My Inquiry
My Account
Analog Devices Inc. LT3380EUJM#TRPBF
- Part No.:
- LT3380EUJM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LT3380EUJM#TRPBF.pdf
- Description:
- IC REG QD BUCK/LNR 2.25MHZ 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,634
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3380EUJM#TRPBF from Analog Devices is a multioutput power management IC integrating four synchronous buck DC/DC converters (2.5A, 2.5A, 1.5A, 1.5A) and three 300mA LDO regulators with I²C programmability, designed for portable application processor systems requiring precise rail sequencing and dynamic voltage scaling.
For engineers reviewing the LT3380EUJM#TRPBF datasheet, LT3380EUJM#TRPBF pinout, LT3380EUJM#TRPBF application, or LT3380EUJM#TRPBF equivalent, key selection considerations include I²C-configurable startup sequencing, 12µA standby current, selectable 1.12MHz/2.25MHz switching frequency, and operation across –40°C to +125°C junction temperature.
Technical Context
The LT3380EUJM#TRPBF implements independent control logic for each of its seven regulators: two 2.5A and two 1.5A buck stages with PMOS/NMOS RDS(ON) values of 120mΩ/70mΩ and 160mΩ/80mΩ respectively, plus three LDOs - two adjustable (725mV reference) and one fixed 1.8V output - all supporting soft-start, fault reporting, and autonomous power-down via I²C command registers.
Its I²C interface (400kHz, 7-bit address 0x78) enables real-time dynamic voltage scaling, per-rail enable/disable, power-good monitoring, IRQ status interrogation, and configurable undervoltage warning thresholds (programmable from 2.7V to 3.4V in 100mV steps), with PWR_ON master control and hardware-based sequencing via enable pin strapping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V VIN supply; supports core SoC rails in battery-powered portable systems. |
| Buck Output Currents | Two 2.5A (Buck1/Buck2), two 1.5A (Buck3/Buck4); sufficient for CPU/GPU core, memory, I/O, and SoC auxiliary rails. |
| LDO Outputs | Three 300mA LDOs: LDO1/LDO2 adjustable (725mV ref), LDO3 fixed 1.8V; optimized for low-noise analog/RF biasing. |
| Standby Current | 12µA typical at VIN; enables ultra-low-power system sleep states without compromising wake-up responsiveness. |
| Switching Frequency | Selectable 1.125MHz or 2.25MHz; balances efficiency vs. size trade-off for 1µH inductors and compact 6mm × 6mm QFN layout. |
| Operating Temperature | –40°C to +125°C junction; qualified for industrial and extended-temperature embedded applications. |
| I²C Interface | Standard-mode (400kHz), DVDD-referenced (1.6V–5.5V), 7-bit address 0x78; enables full register-level configuration and status readback. |
Pinout & Package
LT3380EUJM#TRPBF is housed in a 40-lead, 6mm × 6mm plastic QFN package with side-wettable flanks for optical solder inspection. The exposed pad (Pin 41) is GND and must be soldered to a continuous PCB ground plane using multiple thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B1–FB_B4 | Buck feedback inputs | Set output voltages via resistor dividers; reference = 725mV ±12.5mV LSB step; supports dynamic voltage scaling. |
| FB_L1, FB_L2 | LDO1/LDO2 feedback inputs | Enable adjustable outputs (e.g., VLDO = (1 + R1/R2) × 0.725V); LDO3 has no feedback pin (fixed 1.8V). |
| EN_B1–EN_B4, EN_L1–EN_L3 | Independent regulator enables | Active-high pins with internal weak pull-downs; support hardware sequencing or I²C override. |
| PWR_ON | Master power-on control | High-to-enable gate: delays regulator enable by 3ms after assertion; inhibits enables when low (1s recovery). |
| IRQ, PGOOD | Status outputs | Open-drain signals: IRQ asserts on UVLO, overtemp, or PGOOD fault; PGOOD deasserts if any enabled rail drops >6%. |
| SDA, SCL, DVDD | I²C interface | DVDD powers I²C logic (1.6V–5.5V); SDA/SCL levels scale to DVDD; supports full register access and interrupt clearing. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-programmable sequencing | Four programmable power-down time slots and flexible startup order via register writes or pin-strapped enables. |
| Dynamic voltage scaling (DVS) | Per-buck DAC-controlled output adjustment with 12.5mV resolution; supports adaptive CPU voltage/frequency scaling. |
