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Analog Devices Inc. LTC3730CG#TRPBF
- Part No.:
- LTC3730CG#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 36-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
LTC3730CG#TRPBF.pdf
- Description:
- IC REG CTRLR INTEL 1OUT 36SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,209
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Product details
Overview
LTC3730CG#TRPBF from Analog Devices (formerly Linear Technology) is a 3-phase, current-mode synchronous buck controller for high-current CPU/GPU core power supplies. It delivers up to 50A output with ±5% per-phase current matching, operates at 250–600kHz per phase, supports Intel Mobile VID (0.6V–1.75V), and integrates three independent N-channel MOSFET drivers in a 36-lead SSOP package.
For engineers reviewing the LTC3730CG#TRPBF datasheet, LTC3730CG#TRPBF pinout, LTC3730CG#TRPBF application, or LTC3730CG#TRPBF equivalent, this page provides verified technical context, exact pin functions, real-world operating modes (Burst Mode, Stage Shedding, forced PWM), thermal and transient performance data, and validated alternative controllers for IMVP-III-compliant high-efficiency multiphase DC/DC designs.
Technical Context
The LTC3730CG#TRPBF implements a fixed-frequency, phase-lockable current-mode architecture with 120° inter-phase timing separation. Each of its three independent control channels features dedicated SENSE+/- inputs, ITH-based current threshold scaling, and synchronized top/bottom gate drivers (TG/BG) with <90ns rise/fall times and 50–60ns dead-time control.
It integrates an operational amplifier (±5mV offset, 2MHz GBW) for mode-switching voltage programming and remote sensing, plus a precision 0.600V reference (±1% over temperature) with VID DAC decoding for IMVP-III compliance. The PLLIN/PLLFLTR interface enables external synchronization or DC-set frequency tuning from 250kHz to 600kHz per phase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Phases | 3-phase interleaved operation with 120° phase shift - reduces input/output RMS ripple by √3× and triples effective switching frequency for faster transient response. |
| Switching Frequency Range | 250kHz to 600kHz per phase - adjustable via PLLFLTR pin voltage (0V–2.4V); enables optimization of efficiency vs. size trade-offs. |
| VOUT Programming Range | 0.6V to 1.75V via 5-bit VID interface - fully compliant with Intel Mobile Voltage Identification Definition (IMVP-III). |
| Current Matching Accuracy | ±5% max mismatch between phases - ensures balanced thermal loading and allows smaller, lower-cost inductors and MOSFETs. |
| Reference Voltage Accuracy | ±1% over 0°C to 70°C ambient - guarantees tight output regulation across industrial temperature range without external calibration. |
| Operating Supply Range (VCC) | 4.5V to 7V - powers internal logic and gate drivers; requires local 0.1µF decoupling to PGND for stable high-current switching. |
| Max Duty Cycle | 95% to 98.5% - supports wide VIN-to-VOUT ratios (e.g., 12V→1.2V) while maintaining dropout recovery via internal boost recharge logic. |
Pinout & Package
Package: 36-lead narrow-body SSOP (0.209" width), RoHS-compliant, moisture-sensitive level 3. Thermal resistance θJA = 95°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID4 (Pins 1,18,19,20,36) | 5-bit digital voltage identification input | Directly sets regulated output voltage (0.6V–1.75V) per IMVP-III standard; internal 3µA pull-up eliminates need for external resistors. |
| RUN/SS (Pin 16) | Soft-start timer / run enable / short-circuit detection | Capacitor-connected node controls startup ramp time, enables latch-off shutdown after programmable overcurrent timeout, and resets on VCC undervoltage (<3.8V). |
| ITH (Pin 17) | Error amplifier output & current threshold control | Analog control voltage (0.3V–2.4V) that scales all three current comparators' trip points - central point for loop compensation and stability tuning. |
| SENSE1+/– to SENSE3+/– (Pins 10–15) | Differential current sense inputs per phase | Measure voltage drop across external RSENSE; threshold is 65–85mV with ±5% matching - enables accurate per-phase current limiting and balancing. |
| TG1–TG3 (Pins 33,30,22) | Top-side N-MOSFET gate drivers | Floating high-side drivers with BOOST-referenced swing; support bootstrap operation up to 38V and deliver 5A peak current for fast MOSFET turn-on. |
| BG1–BG3 (Pins 27,25,24) | Bottom-side N-MOSFET gate drivers | Ground-referenced drivers with 5A peak sink/source capability; feature 20–90ns rise/fall times and precise dead-time control to prevent shoot-through. |
