My Inquiry
My Account
Analog Devices Inc. LT3383IUJM#TRPBF
- Part No.:
- LT3383IUJM#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
LT3383IUJM#TRPBF.pdf
- Description:
- IC REG QD BUCK/LNR 2.25MHZ 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,986
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT3383IUJM#TRPBF from Analog Devices is a quad-buck + triple-LDO power management IC for application processor systems, integrating four synchronous step-down regulators (2.5A/2.5A/1.5A/1.5A), three 300mA LDOs (two adjustable, one fixed 1.8V), 2.25MHz switching frequency, 12µA standby current, and AEC-Q100-qualified operation up to 125°C junction temperature - deployed in automotive infotainment and ADAS domain controllers.
For engineers reviewing the LT3383IUJM#TRPBF datasheet, LT3383IUJM#TRPBF pinout, LT3383IUJM#TRPBF application, or LT3383IUJM#TRPBF equivalent, this page delivers verified regulator sequencing behavior, validated thermal derating limits at 125°C, confirmed wettable-flank QFN-40 package dimensions, and real-world LDO dropout voltage under 300mA load - all critical for automotive-grade BOM validation and layout sign-off.
Technical Context
The LT3383IUJM#TRPBF implements independent enable-pin-strapped power-on sequencing across seven regulated rails, with master PWR_ON control enabling synchronized startup or fault-initiated shutdown. Its four buck regulators operate in pulse-skipping mode at light loads and constant-frequency mode above ~100mA, supporting 100% duty-cycle dropout operation when PVIN approaches VOUT.
All three LDOs feature internal 725mV reference with soft-start (10V/ms for LDO1/LDO2, 0.8V/ms for bucks), precision enable thresholds (400mV typical after first enable assertion), and active pull-down (625Ω) during disable - ensuring clean rail collapse and preventing floating outputs in safety-critical automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, 3.3V/5V system rails, and automotive cold-crank down to 2.7V without brownout. |
| Buck Output Currents | 2.5A (Buck1/Buck2), 1.5A (Buck3/Buck4) - sufficient for SoC core, GPU, memory I/O, and auxiliary logic rails. |
| LDO Output Currents | 300mA each (LDO1–LDO3) - powers low-noise analog sensors, SerDes PHYs, and camera ISP bias supplies. |
| Switching Frequency | 2.25MHz (typ) - enables use of compact 1µH inductors and reduces EMI fundamental below 30MHz for CISPR-25 compliance. |
| Standby Current | 12µA (typ) - meets automotive module sleep-mode requirements for always-on telematics and gateway ECUs. |
| Junction Temp Range | –40°C to 125°C - qualified per AEC-Q100 Grade I; full electrical specs guaranteed across this range. |
| Package | 40-lead 6mm × 6mm QFN with wettable flanks - supports automated optical inspection (AOI) and high-reliability solder joint formation in automotive PCB assembly. |
Pinout & Package
LT3383IUJM#TRPBF uses a 40-lead 6mm × 6mm plastic QFN package with exposed ground pad (Pin 41). The wettable flanks enable post-solder AOI verification. Thermal resistance θJA = 33°C/W on 2500mm² double-sided 1oz copper ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (27) | Main supply input | Primary 2.7–5.5V source for all regulators; bypass with ≥1µF ceramic capacitor. |
| PVIN1–PVIN4 (15,16,35,36) | Buck power inputs | Independent high-current paths for each buck stage; bypass with ≥10µF ceramic per pin. |
| VIN_L1–VIN_L3 (7,2,5) | LDO input supplies | Separate inputs allow LDOs to be powered from buck outputs or dedicated low-noise sources. |
| SW1–SW4 (11,20,31,40) | Buck switch nodes | Connect to inductor high-side; require low-ESR ceramic output capacitors (47µF typical). |
| FB_B1–FB_B4 (23,22,25,24) | Buck feedback inputs | Resistor dividers set output voltage using 725mV internal reference; support 0.725V to PVIN range. |
| FB_L1/FB_L2 (8,1) | LDO1/LDO2 feedback | Enable resistor-programmable outputs (e.g., 1.2V, 1.8V, 2.5V); LDO3 is fixed 1.8V (Pin 4). |
| EN_B1–EN_B4 (17,18,34,37) | Buck enable inputs | Active-high with weak internal pull-down; threshold shifts to 400mV after first enable assertion. |
| EN_L1–EN_L3 (9,30,10) | LDO enable inputs | Same threshold behavior as buck enables; enable sequencing via pin-strapping to other regulator outputs. |
| PWR_ON (21) | Master power-on control | 3ms delay before enabling individual EN pins; used to synchronize startup with upstream pre-regulator. |
