper area for equivalent thermal performance at 500mA continuous load.
Does the LTC3630AHMSE#PBF support fixed-output voltages without external resistors?
Yes - the LTC3630AHMSE#PBF supports pin-strapped fixed outputs: short VPRG1 and VPRG2 to GND for adjustable mode; short VPRG1 to SS and VPRG2 to GND for 5V; short VPRG1 to GND and VPRG2 to SS for 3.3V; short both to SS for 1.8V. No external feedback resistors are needed, reducing component count, noise sensitivity, and board space for standard rail generation.
LTC3630AHMSE#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):
- 76V
- Voltage - Output (Min/Fixed):
- 0.8V (1.8V, 3.3V, 5V)
- Voltage - Output (Max):
- 76V
- Current - Output:
- 500mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LTC3630AHMSE#PBF FAQ
1.How can I place an order for LTC3630AHMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AHMSE#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 LTC3630AHMSE#PBF reliable?
The price and inventory of LTC3630AHMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AHMSE#PBF is usually 5 days.
3.What payment methods are accepted for LTC3630AHMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AHMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AHMSE#PBF?
LTC3630AHMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AHMSE#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 LTC3630AHMSE#PBF?
For technical support, including LTC3630AHMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AHMSE#PBF requirements.
6.How does Aetrix verify that LTC3630AHMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AHMSE#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 LTC3630AHMSE#PBF meets industry standards.
7.What is the process for return or replacement of LTC3630AHMSE#PBF?
All LTC3630AHMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AHMSE#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 LTC3630AHMSE#PBF part is unused and in its original packaging.
Return procedure for LTC3630AHMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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