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Analog Devices Inc. LT8619EMSE#TRPBF
- Part No.:
- LT8619EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8619EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,082
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Product details
Overview
LT8619EMSE#TRPBF from Analog Devices is a 60V, 1.2A synchronous monolithic buck regulator with 6µA quiescent current in Burst Mode, 30ns minimum on-time, and ±7.5% power-good accuracy. It integrates top/bottom MOSFETs, internal compensation, and operates from 3V to 60V input-designed for automotive 12V/24V/48V systems requiring ultra-low standby power.
For engineers reviewing the LT8619EMSE#TRPBF datasheet, LT8619EMSE#TRPBF pinout, LT8619EMSE#TRPBF application, or LT8619EMSE#TRPBF equivalent, key selection criteria include ultralow IQ at no load, AEC-Q100 qualification, 16-lead MSOP thermal performance (θJA = 40°C/W), and programmable 300kHz–2.2MHz switching frequency via RT resistor.
Technical Context
The LT8619EMSE#TRPBF uses peak current mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its 30ns minimum on-time supports high VIN-to-VOUT step-down ratios (e.g., 48V→3.3V at 700kHz), while the integrated 0.8V reference and FB/OUT pin configuration defines regulation mode.
Burst Mode operation shuts down control circuitry between switching bursts to achieve 6µA IQ, while SYNC pin logic selects between Burst Mode (grounded), pulse-skipping (floating), or forced continuous mode (tied to INTVCC or external clock). The EN/UV pin provides accurate 1V threshold shutdown and VIN undervoltage lockout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports wide automotive and industrial supply rails without pre-regulation. |
| Output Current | 1.2A continuous - sufficient for microcontroller cores, sensors, and CAN transceivers in embedded systems. |
| Quiescent Current | 6µA in Burst Mode - enables >1-year battery life in always-on vehicle modules powered from 12V lead-acid. |
| Switching Frequency | 300kHz to 2.2MHz (RT-programmable) - allows EMI optimization and compact magnetics selection. |
| Power Good Accuracy | ±7.5% window - ensures reliable system reset and sequencing in safety-critical applications. |
| Min On-Time | 30ns - enables high step-down ratio operation (e.g., 48V→3.3V at 700kHz) without pulse skipping. |
| Package | 16-lead MSOP with exposed pad - θJA = 40°C/W enables 1.2A operation at 125°C ambient without heatsink. |
Pinout & Package
LT8619EMSE#TRPBF is housed in a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND). The exposed pad must be soldered to PCB copper for thermal management (θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Main input supply | Supplies internal circuitry and top switch; requires local 10µF ceramic bypass to GND. |
| EN/UV (Pin 4) | Enable / UVLO input | 1V rising threshold enables operation; falling below 0.56V forces <0.6µA shutdown current. |
| RT (Pin 5) | Frequency set resistor | Resistor to GND programs switching frequency (300kHz–2.2MHz); no external voltage allowed. |
| PG (Pin 6) | Open-drain Power Good | Asserts high when VOUT within ±7.5%; requires external pull-up to INTVCC/VOUT (≤6V). |
| SYNC (Pin 7) | Mode control / sync input | Ground = Burst Mode; float = pulse-skipping; INTVCC/ext clock = forced continuous/sync. |
| FB (Pin 9, 10) | Feedback input | Regulated to 0.8V; connects to resistor divider for adjustable output (LT8619 variant only). |
| BIAS (Pin 11) | Internal LDO bias supply | Tie to VOUT ≥3.3V to reduce VIN current draw and improve efficiency. |
| INTVCC (Pin 12) | Internal 3.3V LDO output | Powers control circuitry; max 20mA; decouple with ≥1µF ceramic to GND. |
| BST (Pin 14) | Bootstrap supply | Drives top MOSFET gate; requires 0.1µF ceramic capacitor to SW. |
| SW (Pin 15, 16) | Switch node | Connects to inductor and BST capacitor; minimize trace area for low EMI. |
| GND (Pin 17, Exposed Pad) | Power and signal ground | Exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA at no load enables multi-year battery operation in always-on automotive modules. |
| AEC-Q100 Grade | Qualified for automotive applications (–40°C to +125°C junction), supporting under-hood deployment. |
| Integrated Power Switches | Top/bottom MOSFETs with 0.45Ω/0.22Ω RDS(on) eliminate external FETs and gate drivers. |
| Programmable Soft-Start | 0.2ms internal ramp prevents inrush current; configurable via CSS capacitor if needed. |