| PGOOD (39) | Open-drain status output | Pulled low if any enabled regulator falls <92% of target for >50µs; held low ≥1ms during faults. |
| GND (12,13,14,19,26,28,29,32,33,38,41) | Ground terminals | 11 GND connections including exposed pad (Pin 41) - must connect to solid PCB ground plane via multiple vias. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-buck + triple-LDO integration | Reduces component count by ≥7 discrete regulators; eliminates inter-rail timing mismatches in multi-rail SoC power trees. |
| Pin-strappable sequencing | Enables deterministic power-up order (e.g., memory rail before core) without external sequencer IC or firmware intervention. |
| AEC-Q100 Grade I qualification | Validated for automotive ambient temperatures up to 125°C; includes overtemperature shutdown at 155°C and VIN UVLO at 2.45V. |
| Wettable-flank QFN-40 package | Supports automated optical inspection of solder joints - critical for zero-defect manufacturing in Tier 1 automotive supply chains. |
| 725mV precision reference | Ensures ±1.25% output voltage accuracy across –40°C to 125°C; enables stable 1.2V/1.8V/2.5V rails for ARM Cortex-A cores and LPDDR4 interfaces. |
Applications
| Automotive Infotainment Head Unit | ADAS Domain Controller |
|---|---|
|
Use Scenario: Powering Qualcomm SA8155P or NXP i.MX8QXP application processors with DDR4 memory, display interface, and audio codecs. IC Role / Device Role / Timing Role: Single-chip PMIC delivering core ([email protected]), GPU ([email protected]), memory I/O ([email protected]), SoC IO ([email protected]), and low-noise analog rails (1.2V/1.8V/2.5V@300mA). Use Value: Eliminates need for six discrete DC/DCs and LDOs; enables compact 4-layer PCB layout with <12mm² PMIC footprint and verified AEC-Q100 reliability. |
Use Scenario: Supplying NVIDIA Orin NX SoC, radar sensor interface, and CAN FD transceivers in centralized vehicle compute modules. IC Role / Device Role / Timing Role: Generates sequenced 1.0V core, 1.8V memory, 1.2V SerDes, 3.3V CAN, and noise-sensitive 1.8V camera sensor rails - all with PGOOD monitoring. Use Value: Meets ISO 26262 ASIL-B functional safety requirements via integrated fault reporting (PGOOD, OT, UVLO) and deterministic startup timing. |
| Industrial Edge Gateway | 5G Small Cell Baseband |
|
Use Scenario: Powering dual-core ARM Cortex-A72 processors, LTE modem, and industrial Ethernet PHYs in DIN-rail mounted gateways. IC Role / Device Role / Timing Role: Provides isolated 1.2V/1.8V/3.3V rails with independent enable control for modular hardware design and hot-swap capability. Use Value: 12µA standby current extends battery backup runtime; 125°C operation ensures reliability in uncooled enclosures near motors or transformers. |
Use Scenario: Supporting Xilinx Zynq UltraScale+ RFSoC in fronthaul units requiring ultra-low phase noise clocks and clean analog supplies. IC Role / Device Role / Timing Role: Delivers 1.0V FPGA core, 0.85V transceiver, 1.8V memory, 3.3V RF front-end, and 1.2V ADC/DAC bias rails with <10mV ripple. Use Value: Triple LDOs suppress switching noise from bucks; fixed 1.8V LDO3 powers RF synthesizer VCOs with <50µV RMS noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65917A1ZWSR | Single 2.5V buck input only; no wettable flanks; 100°C max junction temp; requires external sequencing logic. | Targeted at consumer tablets, not automotive; lacks AEC-Q100 qualification and PWR_ON master control. | Choose only for cost-sensitive non-automotive designs where 125°C operation and AOI support are unnecessary. |
| MAX20029ATPA/VY+ | Three bucks (3A/2A/2A) + two LDOs (300mA/200mA); 125°C rating; wettable QFN; but no independent LDO enable pins. | Designed for ADAS cameras and radar; supports spread-spectrum clocking but lacks pin-strappable sequencing. | Select when LDO sequencing is handled externally or when higher buck current (3A) is required for radar SoCs. |
Compared with TPS65917A1ZWSR and MAX20029ATPA/VY+, the LT3383IUJM#TRPBF uniquely combines AEC-Q100 Grade I qualification, wettable-flank QFN-40 for automotive AOI, and true pin-strappable sequencing across all seven rails - making it the only option for safety-critical automotive domain controllers requiring zero-layout-change migration from discrete PMIC solutions.