| PGOOD (Pin 35) | Open-drain power-good indicator | Asserts low when VOUT deviates >±10% for ≥100µs - provides system-level fault signaling with no external pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| OPTI-LOOP® Compensation | Minimizes required output capacitance by optimizing error amplifier phase margin - reduces COUT count and board area in high-current applications. |
| Stage Shedding™ Mode | Automatically disables two phases below ~10% load - eliminates gate charge and switching losses of inactive phases while maintaining constant frequency and low noise. |
| Burst Mode® Operation | Enables discontinuous conduction at light loads by pulsing full-power cycles followed by sleep intervals - achieves >85% efficiency at 1A output (VIN=12V, VOUT=1.5V). |
| Integrated Operational Amplifier | Configurable as remote-sense amplifier or mode-switching gain stage (±5mV offset, 35mA output drive) - supports dynamic voltage scaling (DVS) and adaptive load-line control. |
| Robust Protection Suite | Includes overvoltage soft-latch, current foldback under short-circuit, timed short-circuit shutdown with defeat option, and thermal shutdown at 130°C–165°C. |
Applications
| High-Performance Notebook Computers | Tablet Computers |
|---|---|
Use Scenario: Core voltage regulation for dual-core or quad-core mobile CPUs requiring dynamic VID adjustment and rapid load transients (0A → 50A in <4µs). IC Role / Device Role / Timing Role: 3-phase synchronous buck controller providing tightly matched per-phase current delivery, phase interleaving, and Burst Mode efficiency at idle. Use Value: Enables >90% peak efficiency at 20A, ±5% current balance reduces thermal hotspots, and 120° phase shift cuts input capacitor RMS current by 58% versus single-phase. |
Use Scenario: Main SoC power rail in fanless tablets where acoustic noise and thermal dissipation are critical constraints. IC Role / Device Role / Timing Role: Multiphase controller operating in Stage Shedding mode below 10% load to maintain constant frequency and eliminate audible switching noise. Use Value: Delivers quiet operation during light-load UI interaction while preserving fast transient response for burst workloads like video decode. |
| High Output Current DC/DC Power Supplies | Server CPU Core Power Modules |
Use Scenario: High-density 48V-to-1.2V intermediate bus converter in telecom or industrial embedded systems with strict size and efficiency targets. IC Role / Device Role / Timing Role: Fixed-frequency 3-phase controller driving discrete Si MOSFETs with optimized gate drive timing and integrated current sensing. Use Value: Achieves 92% efficiency at 30A/1.2V (VIN=12V) with reduced EMI due to interleaved switching and minimized input capacitor stress. |
Use Scenario: IMVP-III-compliant VRM for server-class processors requiring precise VID decoding, tight load-line regulation, and multi-rail sequencing. IC Role / Device Role / Timing Role: Primary core voltage controller supporting 5-bit VID, PGOOD monitoring, and RUN/SS-controlled soft-start/sequencing. Use Value: Meets Intel VRM specification for ±1% VREF accuracy and ±5% current match - ensures reliable boot and stable operation under varying CPU load profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ-T | 4-phase controller with integrated MOSFET drivers; supports 3–4 phases; 0.5V–1.5V VOUT range; lacks VID DAC but uses SMBus for programming. | Targeted at server VRMs with higher phase count and digital interface requirements; not IMVP-III VID-native. | Select ISL6322IRZ-T when digital PMBus control, 4-phase scalability, or tighter load-line regulation (±0.5%) are required over native VID compatibility. |
| TPS53632GRTAR | 3-phase controller with D-CAP+ architecture; supports 0.25V–5.5V VOUT; includes internal LDO for VDD; no PLLIN sync input. | Optimized for fast transient response in client platforms using ceramic output capacitors; lacks PLL synchronization and Stage Shedding mode. | Select TPS53632GRTAR when ultra-fast load-step response (<10µs) and simplified layout (integrated VDD LDO) outweigh need for external sync or low-noise light-load modes. |
Compared with LTC3730CG#TRPBF, ISL6322IRZ-T offers greater phase flexibility and digital control but requires external VID translation, while TPS53632GRTAR delivers superior transient performance with integrated bias supply yet sacrifices PLL synchronization and Burst Mode efficiency - making LTC3730CG#TRPBF optimal for VID-native, noise-sensitive, and externally synchronized multiphase designs.