| Multi-mode buck operation | Selectable pulse-skipping, Burst Mode®, or forced continuous mode per regulator to optimize light-load vs. full-load efficiency. |
| Integrated fault protection | Undervoltage lockout (UVLO rising 2.65V), overtemperature shutdown (>150°C), and open-drain IRQ/PGOOD reporting. |
| Low-noise LDO architecture | 300mA LDOs with 0.01%/V line regulation and 0.01–0.05% load regulation; dropout as low as 210mV @300mA (1.2V out). |
Applications
| Mobile Application Processor Power | Automotive Infotainment SoC |
|---|---|
|
Use Scenario: Powering ARM-based application processors (e.g., Qualcomm Snapdragon, MediaTek Dimensity) with multiple voltage domains including CPU core, GPU, DDR memory, and peripheral I/O. IC Role / Device Role / Timing Role: Centralized PMIC managing seven independent rails, coordinating power-up/down sequences, and enabling DVS during workload transitions. Use Value: Reduces external component count by integrating four high-current bucks and three precision LDOs in one 6mm × 6mm package, simplifying layout and improving system-level power efficiency. |
Use Scenario: Supplying infotainment head units with ADAS integration, requiring AEC-Q100-compliant power delivery to DSPs, display controllers, and audio codecs. IC Role / Device Role / Timing Role: Industrial-grade PMIC delivering sequenced, monitored, and fault-reporting power to safety-critical subsystems under wide ambient temperature variation. Use Value: Enables robust operation from –40°C to +125°C with UVLO, overtemperature, and PGOOD monitoring-critical for automotive qualification and field reliability. |
| Industrial Edge AI Gateway | Portable Medical Imaging Module |
|
Use Scenario: Powering heterogeneous compute modules (e.g., NPU + FPGA + microcontroller) in fanless edge servers deployed in factory environments. IC Role / Device Role / Timing Role: Multi-rail PMIC providing isolated, low-noise supplies while supporting remote firmware updates via I²C register reconfiguration. Use Value: 12µA standby current extends battery backup runtime; I²C accessibility allows runtime rail tuning without hardware changes. |
Use Scenario: Driving ultrasound transducer arrays and ADC front-ends in handheld diagnostic devices where EMI-sensitive analog performance is critical. IC Role / Device Role / Timing Role: Low-noise power source combining high-efficiency bucks for digital logic and ultra-stable LDOs for analog signal chains. Use Value: LDO1/LDO2's 725mV reference and <0.05% load regulation ensure stable bias for precision amplifiers and ADC references, minimizing measurement drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS659122YFFR | 6-buck + 6-LDO; 2.5MHz max switching; no side-wettable QFN; I²C only (no pin-strapping) | Higher channel count but lacks hardware sequencing pins; requires full software control for all enables | Choose when maximum regulator count outweighs need for pin-strapped fallback sequencing. |
| MAX20029ATGB/V+T | 4-buck + 3-LDO; AEC-Q100 Grade 0 (–40°C to +150°C); 2.2MHz switching; SPI interface only | Automotive-qualified with wider temp range but no I²C - limits compatibility with existing I²C-based firmware stacks | Prefer for new automotive designs requiring Grade 0 operation and SPI-only infrastructure. |
Compared with TPS659122YFFR and MAX20029ATGB/V+T, the LT3380EUJM#TRPBF uniquely combines I²C configurability with hardware enable pins, 12µA standby, and side-wettable QFN - offering design flexibility, testability, and ultra-low-power readiness in a single industrial-grade package.
Availability
LT3380EUJM#TRPBF is available at Aetrix Electronics and suitable for mobile application processor power, automotive infotainment SoC, and industrial edge AI gateway applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT3380EUJM#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 with precision power, sensing, and connectivity solutions.
The LT3380EUJM#TRPBF belongs to Analog Devices' Power Management IC product line, engineered specifically for advanced portable and embedded systems demanding tightly regulated, sequenced, and dynamically scalable multi-rail power delivery.
