My Inquiry
My Account
Analog Devices Inc. LTC7841IUHE#PBF
- Part No.:
- LTC7841IUHE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 36-WFQFN Exposed Pad
- Datasheet:
-
LTC7841IUHE#PBF.pdf
- Description:
- POLYPHSYNC BOOST CNTR
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC7841IUHE#PBF 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, phase-lockable frequency (75–850kHz), and integrated current/voltage/temperature telemetry for high-power industrial and medical boost applications.
For engineers reviewing the LTC7841IUHE#PBF datasheet, LTC7841IUHE#PBF pinout, LTC7841IUHE#PBF application, or LTC7841IUHE#PBF equivalent, key selection criteria include its dual-phase synchronous architecture, PMBus-compliant telemetry (READ_VOUT, READ_IIN, READ_TEMPERATURE), 36-lead 5mm × 6mm QFN package with exposed thermal pad, and support for Burst Mode® and forced continuous operation across –40°C to 125°C.
Technical Context
The LTC7841IUHE#PBF implements a dual-phase interleaved synchronous boost topology with independent current-mode control per phase, using external N-channel MOSFETs driven by integrated gate drivers with 20ns rise/fall times and 1.2Ω pull-up/down resistance. Its PMBus interface enables real-time configuration of VOUT_COMMAND (0–99.8%), slew rate (via CSLEW pin or MFR_CONFIG), and fault monitoring including overvoltage (1.296–1.344V trip) and PGOOD with ±10% window.
It features a programmable oscillator (75–850kHz) with PLL synchronization capability via PLLIN/MODE, internal 5.4V LDO (INTVCC) powered from VBIAS or EXTVCC, and dual differential current sense inputs (SENSE1±/SENSE2±) supporting peak current thresholds of 50/75/100mV selectable via ILIM pin. The device supports three light-load modes-Burst Mode®, pulse-skipping, and forced continuous-controlled by PLLIN/MODE voltage level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - Enables direct integration into wide-input industrial power rails without pre-regulation. |
| Output Voltage Range | Up to 60V with 0.2% resolution - Programmable via PMBus MFR_VOUT_COMMAND for precise system-level voltage scaling. |
| Switching Frequency | 75kHz to 850kHz - Phase-lockable to external clock; supports high-density magnetics and EMI optimization. |
| Current Sense Threshold | 50mV / 75mV / 100mV - Selectable via ILIM pin grounding, floating, or tying to INTVCC for flexible current limit tuning. |
| Telemetry Resolution | 13-bit VOUT/IIN/VIN readback (10mV LSB), 9-bit internal temperature (1°C LSB) - Enables accurate closed-loop monitoring and diagnostics. |
| Startup Time | <1ms - Measured from RUN >1.38V and INTVCC >4.3V to first TG/BG switching - critical for fast-recovery backup systems. |
| Operating Temperature | –40°C to 125°C - Fully specified and guaranteed for industrial and medical environments without derating. |
Pinout & Package
Package: 36-lead (5mm × 6mm) plastic QFN with exposed thermal pad (Pin 37 = SGND/PGND), θJA = 43°C/W. Requires soldering of exposed pad to PCB for thermal performance and signal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VBIAS (24) | Main supply input | Accepts 4.5–60V; powers internal circuitry and provides bias for gate drivers - may be tied to VIN or VOUT depending on topology. |
| TG1/TG2 (27,18) | Top gate drivers | Drive gates of synchronous N-MOSFETs; each has 1.2Ω pull-up/down and 20ns switching transitions. |
| BG1/BG2 (25,20) | Bottom gate drivers | Drive gates of main N-MOSFETs; supports up to 96% duty cycle for high step-up ratios. |
| SENSE1+/SENSE2+ (2,12) | Current sense positive inputs | Differential inputs for inductor current sensing; supply current to comparators and tolerate common-mode up to 65V. |
| FREQ (4) | Oscillator programming | Resistor-to-GND or DC voltage sets switching frequency; 0V = 350kHz, INTVCC = 535kHz, external clock = 75–850kHz PLL lock. |
| SCL/SDA (30,29) | PMBus interface | Standard SMBus-compatible serial bus (10–400kHz); supports full command set including VOUT margining and fault logging. |
| CSLEW (34) | VOUT slew rate control | Capacitor-to-ground sets analog slew rate (1.7%/ms/nF); OPEN or INTVCC selects default nominal/fast/slow modes. |
