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Analog Devices Inc. LTC7806RUFDM#TRPBF
- Part No.:
- LTC7806RUFDM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
LTC7806RUFDM#TRPBF.pdf
- Description:
- 2-Phase Sync Boost CTL, 40V, 3M
- Quantity:
- Payment:
- Shipping:
Inventory:1,081
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Product details
Overview
LTC7806RUFDM#TRPBF from Analog Devices is a 40V, 2-phase synchronous boost controller driving two N-channel MOSFETs in 180° out-of-phase operation. It delivers up to 40V output from 4.5V–40V input (down to 1V post-startup), features 18μA no-load quiescent current, 3MHz programmable switching frequency, and PassThru™ 100% duty cycle capability-enabling high-efficiency automotive start-stop power management.
For engineers reviewing the LTC7806RUFDM#TRPBF datasheet, LTC7806RUFDM#TRPBF pinout, LTC7806RUFDM#TRPBF application, or LTC7806RUFDM#TRPBF equivalent, key selection criteria include phase-lockable 100kHz–3MHz operation, dual-channel RSENSE/DCR current sensing, OPTI-LOOP® compensation for wide ESR/output capacitance tolerance, AEC-Q100 qualification, and 28-lead 4mm × 5mm QFN thermal performance with exposed GND pad.
Technical Context
The LTC7806RUFDM#TRPBF implements constant-frequency peak current mode control with independent per-channel current comparators (SENSE1+/–, SENSE2+/–) and synchronized 180° phase offset. Its dual-stage architecture reduces input/output ripple current by ~70% versus single-phase equivalents, enabling smaller bulk capacitors and lower EMI.
It integrates dual floating gate drivers (TG1/BG1, TG2/BG2) with 1.2Ω pull-up/0.6Ω pull-down resistance, internal 5.4V INTVCC LDO, EXTVCC switchover at 4.65V, and precision 1.2V feedback reference with ±0.5% initial accuracy over temperature. PassThru™ operation is enabled via OVMODE pin configuration and supports seamless VIN-to-VOUT transition above 24V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V operating; sustains regulation down to 1V after startup when biased from VOUT |
| Output Voltage Range | 1.2V to 40V adjustable; fixed 24V/28V options via VPRG pin |
| Switching Frequency | Programmable 100kHz–3MHz; phase-lockable to external clock (0.1–3MHz) |
| No-Load Quiescent Current | 18μA typical - extends battery runtime in always-on automotive systems |
| Shutdown IQ | 1.5μA - enables ultra-low-power system sleep states |
| Current Sense Threshold | Selectable 25mV/50mV/75mV via ILIM pin - supports high-accuracy RSENSE or DCR sensing |
| Feedback Reference | Precision 1.200V ±0.5% - ensures stable output regulation across temperature and load |
| Package Thermal Resistance | θJA = 43°C/W - requires exposed pad soldering to PCB GND for rated 150°C junction operation |
Pinout & Package
28-lead 4mm × 5mm plastic QFN (UFDM) with exposed thermal pad (Pin 29 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SENSE1+, SENSE2+ | Differential current sense positive inputs | Set channel-specific current trip threshold with ITH voltage; source bias current above 3.2V to reduce VBIAS load |
| SENSE1–, SENSE2– | Differential current sense negative inputs | Complete current comparator path; matched to ±3.3mV inter-channel offset |
| TG1, TG2 | Top-side N-MOSFET gate drivers | Floating outputs swinging from SW node to (SW + INTVCC); drive synchronous rectifiers |
| BG1, BG2 | Bottom-side N-MOSFET gate drivers | GND-referenced outputs (0V to INTVCC); control main boost switches |
| BOOST1, BOOST2 | Bootstrap supply nodes | Charge pump outputs (INTVCC to VOUT+INTVCC); require external bootstrap caps and Schottky diodes |
| VFB | Output voltage feedback input | Regulated to 1.2V reference; connects to resistor divider or direct to VOUT for fixed outputs |
| PGOOD | Open-drain power-good indicator | Asserts low when VFB deviates >±11% from regulation point - enables system sequencing |
| PLLIN/SPREAD | External sync input / spread-spectrum enable | Accepts 0.1–3MHz clock for phase locking; tied to INTVCC for dithering, GND to disable |
Key Features
| Feature | Design Value |
|---|---|
| 2-Phase interleaved operation | Reduces RMS input/output ripple current by ~70%, cutting capacitor size and EMI filter requirements |
| PassThru™ 100% duty cycle | Enables direct VIN-to-VOUT conduction above 24V - eliminates switching loss during high-input conditions |
| OPTI-LOOP® compensation | Allows stable loop response across wide range of output capacitor ESR (0.5mΩ–100mΩ) and capacitance (10μF–10,000μF) |
| Selectably light-load modes | Burst Mode®, pulse-skipping, or forced continuous - configurable via MODE pin for efficiency vs. noise trade-off |
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +150°C junction operation - validated for automotive under-hood applications |
| Inductor current monitor (IMON) | Analog voltage output (0.4V–1.4V) proportional to Channel 2 inductor current - enables real-time current telemetry |
Applications
| Automotive Start-Stop Systems | Audio Power Amplifier Supplies |
|---|---|
Use Scenario: Maintaining stable 24V rail during engine cranking when battery drops to 6V–8V. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller regulating output from low VIN while minimizing input ripple and thermal stress. Use Value: PassThru™ mode eliminates switching loss when VIN > 24V; 18μA quiescent current preserves battery during extended parking. |
Use Scenario: Generating clean, low-noise 36V–40V rails for Class-D audio amplifiers in premium vehicle infotainment. IC Role / Device Role / Timing Role: High-frequency (2.25MHz) 2-phase boost controller reducing EMI and enabling compact magnetics. Use Value: 3MHz capability allows >1MHz switching - avoids AM band interference; OPTI-LOOP® ensures stability with ceramic output caps. |
| Industrial 24V Bus Boost Converters | Medical Imaging Power Supplies |
