My Inquiry
My Account
Analog Devices Inc. LTC3884IUK#PBF
- Part No.:
- LTC3884IUK#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
LTC3884IUK#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:478
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC3884IUK#PBF from Analog Devices is a dual-output PolyPhase synchronous step-down DC/DC controller with integrated N-channel MOSFET gate drivers, PMBus-compliant I²C interface, sub-milliohm DCR current sensing, and digital power system management. It supports 4.5V–38V input, delivers two independent outputs (0.5V–5.5V), and enables precise voltage regulation (±0.5% over temperature) in telecom, datacom, and industrial point-of-load systems.
For engineers reviewing the LTC3884IUK#PBF datasheet, LTC3884IUK#PBF pinout, LTC3884IUK#PBF application, or LTC3884IUK#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping (48-lead 7mm × 7mm QFN), real-world telemetry capabilities (VIN/IIN/VOUT/IOUT/temperature readback), and documented alternative options for dual-phase digital power control.
Technical Context
The LTC3884IUK#PBF implements a constant-frequency current-mode control architecture optimized for ultra-low-resistance inductor DCR sensing (down to 0.32mΩ), enabling high-accuracy current monitoring without external sense resistors. Its dual-channel design supports independent soft-start, sequencing, margining, and fault management per output.
Digital loop compensation is programmable via PMBus commands, allowing real-time adjustment of error amplifier transconductance (gm = 1–5.76 mmho) and compensation resistor values (0–62 kΩ). The device integrates EEPROM with ECC for fault logging, configuration storage, and 10-year data retention at ≤125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 38V - supports wide-input industrial and telecom rails without external regulators. |
| Output Voltage Range | 0.5V to 5.5V - configurable per channel via PMBus or resistor programming; low-DCR mode extends lower range to 0.5V–3.5V. |
| Output Voltage Accuracy | ±0.5% over temperature - ensures stable core voltage delivery for FPGAs, ASICs, and processors under thermal stress. |
| Current Sensing | Sub-milliohm DCR sensing - eliminates power loss and board space of shunt resistors; supports 0.32mΩ inductors. |
| Telemetry Resolution | VOUT: 16-bit (244 µV LSB); IOUT: 10-bit (15.63–125 µV LSB); Temperature: 0.25°C resolution - enables precise system-level power monitoring. |
| PMBus Compliance | PMBus v1.3 - full support for READ_VIN, READ_IIN, READ_VOUT, READ_IOUT, READ_TEMPERATURE_1/2, and fault logging commands. |
| Gate Drivers | Integrated N-channel drivers (TG RUP = 2.6 Ω, TG RDOWN = 1.5 Ω) - drives high-side MOSFETs directly without external drivers. |
Pinout & Package
Package: 48-lead (7mm × 7mm) plastic QFN with exposed SGND pad (Pin 49), θJA = 31°C/W, operating junction temperature –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE0+/VSENSE0– | Channel 0 output voltage feedback | Differential sensing for precise regulation; supports remote sensing to compensate PCB IR drop. |
| ISENSE0+/ISENSE0– | Channel 0 DCR current sense inputs | Accepts millivolt-level differential signals from inductor DCR; enables sub-mΩ sensing accuracy. |
| TG0/BG0 | Channel 0 top/bottom gate drivers | Direct drive outputs for external N-channel MOSFETs; 2.6 Ω pull-up / 1.5 Ω pull-down RDS(ON). |
| PGOOD0/FAULT0 | Channel 0 power-good indicator and fault flag | Open-drain outputs with 60 µs digital filtering; assert on OV/UV/OC/OT faults per channel. |
| SDA/SCL/ALERT | PMBus serial interface and system alert | I²C-compatible bus with 400 kHz max clock; ALERT signals register-based fault conditions to host controller. |
| RUN0/RUN1 | Channel enable inputs | Logic-controlled startup sequencing; supports voltage- or time-based ramp control per output. |