| PGOOD (16) | Power-good monitor | Open-drain output asserting low when VOUT deviates >±10% from regulation - 25µs debounce prevents false trips. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase interleaving | Reduces input/output ripple current by ~70% vs single-phase, enabling smaller capacitors and inductors while maintaining 10A+ output capability. |
| PMBus telemetry engine | Real-time readback of VOUT, IIN, IOUT, VIN, internal/external temperature, and fault status at 25Hz refresh - eliminates need for external ADCs or sensors. |
| Configurable light-load operation | Three selectable modes (Burst, pulse-skip, forced CCM) via PLLIN/MODE pin voltage - optimizes efficiency across 10mA–10A load range. |
| Programmable VOUT slew rate | Hardware-controlled transition speed (via CSLEW capacitor or MFR_CONFIG) prevents output overshoot during dynamic voltage changes in FPGA/GPU supplies. |
| Robust current sensing | Dual independent differential sense amplifiers with matched thresholds (±9mV max mismatch) and 13-bit readback resolution - ensures accurate current sharing between phases. |
| Thermally enhanced QFN | 36-lead 5×6mm package with exposed paddle soldered to PCB ground plane - achieves 43°C/W junction-to-ambient, supporting >5W dissipation at 125°C ambient. |
Applications
| Medical Imaging Power Supply | Industrial Motor Drive Bias Rail |
|---|---|
Use Scenario: Generating stable 48V/5A bias for CT scanner detector modules requiring low noise and rapid transient response. IC Role / Device Role / Timing Role: Dual-phase synchronous boost controller managing interleaved inductor currents and PMBus-monitored output stability. Use Value: Achieves >94% efficiency at full load and <100µs load-step recovery (500mA→7A), meeting IEC 60601-1 leakage and EMI requirements. |
Use Scenario: Providing regulated 36V gate drive supply for 3-phase IGBT inverters in CNC machinery with wide input variation (12–48V battery/bus). IC Role / Device Role / Timing Role: High-voltage boost controller with programmable VOUT and EXTVCC switchover for seamless operation across input transients. Use Value: Maintains ±1% output accuracy over temperature and input range while reducing input capacitor size by 40% via interleaving. |
| Telecom Remote Radio Unit | Test Equipment Auxiliary Supply |
Use Scenario: Generating 24V/8A from 48V telecom rectifier for RF power amplifier bias, requiring remote telemetry and fault logging. IC Role / Device Role / Timing Role: Digital power controller with PMBus interface enabling remote configuration, margining, and black-box fault capture. Use Value: Supports READ_VOUT, READ_IOUT, and MFR_FAULT_LOG commands - reduces field service time by 60% via diagnostic data export. |
Use Scenario: Programmable auxiliary supply in automated test equipment where output voltage must be dynamically adjusted between 12V and 40V during calibration sequences. IC Role / Device Role / Timing Role: Precision-adjustable boost controller with hardware slew-rate control and 0.2% VOUT resolution. Use Value: CSLEW pin enables controlled 1.7%/ms voltage ramping - prevents DUT upset during voltage sweeps and meets MIL-STD-704E slew limits. |
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#PBF | Single-phase only; no PMBus interface; identical pinout except missing SDA/SCL/ALERT/ASEL/CSLEW pins. | Lacks telemetry, voltage margining, and digital configuration - suitable only for cost-sensitive, non-telemetric boost designs. | Select LTC7840IUHE#PBF only if PMBus functionality is unnecessary and board layout must reuse same footprint without serial bus routing. |
| MPQ8633BGLE-Z | Monolithic dual-phase boost IC (integrated MOSFETs); 4.5–36V input; fixed 5V/12V/15V outputs; no PMBus; 20V max VOUT. | Not programmable beyond preset VOUT options; lacks telemetry and wide-VOUT capability - limited to fixed-rail embedded applications. | Choose MPQ8633BGLE-Z for space-constrained designs needing integrated FETs and simplified BOM, but not for >36V output or telemetry-critical systems. |
Compared with LTC7840IUHE#PBF, the LTC7841IUHE#PBF adds full PMBus telemetry and dual-phase flexibility at the cost of two extra pins and higher BOM count; versus MPQ8633BGLE-Z, it trades monolithic integration for programmability, higher voltage range, and precision monitoring - making it optimal for industrial and medical systems requiring configurability and diagnostics.
