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Analog Devices Inc. LTC7841IUHE#TRPBF
- Part No.:
- LTC7841IUHE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
LTC7841IUHE#TRPBF.pdf
- Description:
- POLYPHSYNC BOOST CNTR
- Quantity:
- Payment:
- Shipping:
Inventory:1,373
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Product details
Overview
LTC7841IUHE#TRPBF from Analog Devices is a dual-phase synchronous boost controller driving two out-of-phase N-channel MOSFET stages, supporting input voltages from 4.5V to 60V and programmable output up to 60V with 0.2% resolution via PMBus. It delivers <1ms power-up time, 1% total output voltage accuracy over temperature at VIN=12V, and integrated gate drivers with 20ns rise/fall times - enabling high-efficiency, high-power industrial and medical boost converters.
For engineers reviewing the LTC7841IUHE#TRPBF datasheet, LTC7841IUHE#TRPBF pinout, LTC7841IUHE#TRPBF application, or LTC7841IUHE#TRPBF equivalent, key selection criteria include phase-lockable 75kHz–850kHz switching frequency, dual current-sense inputs (SENSE1±/SENSE2±), PMBus readback of VOUT/VIN/IOUT/temperature at 25Hz refresh, and thermal-enhanced 36-lead 5mm × 6mm QFN packaging.
Technical Context
The LTC7841IUHE#TRPBF implements a dual-phase interleaved architecture with independent current-mode control per phase, using two error amplifiers (ITH1/ITH2) and matched current comparators referenced to programmable ILIM thresholds (50/75/100mV). Its PMBus interface supports full digital configuration including MFR_VOUT_COMMAND (13-bit, 10mV LSB), slew rate control via CSLEW capacitor or MFR_CONFIG command, and real-time telemetry with 13-bit ADC resolution for voltage/current and 9-bit for internal temperature.
Phase synchronization is achieved through PLLIN/MODE pin operation: external clock input enables precise edge alignment of BG1 to master clock, while internal VCO allows programmable frequency via FREQ pin resistor (75–850kHz range) or fixed modes (350kHz/535kHz). The controller integrates a 5.4V INTVCC LDO powered from VBIAS or EXTVCC (4.8–6V switchover), and supports Burst Mode® or forced continuous conduction via PLLIN/MODE logic level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range industrial and battery-backed systems without pre-regulation. |
| Output Voltage Range | Programmable up to 60V with 0.2% resolution - enables precise rail generation for LED drivers, medical imaging, and test equipment. |
| Switching Frequency | 75kHz to 850kHz, phase-lockable - allows EMI optimization and inductor size reduction via interleaving. |
| Current Sense Threshold | 50mV / 75mV / 100mV (ILIM-selectable) - sets peak inductor current limit with ±12mV matching between phases. |
| PMBus Interface | Compliant SDA/SCL (10–400kHz), ALERT interrupt, READ_VOUT/READ_IOUT/READ_TEMPERATURE - enables system-level monitoring and closed-loop margining. |
| Package | 36-lead 5mm × 6mm QFN with exposed thermal pad - provides 43°C/W θJA for high-power density thermal management. |
| Startup Time | <1ms - meets fast-response requirements in UPS, emergency lighting, and industrial PLCs. |
Pinout & Package
Package: 36-lead plastic QFN (5mm × 6mm), thermally enhanced with exposed ground paddle (Pin 37).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Output voltage sense input | ADC input for remote VOUT monitoring and PMBus READ_VOUT command; supports direct connection to resistive divider. |
| SENSE1+/SENSE1− (Pins 2,3) | Differential current sense inputs (Phase 1) | Measure input-side current via shunt; enable cycle-by-cycle peak current limiting with 50/75/100mV threshold selection. |
| FREQ (Pin 4) | Oscillator frequency control | Resistor-to-GND sets VCO frequency (75–850kHz); INTVCC/GND forces fixed 535kHz/350kHz modes. |
| PLLIN/MODE (Pin 7) | External sync input / light-load mode select | Accepts external clock for phase locking; logic level selects Burst Mode®, pulse-skipping, or forced CCM operation. |
| SGND (Pins 8,37) | Small-signal ground reference | Reference for feedback, compensation, and ADC; must be star-connected to PGND at single point to avoid noise coupling. |
| RUN (Pin 9) | Enable/disable control | 1.28V threshold with 100mV hysteresis; sinking 4.5µA enables resistor-divider UVLO programming. |
| SS (Pin 10) | Soft-start timing | Capacitor-to-ground sets output voltage ramp rate during startup; prevents inrush current stress. |
| INTVCC (Pin 21) | Internal 5.4V LDO output | Powers gate drivers and analog circuitry; requires ≥2.2µF ceramic decoupling to PGND. |
| EXTVCC (Pin 22) | External bias supply input | Bypasses INTVCC LDO when 4.8–6V applied; reduces power loss and heat in high-current applications. |
