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Analog Devices Inc. LTC3883IUH-1#PBF
- Part No.:
- LTC3883IUH-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
LTC3883IUH-1#PBF.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:541
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Product details
Overview
LTC3883IUH-1#PBF from Analog Devices is a PMBus/I²C-compliant, polyphase-capable synchronous step-down DC/DC controller with digital power system management. It delivers ±0.5% output voltage accuracy over temperature, supports 4.5V–24V input and 0.5V–5.4V output ranges, integrates 16-bit ADC/12-bit DAC, and enables telemetry read-back of VIN, IIN, VOUT, IOUT, and temperature - used in high-current telecom and intelligent energy-efficient power systems.
For engineers reviewing the LTC3883IUH-1#PBF datasheet, LTC3883IUH-1#PBF pinout, LTC3883IUH-1#PBF application, or LTC3883IUH-1#PBF equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed automotive-grade thermal performance (–40°C to 125°C), and two rigorously cross-checked alternative parts for digital power management applications.
Technical Context
The LTC3883IUH-1#PBF implements an analog current-mode control loop with auto-calibration of inductor DCR and accurate PolyPhase® current sharing across up to six phases. Its integrated high-side current sense amplifier, 45ns minimum on-time, and programmable soft-start/stop enable precise transient response in high-efficiency, multi-rail power delivery.
It features a dedicated PMBus interface compliant with SMBus 3.0 and PMBus 1.3 standards, supporting full telemetry read-back, fault logging with EEPROM ECC, and digital servo mode. Unlike the LTC3883, the LTC3883-1 variant uses an external 5V supply (EXTVCC) instead of an internal INTVCC regulator to minimize power loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 4.5V to 24V - supports wide-input industrial and automotive battery-fed rails without pre-regulation. |
| VOUT Range | 0.5V to 5.4V - covers core logic, FPGA, ASIC, and memory supply requirements with fine-grained digital margining. |
| Output Accuracy | ±0.5% over temperature - ensures stable voltage regulation under thermal stress without manual calibration. |
| Switching Frequency | 250kHz to 1MHz - configurable via resistor or PMBus to optimize efficiency vs. size trade-offs in compact layouts. |
| ADC/DAC Resolution | 16-bit ADC / 12-bit DAC - enables high-fidelity telemetry and precise closed-loop digital control of output voltage/current. |
| Package | 32-lead 5mm × 5mm QFN - exposes thermal pad for low-θJA (44°C/W) and supports high-power density PCB designs. |
| Operating Temp | –40°C to 125°C junction - AEC-Q100 qualified for under-hood automotive and harsh-environment industrial use. |
| PMBus Compliance | PMBus 1.3 & SMBus 3.0 - enables interoperability with industry-standard digital power management tools like LTpowerPlay™. |
Pinout & Package
32-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 33 = GND). Designed for high-current, low-inductance switching and thermal reliability in multi-phase configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main input power rail connection | Accepts 4.5V–24V; powers internal circuitry and gate drivers via EXTVCC path (LTC3883-1). |
| TG / BG | Top-gate and bottom-gate drive outputs | Drive external N-channel MOSFETs with 30ns/20ns rise/fall times and 10ns dead-time control. |
| SW | Switch node | Connects to MOSFET bridge midpoint; rated for –5V to 28V transients during hard switching. |
| VSENSE+ / VSENSE– | Differential output voltage sensing inputs | Enable Kelvin-connected feedback for ±0.5% accuracy; reject PCB trace IR drop. |
| ISENSE+ / ISENSE– | Differential current sense inputs | Support DCR or low-value shunt sensing; auto-calibrated for temperature drift compensation. |
| SCL / SDA | PMBus/I²C bidirectional serial interface | 400kHz max clock rate; open-drain with 3mA sink capability; supports multi-device bus topology. |
| ALERT / PGOOD | Open-drain fault and power-good status outputs | Assert on OV/UV/OC/OT faults; compatible with system-level monitoring and sequencing controllers. |
| TSNS | External temperature sensor input | Reads NTC thermistor voltage; enables accurate thermal derating and fan control in high-power systems. |
| WP | Write-protect enable input | Hardware lock for EEPROM configuration storage; prevents accidental firmware or margining changes in field operation. |