| SHARE_CLK | PolyPhase current-sharing clock | Enables accurate load sharing across up to six phases when multiple controllers are synchronized. |
Key Features
| Feature | Design Value |
|---|---|
| Digital loop compensation | Programmable gm (1–5.76 mmho) and RTH (0–62 kΩ) via PMBus - eliminates manual RC tuning and enables adaptive stability optimization. |
| Internal EEPROM with ECC | 10,000 write cycles, 10-year data retention at ≤125°C - stores configurations, fault logs, and calibration data without external memory. |
| Integrated input current sense amplifier | Configurable gain (2/4/8) and 10-bit readback - measures total system input current with ±1.2–2% TUE for power budgeting. |
| Accurate PolyPhase current sharing | Supports up to 6-phase operation with <±1% current mismatch - enables scalable high-current designs for AI accelerators and servers. |
| AEC-Q100 qualified | Rated for automotive applications (–40°C to +125°C) - meets reliability requirements for infotainment and ADAS power supplies. |
Applications
| Telecom Base Station Power | Data Center Point-of-Load |
|---|---|
Use Scenario: Dual-rail power for FPGA and DSP cores in 5G macro base stations requiring tight voltage tolerance and telemetry. IC Role / Device Role / Timing Role: Dual-output PolyPhase controller managing 1.8V/30A and 1.0V/30A rails with independent sequencing and real-time current monitoring. Use Value: ±0.5% VOUT accuracy and sub-milliohm DCR sensing ensure compliance with FPGA VCCINT/VCCO specs while eliminating shunt resistor losses. | Use Scenario: High-efficiency intermediate bus conversion feeding multiple server CPU/GPU VRMs in rack-mounted systems. IC Role / Device Role / Timing Role: Master controller providing 12V-to-3.3V/5V pre-regulation with PMBus telemetry for upstream power management ICs. Use Value: Integrated EEPROM stores calibrated settings across firmware updates; SHARE_CLK synchronizes with downstream VRMs for ripple cancellation. |
| Industrial PLC Power Supply | Automotive Infotainment System |
Use Scenario: Robust dual-output supply for programmable logic controllers operating in harsh factory environments with wide input voltage swings. IC Role / Device Role / Timing Role: Controller delivering 5V/2A for microcontroller and 3.3V/3A for I/O interfaces with undervoltage lockout and thermal fault protection. Use Value: Wide 4.5V–38V VIN range accommodates 24V industrial buses with brownout; internal INTVCC regulator simplifies auxiliary rail design. | Use Scenario: Power management for head-unit SoCs and display drivers in vehicles requiring AEC-Q100 compliance and fault logging. IC Role / Device Role / Timing Role: Dual-phase controller generating 1.1V/15A for application processor and 1.8V/10A for DDR memory with margining and sequencing. Use Value: Fault logging to EEPROM captures thermal/overcurrent events for diagnostic traceability; ±0.5% accuracy maintains SoC timing margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3883IUK#PBF | Single-output controller; same PMBus interface, DCR sensing, and EEPROM features but lacks second channel and PolyPhase capability. | Suitable only for single-rail systems; cannot replace dual-output requirement without adding second IC. | Select when only one regulated output is needed and board space/cost must be minimized. |
| MP2965GQ-PR | Monolithic dual-output buck controller (integrated MOSFETs); no PMBus, only SMBus-lite; no EEPROM or fault logging; 4.5V–16V VIN. | Limited to lower-voltage applications; lacks telemetry depth and long-term configuration storage. | Choose for cost-sensitive consumer electronics where digital management is secondary to integration. |
Compared with LTC3883IUK#PBF and MP2965GQ-PR, the LTC3884IUK#PBF uniquely combines dual independent outputs, full PMBus v1.3 compliance, on-chip gate drivers, and EEPROM-based fault logging - making it the only option supporting complex multi-rail sequencing and field-diagnostic power systems.
