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Analog Devices Inc. LTC3610EWP#TRPBF
- Part No.:
- LTC3610EWP#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 64-PowerVFQFN
- Datasheet:
-
LTC3610EWP#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 12A 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,189
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Product details
Overview
LTC3610EWP#TRPBF from Analog Devices (formerly Linear Technology) is a monolithic synchronous step-down DC/DC converter delivering up to 12A output current from a 4V to 24V input, featuring valley current mode control, adjustable switching frequency via external resistor, ±1% 0.6V reference, and power-good monitoring - deployed in point-of-load regulation for FPGA, ASIC, and DSP core supplies.
For engineers reviewing the LTC3610EWP#TRPBF datasheet, LTC3610EWP#TRPBF pinout, LTC3610EWP#TRPBF application, or LTC3610EWP#TRPBF equivalent, key selection criteria include minimum on-time (≤100 ns), programmable current limit via VRNG, forced continuous/discontinuous mode control via FCB, and thermal performance in the 9mm × 9mm 64-pin QFN package with 12 PGND pins for low-impedance return paths.
Technical Context
The LTC3610EWP#TRPBF implements a constant on-time valley current mode architecture with internal N-channel MOSFETs (12 mΩ top / 6.5 mΩ bottom), enabling stable operation at high step-down ratios and fast transient response. Its ITH pin serves dual roles: error amplifier compensation node and valley current threshold control point, directly mapping feedback deviation to inductor current setpoint.
Frequency is implicitly determined by on-time (set via ION current and VON voltage) and duty cycle, allowing near-constant switching across VIN and VOUT variations. Overvoltage protection triggers M1 shutdown and M2 latching, while foldback current limiting reduces valley current to ~1/6 of maximum when VFB drops near 0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A max continuous; supports high-current digital loads without external MOSFETs. |
| Input Voltage Range | 4V to 24V; accommodates 5V, 12V, and 24V industrial bus rails with 28V absolute max rating. |
| Feedback Reference | 0.600V ±1%; enables precise output setting (e.g., 2.5V via R1/R2 = 3.17k/1k) with tight line/load regulation. |
| Min On-Time | ≤100ns; permits stable 2.5V output from 12V input at ~500kHz, critical for high VIN/VOUT ratios. |
| Thermal Limit | Junction temperature max 125°C; 28°C/W θJA enables 12A operation with moderate PCB copper area. |
| Shutdown IQ | 15µA; supports low-power system standby without auxiliary LDO dependency. |
| PGOOD Threshold | ±10% VOUT window; open-drain output asserts low when VFB exits 0.54–0.66V range. |
Pinout & Package
Package: 64-pin (9mm × 9mm) QFN with exposed thermal pad (WP suffix); features 12 dedicated PGND pins, 15 PVIN pins, and 14 SGND pins for optimal power/signal ground separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1,2,3,56–65) | Power Ground Return | Low-impedance path for high di/dt switch currents; must connect directly to CIN/CVCC negative terminals. |
| SW (4–11,26,55,66) | Switch Node | Connects to inductor and bootstrap capacitor; swings from –0.3V to VIN; requires tight layout to minimize EMI. |
| VFB (43) | Error Amplifier Input | Senses output via resistive divider; high-impedance node (±50nA bias) requiring noise-free routing away from SW. |
| ITH (38) | Current Threshold & Compensation | Combines error amp output and current comparator threshold; sets valley current limit and loop stability. |
| VRNG (37) | Valley Current Range Control | 0.5V–0.7V input adjusts max valley current from ~10A to ~19A; tied to ground for default 19A limit. |
| RUN/SS (30) | Enable & Soft-Start | 0.8V threshold for shutdown; external capacitor sets soft-start ramp (~3s/µF) and overcurrent latchoff delay. |
| PGOOD (36) | Output Regulation Monitor | Open-drain output pulled low if VFB < 0.54V or > 0.66V; requires external pull-up for system sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Valley Current Mode Control | Enables stable operation at ultra-low duty cycles (<10%) without external slope compensation. |
| Programmable Valley Current Limit | Adjustable from ~10A to ~19A via VRNG pin voltage, supporting diverse load profiles without hardware change. |
| Discontinuous/Forced Continuous Mode | FCB pin selects light-load behavior: discontinuous for peak efficiency, forced continuous for low-noise/low-EMI systems. |
| True Current Limit Foldback | Reduces valley current to ~3A during short-circuit, limiting power dissipation and junction temperature rise. |
| Integrated Power Switches | 12 mΩ/6.5 mΩ MOSFETs eliminate external diode and reduce BOM count; INTVCC regulated at 5V ±6%. |
Applications
| FPGA Core Supply | Industrial PLC I/O Module |
|---|---|
Use Scenario: Providing 1.2V/10A to Xilinx Kintex-7 FPGA core rail with tight transient response requirements. IC Role / Device Role / Timing Role: Primary point-of-load regulator with valley current mode control ensuring sub-10µs recovery from 0A→8A load steps. Use Value: Minimum on-time ≤100ns enables stable 1.2V output from 12V input at 600kHz, minimizing inductor size while maintaining regulation. | Use Scenario: Generating 3.3V/8A for isolated CAN and RS-485 transceivers in harsh factory environments. IC Role / Device Role / Timing Role: High-efficiency buck converter with forced continuous mode to suppress conducted EMI in EMC-sensitive zones. Use Value: 12A capability with 15µA shutdown IQ supports always-on diagnostics while meeting EN 61000-6-4 emission limits. |
| Medical Imaging Sensor Array | Automotive ADAS Camera Power |