Availability
LTC3730CG#TRPBF is available at Aetrix Electronics and suitable for high-performance notebook computers, tablet computing platforms, and high-output-current DC/DC power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC3730CG#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 acquired Linear Technology in 2017 and maintains full product continuity, documentation, and technical support for legacy Linear ICs including the LTC3730 series.
The LTC3730 belongs to Linear's PolyPhase® multiphase controller family, designed specifically for high-current, low-voltage CPU/GPU core power delivery with emphasis on thermal balancing, light-load efficiency, and IMVP compliance.
FAQ
What is the maximum supported input voltage for the LTC3730CG#TRPBF's gate drivers?
The LTC3730CG#TRPBF top-side gate drivers (TG1–TG3) support a BOOSTN voltage range of –0.3V to 38V, and switch-node (SWN) voltage range of –5V to 32V. This allows safe operation with external N-MOSFETs supplied from up to 28V input rails, as confirmed in the Typical Application schematic (Figure 1) and Absolute Maximum Ratings table.
Does the LTC3730CG#TRPBF support Intel IMVP-III voltage identification?
Yes, the LTC3730CG#TRPBF natively supports Intel IMVP-III through its 5-bit VID interface (VID0–VID4). It decodes VID codes to regulate output from 0.6V to 1.75V with ±1% reference accuracy over temperature, and includes internal 3µA pull-up on each VID pin - eliminating external bias components required by non-VID controllers.
How does the LTC3730CG#TRPBF achieve current matching between phases?
The LTC3730CG#TRPBF achieves ±5% maximum current threshold matching (IMATCH) via laser-trimmed internal current sense comparators and matched layout of SENSE+/- paths. This is verified in Electrical Characteristics Table (IMATCH parameter) and enables uniform thermal distribution across inductors and MOSFETs in 3-phase designs.
What protection features are integrated into the LTC3730CG#TRPBF?
The LTC3730CG#TRPBF integrates short-circuit shutdown with timed latch-off (defeatable via RUN/SS), overvoltage soft-latch, current foldback during overload, thermal shutdown (130°C–165°C), and input undervoltage reset (3.2V–4.5V). All protections are hardware-based with no firmware dependency, as detailed in the Protection section of the datasheet.
Can the LTC3730CG#TRPBF be synchronized to an external clock source?
Yes, the LTC3730CG#TRPBF supports external synchronization via the PLLIN pin. Its phase-locked loop aligns the rising edge of Controller 1's top-gate signal to the rising edge of the external clock applied to PLLIN, enabling coherent multiphase operation across multiple controllers or alignment to system clocks - confirmed in Functional Diagram (Figure 2) and PLL section.
LTC3730CG#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller, Intel Mobile VID
- Voltage - Input:
- 4V ~ 36V
- Number of Outputs:
- 1
- Voltage - Output:
- 0.6V ~ 1.75V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-SSOP
LTC3730CG#TRPBF FAQ
1.How can I place an order for LTC3730CG#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3730CG#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 LTC3730CG#TRPBF reliable?
The price and inventory of LTC3730CG#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3730CG#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC3730CG#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3730CG#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3730CG#TRPBF?
LTC3730CG#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3730CG#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 LTC3730CG#TRPBF?
For technical support, including LTC3730CG#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3730CG#TRPBF requirements.
6.How does Aetrix verify that LTC3730CG#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC3730CG#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 LTC3730CG#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC3730CG#TRPBF?
All LTC3730CG#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3730CG#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 LTC3730CG#TRPBF part is unused and in its original packaging.
Return procedure for LTC3730CG#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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