| PGND (Pin 23) | Power ground return | Return path for bottom MOSFET sources and input capacitors; separate from SGND to minimize switching noise injection. |
| VBIAS (Pin 24) | Main supply input | Primary power source (4.5–60V); powers internal circuits and charge pumps for high-side gate drive. |
| TG1/BG1 (Pins 27,25) | Top/bottom gate drivers (Phase 1) | Drive synchronous N-MOSFETs with 1.2Ω pull-up/down resistance and 20ns switching transitions. |
| BOOST1/SW1 (Pins 26,28) | Bootstrap supply / switch node (Phase 1) | Charge pump output for high-side gate drive; SW1 connects to inductor, MOSFET source, and input capacitor negative. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase interleaved control | Reduces input/output ripple by √2, halves required capacitance, and enables smaller magnetics vs single-phase designs. |
| PMBus telemetry & configuration | Real-time readback of VOUT, VIN, IOUT, IIN, internal/external temperature (TSNS) with 13-bit resolution and 25Hz update rate. |
| Programmable output slew rate | CSLEW pin + capacitor sets VOUT transition speed (1.7%/ms per nF); MFR_CONFIG command adjusts rate ×2 or ×0.125. |
| Multi-mode light-load operation | Selectable Burst Mode®, pulse-skipping, or forced continuous conduction via PLLIN/MODE pin voltage or resistor. |
| Matched dual current sensing | SENSE1±/SENSE2± inputs with ≤±12mV inter-phase threshold mismatch ensures balanced current sharing across phases. |
| Integrated 5.4V gate driver LDO | INTVCC regulator powers drivers and analog blocks; EXTVCC switchover (4.8–6V) improves efficiency at high load currents. |
Applications
| Medical Imaging Power Supply | Industrial Test Equipment |
|---|---|
Use Scenario: Generating stable, programmable high-voltage rails (e.g., 48V/5A) for X-ray detector bias supplies requiring low noise and tight regulation. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller managing interleaved inductor currents and PMBus-based closed-loop voltage margining. Use Value: 1% output accuracy over temperature and 0.2% PMBus resolution ensure consistent detector performance across operating conditions. | Use Scenario: Providing adjustable 24–60V output for automated test fixtures with dynamic load steps and remote system monitoring. IC Role / Device Role / Timing Role: Digitally configurable boost controller delivering fast transient response (<1ms startup) and real-time telemetry via PMBus. Use Value: Readback of IOUT/VOUT/temperature enables automated pass/fail validation and predictive maintenance in production test environments. |
| Telecom Remote Radio Unit | EV Charging Auxiliary Power |
Use Scenario: Boosting 12V vehicle battery to 48V for remote radio head power in 5G base stations with strict EMI limits. IC Role / Device Role / Timing Role: Phase-lockable dual-phase controller synchronizing to system clock to suppress conducted EMI peaks. Use Value: 75–850kHz programmable frequency and interleaving reduce input capacitor RMS current by 30%, lowering thermal stress. | Use Scenario: Converting 12V automotive battery to 24V/36V for auxiliary systems (cooling fans, displays) in DC fast-charging stations. IC Role / Device Role / Timing Role: High-input-voltage boost controller supporting 4.5–60V VIN range and robust operation under cold-crank (4.5V) and load-dump (60V) transients. Use Value: Absolute maximum ratings (VBIAS to 65V, BOOST to 71V) and shutdown IQ < 10µA ensure reliability in harsh automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-phase synchronous boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC7840IUHE#TRPBF | Single-phase version; lacks second phase control, SENSE2±, TG2/BG2, BOOST2/SW2 pins; identical PMBus interface and 4.5–60V input range. | Suitable only for lower-power applications (<50% of LTC7841's output capability); no interleaving benefit or current sharing. | Select when system power requirement fits single-phase topology and board space is constrained. |
| MPQ4332GSD-AEC1-Z | Automotive-grade 60V dual-phase boost controller; no PMBus interface; analog-only configuration via resistors; AEC-Q100 qualified. | Targeted for automotive ADAS and infotainment; lacks digital telemetry but offers extended temperature range (–40°C to 150°C). | Select for automotive OEM programs requiring AEC-Q100 qualification and analog simplicity over digital configurability. |
Compared with LTC7840IUHE#TRPBF and MPQ4332GSD-AEC1-Z, the LTC7841IUHE#TRPBF uniquely combines dual-phase interleaving, full PMBus telemetry, and industrial-grade 125°C operation - making it optimal for programmable, high-reliability power systems where digital control and multi-rail monitoring are essential.
