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Analog Devices Inc. LTC7841EUHE#PBF
- Part No.:
- LTC7841EUHE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
LTC7841EUHE#PBF.pdf
- Description:
- POLYPHSYNC BOOST CNTR
- Quantity:
- Payment:
- Shipping:
Inventory:2,429
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Product details
Overview
LTC7841EUHE#PBF from Analog Devices is a dual-phase synchronous boost controller driving two N-channel MOSFET stages out-of-phase, supporting input voltages from 4.5V to 60V and programmable output up to 60V with 0.2% resolution via PMBus. It delivers 1% total output voltage accuracy over temperature at VIN = 12V and features phase-lockable switching frequency from 75kHz to 850kHz. This device enables high-efficiency, high-power boost conversion in medical and industrial power systems.
For engineers reviewing the LTC7841EUHE#PBF datasheet, LTC7841EUHE#PBF pinout, LTC7841EUHE#PBF application, or LTC7841EUHE#PBF equivalent, key selection criteria include its dual-phase current-mode control architecture, PMBus-based real-time telemetry (VOUT, IOUT, VIN, temperature), <1ms power-up time, and thermally enhanced 5mm × 6mm QFN-36 package with exposed ground pad.
Technical Context
The LTC7841EUHE#PBF implements a dual-phase, current-mode synchronous boost topology with independent per-phase current sensing (SENSE1+/–, SENSE2+/–) and out-of-phase gate drive (TG1/BG1, TG2/BG2) to reduce input/output ripple and enable smaller passive components. Its internal 5.4V LDO powers gate drivers from VBIAS or EXTVCC, and the integrated PMBus interface supports full configuration, fault reporting, and 25Hz telemetry refresh.
Control logic includes selectable light-load modes (Burst Mode®, pulse-skipping, forced continuous) via PLLIN/MODE, programmable slew rate (CSLEW), and precise output margining. The device uses a transconductance error amplifier (gm = 2 mmho) with ITH as compensation node and supports external synchronization (PLLIN/MODE) or internal VCO (FREQ pin) with 75–850kHz range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide-range industrial and medical DC inputs including 12V, 24V, and 48V bus architectures. |
| Output Voltage Range | Up to 60V with 0.2% resolution - enables precise, digitally adjustable high-voltage rails for LED drivers, test equipment, and HV bias supplies. |
| Switching Frequency | 75kHz to 850kHz - configurable via FREQ pin or external clock; allows optimization of efficiency vs. size for inductors and capacitors. |
| Output Voltage Accuracy | ±1% over temperature at VIN = 12V - ensures stable regulation under thermal stress without external calibration. |
| PMBus Interface | Compliant SMBus v2.0 - provides readback of VOUT, IOUT, VIN, temperature (internal/external), fault status, and full configuration via LTpowerPlay®. |
| Package | 36-lead 5mm × 6mm QFN with exposed thermal pad - achieves θJA = 43°C/W for high-power density thermal management. |
| Shutdown Current | <10µA - enables ultra-low quiescent power during system standby or fault shutdown. |
Pinout & Package
Package: 36-lead (5mm × 6mm) plastic QFN with exposed paddle (Pin 37 = SGND/PGND), rated for –40°C to +125°C operating junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (24) | Main supply input | Accepts 4.5V–60V input; powers internal circuitry and serves as reference for BOOST1/2 charge pumps. |
| TG1/TG2 (27,18) | Top gate drivers | Drive gates of synchronous N-MOSFETs; each supports 1.2Ω pull-up/down and 20ns rise/fall times. |
| BG1/BG2 (25,20) | Bottom gate drivers | Drive gates of main N-MOSFETs; support up to 96% duty cycle and 30ns switch-on delay. |
| SENSE1+/–, SENSE2+/– (2,3,12,11) | Differential current sense inputs | Enable per-phase peak current limiting; threshold programmable to 50/75/100mV via ILIM pin. |
| VOUT (1), VFB (13) | Output voltage sensing | VOUT feeds internal ADC for PMBus readback; VFB connects to external resistive divider for feedback loop control. |
