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Analog Devices Inc. LTC3630AEDHC#TRPBF
- Part No.:
- LTC3630AEDHC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-WFDFN Exposed Pad
- Datasheet:
-
LTC3630AEDHC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 500MA 16DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,790
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Product details
Overview
LTC3630AEDHC#TRPBF from Analog Devices (formerly Linear Technology) is a high-efficiency, 4V–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, 12µA no-load quiescent current, and programmable peak current limit (0.09A–1.4A). It enables compact, robust power supplies in industrial control, avionics, and automotive subsystems requiring wide VIN tolerance and low standby power.
For engineers reviewing the LTC3630AEDHC#TRPBF datasheet, LTC3630AEDHC#TRPBF pinout, LTC3630AEDHC#TRPBF application, or LTC3630AEDHC#TRPBF equivalent, key selection criteria include its 76V max operating VIN, 0.8V ±1% feedback reference, Burst Mode® operation for light-load efficiency, 16-pin 5mm × 3mm DFN package with exposed thermal pad, and support for fixed (1.8V/3.3V/5V) or adjustable (0.8V–VIN) output configurations.
Technical Context
The LTC3630AEDHC#TRPBF implements a hysteretic Burst Mode® control architecture with internal peak current limiting and feedback comparator-based regulation. Its dual-MOSFET synchronous topology eliminates external diode losses, while the 0.8V reference and programmable VPRG pins enable precise output setting without external resistors in fixed-output modes.
It integrates undervoltage lockout (3.5V typ.), RUN pin threshold hysteresis (110mV), internal soft-start (0.8ms default), and FBO pin for master-slave paralleling - all coordinated through a single control loop that disables switching during sleep to achieve 12µA IQ, then resumes burst cycles when VFB drops 5mV below 0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 76V - supports direct connection to unregulated 24V/48V industrial rails and 72V battery systems without pre-regulation. |
| Output Current | Up to 500mA average - limited by peak current programming (IPEAK = 0.09A–1.4A); max average = 0.5 × IPEAK. |
| Quiescent Current | 12µA typical in Burst Mode® sleep - enables >1-year battery life in always-on sensor nodes with 100mAh capacity. |
| Feedback Reference | 0.800V ±1% - sets output accuracy in adjustable mode; enables 1.8V/3.3V/5V fixed outputs via VPRG1/VPRG2 pin strapping. |
| Switching Topology | Synchronous buck with integrated P-ch high-side and N-ch low-side MOSFETs - eliminates external Schottky loss, improves full-load efficiency by ~5% vs. asynchronous. |
| Package | 16-lead 5mm × 3mm DFN (DHC) with exposed GND pad - θJA = 43°C/W; requires PCB thermal pad for 125°C junction operation at 500mA. |
| Operating Temp | –40°C to +125°C (E-grade) - qualified for under-hood automotive and industrial control cabinet environments. |
Pinout & Package
Package: 16-lead plastic DFN (5mm × 3mm), 0.75mm height, exposed thermal pad (Pin 17) soldered to PCB GND for thermal management. Pin 1 = SW; Pins 2,4,13,15 = NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (1) | Switch node | Connects to inductor; carries pulsed current up to 1.4A peak; requires low-inductance layout to minimize EMI. |
| VIN (3) | Main input supply | Accepts 4V–76V; bypass capacitor required between VIN and GND to suppress high-frequency ripple. |
| RUN (5) | Enable/shutdown control | 1.21V rising threshold enables operation; 0.7V falling forces 5µA shutdown; supports resistor-divider UVLO. |
| VPRG1/VPRG2 (6,7) | Output voltage selection | Strap to GND/SS to select 1.8V/3.3V/5V fixed output or leave both at GND for adjustable mode. |
| GND (8,14,16,17) | Ground reference & thermal path | Multiple GND pins and exposed pad reduce thermal resistance; pad must be soldered for rated power dissipation. |
| VFB (9) | Feedback input | Compares divided output to 0.8V reference; connect directly to VOUT for fixed outputs or to divider for adjustable. |
| SS (10) | Soft-start timing | Capacitor to GND sets ramp time (1ms per 16.5nF); floating defaults to 0.8ms internal soft-start. |
| ISET (11) | Peak current programming | Resistor to GND sets IPEAK (0.09A–1.4A); short to GND = min current; open = max current. |
| FBO (12) | Feedback comparator output | Open-drain output (20µA pull-up, 70Ω pull-down) for paralleling multiple LTC3630As in higher-current designs. |
Key Features
| Feature | Design Value |
|---|---|
| Burst Mode® operation | Maintains regulation at ultra-low load with 12µA IQ, enabling energy harvesting and battery-backed applications. |
| Integrated dual MOSFETs | Eliminates external diode and gate drivers; reduces BOM count and layout area while improving efficiency above 10% load. |
| Programmable peak current limit | Adjusts IPEAK from 0.09A to 1.4A via ISET resistor - optimizes inductor/capacitor size and light-load ripple trade-offs. |
| Fixed-output voltage options | 1.8V/3.3V/5V selectable via VPRG pins - removes need for external feedback resistors and associated noise sensitivity. |
| 100% duty cycle dropout | P-channel high-side switch enables regulation down to VIN – VDROP; supports brownout operation with minimal voltage headroom. |
Applications
| Industrial Control Supply | Avionics Power Module |
|---|---|
Use Scenario: Regulating 28V aircraft bus to 5V for flight data recorder logic and sensors. IC Role / Device Role / Timing Role: Primary non-isolated DC/DC converter providing stable 5V rail with UVLO protection against bus sag. Use Value: 76V absolute max rating withstands load dump transients; 12µA IQ extends backup battery life during ground maintenance. | Use Scenario: Powering 3.3V FPGA configuration circuitry from 270V DC aircraft distribution system via intermediate 28V stage. IC Role / Device Role / Timing Role: Secondary point-of-load regulator delivering tightly regulated 3.3V with fast transient response. Use Value: Fixed 3.3V output via VPRG strapping ensures immunity to resistor drift; 125°C operation sustains reliability in sealed avionics enclosures. |