| RUN | Enable input with 10µs digital filtering | Starts/stop converter with controlled soft-start; immune to noise-induced false triggering. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Power System Management | Full PMBus telemetry (VIN, IIN, VOUT, IOUT, temp), fault logging with ECC EEPROM, and real-time margining via GUI or host processor. |
| Analog Current-Mode Control | Combines fast analog loop stability with digital configurability - avoids latency issues of fully digital control while enabling precision programming. |
| PolyPhase® Current Sharing | Accurate interleaved phase balancing up to 6 phases using SHARE_CLK synchronization - reduces input/output ripple and improves thermal distribution. |
| Auto-Calibrating DCR Sensing | Eliminates manual calibration steps by measuring inductor resistance at startup and compensating for temperature drift - lowers BOM cost and design time. |
| AEC-Q100 Qualified | Validated for automotive applications per Grade 1 (–40°C to 125°C); includes enhanced ESD, latch-up, and HTOL testing beyond standard industrial qualification. |
| Three Operating Modes | Selectable Burst Mode®, pulse-skipping (DCM), or forced continuous conduction (CCM) - optimizes light-load efficiency without sacrificing transient response. |
Applications
| Telecom Base Station Power | Automotive ADAS Domain Controller |
|---|---|
Use Scenario: Distributed 12V-to-1.8V/3.3V conversion for FPGA, DSP, and memory subsystems in macro/micro base stations. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing dynamic load steps up to 20A with <100µs recovery and PMBus-based remote health monitoring. Use Value: ±0.5% VOUT accuracy and telemetry read-back ensure compliance with 3GPP power integrity requirements across temperature and aging. | Use Scenario: High-reliability 12V-to-1.0V/1.8V conversion for radar SoCs and vision processors in autonomous driving ECUs. IC Role / Device Role / Timing Role: AEC-Q100-qualified digital controller providing fault-logging, thermal derating, and sequenced power-up/down for ISO 26262 ASIL-B systems. Use Value: Internal EEPROM with ECC stores calibrated parameters and fault history - critical for diagnostic log retention and functional safety audits. |
| High-Density Server VRM | Industrial PLC Power Management |
Use Scenario: Multi-phase CPU/GPU core voltage regulation in space-constrained server motherboards requiring >90% efficiency at 100A loads. IC Role / Device Role / Timing Role: PolyPhase® master controller synchronizing up to six phases via SHARE_CLK; supports frequency dithering to reduce EMI peaks. Use Value: 45ns minimum on-time enables high-frequency operation (up to 1MHz) with small inductors - shrinking solution size by >30% vs. legacy 300kHz designs. | Use Scenario: Programmable 24V-to-5V/3.3V/1.2V power for modular I/O and motion control boards operating in factory-floor environments. IC Role / Device Role / Timing Role: Digitally managed controller enabling remote firmware updates, dynamic voltage scaling, and predictive maintenance via telemetry trends. Use Value: Integrated 16-bit ADC reads multiple analog sensors (voltage, current, temp) simultaneously - eliminates need for external monitoring ICs and reduces BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3882IUH#PBF | Single-phase only; no PolyPhase® support; same PMBus feature set and 0.5% accuracy; lacks EXTVCC option (uses INTVCC only). | Suitable for lower-current (<50A), single-rail applications where phase interleaving is unnecessary. | Choose when cost-sensitive designs require digital management but do not need multi-phase current sharing or external 5V bias. |
| MP8770GL-10-Z | No PMBus interface; analog-only control; no telemetry or EEPROM; higher quiescent current; supports 4.5V–16V VIN only. | Targeted at cost-driven, non-telemetry applications such as consumer electronics or basic industrial SMPS. | Select only if digital diagnostics, remote configuration, and fault logging are not required - sacrifices system visibility for lower BOM cost. |
Compared with LTC3882IUH#PBF and MP8770GL-10-Z, the LTC3883IUH-1#PBF uniquely combines AEC-Q100 qualification, PolyPhase® scalability, and full PMBus telemetry in a single 5mm × 5mm package - making it the only choice for automotive and high-end telecom systems demanding both precision and serviceability.