| SCL/SDA/ALERT (30,29,31) | PMBus interface signals | Support 10–400kHz SMBus operation; ALERT is open-drain fault indicator with 0.4V low-level under 1mA sink. |
| PGOOD (16) | Power-good monitor | Open-drain output asserts low when VOUT deviates >±10% from setpoint for ≥45µs - enables system sequencing and fault isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase interleaved control | Reduces input/output capacitor RMS current by ~70% vs. single-phase, enabling smaller bulk capacitance and lower ESR requirements. |
| PMBus telemetry & configuration | Real-time readback of VOUT, IOUT, VIN, internal/external temperature at 25Hz; supports MFR_VOUT_COMMAND, READ_IOUT, and fault logging. |
| Programmable output slew rate | Configurable via CSLEW capacitor (1.7%/ms per nF) or MFR_CONFIG command - prevents output overshoot during dynamic voltage changes. |
| Three light-load operating modes | Burst Mode® (low IQ), pulse-skipping, or forced continuous - selectable via PLLIN/MODE pin to optimize efficiency across 0.01A–10A load range. |
| Robust protection suite | Includes overvoltage (OV) trip at 1.32V on VFB, PGOOD with ±10% hysteresis, and thermal shutdown at TJ = 150°C - ensures safe operation under fault conditions. |
Applications
| Medical Imaging Power Supply | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Generating stable 48V/5A rail from 24V DC bus for X-ray detector bias and sensor amplifiers. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller managing interleaved gate timing, current sensing, and PMBus telemetry. Use Value: Achieves >95% efficiency at full load while maintaining ±1% output accuracy over –40°C to +85°C ambient - critical for diagnostic signal integrity. |
Use Scenario: Providing isolated 36V auxiliary supply for analog input conditioning and relay drivers in modular automation controllers. IC Role / Device Role / Timing Role: Programmable boost controller with digital margining and real-time current monitoring via PMBus. Use Value: Enables remote firmware-adjustable output voltage and predictive maintenance through IOUT/VIN trend logging - reduces field service calls. |
| Test & Measurement Equipment | High-Voltage LED Driver |
|
Use Scenario: Precision 60V/2A output for semiconductor parameter analyzers requiring low-noise, digitally controlled bias. IC Role / Device Role / Timing Role: High-resolution (0.2%) PMBus-programmable boost controller with <1ms startup and soft-start ramp control. Use Value: Eliminates manual potentiometer tuning; supports automated calibration sequences via LTpowerPlay® GUI and USB-to-PMBus adapter. |
Use Scenario: Driving 40V-series LED strings in architectural lighting with dimming via analog voltage or PMBus commands. IC Role / Device Role / Timing Role: Synchronous boost controller with programmable slew rate (CSLEW) and fast transient response (<200µs recovery). Use Value: Prevents LED current overshoot during dimming transitions; maintains constant current accuracy within ±2% using internal current-sense ADC. |
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 |
|---|---|---|---|
| LTC3891EUHF#PBF | Single-phase, no PMBus; 4.5V–60V input, 0.8V–60V output; lacks telemetry, phase-lock, and dual-current sensing. | Suitable for cost-sensitive, non-telemetry designs where dual-phase ripple reduction is not required. | Select when digital monitoring, multi-phase current sharing, or precise output margining are unnecessary. |
| MPQ4332GQ-AEC1-P | Automotive-grade single-phase boost; 4.5V–60V input; no PMBus; integrates MOSFETs; fixed 500kHz switching. | Targeted at automotive infotainment and ADAS power rails; lacks programmability, telemetry, and thermal monitoring. | Choose only for AEC-Q100-compliant automotive applications where integration and qualification outweigh configurability needs. |
Compared with LTC3891EUHF#PBF and MPQ4332GQ-AEC1-P, the LTC7841EUHE#PBF uniquely combines dual-phase interleaving, full PMBus telemetry, and 0.2% output resolution - making it the only option for high-accuracy, remotely managed, high-power boost systems in medical and industrial settings.