| Automotive Body Controller | Portable Medical Instrument |
Use Scenario: Converting 12V battery to 1.8V for microcontroller core supply in door module ECUs. IC Role / Device Role / Timing Role: High-efficiency buck converter with programmable current limit to match MCU dynamic load profile. Use Value: Adjustable peak current (via ISET) minimizes inductor size and EMI; 4V–76V range covers cold-crank (4.5V) to load-dump (60V+). | Use Scenario: Generating 5V from Li-ion battery pack (3.0–4.2V) for USB-powered diagnostic interface in handheld ultrasound device. IC Role / Device Role / Timing Role: Step-up/down capable buck converter maintaining 5V output across full battery discharge curve. Use Value: 0.8V feedback reference enables stable 5V regulation even at 3.0V VIN; 12µA IQ preserves battery runtime during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5V–65V input, 1A output, 13µA IQ, requires external MOSFETs; no integrated low-side switch. | Requires external high-side and low-side MOSFETs and gate drivers - increases BOM cost and layout complexity. | Choose when higher output current (>500mA) and AEC-Q100 qualification are mandatory, and board space allows discrete FETs. |
| MAX20004AATP+T | 3.5V–36V input, 600mA output, 2.5µA IQ, integrated FETs, but lacks programmable current limit and fixed-output strapping. | No VPRG pins for 1.8V/3.3V/5V selection; requires external feedback resistors for all outputs. | Choose for ultra-low-IQ (<5µA) applications with lower VIN range and where fixed-output convenience is not required. |
Compared with LM5164QDDARQ1 and MAX20004AATP+T, the LTC3630AEDHC#TRPBF uniquely combines 76V input capability, integrated dual MOSFETs, programmable peak current, and pin-strappable fixed outputs - making it optimal for space-constrained, wide-input industrial and avionics power rails where simplicity and ruggedness are critical.
Availability
LTC3630AEDHC#TRPBF is available at Aetrix Electronics and suitable for industrial control supplies, avionics power modules, and automotive body controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3630AEDHC#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC3630A belongs to ADI's Power by Linear™ family of high-voltage DC/DC converters designed for demanding industrial, automotive, and aerospace applications where input voltage range, reliability, and low quiescent current are critical.
FAQ
What is the maximum input voltage rating for the LTC3630AEDHC#TRPBF?
The LTC3630AEDHC#TRPBF has a maximum operating input voltage of 76V and an absolute maximum rating of 80V. This allows direct connection to 48V industrial buses and 72V battery systems while surviving transient overvoltages up to 80V without damage. Operation above 76V is not guaranteed and may cause premature failure.
How does the LTC3630AEDHC#TRPBF achieve 12µA quiescent current?
The LTC3630AEDHC#TRPBF achieves 12µA typical quiescent current through Burst Mode® operation: during light loads, it enters a sleep cycle where internal power switches and comparators are disabled, drawing only bias current. The device wakes periodically to deliver short burst cycles only when output voltage droop exceeds 5mV below the 0.8V reference - minimizing average supply current.
Can the LTC3630AEDHC#TRPBF be used in parallel for higher output current?
Yes, the LTC3630AEDHC#TRPBF supports current sharing via its FBO (feedback comparator output) pin. Connecting the FBO pin of a master LTC3630AEDHC#TRPBF to the VFB pins of one or more slave devices synchronizes regulation and enables combined output currents beyond 500mA. Each device must use identical inductor and output capacitor values for stable sharing.
What is the function of the ISET pin on the LTC3630AEDHC#TRPBF?
The ISET pin on the LTC3630AEDHC#TRPBF programs the peak inductor current limit from 0.09A to 1.4A using an external resistor to GND. It sources a 5µA current (reduced to 1µA in sleep mode) that develops a voltage across RISET, which sets the current comparator threshold. This allows optimization of component size, efficiency, and output ripple for specific load requirements.
Does the LTC3630AEDHC#TRPBF require external compensation components?
No, the LTC3630AEDHC#TRPBF uses a hysteretic Burst Mode® control architecture that requires no external compensation components. Its internal feedback loop is inherently stable across all operating conditions and load ranges, eliminating the need for compensation networks, simplifying design, and reducing bill-of-materials cost.
LTC3630AEDHC#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):
- 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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DFN (5x3)
LTC3630AEDHC#TRPBF FAQ
1.How can I place an order for LTC3630AEDHC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3630AEDHC#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 LTC3630AEDHC#TRPBF reliable?
The price and inventory of LTC3630AEDHC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3630AEDHC#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3630AEDHC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3630AEDHC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3630AEDHC#TRPBF?
LTC3630AEDHC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3630AEDHC#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 LTC3630AEDHC#TRPBF?
For technical support, including LTC3630AEDHC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3630AEDHC#TRPBF requirements.
6.How does Aetrix verify that LTC3630AEDHC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3630AEDHC#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 LTC3630AEDHC#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3630AEDHC#TRPBF?
All LTC3630AEDHC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3630AEDHC#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 LTC3630AEDHC#TRPBF part is unused and in its original packaging.
Return procedure for LTC3630AEDHC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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