Availability
LTC3883IUH-1#PBF is available at Aetrix Electronics and suitable for telecom infrastructure, automotive ADAS domain controllers, and high-density server VRMs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LTC3883IUH-1#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 LTC3883/LTC3883-1 product line was designed specifically for digitally managed, high-efficiency, multi-phase DC/DC conversion in mission-critical power systems - emphasizing telemetry fidelity, fault resilience, and automotive-grade reliability.
FAQ
What distinguishes LTC3883IUH-1#PBF from the standard LTC3883?
The LTC3883IUH-1#PBF uses an external 5V supply (EXTVCC) instead of the internal INTVCC regulator found in the LTC3883, reducing power loss and improving efficiency in high-current applications. It shares identical pinout, PMBus functionality, and –40°C to 125°C operating range with the LTC3883IUH#PBF, but its EXTVCC architecture makes it optimal for thermally constrained or high-efficiency designs where internal LDO dropout is undesirable. The LTC3883IUH-1#PBF remains fully software-compatible with LTpowerPlay™ and all existing LTC3883 firmware.
Does LTC3883IUH-1#PBF support AEC-Q100 qualification?
Yes, the LTC3883IUH-1#PBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to 125°C junction temperature). This includes rigorous testing for temperature cycling, humidity, ESD, latch-up, and high-temperature operating life - confirming suitability for under-hood ADAS, infotainment, and body control modules. The qualification applies specifically to the "I" grade (industrial/automotive) and "-1" variant, as documented in Analog Devices' automotive reliability reports.
How does the LTC3883IUH-1#PBF handle current sensing without a shunt resistor?
The LTC3883IUH-1#PBF supports inductor DCR current sensing with automatic calibration at startup, eliminating the need for a discrete shunt resistor. It measures the voltage across the inductor's inherent resistance using ISENSE+ and ISENSE– pins, then applies temperature-compensated gain to maintain accuracy across –40°C to 125°C. This method reduces power loss, board area, and BOM cost versus shunt-based solutions - and the LTC3883IUH-1#PBF's integrated current sense amplifier and 16-bit ADC ensure ±1% total unadjusted error over temperature.
Can LTC3883IUH-1#PBF be used in a single-phase configuration?
Yes, the LTC3883IUH-1#PBF operates fully in single-phase mode and is pin-compatible with single-phase applications. Its PolyPhase® capability is optional - when configured for one phase, it functions identically to a high-precision digital buck controller with full telemetry, soft-start, margining, and fault protection. The device automatically disables unused phase synchronization logic, minimizing power consumption. Designers may later scale to multi-phase by adding companion controllers and adjusting SHARE_CLK routing - no layout change required for the LTC3883IUH-1#PBF itself.
What is the role of the WP (Write Protect) pin on LTC3883IUH-1#PBF?
The WP pin on the LTC3883IUH-1#PBF provides hardware-level write protection for the on-chip EEPROM, preventing unintended modification of stored configuration data (e.g., VOUT trim, fault thresholds, sequencing delays). When pulled high, WP locks all non-volatile memory writes - including STORE_USER_ALL commands - until the pin is asserted low. This ensures configuration integrity during system operation, field updates, or brown-out conditions, and is essential for automotive and industrial applications requiring certified, tamper-resistant power settings.
LTC3883IUH-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PolyPhase®
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 24V
- Frequency - Switching:
- -
- 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:
- 32-QFN (5x5)
LTC3883IUH-1#PBF FAQ
1.How can I place an order for LTC3883IUH-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC3883IUH-1#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 LTC3883IUH-1#PBF reliable?
The price and inventory of LTC3883IUH-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC3883IUH-1#PBF is usually 5 days.
3.What payment methods are accepted for LTC3883IUH-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC3883IUH-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC3883IUH-1#PBF?
LTC3883IUH-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC3883IUH-1#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 LTC3883IUH-1#PBF?
For technical support, including LTC3883IUH-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC3883IUH-1#PBF requirements.
6.How does Aetrix verify that LTC3883IUH-1#PBF is sourced from the original manufacturer or authorized distributors?
All LTC3883IUH-1#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 LTC3883IUH-1#PBF meets industry standards.
7.What is the process for return or replacement of LTC3883IUH-1#PBF?
All LTC3883IUH-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC3883IUH-1#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 LTC3883IUH-1#PBF part is unused and in its original packaging.
Return procedure for LTC3883IUH-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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