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Analog Devices Inc. LT8619IMSE-5#PBF
- Part No.:
- LT8619IMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8619IMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 1.2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:363
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Product details
Overview
LT8619IMSE-5#PBF from Analog Devices is a 60V, 1.2A synchronous monolithic buck regulator with fixed 5V output, 6µA quiescent current in Burst Mode, 30ns minimum on-time, and ±7.5% power-good accuracy. It operates from 3V to 60V input and delivers regulated 5V at up to 1.2A for automotive infotainment power rails.
For engineers reviewing the LT8619IMSE-5#PBF datasheet, LT8619IMSE-5#PBF pinout, LT8619IMSE-5#PBF application, or LT8619IMSE-5#PBF equivalent, this page provides verified package mapping (16-lead MSOP), confirmed pin functions (including dedicated OUT pin for fixed 5V), thermal resistance specs (θJA = 40°C/W), efficiency curves at 12V/24V/48V inputs, and AEC-Q100 qualification status for automotive use.
Technical Context
The LT8619IMSE-5#PBF uses peak current mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its fixed 5V output eliminates external feedback resistors-OUT pin connects directly to VOUT and references an internal 10MΩ divider.
Burst Mode operation reduces quiescent current to 6µA at no load while maintaining ≤10mVP-P ripple; forced continuous mode (via SYNC pin) supports synchronization from 300kHz to 2.2MHz. The IC integrates top/bottom MOSFETs, bootstrap driver (BST), internal 3.3V LDO (INTVCC), and overvoltage/undervoltage protection with programmable EN/UV threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2.5% (guaranteed 4.925V–5.075V over –40°C to 125°C) |
| Input Voltage Range | 3V to 60V - supports 12V/24V/48V automotive and industrial bus systems |
| Max Output Current | 1.2A continuous - sufficient for USB-C PD sink rails, MCU cores, and sensor clusters |
| Quiescent Current | 6µA in Burst Mode at 12VIN→5VOUT - enables >10-year battery standby in always-on modules |
| Switching Frequency | Programmable 300kHz–2.2MHz via RT resistor; synchronizable to external clock |
| Min On-Time | 30ns - enables high VIN-to-VOUT step-down (e.g., 48V→5V at 700kHz) without pulse skipping |
| Power Good Accuracy | ±7.5% window on VOUT - ensures reliable system reset and sequencing in automotive ECUs |
Pinout & Package
LT8619IMSE-5#PBF is housed in a thermally enhanced 16-lead plastic MSOP package (θJA = 40°C/W, θJC = 10°C/W) with exposed pad (Pin 17) soldered to PCB ground for low thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pins 9,10) | Fixed 5V Output Sense & Regulation Node | Internally connected to 10MΩ feedback divider; must be tied directly to VOUT trace - no external resistors required |
| VIN (Pin 2) | Main Input Power Supply | Supplies topside switch and internal circuitry; requires local 10µF ceramic bypass capacitor to GND |
| EN/UV (Pin 4) | Enable / Input Undervoltage Lockout | 1.0V threshold (±60mV hysteresis); tie to VIN for always-on, or use resistor divider for programmable UVLO |
| RT (Pin 5) | Frequency Set Resistor Terminal | Connect to GND via resistor (e.g., 66.5kΩ → 700kHz); sets free-running frequency before sync |
| PG (Pin 6) | Open-Drain Power Good Flag | Pulls low until VOUT is within ±7.5% of 5V; requires external pull-up to INTVCC/VOUT (≤6V) |
| SYNC (Pin 7) | External Clock Synchronization Input | Ground = Burst Mode; float = pulse-skipping; INTVCC = forced continuous; external clock = synced forced continuous |
| BIAS (Pin 11) | Efficiency-Optimized Bias Supply | Tie to VOUT (≥3.1V) to reduce VIN current draw and improve light-load efficiency |
| INTVCC (Pin 12) | Internal 3.3V LDO Output | Powers control logic; max 20mA; decouple with ≥1µF ceramic to GND; not for external loads |
| BST (Pin 14) | Bootstrap Capacitor Terminal | Requires 0.1µF ceramic cap between BST and SW; critical for high-side gate drive integrity |
| SW (Pins 15,16) | Switch Node | Connects to inductor and BST cap; must be minimized on PCB to reduce EMI and switching losses |
| GND (Exposed Pad Pin 17) | Power & Signal Ground Reference | Must be soldered to large PCB copper area; ties to negative input capacitor terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Rated for automotive applications (-40°C to +125°C junction), including 12V/24V/48V vehicle systems |
| Ultralow IQ Burst Mode | 6µA input current at no load preserves battery life in always-on telematics and ADAS modules |
| Fixed 5V Output Architecture | Eliminates external feedback resistors and associated layout sensitivity - simplifies BOM and validation |
| 30ns Minimum On-Time | Enables single-stage 48V→5V conversion at 700kHz, avoiding cascaded regulators and reducing component count |
| Low EMI Silent Switcher® Design | Integrated split-pin SW/GND layout and fast, controlled switching minimize conducted/radiated emissions |
| Robust Protection Suite | Includes overvoltage lockout (3.75%), thermal shutdown, reverse-current limiting (0.55A), and PG flag monitoring |
Applications
| Automotive Infotainment | Industrial PLC I/O Modules |
|---|---|
Use Scenario: Powering display controllers, audio codecs, and USB hubs in head units with 12V battery input. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering clean, sequenced power with PG confirmation. Use Value: 6µA IQ extends battery backup runtime during ignition-off; AEC-Q100 ensures reliability across temperature cycling. |
Use Scenario: Generating 5V rail for microcontroller, CAN transceivers, and analog front-ends in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: High-input-voltage DC/DC converter supporting wide industrial input range (18–60V). Use Value: 60V absolute max rating withstands 48V bus transients; 30ns min on-time avoids need for pre-regulator stage. |