FAQ
What is the operating temperature range for the LT3380EUJM#TRPBF?
The LT3380EUJM#TRPBF is rated for an operating junction temperature range of –40°C to +125°C. This specification is guaranteed for the "E" grade variant, making it suitable for industrial and extended-temperature embedded applications. The device includes overtemperature protection that activates above 150°C to prevent damage during transient overload conditions.
Does the LT3380EUJM#TRPBF support hardware-based power sequencing without I²C?
Yes, the LT3380EUJM#TRPBF supports hardware-based sequencing through its dedicated enable pins (EN_B1–EN_B4, EN_L1–EN_L3) and master PWR_ON input. Regulators can be sequenced by connecting outputs to upstream enable pins in the desired order. PWR_ON provides a 3ms delay before enabling downstream regulators, allowing simple, deterministic startup without firmware intervention.
How does dynamic voltage scaling work on the LT3380EUJM#TRPBF?
Dynamic voltage scaling on the LT3380EUJM#TRPBF is implemented via I²C-accessible DAC registers controlling each buck converter's feedback reference. With 12.5mV LSB resolution and a 725mV nominal reference, output voltages can be adjusted in fine steps (e.g., 0.725V to 0.800V) to match real-time processor load demands - reducing power consumption during low-activity periods.
What is the purpose of the side-wettable flanks on the LT3380EUJM#TRPBF QFN package?
The side-wettable flanks on the LT3380EUJM#TRPBF's 40-lead 6mm × 6mm QFN package enable automated optical inspection (AOI) of solder joint quality at the package perimeter. This feature improves manufacturing yield and reliability verification in high-volume production, especially for thermally demanding applications where robust thermal coupling to the PCB ground plane is critical.
Can the LT3380EUJM#TRPBF's LDO3 output be adjusted, or is it fixed?
LDO3 on the LT3380EUJM#TRPBF is a fixed 1.8V output with no feedback pin (Pin 4 is LDO3 output; Pin 5 is VIN_L3). Its voltage is trimmed to 1.746V–1.854V over temperature and load. In contrast, LDO1 and LDO2 are adjustable using external resistor dividers tied to FB_L1 (Pin 8) and FB_L2 (Pin 1), referencing the internal 725mV bandgap.
LT3380EUJM#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck)
- Number of Outputs:
- 4
- Frequency - Switching:
- 1.12MHz, 2.25MHz
- Voltage/Current - Output 1:
- 0.725V ~ 5.5V, 2.5A
- Voltage/Current - Output 2:
- 0.725V ~ 5.5V, 2.5A
- Voltage/Current - Output 3:
- 1.8V, 1.5A
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 40-QFN (6x6)
LT3380EUJM#TRPBF FAQ
1.How can I place an order for LT3380EUJM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3380EUJM#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 LT3380EUJM#TRPBF reliable?
The price and inventory of LT3380EUJM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3380EUJM#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3380EUJM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3380EUJM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3380EUJM#TRPBF?
LT3380EUJM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3380EUJM#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 LT3380EUJM#TRPBF?
For technical support, including LT3380EUJM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3380EUJM#TRPBF requirements.
6.How does Aetrix verify that LT3380EUJM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3380EUJM#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 LT3380EUJM#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3380EUJM#TRPBF?
All LT3380EUJM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3380EUJM#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 LT3380EUJM#TRPBF part is unused and in its original packaging.
Return procedure for LT3380EUJM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3380EUJM#TRPBF Tags
-
TPS6521905RHBR
Texas Instruments
-
MIC3385YHL-TR
Microchip Technology
-
A4402ELPTR-T
Allegro MicroSystems
-
LM26480SQ-AA/NOPB
Texas Instruments
-
A4402KLPTR-T
Allegro MicroSystems
-
BD71847AMWV-E2
ROHM Semiconductor
-
ADP5040ACPZ-1-R7
Analog Devices Inc.
-
LT3048IDC#TRPBF
Analog Devices Inc.
-
ADP5037ACPZ-R7
Analog Devices Inc.
-
XRP7714ILB-F
MaxLinear, Inc.
-
LTC3260EDE#TRPBF
Analog Devices Inc.
-
LTC3260EMSE#PBF
Analog Devices Inc.
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…