Availability
LTC3884IUK#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, data center power distribution, and industrial embedded systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC3884IUK#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and power management markets.
The LTC3884 product line delivers digitally managed multi-phase DC/DC controllers targeting high-reliability, telemetry-rich power systems in telecom, computing, and automotive applications - emphasizing configurability, fault resilience, and long-term data integrity.
FAQ
What is the maximum number of phases supported by the LTC3884IUK#PBF?
The LTC3884IUK#PBF supports accurate PolyPhase current sharing for up to six phases when used in master-slave configurations with additional LTC3884 or LTC3884-1 controllers. Its SHARE_CLK pin provides synchronization, and phase offset is programmable via PMBus commands to minimize input/output ripple. This capability is confirmed in the "PolyPhase Load Sharing" section of the Rev. G datasheet.
Does the LTC3884IUK#PBF require external gate drivers?
No, the LTC3884IUK#PBF integrates N-channel MOSFET gate drivers for both high-side (TG0/TG1) and low-side (BG0/BG1) switches, with typical RDS(ON) of 2.6 Ω (pull-up) and 1.5 Ω (pull-down). This eliminates the need for external drivers in most medium-current applications. The datasheet specifies these values in the Electrical Characteristics table under "Gate Drivers (LTC3884)".
Can the LTC3884IUK#PBF operate with a 24V input supply?
Yes, the LTC3884IUK#PBF supports an input voltage range of 4.5V to 38V, fully covering standard 24V industrial and telecom supply rails. Its undervoltage lockout activates below 3.55V (rising) and its INTVCC regulator maintains stable 5.5V operation across this range, as verified in the Absolute Maximum Ratings and Electrical Characteristics sections.
How does the LTC3884IUK#PBF handle overtemperature faults?
The LTC3884IUK#PBF monitors both internal die temperature (via on-chip sensor) and external temperature (via TSNS0/TSNS1 pins). An internal overtemperature fault triggers shutdown at 150°C (typical), while external OT/UT faults are configurable via PMBus thresholds. Faults are logged to internal EEPROM and asserted on FAULT0/FAULT1 pins with digital filtering, per the "Fault Detection and Handling" section.
Is the LTC3884IUK#PBF pin-compatible with the LTC3884-1 variant?
No, the LTC3884IUK#PBF (LTC3884) and LTC3884-1 variants have different pin functions: the LTC3884IUK#PBF uses TG0/TG1 and BG0/BG1 for gate drive, while the LTC3884-1 substitutes PWM0/PWM1 and VCC0/VCC1 for DrMOS compatibility. Pin Configuration diagrams in the datasheet confirm non-interchangeable layouts - e.g., Pin 35 is TG1 on LTC3884 vs. VCC1 on LTC3884-1.
LTC3884IUK#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 2
- Output Phases:
- 2
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 38V
- Frequency - Switching:
- 200kHz ~ 1MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- I2C, PMBus
- Control Features:
- Enable, Frequency Control, Phase Control, Power Good
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-QFN (7x7)
LTC3884IUK#PBF FAQ
1.How can I place an order for LTC3884IUK#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3884IUK#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 LTC3884IUK#PBF reliable?
The price and inventory of LTC3884IUK#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3884IUK#PBF is usually 5 days.
3.What payment methods are accepted for LTC3884IUK#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3884IUK#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3884IUK#PBF?
LTC3884IUK#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3884IUK#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 LTC3884IUK#PBF?
For technical support, including LTC3884IUK#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3884IUK#PBF requirements.
6.How does Aetrix verify that LTC3884IUK#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3884IUK#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 LTC3884IUK#PBF meets industry standards.
7.What is the process for return or replacement of LTC3884IUK#PBF?
All LTC3884IUK#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3884IUK#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 LTC3884IUK#PBF part is unused and in its original packaging.
Return procedure for LTC3884IUK#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC3884IUK#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…