Use Scenario: Stepping up 12V/24V industrial bus to 36V–40V for motor drives or PLC I/O modules. IC Role / Device Role / Timing Role: Robust 40V-input controller with AEC-Q100 reliability margin and integrated fault reporting (PGOOD, overtemperature). Use Value: Dual-channel current monitoring supports redundant current limiting; 150°C junction rating enables operation in sealed enclosures. |
Use Scenario: Providing tightly regulated, low-noise high-voltage bias for X-ray detector front-ends or ultrasound transducer drivers. IC Role / Device Role / Timing Role: Precision 1.2V reference and low-output-impedance INTVCC LDO ensure stable analog supply generation. Use Value: <100μVPP output noise (typ.) and ±0.5% VREF accuracy support sub-millivolt signal integrity in imaging chains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7804IUFD#TRPBF | Single-phase, 40V, 3MHz boost controller; lacks 2-phase interleaving and IMON output | Suitable for lower-current (<10A) designs where input/output ripple reduction is less critical | Choose when cost and board area are prioritized over ripple suppression and telemetry capability |
| MPQ8633BGLE-Z | Integrated 2-phase 40V boost converter (MOSFETs included); fixed 2.1MHz freq; no PassThru or VPRG programming | Targeted at space-constrained consumer/industrial apps needing simplified BOM, not automotive-grade reliability | Prefer when full integration and reduced layout complexity outweigh need for AEC-Q100, programmability, and diagnostic features |
Compared with LTC7806RUFDM#TRPBF, LTC7804IUFD#TRPBF sacrifices interleaving benefits and current monitoring but reduces component count; MPQ8633BGLE-Z trades configurability and automotive qualification for monolithic simplicity and faster time-to-market in non-safety-critical systems.
Availability
LTC7806RUFDM#TRPBF is available at Aetrix Electronics and suitable for automotive start-stop systems, audio amplifier power supplies, industrial 24V bus boost converters, and medical imaging power supplies requiring stable component supply with long-term lifecycle assurance.
Supply support for LTC7806RUFDM#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision, industrial, automotive, and communications markets.
The LTC7806 belongs to Analog Devices' Power by Linear™ high-efficiency DC/DC controller family, designed specifically for demanding automotive and industrial boost applications requiring ultra-low IQ, high-frequency operation, and AEC-Q100 reliability.
FAQ
What is the maximum junction temperature rating for the LTC7806RUFDM#TRPBF?
The LTC7806RUFDM#TRPBF is rated for –40°C to +150°C operating junction temperature and is qualified to AEC-Q100 Grade 1 standards. Its θJA of 43°C/W requires proper thermal design-including soldering the exposed pad (Pin 29) to a PCB ground plane-to maintain safe operation at full load in high-ambient environments.
Does the LTC7806RUFDM#TRPBF support both RSENSE and inductor DCR current sensing?
Yes, the LTC7806RUFDM#TRPBF supports both methods. SENSE1+/– and SENSE2+/– pins accept differential voltage signals from either discrete sense resistors or inductor DCR networks. The ILIM pin selects full-scale thresholds of 25mV, 50mV, or 75mV to optimize SNR for each sensing approach.
How does PassThru™ operation function in the LTC7806RUFDM#TRPBF?
PassThru™ enables 100% duty cycle in the LTC7806RUFDM#TRPBF when VIN exceeds the regulated output (e.g., VIN > 24V). With OVMODE grounded, the top MOSFETs remain continuously on, bypassing switching losses. This maintains output regulation without conversion loss-critical for automotive battery transients and cold-crank recovery.
Can the LTC7806RUFDM#TRPBF be synchronized to an external clock?
Yes, the LTC7806RUFDM#TRPBF supports external synchronization via the PLLIN/SPREAD pin. When driven by a 0.1–3MHz clock, it locks the rising edge of BG1 to the external clock's rising edge. Synchronization enables deterministic EMI reduction and multi-phase coordination across multiple LTC7806RUFDM#TRPBF controllers.
What are the key differences between the LTC7806RUFDM#TRPBF and the industrial-grade LTC7806IUFDM#TRPBF?
The LTC7806RUFDM#TRPBF is rated for –40°C to +150°C junction operation and carries AEC-Q100 qualification, while the LTC7806IUFDM#TRPBF is specified for –40°C to +125°C and lacks automotive qualification. Both share identical pinout, electrical specs, and feature set-but only the R-grade meets automotive under-hood thermal and reliability requirements.
LTC7806RUFDM#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Number of Outputs:
- 1
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 40V
- Frequency - Switching:
- 100kHz ~ 3MHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Frequency Control, Power Good, Soft Start
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 28-QFN (4x5)
LTC7806RUFDM#TRPBF FAQ
1.How can I place an order for LTC7806RUFDM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7806RUFDM#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 LTC7806RUFDM#TRPBF reliable?
The price and inventory of LTC7806RUFDM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7806RUFDM#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7806RUFDM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7806RUFDM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7806RUFDM#TRPBF?
LTC7806RUFDM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7806RUFDM#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 LTC7806RUFDM#TRPBF?
For technical support, including LTC7806RUFDM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7806RUFDM#TRPBF requirements.
6.How does Aetrix verify that LTC7806RUFDM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7806RUFDM#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 LTC7806RUFDM#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7806RUFDM#TRPBF?
All LTC7806RUFDM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7806RUFDM#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 LTC7806RUFDM#TRPBF part is unused and in its original packaging.
Return procedure for LTC7806RUFDM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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