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Analog Devices Inc. LTC3610IWP#TRPBF
- Part No.:
- LTC3610IWP#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 64-PowerVFQFN
- Datasheet:
-
LTC3610IWP#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 12A 64QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,752
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Product details
Overview
LTC3610IWP#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–24V input, regulating 2.5V output with ±1% reference accuracy and valley current mode control. It integrates dual N-channel MOSFETs, supports programmable frequency via ION pin, and operates in forced continuous or discontinuous mode for optimized efficiency/noise trade-offs in point-of-load power delivery.
For engineers reviewing the LTC3610IWP#TRPBF datasheet, LTC3610IWP#TRPBF pinout, LTC3610IWP#TRPBF application, or LTC3610IWP#TRPBF equivalent, key selection criteria include its 12A capability at high step-down ratios, 100ns minimum on-time, 9mm × 9mm 64-pin QFN package with multi-PGND/SGND separation, and integrated overvoltage, undervoltage, and foldback current protection.
Technical Context
The LTC3610IWP#TRPBF employs a constant on-time valley current mode architecture with internal RDS(ON) sensing (12mΩ top / 6.5mΩ bottom MOSFETs), enabling stable ceramic-capacitor-based designs and fast transient response. Its switching frequency is set by external resistor RON on the ION pin and modulated by VON voltage to maintain near-constant frequency across VIN and VOUT variations.
Fault management includes internal foldback current limiting (adjustable via VRNG pin from 7A to 19A), ±10% PGOOD monitoring, output overvoltage shutdown (M1 off/M2 on), and soft-start sequencing via RUN/SS capacitor. The device supports EXTVCC switchover (4.7V threshold) to bypass internal 5V regulator for higher efficiency gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 12A maximum continuous; enables single-chip PoL regulation for FPGAs, ASICs, and high-performance processors. |
| Input Voltage Range | 4V to 24V (28V absolute max); supports wide industrial and telecom supply rails without external pre-regulation. |
| Feedback Reference | 0.600V ±1% over –40°C to 125°C; ensures precise output voltage setting with minimal drift in thermal cycling. |
| Min On-Time | ≤100ns; allows stable operation at high step-down ratios (e.g., 12V→2.5V) even at high frequencies. |
| Switching Frequency | Adjustable 400kHz–1MHz via ION resistor; enables optimization of inductor size vs. efficiency in space-constrained designs. |
| Current Limit Range | Programmable 7A–19A via VRNG pin (0.5V–0.7V); permits safe derating for thermal margin or overload tolerance. |
| Shutdown IQ | 15µA typical; minimizes standby power loss in battery-backed or always-on systems. |
Pinout & Package
Package: 64-lead 9mm × 9mm plastic QFN with exposed thermal pad (WP package), rated for –40°C to 125°C junction temperature. Features 13 PVIN pins, 12 PGND pins, 14 SGND pins, and dedicated power/ground partitioning for EMI control and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1,2,3,56–65) | Power Ground | Low-inductance return path for high-current switch node; must connect directly to CIN(–) and CVCC(–) to minimize ground bounce. |
| SW (4–11,26,55,66) | Switch Node | Drain connection of top MOSFET and source of bottom MOSFET; routes high di/dt current to inductor and bootstrap capacitor. |
| PVIN (12–25,67) | Main Input Supply | Distributed high-current VIN input; requires local low-ESR ceramic decoupling (≥4.7µF) per group to suppress ripple and noise. |
| SGND (28,31–34,40,42,45–50,68) | Signal Ground | Reference for feedback, error amplifier, and timing circuits; connects to PGND at single point to avoid noise coupling. |
| ITH (38) | Error Amplifier Output / Current Threshold | Controls valley current limit; voltage range 0–2.4V maps to zero-to-maximum inductor current; used for compensation and soft-start ramp. |
| VRNG (37) | Current Limit Range | Sets maximum valley current (7–19A) via 0.5V–0.7V analog input; default 0.7V (19A) when tied to GND. |