Use Scenario: Delivering 2.5V/12A to CMOS image sensor array with strict ripple (<10mVpp) and thermal constraints. IC Role / Device Role / Timing Role: Synchronous buck regulator using ceramic output capacitors and valley current control for low-noise analog supply. Use Value: Stable operation with ceramic COUT enabled by inherent ESR independence; ±1% reference ensures consistent pixel bias voltage. | Use Scenario: Powering 1.8V/6A image signal processor (ISP) in automotive surround-view camera with AEC-Q200 alignment. IC Role / Device Role / Timing Role: Robust DC/DC converter operating from 5V–16V automotive battery with overvoltage lockout and thermal shutdown. Use Value: 24V absolute max input and 125°C junction rating support cold-crank and load-dump conditions per ISO 7637-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP8770GQ-Z | 4.5–18V input, 12A, fixed 500kHz freq, no VRNG/FCB pins, smaller 5mm × 5mm QFN-32 | Lacks programmable current limit and mode control; suited for cost-sensitive, fixed-frequency designs | Select MP8770GQ-Z only if VRNG/FCB flexibility is unnecessary and board space is constrained. |
| TPS546D24RQFR | 4–18V input, 12A, PMBus interface, integrated telemetry, 6mm × 6mm QFN-40 | Includes digital monitoring (VOUT, IOUT, temp) but requires firmware integration and adds complexity | Choose TPS546D24RQFR when real-time telemetry and dynamic margining are required in server or telecom systems. |
Compared with MP8770GQ-Z and TPS546D24RQFR, the LTC3610EWP#TRPBF provides unique analog configurability (VRNG, FCB, VON, ION) for precision current limiting and noise-sensitive applications, while maintaining full 12A capability across its 4V–24V input range without digital overhead.
Availability
LTC3610EWP#TRPBF is available at Aetrix Electronics and suitable for FPGA core supplies, industrial PLC I/O modules, medical imaging sensor arrays, and automotive ADAS camera power systems requiring stable component supply with long-term lifecycle assurance.
Supply support for LTC3610EWP#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors.
The LTC3610EWP#TRPBF belongs to Linear's monolithic high-current buck converter product line, designed specifically for demanding point-of-load applications where efficiency, thermal performance, and analog configurability outweigh digital control complexity.
FAQ
What is the minimum recommended input voltage for stable operation of the LTC3610EWP#TRPBF?
The LTC3610EWP#TRPBF has an undervoltage lockout (UVLO) release threshold of 3.5V to 4.0V. Stable operation requires VIN ≥ 4V per datasheet specifications; operation below 4V risks intermittent enable/disable cycling due to UVLO hysteresis. The device is rated for 4V to 24V continuous operation, with 28V absolute maximum input.
How does the VRNG pin affect current limiting in the LTC3610EWP#TRPBF?
The VRNG pin on the LTC3610EWP#TRPBF sets the maximum valley current limit between ~10A and ~19A via a 0.5V–0.7V input voltage. At 0.5V, typical valley current limit is ~10A; at 0.7V (default when grounded), it is ~19A. This directly scales the maximum average output current, enabling safe operation under varying thermal conditions without changing external components.
Can the LTC3610EWP#TRPBF operate in forced continuous conduction mode (FCCM) at light loads?
Yes - the LTC3610EWP#TRPBF supports forced continuous conduction mode via the FCB pin. When FCB is held below 0.54V (typically tied to GND), the controller disables discontinuous mode and maintains synchronous switching even at zero load, reducing output voltage ripple and EMI compared to DCM operation.
What is the purpose of the ITH pin on the LTC3610EWP#TRPBF beyond compensation?
Beyond serving as the error amplifier compensation node, the ITH pin on the LTC3610EWP#TRPBF directly sets the valley current comparator threshold. Its voltage (0V–2.4V) linearly controls inductor valley current: 0.8V corresponds to zero current, and higher voltages increase the current limit proportionally - making ITH both a stability and current-limiting control point.
Is the LTC3610EWP#TRPBF RoHS-compliant and lead-free?
Yes - the LTC3610EWP#TRPBF is RoHS-compliant and features a lead-free finish. The "#TRPBF" suffix explicitly denotes tape-and-reel packaging with lead-free (Pb-free) termination, meeting JEDEC J-STD-020 moisture sensitivity level 3 and IPC/JEDEC standard for lead-free assembly.
LTC3610EWP#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 12A
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-QFN (9x9)
LTC3610EWP#TRPBF FAQ
1.How can I place an order for LTC3610EWP#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3610EWP#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 LTC3610EWP#TRPBF reliable?
The price and inventory of LTC3610EWP#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3610EWP#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3610EWP#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3610EWP#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3610EWP#TRPBF?
LTC3610EWP#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3610EWP#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 LTC3610EWP#TRPBF?
For technical support, including LTC3610EWP#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3610EWP#TRPBF requirements.
6.How does Aetrix verify that LTC3610EWP#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3610EWP#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 LTC3610EWP#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3610EWP#TRPBF?
All LTC3610EWP#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3610EWP#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 LTC3610EWP#TRPBF part is unused and in its original packaging.
Return procedure for LTC3610EWP#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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