Availability
LTC7841IUHE#PBF is available at Aetrix Electronics and suitable for medical imaging power supplies, industrial motor drive bias rails, and telecom remote radio units requiring stable component supply, long-term lifecycle support, and guaranteed –40°C to 125°C operation.
Supply support for LTC7841IUHE#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 since 1965.
The LTC7841IUHE#PBF belongs to Analog Devices' Power by Linear™ controller family, designed specifically for high-efficiency, digitally managed DC/DC conversion in demanding industrial and medical applications where reliability, telemetry, and wide input/output ranges are critical.
FAQ
What is the maximum output voltage supported by the LTC7841IUHE#PBF?
The LTC7841IUHE#PBF supports programmable output voltage up to 60V with 0.2% resolution via the PMBus MFR_VOUT_COMMAND register. This is achieved using an internal 13-bit DAC and verified across the full –40°C to 125°C operating range with ±1.2% total unadjusted error (TUE) for the LTC7841I grade. Output voltage is sensed remotely at the VOUT pin for closed-loop accuracy.
Does the LTC7841IUHE#PBF require external MOSFETs?
Yes, the LTC7841IUHE#PBF is a controller-only IC and requires external N-channel MOSFETs for both top (synchronous rectifier) and bottom (main switch) positions in each of its two phases. It integrates dual gate drivers with 1.2Ω pull-up/pull-down strength and 20ns switching transitions, but does not include power switches - enabling design flexibility and thermal optimization.
How does the PMBus interface of the LTC7841IUHE#PBF support system monitoring?
The LTC7841IUHE#PBF PMBus interface supports real-time readback of VOUT, IIN, IOUT, VIN, internal die temperature, and external temperature (via TSNS pin) at 25Hz refresh rate. It also reports fault status (OV, UV, OT, OC) via MFR_FAULT_LOG and enables voltage margining using MFR_VOUT_COMMAND - all accessible through standard PMBus commands without additional components.
What are the light-load operation modes available on the LTC7841IUHE#PBF?
The LTC7841IUHE#PBF offers three configurable light-load modes selected via the PLLIN/MODE pin voltage: Burst Mode® (pin ≤0.7V or floating), pulse-skipping (pin at 1.2–INTVCC−1.3V), and forced continuous conduction mode (pin = INTVCC). Each mode optimizes efficiency across different load ranges - Burst Mode® achieves <15mW no-load power, while forced CCM maintains low output ripple.
Can the LTC7841IUHE#PBF synchronize to an external clock?
Yes, the LTC7841IUHE#PBF can synchronize its switching frequency to an external clock applied to the PLLIN/MODE pin. When an external clock is present, the internal phase-locked loop forces the rising edge of BG1 to align with the rising edge of that clock, enabling deterministic timing across multiple converters in multi-rail systems and reducing conducted EMI peaks.
LTC7841IUHE#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)
LTC7841IUHE#PBF FAQ
1.How can I place an order for LTC7841IUHE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC7841IUHE#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 LTC7841IUHE#PBF reliable?
The price and inventory of LTC7841IUHE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC7841IUHE#PBF is usually 5 days.
3.What payment methods are accepted for LTC7841IUHE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC7841IUHE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC7841IUHE#PBF?
LTC7841IUHE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC7841IUHE#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 LTC7841IUHE#PBF?
For technical support, including LTC7841IUHE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC7841IUHE#PBF requirements.
6.How does Aetrix verify that LTC7841IUHE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC7841IUHE#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 LTC7841IUHE#PBF meets industry standards.
7.What is the process for return or replacement of LTC7841IUHE#PBF?
All LTC7841IUHE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC7841IUHE#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 LTC7841IUHE#PBF part is unused and in its original packaging.
Return procedure for LTC7841IUHE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC7841IUHE#PBF Tags
-
UCC28C45DR
Texas Instruments
-
UCC28C40DR
Texas Instruments
-
UCC28C43DR
Texas Instruments
-
ZXSC410E6TA
Diodes Incorporated
-
LM3524DMX/NOPB
Texas Instruments
-
LM3489MMX/NOPB
Texas Instruments
-
MIC2102YML-TR
Microchip Technology
-
LM5148RGYR
Texas Instruments
-
TL598CDR
Texas Instruments
-
LM5155DSSR
Texas Instruments
-
LM25085MYX/NOPB
Texas Instruments
-
UCC2813DTR-0
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
