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Analog Devices Inc. LTC3636EUFD-1#TRPBF
- Part No.:
- LTC3636EUFD-1#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC3636EUFD-1#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 6A DL 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,182
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Product details
Overview
LTC3636EUFD-1#TRPBF from Analog Devices is a dual-channel monolithic synchronous step-down regulator delivering 6A per channel across independent 3.1V–20V inputs, with fixed 1.8V–12V output voltage range (LTC3636-1 variant), 500kHz–4MHz adjustable switching frequency, and integrated die temperature monitoring - used in high-density point-of-load power supplies for FPGA, ASIC, and automotive ECUs.
For engineers reviewing the LTC3636EUFD-1#TRPBF datasheet, LTC3636EUFD-1#TRPBF pinout, LTC3636EUFD-1#TRPBF application, or LTC3636EUFD-1#TRPBF equivalent, key selection criteria include its dual-phase interleaved operation capability, AEC-Q100 qualification, ±8% PGOOD threshold accuracy, 0.6V internal reference tolerance (±1%), and validated 95% peak efficiency at 6A/5V output.
Technical Context
The LTC3636EUFD-1#TRPBF employs a controlled on-time current mode architecture with phase-lockable switching frequency, enabling stable operation at high step-down ratios and fast transient response. Its two channels operate 180° out of phase and share synchronized clocking via MODE/SYNC pin, supporting both forced continuous and Burst Mode® operation.
Each channel features independent RUN enable control, valley-current limiting (6A typ), internal 0.6V reference with ±1% tolerance over –40°C to 125°C, and integrated overvoltage (22.5V VIN lockout) and overtemperature protection. The TMON pin provides a 200°C/V scalable analog temperature monitor output referenced to die junction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.1V to 20V per channel - supports single-cell Li-ion up to 12V/20V industrial rails without external pre-regulation. |
| VOUT Range | 1.8V to 12V - fixed range for LTC3636-1 variant; enables direct powering of I/O rails, DDR memory, and automotive microcontrollers. |
| Output Current | 6A per channel - sustained delivery with thermal derating; supports dual-phase parallel configuration for >12A loads. |
| Switching Frequency | 500kHz to 4MHz - programmable via RT resistor or external sync clock; enables compact 0.56µH inductor use at 2MHz. |
| Efficiency | Up to 95% - measured at 12V→5V/6A; achieved via 32mΩ top / 18mΩ bottom MOSFETs and low-quiescent-current Burst Mode®. |
| Reference Voltage | 0.6V ±1% (–40°C to 125°C) - ensures <±0.5% output regulation error across temperature and line/load conditions. |
| PGOOD Threshold | ±8% bad-to-good, ±5% good-to-bad - provides robust power sequencing margin for FPGA and SoC reset assertion. |
Pinout & Package
Package: 4mm × 5mm, 28-lead plastic QFN (UFD) with exposed thermal pad; rated for –40°C to 125°C junction temperature; θJA = 21°C/W on 6-layer demo board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| ITH1 / ITH2 | Error amplifier output & loop compensation node | Connects to RC network for stability tuning; tied to INTVCC for internal compensation - avoids external component count. |
| RUN1 / RUN2 | Channel enable input | Active-high logic (1.22V threshold); controls independent startup/shutdown sequencing for multi-rail systems. |
| MODE/SYNC | Mode select & external clock input | Ground = forced continuous; float/INTVCC = Burst Mode®; driven clock = frequency sync + forced continuous - eliminates beat frequencies. |
| VFB1 / VFB2 | Feedback input (0.6V reference) | Resistor divider sets output voltage; supports tracking via TRACKSS pins - enables controlled power-up ramp for stacked rails. |
| PGOOD1 / PGOOD2 | Open-drain power-good status | Active-low signal with 40µs filter; asserts after soft-start and releases only when VFB within ±5% - prevents false resets during transients. |
| TMON | Analog die temperature monitor | 1.5V at 25°C, 200°C/V slope - allows real-time thermal telemetry without external sensor; tie to INTVCC to disable. |
| SW1 / SW2 | Switch node outputs | High-frequency drain nodes for external inductors; require low-inductance layout to minimize EMI and switching losses. |
| BOOST1 / BOOST2 | Floating gate drive supply | Bootstrap capacitor connection; enables high-side NMOS drive above VIN - critical for >90% duty cycle operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel interleaved operation | 180° phase shift reduces RMS input ripple by ~30%, enabling smaller input capacitors and lower EMI in compact PCB layouts. |
| AEC-Q100 qualified | Rated for automotive under-hood applications (-40°C to 125°C TJ); includes VIN overvoltage lockout (22.5V) and thermal shutdown. |
| Adjustable soft-start & tracking | Internal 1ms soft-start (10–90%); TRACKSS pins accept external voltage ramp to coordinate multi-rail power-up sequence. |
| Burst Mode® vs forced continuous | 600µA sleep current in Burst Mode® extends battery life; forced continuous eliminates output ripple at light load for noise-sensitive analog circuits. |
| Integrated temperature monitoring | TMON pin delivers calibrated analog voltage (200°C/V) - enables closed-loop thermal management or predictive maintenance in industrial systems. |
Applications
| Automotive ADAS ECU Power | FPGA Core & I/O Rail Supply |
|---|---|
Use Scenario: Dual-rail power for vision processor SoC with 1.2V core and 3.3V I/O, operating in vehicle cabin environment. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering regulated 1.2V/6A and 3.3V/6A from 12V battery rail with AEC-Q100 compliance. Use Value: Interleaved operation minimizes input capacitance and conducted EMI; TMON enables thermal throttling before junction exceeds 125°C. |
Use Scenario: High-efficiency, low-noise power for Xilinx Kintex Ultrascale+ FPGA requiring tightly regulated core (0.85V) and auxiliary (1.8V) rails. IC Role / Device Role / Timing Role: Dual-channel buck controller managing independent soft-start, power-good sequencing, and dynamic voltage scaling. Use Value: ±1% reference and ±5% PGOOD window ensure reliable configuration loading; Burst Mode® reduces idle power in standby states. |