| FCB (39) | Forced Continuous Mode | Logic-selectable mode control: GND = forced continuous (low-noise), INTVCC = discontinuous (high-efficiency at light load). |
| PGOOD (36) | Power Good Monitor | Open-drain output asserting low when VOUT deviates >±10% from regulation; used for system power sequencing and fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| True Valley Current Mode Control | Enables stable operation with ceramic output capacitors and eliminates need for external current-sense resistors. |
| Programmable Minimum On-Time (≤100ns) | Supports high-frequency, high-step-down conversion (e.g., 24V→2.5V) without pulse-skipping or instability. |
| Integrated Dual N-Channel MOSFETs | Eliminates external high-side/low-side switches and Schottky catch diode, reducing BOM count and layout complexity. |
| Adjustable Foldback Current Limit | VRNG pin scales current limit from 7A to 19A, allowing thermal design margining and short-circuit robustness tuning. |
| EXTVCC Switchover (4.7V threshold) | Automatically disables internal 5V LDO and powers INTVCC from external 5V rail, improving efficiency and gate drive strength. |
Applications
| Telecom Point-of-Load | Industrial FPGA Core Power |
|---|---|
Use Scenario: Regulating 2.5V core supply for high-density telecom line cards with 12A peak load and strict thermal limits. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing full 12A load with valley current sensing and fast transient recovery. Use Value: Achieves >90% efficiency at 12A/12VIN, reduces board area vs. multiphase solutions, and meets EN55022 Class B EMI with proper layout. | Use Scenario: Providing tightly regulated 2.5V to Xilinx Kintex-7 FPGA banks requiring <±1% accuracy and <100mV droop under 8A step load. IC Role / Device Role / Timing Role: Monolithic step-down regulator with programmable soft-start and PGOOD sequencing for FPGA configuration. Use Value: Delivers sub-50µs transient response (0A→8A), supports dynamic voltage scaling via VRNG, and ensures reliable startup with latchoff timer. |
| Automotive ADAS Domain Controller | Server Memory Subsystem |
Use Scenario: Powering vision processor SoCs in automotive ADAS ECUs operating from 12V battery with cold-crank (4.5V) and load-dump (28V) transients. IC Role / Device Role / Timing Role: High-reliability buck converter with UVLO (3.9V), OVLO, and thermal shutdown protecting downstream logic. Use Value: Maintains regulation down to 4V input, survives 28V transients via absolute max ratings, and provides PGOOD status for safety monitoring. | Use Scenario: Delivering 2.5V DDR3 memory termination voltage (VTT) with tight tracking and low noise in enterprise servers. IC Role / Device Role / Timing Role: Precision buck regulator configured in forced continuous mode to eliminate low-load switching noise affecting signal integrity. Use Value: Enables <15mV p-p output ripple with 100µF ceramic COUT, supports dynamic VTT tracking via feedback divider, and meets JEDEC JESD79-3F specs. |
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 |
|---|---|---|---|
| MPQ4572GSD-AEC1-P | 12A, 4–36V input, fixed 500kHz fSW, AEC-Q100 qualified; no VRNG or FCB pins; uses external current sense resistor. | Targeted for automotive; lacks programmable current limit and mode control; requires additional components for soft-start and PGOOD. | Choose for AEC-Q100 compliance in automotive environments where fixed frequency and qualification outweigh configurability needs. |
| TPS546D24RSAR | 12A, 4–18V input, PMBus interface, 300kHz–2MHz fSW, integrated telemetry; no valley current mode; uses D-CAP3 control. | Designed for digital power systems requiring telemetry, margining, and remote configuration; higher BOM cost and complexity. | Choose when digital control, real-time telemetry, or multi-rail coordination via PMBus is required over analog simplicity and cost. |
Compared with MPQ4572GSD-AEC1-P and TPS546D24RSAR, the LTC3610IWP#TRPBF offers superior analog configurability (VRNG, FCB, VON, ION), valley current mode stability with ceramic caps, and lower component count for non-digital, high-reliability PoL applications - but lacks automotive qualification and digital interface capabilities.
