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Analog Devices Inc. LT8619EMSE-5#PBF
- Part No.:
- LT8619EMSE-5#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8619EMSE-5#PBF.pdf
- Description:
- IC REG BUCK 5V 1.2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:227
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Product details
Overview
LT8619EMSE-5#PBF from Analog Devices is a 60V, 1.2A synchronous monolithic buck regulator with 6µA quiescent current in Burst Mode, fixed 5V output, and 700kHz switching frequency (RT = 66.5kΩ). It features an integrated power stage, Power Good flag, and operates across –40°C to 125°C for automotive and industrial power supplies.
For engineers reviewing the LT8619EMSE-5#PBF datasheet, LT8619EMSE-5#PBF pinout, LT8619EMSE-5#PBF application, or LT8619EMSE-5#PBF equivalent, this page delivers verified specifications, thermal package data, real-world efficiency curves at 12V/24V/48V input, confirmed 5V regulation accuracy (±0.5%), and validated alternative parts for 5V automotive DC/DC designs.
Technical Context
The LT8619EMSE-5#PBF implements peak current mode control with internal compensation, enabling fast transient response and stable operation with small inductors (e.g., 10µH IHLP-2020BZ-01). Its 30ns minimum on-time supports high VIN/VOUT ratios, such as 48V-to-5V conversion at 700kHz.
Burst Mode operation maintains 10mVP-P output ripple at no load while drawing only 6µA from 12VIN, and forced continuous mode (via SYNC pin) enables EMI-sensitive applications. The device integrates top/bottom MOSFETs with 0.45Ω/0.22Ω RDS(ON), supports BIAS pin sourcing for >3.3V outputs, and includes overvoltage protection tripping at +3.75% VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±0.5% - eliminates external feedback resistors; validated across –40°C to 125°C. |
| Input Voltage Range | 3V to 60V - supports 12V/24V/48V automotive and industrial rails without pre-regulation. |
| Quiescent Current | 6µA at 12VIN → 5VOUT - enables always-on systems with multi-year battery life. |
| Switching Frequency | 700kHz (RT = 66.5kΩ) - balances efficiency, size, and EMI; synchronizable up to 2.2MHz. |
| Continuous Output Current | 1.2A - sustained delivery with thermal derating per θJA = 40°C/W (MSOP package). |
| Power Good Threshold | ±7.5% of 5V - PG asserts when VOUT is within 4.625V–5.375V, with 60µs delay. |
| Minimum On-Time | 30ns - enables high step-down ratios (e.g., 48V→5V at 700kHz, D ≈ 11%). |
Pinout & Package
LT8619EMSE-5#PBF uses a thermally enhanced 16-lead plastic MSOP package with exposed pad (Pin 17 = GND), θJA = 40°C/W, θJC = 10°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 3, 13 | NC | No connect - not bonded internally; leave unconnected or float. |
| Pin 2 | VIN | Main input supply (3V–60V); connects to input capacitor and topside switch. |
| Pin 4 | EN/UV | Enable/undervoltage lockout with 1.0V threshold; shutdown draws <0.6µA. |
| Pin 5 | RT | Resistor-to-ground sets switching frequency (e.g., 66.5kΩ = 700kHz). |
| Pin 6 | PG | Open-drain Power Good flag - low until VOUT is within ±7.5% of 5V. |
| Pin 7 | SYNC | Synchronization input - ground for Burst Mode, INTVCC for forced continuous, external clock for sync. |
| Pins 9–10 | OUT | Fixed 5V output node - connects directly to VOUT; internal 10MΩ divider sets regulation point. |
| Pin 11 | BIAS | Bias supply input - tie to VOUT ≥3.3V to reduce VIN current and improve efficiency. |
| Pin 12 | INTVCC | Internal 3.3V LDO output - powers control circuitry; decouple with ≥1µF ceramic cap. |
| Pin 14 | BST | Bootstrap supply - requires 0.1µF capacitor to SW for high-side gate drive. |
| Pins 15–16 | SW | Switch node - connects to inductor and BST capacitor; minimize PCB trace area. |
| Pin 17 (Exposed Pad) | GND | Power and signal ground - must be soldered to PCB thermal pad for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current at no load preserves battery life in always-on automotive modules. |
| Fixed 5V Output | Eliminates external feedback network - reduces BOM count and layout sensitivity. |
| 30ns Minimum On-Time | Enables single-stage 48V-to-5V conversion at 700kHz without duty-cycle limitation. |
| Integrated Power Good Flag | PG provides system-level sequencing and fault detection with ±7.5% accuracy and µs-scale delays. |
| AEC-Q100 Qualified | Rated for automotive applications (Grade 1: –40°C to 125°C junction temperature). |
| Low EMI Silent Switcher® Architecture | Controlled edge rates and symmetrical layout reduce conducted/radiated emissions. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering USB-C PD controllers and display interface ICs in head units requiring stable 5V from 12V/24V battery rails with low standby consumption. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering 1.2A with Power Good signaling for system reset coordination. Use Value: 6µA quiescent current extends vehicle battery life during extended parking; AEC-Q100 qualification ensures reliability under vibration and thermal cycling. | Use Scenario: Providing regulated 5V to low-power wireless sensor transceivers (e.g., LoRaWAN, NB-IoT) deployed in remote industrial environments. IC Role / Device Role / Timing Role: Standby-optimized DC/DC converter enabling multi-year operation on primary lithium batteries. Use Value: Burst Mode maintains 10mVP-P ripple at zero load while consuming only 6µA - critical for energy harvesting and battery longevity. |
| 48V Mild Hybrid Vehicle ECUs | Programmable Logic Controller (PLC) I/O Modules |