| Industrial PLC CPU Module | Test Equipment DC Power Subsystem |
Use Scenario: Compact 24V-to-5V/3.3V conversion for ARM-based controller in DIN-rail mounted PLC with limited board area. IC Role / Device Role / Timing Role: Monolithic dual buck replacing discrete controllers + MOSFETs; supports 20V max input for brownout resilience. Use Value: 4mm × 5mm QFN package saves >40% board space vs dual discrete solutions; RT-programmable frequency optimizes inductor size. |
Use Scenario: Precision bench power subsystem supplying multiple instrument rails (±15V analog, 5V digital, 3.3V logic) from shared 24V input. IC Role / Device Role / Timing Role: Secondary regulator stage providing clean, sequenced outputs with tracking and independent enable control. Use Value: TRACKSS pins enable synchronized ramp-up of analog/digital rails; PGOOD signals feed system-level watchdog and fault logging. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ8633BGLE-10-Z | Fixed 10A single-channel output; no dual independent channels; 4.5V–16V VIN; no TMON or TRACKSS. | Suitable for higher-current single-rail needs but lacks independent dual-channel control or thermal telemetry. | Select when needing >6A per rail and willing to use two separate ICs or accept reduced feature set. |
| TPS546B24RVFT | Single-channel 15A; supports PMBus; 4.5V–18V VIN; no Burst Mode®; requires external compensation. | Targeted at digitally managed server/telecom rails; lacks AEC-Q100 rating and analog tracking capability. | Prefer for systems requiring telemetry, margining, or firmware-controlled voltage adjustment over analog simplicity. |
Compared with MPQ8633BGLE-10-Z and TPS546B24RVFT, the LTC3636EUFD-1#TRPBF uniquely delivers true dual independent 6A channels with integrated thermal monitoring, analog tracking, and automotive qualification - making it optimal for space-constrained, thermally aware, and safety-critical multi-rail designs.
Availability
LTC3636EUFD-1#TRPBF is available at Aetrix Electronics and suitable for automotive ADAS modules, FPGA power systems, industrial PLCs, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for LTC3636EUFD-1#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The LTC3636EUFD-1#TRPBF belongs to the Power by Linear™ family of monolithic DC/DC regulators, engineered for high-efficiency, high-density point-of-load conversion in automotive, industrial, and communications infrastructure applications.
FAQ
What is the output voltage range supported by the LTC3636EUFD-1#TRPBF?
The LTC3636EUFD-1#TRPBF supports a fixed output voltage range of 1.8V to 12V, as defined by its LTC3636-1 variant designation. This differs from the base LTC3636 (0.6V–5V range). The 1.8V minimum enables direct powering of standard I/O rails and automotive microcontrollers without additional post-regulation stages.
Does the LTC3636EUFD-1#TRPBF support synchronization to an external clock?
Yes, the LTC3636EUFD-1#TRPBF supports external clock synchronization via the MODE/SYNC pin. When driven with a clean CMOS clock signal, the internal PLL locks the switching frequency to the external source and automatically selects forced continuous mode - eliminating beat frequencies in multi-IC systems.
How does the TMON pin function on the LTC3636EUFD-1#TRPBF?
The TMON pin on the LTC3636EUFD-1#TRPBF outputs an analog voltage proportional to die temperature at 200°C/V (1.5V at 25°C). It enables real-time thermal monitoring without external sensors. Tying TMON to INTVCC disables the circuit, reducing quiescent current by ~1.5µA.
What protection features are integrated into the LTC3636EUFD-1#TRPBF?
The LTC3636EUFD-1#TRPBF integrates VIN overvoltage lockout (22.5V trip), overtemperature shutdown, short-circuit protection via valley-current limiting, and PGOOD filtering (40µs). It also features undervoltage lockout on INTVCC (2.7V rising) and RUN pin hysteresis (1.22V/1.01V thresholds) for robust startup control.
Can the LTC3636EUFD-1#TRPBF operate in dual-phase single-output mode?
Yes, the LTC3636EUFD-1#TRPBF supports dual-phase interleaved operation for single-output configurations exceeding 6A. Channels must be configured 180° out of phase by tying RUN, VFB, TRACKSS, and ITH pins together and using external compensation - achieving improved thermal balance and reduced input ripple.
LTC3636EUFD-1#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 3.1V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 6A
- Frequency - Switching:
- Adjustable
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x5)
LTC3636EUFD-1#TRPBF FAQ
1.How can I place an order for LTC3636EUFD-1#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3636EUFD-1#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 LTC3636EUFD-1#TRPBF reliable?
The price and inventory of LTC3636EUFD-1#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3636EUFD-1#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3636EUFD-1#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3636EUFD-1#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3636EUFD-1#TRPBF?
LTC3636EUFD-1#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3636EUFD-1#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 LTC3636EUFD-1#TRPBF?
For technical support, including LTC3636EUFD-1#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3636EUFD-1#TRPBF requirements.
6.How does Aetrix verify that LTC3636EUFD-1#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3636EUFD-1#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 LTC3636EUFD-1#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3636EUFD-1#TRPBF?
All LTC3636EUFD-1#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3636EUFD-1#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 LTC3636EUFD-1#TRPBF part is unused and in its original packaging.
Return procedure for LTC3636EUFD-1#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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