Availability
LTC3610IWP#TRPBF is available at Aetrix Electronics and suitable for telecom point-of-load, industrial FPGA core power, and automotive ADAS domain controller applications requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 125°C.
Supply support for LTC3610IWP#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 semiconductor leader specializing in high-performance analog, mixed-signal, and power management ICs, with deep expertise in precision power conversion and signal conditioning.
The LTC3610IWP#TRPBF belongs to ADI's Linear Technology legacy high-current monolithic DC/DC converter family, designed specifically for demanding point-of-load applications where efficiency, thermal performance, and analog configurability are critical in space-constrained systems.
FAQ
What is the maximum output current capability of the LTC3610IWP#TRPBF?
The LTC3610IWP#TRPBF delivers up to 12A continuous output current under typical thermal conditions (TJ ≤ 125°C). Its actual achievable current depends on PCB layout, airflow, input voltage, and output voltage - e.g., 12A is sustainable at VIN = 12V → VOUT = 2.5V with adequate copper area and 200 LFM airflow. The device supports programmable current limiting (7A–19A) via the VRNG pin to accommodate thermal derating.
How does the LTC3610IWP#TRPBF achieve stable operation with ceramic output capacitors?
The LTC3610IWP#TRPBF uses true valley current mode control with internal MOSFET RDS(ON) sensing, eliminating the need for external current-sense resistors and providing inherent loop stability with low-ESR ceramic capacitors. Its error amplifier transconductance (1.7mS typical) and feedforward compensation via the VON pin enable robust phase margin (>45°) across load and line variations without requiring complex type-II/type-III networks.
Can the LTC3610IWP#TRPBF operate with an input voltage below 4V?
No - the LTC3610IWP#TRPBF has a specified operating input voltage range of 4V to 24V, with undervoltage lockout releasing at 3.5V–4.0V (typical). Below 4V, the device will not regulate; attempting operation at 3.9V may result in intermittent startup or dropout. For sub-4V inputs, consider the LTC3638 (2.5V–5.5V) or LTC3649 (1.5V–15V) as alternatives.
What is the purpose of the FCB pin on the LTC3610IWP#TRPBF?
The FCB (Forced Continuous Bias) pin on the LTC3610IWP#TRPBF selects light-load operating mode: grounding FCB forces continuous conduction mode (reducing EMI and output ripple), tying FCB to INTVCC enables discontinuous mode (improving light-load efficiency), and applying a resistive divider enables secondary-winding synchronization. This pin directly controls the comparator that disables current reversal detection, making it essential for noise-sensitive or battery-powered applications.
Does the LTC3610IWP#TRPBF support power sequencing with other regulators?
Yes - the LTC3610IWP#TRPBF supports robust power sequencing via its RUN/SS pin (soft-start timing capacitor) and open-drain PGOOD output. The RUN/SS pin allows controlled startup delay (≈3s/µF), while PGOOD asserts high only when VOUT is within ±10% of regulation, enabling daisy-chained sequencing with upstream/downstream supplies. No external logic is needed for basic sequencing in multi-rail systems.
LTC3610IWP#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)
LTC3610IWP#TRPBF FAQ
1.How can I place an order for LTC3610IWP#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3610IWP#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 LTC3610IWP#TRPBF reliable?
The price and inventory of LTC3610IWP#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3610IWP#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3610IWP#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3610IWP#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3610IWP#TRPBF?
LTC3610IWP#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3610IWP#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 LTC3610IWP#TRPBF?
For technical support, including LTC3610IWP#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3610IWP#TRPBF requirements.
6.How does Aetrix verify that LTC3610IWP#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3610IWP#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 LTC3610IWP#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3610IWP#TRPBF?
All LTC3610IWP#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3610IWP#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 LTC3610IWP#TRPBF part is unused and in its original packaging.
Return procedure for LTC3610IWP#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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