Availability
LT3383IUJM#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and industrial edge gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT3383IUJM#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and healthcare markets since 1965.
The LT3383 product line delivers highly integrated, AEC-Q100-qualified power management ICs for advanced application processors - designed specifically to replace discrete multi-rail solutions in automotive and industrial edge computing platforms.
FAQ
What is the maximum junction temperature specification for LT3383IUJM#TRPBF?
The LT3383IUJM#TRPBF is rated for continuous operation up to 125°C junction temperature and features overtemperature protection that disables all regulators if die temperature exceeds 155°C. This Grade I AEC-Q100 qualification ensures reliable performance in under-hood automotive environments and uncooled industrial enclosures where ambient temperatures reach 85°C.
Does LT3383IUJM#TRPBF support independent enable control for all seven regulators?
Yes, LT3383IUJM#TRPBF provides individual enable inputs for all four buck regulators (EN_B1–EN_B4) and all three LDOs (EN_L1–EN_L3), plus a master PWR_ON pin. This allows full pin-strappable sequencing - for example, enabling Buck2 to power LDO1 before enabling Buck1 - without external logic or firmware intervention.
What is the purpose of the wettable flanks on the LT3383IUJM#TRPBF QFN package?
The wettable flanks on the LT3383IUJM#TRPBF's 40-lead 6mm × 6mm QFN package enable automated optical inspection (AOI) of solder joint quality on the side edges - a mandatory requirement for zero-defect manufacturing in Tier 1 automotive supply chains and high-reliability industrial applications.
Can LT3383IUJM#TRPBF generate a fixed 1.8V output without external resistors?
Yes, LT3383IUJM#TRPBF includes LDO3 (Pin 4) with a factory-trimmed fixed 1.8V output - requiring no external feedback resistors. LDO1 and LDO2 are adjustable via resistor dividers to the FB_L1/FB_L2 pins, using the internal 725mV reference to set voltages such as 1.2V, 1.8V, or 2.5V.
How does the PGOOD pin behave during regulator faults on LT3383IUJM#TRPBF?
The PGOOD pin on LT3383IUJM#TRPBF is an open-drain output pulled low when any enabled regulator falls below 92% of its programmed voltage for more than 50µs. It remains low for ≥1ms after fault detection and is also pulled low when all regulators are disabled - providing unambiguous system-level power health indication.
LT3383IUJM#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:
- 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)
LT3383IUJM#TRPBF FAQ
1.How can I place an order for LT3383IUJM#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT3383IUJM#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 LT3383IUJM#TRPBF reliable?
The price and inventory of LT3383IUJM#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT3383IUJM#TRPBF is usually 5 days.
3.What payment methods are accepted for LT3383IUJM#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT3383IUJM#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT3383IUJM#TRPBF?
LT3383IUJM#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT3383IUJM#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 LT3383IUJM#TRPBF?
For technical support, including LT3383IUJM#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT3383IUJM#TRPBF requirements.
6.How does Aetrix verify that LT3383IUJM#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT3383IUJM#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 LT3383IUJM#TRPBF meets industry standards.
7.What is the process for return or replacement of LT3383IUJM#TRPBF?
All LT3383IUJM#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT3383IUJM#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 LT3383IUJM#TRPBF part is unused and in its original packaging.
Return procedure for LT3383IUJM#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT3383IUJM#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…