Availability
LTC7841EUHE#PBF is available at Aetrix Electronics and suitable for medical imaging power supplies, industrial PLC I/O modules, test equipment bias rails, and high-voltage LED drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LTC7841EUHE#PBF 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 LTC7841EUHE#PBF belongs to Analog Devices' Power by Linear™ digital power controller family, designed specifically for high-efficiency, digitally managed, multiphase DC/DC conversion in demanding industrial and medical applications.
FAQ
What is the maximum output voltage supported by the LTC7841EUHE#PBF?
The LTC7841EUHE#PBF supports programmable output voltage up to 60V with 0.2% resolution via its PMBus interface. This capability is enabled by its internal 13-bit DAC and high-precision feedback architecture, allowing fine-grained adjustment for applications such as high-voltage bias supplies and LED drivers. The device maintains ±1% total unadjusted error over temperature at VIN = 12V.
Does the LTC7841EUHE#PBF support external synchronization of switching frequency?
Yes, the LTC7841EUHE#PBF supports external synchronization via the PLLIN/MODE pin. When an external clock is applied, the internal phase-locked loop forces the rising edge of BG1 to align with the rising edge of that clock. This feature enables deterministic timing across multiple converters in synchronized power systems - essential for EMI reduction and coordinated sequencing in complex industrial power architectures.
How does the LTC7841EUHE#PBF handle current sensing for dual-phase operation?
The LTC7841EUHE#PBF provides independent differential current sense inputs for each phase: SENSE1+/– (Pins 2,3) and SENSE2+/– (Pins 12,11). Each pair supports programmable peak current thresholds (50mV, 75mV, or 100mV) via the ILIM pin. Matching between phases is guaranteed to ±12mV, ensuring balanced current sharing and stable interleaved operation without external current-sharing circuitry.
What thermal management features does the LTC7841EUHE#PBF include?
The LTC7841EUHE#PBF integrates internal temperature sensing with ±3°C accuracy and supports external NTC monitoring via the TSNS pin. Its 5mm × 6mm QFN package includes an exposed thermal pad (Pin 37) soldered to PCB ground, achieving θJA = 43°C/W. Thermal shutdown activates at TJ = 150°C, and the device reports die temperature via PMBus READ_TEMPERATURE_1 command - enabling closed-loop thermal derating in safety-critical systems.
Can the LTC7841EUHE#PBF operate without a PMBus host controller?
Yes, the LTC7841EUHE#PBF operates fully autonomously without PMBus communication. Default output voltage is set by the external VFB resistive divider; all protection functions (OV, UV, thermal), soft-start, and light-load mode selection remain active. PMBus is optional for telemetry, dynamic reconfiguration, and advanced diagnostics - making the LTC7841EUHE#PBF usable in both digitally managed and standalone analog power designs.
LTC7841EUHE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 36-WFQFN Exposed Pad
- Packaging:
- Tube
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-QFN (5x6)
LTC7841EUHE#PBF FAQ
1.How can I place an order for LTC7841EUHE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7841EUHE#PBF 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 LTC7841EUHE#PBF reliable?
The price and inventory of LTC7841EUHE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7841EUHE#PBF is usually 5 days.
3.What payment methods are accepted for LTC7841EUHE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7841EUHE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7841EUHE#PBF?
LTC7841EUHE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7841EUHE#PBF 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 LTC7841EUHE#PBF?
For technical support, including LTC7841EUHE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7841EUHE#PBF requirements.
6.How does Aetrix verify that LTC7841EUHE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC7841EUHE#PBF 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 LTC7841EUHE#PBF meets industry standards.
7.What is the process for return or replacement of LTC7841EUHE#PBF?
All LTC7841EUHE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7841EUHE#PBF, 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 LTC7841EUHE#PBF part is unused and in its original packaging.
Return procedure for LTC7841EUHE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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