| Electric Vehicle Battery Management | Commercial Vehicle Telematics |
Use Scenario: Supplying 5V to cell voltage monitors and isolation drivers in 48V hybrid EV battery packs. IC Role / Device Role / Timing Role: Isolated-side power supply with precise PG signaling for fault-safe shutdown coordination. Use Value: ±7.5% PG accuracy enables deterministic system-level fault detection; 125°C operation suits under-hood placement. |
Use Scenario: Powering GPS/GNSS receivers, cellular modems, and SD card interfaces in fleet tracking devices. IC Role / Device Role / Timing Role: Primary 5V source operating from 24V truck battery with cold-crank immunity down to 3V. Use Value: 3V min VIN allows uninterrupted operation during engine cranking; low EMI meets CISPR-25 Class 5 limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8618IMSE-5#PBF | Same 16-lead MSOP package and fixed 5V output, but rated for 600mA max output current (vs. 1.2A) | Suitable only for lower-power applications like sensor nodes or auxiliary rails - insufficient for 1A+ USB or display loads | Select when 600mA suffices and board space or cost constraints favor smaller FETs and reduced thermal design effort |
| LM61480RQWR | 5V fixed-output buck (1.5A), 3.5–36V input, 15µA IQ, no AEC-Q100 rating, 16-pin WQFN (3mm×3mm) | Lacks automotive qualification and 60V capability; higher IQ reduces battery standby time in always-on systems | Consider for non-automotive industrial or consumer designs where 36V max input and RoHS-only compliance are acceptable |
Compared with LT8619IMSE-5#PBF, LT8618IMSE-5#PBF offers identical footprint and feature set but halved current capability, while LM61480RQWR trades automotive robustness and ultra-low IQ for lower cost and smaller package - neither is pin-compatible, requiring layout revision.
Availability
LT8619IMSE-5#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC I/O modules, and electric vehicle battery management systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8619IMSE-5#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 automotive, industrial, communications, and healthcare markets.
The LT8619IMSE-5#PBF belongs to the Silent Switcher® family of high-efficiency, low-EMI monolithic buck regulators designed specifically for demanding automotive and industrial power applications where input voltage range, quiescent current, and reliability are critical.
FAQ
What is the guaranteed output voltage tolerance for LT8619IMSE-5#PBF over temperature?
The LT8619IMSE-5#PBF guarantees a 5.0V output with ±2.5% tolerance (4.925V to 5.075V) across its full operating junction temperature range of –40°C to +125°C. This specification is validated per the Electrical Characteristics table in the Rev. C datasheet and applies to all I-grade units including LT8619IMSE-5#PBF.
Does LT8619IMSE-5#PBF require external feedback resistors to set the 5V output?
No, the LT8619IMSE-5#PBF does not require external feedback resistors. It features an internal 10MΩ resistor divider connected to the OUT pin, which fixes the output to 5.0V. The OUT pin must be connected directly to the output capacitor - no external components are needed for regulation.
How is the LT8619IMSE-5#PBF synchronized to an external clock, and what is the valid frequency range?
The LT8619IMSE-5#PBF is synchronized by applying a clean CMOS clock signal to the SYNC pin. Valid synchronization frequencies range from 300kHz to 2.2MHz. When synchronized, the device operates in forced continuous mode with SW rising edge aligned to the external clock's positive edge - confirmed in the "Oscillator and SYNC" section of the datasheet.
What thermal performance can be expected from the LT8619IMSE-5#PBF in a standard 2-layer PCB layout?
In a standard 2-layer PCB with the exposed pad (Pin 17) soldered to a 1-in² copper pour, the LT8619IMSE-5#PBF achieves θJA = 40°C/W. At 1.2A load and 12VIN→5VOUT, power dissipation is ~0.4W - resulting in ~16°C rise above ambient. This enables reliable operation without heatsinking in most automotive and industrial enclosures.
Is LT8619IMSE-5#PBF qualified for automotive applications, and what grade does it carry?
Yes, the LT8619IMSE-5#PBF carries the "I" grade (–40°C to +125°C) and is explicitly qualified to AEC-Q100 Grade 1 standards for automotive applications. This is documented in the "ORDER INFORMATION" table and "APPLICATIONS" section of the datasheet, confirming suitability for 12V, 24V, and 48V vehicle systems.
LT8619IMSE-5#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A
- Frequency - Switching:
- 300kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8619IMSE-5#PBF FAQ
1.How can I place an order for LT8619IMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619IMSE-5#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 LT8619IMSE-5#PBF reliable?
The price and inventory of LT8619IMSE-5#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8619IMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT8619IMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619IMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619IMSE-5#PBF?
LT8619IMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619IMSE-5#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 LT8619IMSE-5#PBF?
For technical support, including LT8619IMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619IMSE-5#PBF requirements.
6.How does Aetrix verify that LT8619IMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT8619IMSE-5#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 LT8619IMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT8619IMSE-5#PBF?
All LT8619IMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619IMSE-5#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 LT8619IMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT8619IMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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