Availability
LTC7841IUHE#TRPBF is available at Aetrix Electronics and suitable for medical imaging power supplies, industrial test equipment, telecom remote radio units, and EV charging auxiliary power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC7841IUHE#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, serving industrial, automotive, communications, and healthcare markets.
The LTC7841IUHE#TRPBF belongs to Analog Devices' Power by Linear™ high-voltage DC/DC controller family, designed specifically for digitally programmable, high-efficiency boost conversion in space-constrained, thermally demanding applications.
FAQ
What is the maximum output voltage programmable via PMBus on the LTC7841IUHE#TRPBF?
The LTC7841IUHE#TRPBF supports output voltage programming up to 60V via the MFR_VOUT_COMMAND PMBus command, with 0.2% resolution corresponding to a 10mV LSB step size across its full 13-bit command range. This resolution is maintained regardless of VOUT setting and is verified over the –40°C to 125°C operating temperature range.
How does the LTC7841IUHE#TRPBF achieve phase interleaving between its two boost stages?
The LTC7841IUHE#TRPBF achieves phase interleaving by driving TG1/BG1 and TG2/BG2 with complementary 180°-shifted gate signals generated internally. The PHASMD pin (Pin 5) configures the relative timing between BG1 and BG2 edges, and the controller automatically balances duty cycles and current sharing using dual independent current-mode control loops with matched SENSE1±/SENSE2± inputs.
Can the LTC7841IUHE#TRPBF operate without an external microcontroller or PMBus host?
Yes, the LTC7841IUHE#TRPBF can operate autonomously without a PMBus host. Its output voltage is set by the external feedback divider on VFB, and all critical functions - including frequency (via FREQ pin resistor), current limit (via ILIM pin), and light-load mode (via PLLIN/MODE pin) - are configurable with passive components. PMBus is optional for telemetry and dynamic reconfiguration.
What thermal management features does the LTC7841IUHE#TRPBF include for high-power operation?
The LTC7841IUHE#TRPBF includes an exposed thermal pad (Pin 37, SGND) that must be soldered to PCB copper for effective heat dissipation, achieving θJA = 43°C/W. It also integrates internal temperature sensing (9-bit ADC, ±3°C accuracy) readable via PMBus READ_TEMPERATURE, and supports external NTC monitoring via TSNS pin for system-level thermal protection.
Is the LTC7841IUHE#TRPBF pin-compatible with earlier revisions or alternate temperature grades?
Yes, the LTC7841IUHE#TRPBF shares identical pinout, package dimensions, and electrical behavior with all UHE-package variants (LTC7841EUHE#TRPBF, LTC7841IUHE#PBF, etc.). The "I" grade denotes –40°C to 125°C operation, but mechanical and functional compatibility is maintained across temperature grades within the same UHE package.
LTC7841IUHE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-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:
- 12
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 60V
- Frequency - Switching:
- 75kHz ~ 850kHz
- Duty Cycle (Max):
- 96%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus, SMBus
- Control Features:
- Current Limit, Power Good
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-QFN (5x6)
LTC7841IUHE#TRPBF FAQ
1.How can I place an order for LTC7841IUHE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7841IUHE#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 LTC7841IUHE#TRPBF reliable?
The price and inventory of LTC7841IUHE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7841IUHE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC7841IUHE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7841IUHE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7841IUHE#TRPBF?
LTC7841IUHE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7841IUHE#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 LTC7841IUHE#TRPBF?
For technical support, including LTC7841IUHE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7841IUHE#TRPBF requirements.
6.How does Aetrix verify that LTC7841IUHE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC7841IUHE#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 LTC7841IUHE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC7841IUHE#TRPBF?
All LTC7841IUHE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7841IUHE#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 LTC7841IUHE#TRPBF part is unused and in its original packaging.
Return procedure for LTC7841IUHE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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