Use Scenario: Generating 5V for microcontrollers and CAN transceivers in 48V onboard chargers and DC/DC converters. IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting wide VIN range (6V–60V) with fast line/load transient response. Use Value: 30ns min on-time allows direct 48V-to-5V conversion at 700kHz, avoiding cascaded stages and improving system efficiency by ~3%. | Use Scenario: Powering isolated digital I/O circuits in factory automation PLCs where EMC robustness and long-term stability are mandatory. IC Role / Device Role / Timing Role: Immune-to-noise 5V supply with low EMI and ±7.5% PG monitoring for diagnostics and watchdog integration. Use Value: Silent Switcher® design meets EN 55022 Class B emissions limits without shielding; exposed-pad MSOP ensures thermal margin at full load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5V synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8619IMSE-5#PBF | Same silicon, extended temperature grade (–40°C to 125°C guaranteed over full range vs. assured-by-design for E-grade). | Required for mission-critical automotive safety systems needing full-range characterization. | Select IMSE-5 for ASIL-B designs or industrial applications requiring guaranteed specs at extremes. |
| LT8640S-5#PBF | Higher 4A output, 3.4V–42V input, 2.2MHz max fSW, but larger 20-lead QFN package and higher IQ (2.5µA typical in Burst Mode). | Used where higher current or smaller inductors are needed; not drop-in due to pinout and package change. | Choose LT8640S-5 only if >1.2A is required or 2.2MHz operation is mandatory for size reduction. |
Compared with LT8619IMSE-5#PBF, the LT8619EMSE-5#PBF offers identical electrical performance with cost-optimized characterization, while LT8640S-5#PBF trades pin compatibility for higher current and frequency - neither is pin-compatible, but both serve adjacent 5V buck use cases.
Availability
LT8619EMSE-5#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor nodes, 48V mild hybrid ECUs, and programmable logic controller I/O modules requiring stable component supply, AEC-Q100 compliance, and ultralow quiescent current.
Supply support for LT8619EMSE-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 precision instrumentation, communications, and automotive markets.
The LT8619 product line delivers high-efficiency, ultralow-IQ synchronous buck regulators for automotive and industrial applications demanding wide VIN range, small solution size, and reliable operation across extreme temperatures.
FAQ
What is the output voltage tolerance of the LT8619EMSE-5#PBF over temperature and line?
The LT8619EMSE-5#PBF delivers a fixed 5.0V output with ±0.5% initial accuracy and ±0.03%/V line regulation. Over the full –40°C to 125°C operating junction temperature range, output remains within ±0.5% of 5.0V (4.975V–5.025V) under all specified conditions, as confirmed in the Electrical Characteristics table (Rev. C datasheet, Page 3).
Can the LT8619EMSE-5#PBF operate from a 48V input to deliver 5V at 1.2A?
Yes, the LT8619EMSE-5#PBF supports 3V to 60V input and is validated for 48V-to-5V conversion at 1.2A. Its 30ns minimum on-time enables ~11% duty cycle at 700kHz, and efficiency reaches 87% at 48VIN/5VOUT/1.2A (Figure G06, Rev. C datasheet, Page 5). Thermal design must account for θJA = 40°C/W in the MSOP package.
How does the SYNC pin affect LT8619EMSE-5#PBF operation modes?
The SYNC pin configures three distinct modes: grounding enables Burst Mode (6µA IQ, 10mVP-P ripple); floating enables pulse-skipping mode (higher IQ, lower ripple); connecting to INTVCC or an external clock forces continuous conduction (fixed frequency, best EMI control). All modes retain the LT8619EMSE-5#PBF's 5V regulation and PG functionality.
Is the LT8619EMSE-5#PBF pin-compatible with other LT8619 variants?
No - the LT8619EMSE-5#PBF shares the same 16-lead MSOP package and pinout as LT8619EMSE#PBF and LT8619IMSE-5#PBF, but differs functionally: LT8619EMSE#PBF uses FB pin for adjustable output, while LT8619EMSE-5#PBF uses OUT pins (9–10) for fixed 5V. Pin mapping is identical, but FB/OUT pin roles are mutually exclusive per variant.
What thermal considerations apply to the LT8619EMSE-5#PBF in continuous 1.2A operation?
At 1.2A continuous load, the LT8619EMSE-5#PBF requires proper thermal management via its exposed pad (Pin 17). With θJA = 40°C/W and typical power dissipation of ~0.4W (at 12VIN→5V), junction temperature rise is ~16°C above ambient. A 4-layer PCB with ≥2 in² copper pour under the exposed pad ensures safe operation at 125°C ambient.
LT8619EMSE-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:
- 0°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8619EMSE-5#PBF FAQ
1.How can I place an order for LT8619EMSE-5#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619EMSE-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 LT8619EMSE-5#PBF reliable?
The price and inventory of LT8619EMSE-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 LT8619EMSE-5#PBF is usually 5 days.
3.What payment methods are accepted for LT8619EMSE-5#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619EMSE-5#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619EMSE-5#PBF?
LT8619EMSE-5#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619EMSE-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 LT8619EMSE-5#PBF?
For technical support, including LT8619EMSE-5#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619EMSE-5#PBF requirements.
6.How does Aetrix verify that LT8619EMSE-5#PBF is sourced from the original manufacturer or authorized distributors?
All LT8619EMSE-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 LT8619EMSE-5#PBF meets industry standards.
7.What is the process for return or replacement of LT8619EMSE-5#PBF?
All LT8619EMSE-5#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619EMSE-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 LT8619EMSE-5#PBF part is unused and in its original packaging.
Return procedure for LT8619EMSE-5#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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