| Low-EMI Silent Switcher Architecture | Controlled SW edge rates and optimized layout reduce conducted/radiated emissions without shielding. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering display controllers and audio codecs in head units with 12V battery input and strict 100µA sleep budget. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter delivering regulated rail with Burst Mode IQ ≤6µA. Use Value: Enables >5-year battery backup during vehicle off-state without parasitic drain. | Use Scenario: Providing stable 3.3V supply to wireless sensor nodes in factory automation, operating from 24V DC bus. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 30ns min on-time for 24V→3.3V conversion at 700kHz. Use Value: Maintains >90% efficiency across 10µA–1.2A load range, reducing thermal stress in sealed enclosures. |
| 48V Mild Hybrid Vehicle ECUs | Medical Portable Diagnostic Equipment |
Use Scenario: Generating 5V rail for microcontrollers and CAN FD transceivers in 48V starter-generator systems. IC Role / Device Role / Timing Role: Input-capable 60V buck regulator with AEC-Q100 qualification and ±7.5% PG accuracy. Use Value: Survives load-dump transients up to 60V and ensures safe MCU reset via precise PG signaling. | Use Scenario: Powering FPGA-based imaging subsystems in portable ultrasound devices using Li-ion battery (3.0–4.2V) and 12V adapter inputs. IC Role / Device Role / Timing Role: Wide-input buck regulator supporting both battery and adapter modes with seamless switchover. Use Value: Delivers 1.2A at 92% efficiency from 12V input, extending runtime while meeting IEC 60601 EMI 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 |
|---|---|---|---|
| LT8640SEMSE#TRPBF | Higher 4A output, 2.5µA IQ, same 60V rating and MSOP-16 package; includes spread-spectrum modulation. | Preferred for higher-current loads (>1.2A) or stricter EMI requirements where spread spectrum is beneficial. | Select when scaling power delivery beyond 1.2A or needing certified CISPR 25 Class 5 compliance. |
| MPQ4420AGL-A-Z | 40V max input, 2A output, 17µA IQ, QFN-10 package; lacks AEC-Q100 qualification and programmable frequency. | Suitable for cost-sensitive industrial supplies where 60V rating and automotive qualification are unnecessary. | Choose for non-automotive 24V systems prioritizing cost over ultra-low IQ or wide VIN range. |
Compared with LT8640SEMSE#TRPBF and MPQ4420AGL-A-Z, the LT8619EMSE#TRPBF uniquely balances 60V capability, 6µA IQ, AEC-Q100 qualification, and MSOP-16 thermal performance-making it optimal for space-constrained automotive modules requiring long-term battery retention.
Availability
LT8619EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, 48V hybrid vehicle ECUs, and industrial sensor nodes requiring stable component supply with AEC-Q100 assurance and extended temperature support.
Supply support for LT8619EMSE#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 precision instrumentation, communications, and automotive markets.
The LT8619 product line delivers high-voltage, ultralow-IQ synchronous buck regulators for automotive and industrial applications where wide input range, reliability, and minimal standby power are critical.
FAQ
What is the maximum input voltage rating for the LT8619EMSE#TRPBF?
The LT8619EMSE#TRPBF has an absolute maximum input voltage rating of 60V on the VIN pin, enabling direct connection to automotive 48V mild-hybrid buses and surviving ISO 7637-2 load-dump transients without external protection.
Does the LT8619EMSE#TRPBF support fixed 5V output without external resistors?
No-the LT8619EMSE#TRPBF is the standard LT8619 variant with FB pin for adjustable output; fixed 5V is provided by the LT8619-5 family (e.g., LT8619EMSE-5#TRPBF). The LT8619EMSE#TRPBF requires an external resistor divider to set VOUT.
How does the SYNC pin affect quiescent current in the LT8619EMSE#TRPBF?
Grounding the SYNC pin enables Burst Mode operation, achieving 6µA IQ at no load. Floating SYNC enables pulse-skipping mode (~10µA IQ), while tying SYNC to INTVCC enables forced continuous mode (3mA IQ), trading efficiency for lower output ripple.
Is the LT8619EMSE#TRPBF qualified for automotive applications?
Yes-the 'E' grade in LT8619EMSE#TRPBF indicates AEC-Q100 qualification for automotive use across –40°C to +125°C junction temperature, with full characterization including thermal, ESD, and lifetime reliability testing per automotive standards.
What thermal performance can be expected from the LT8619EMSE#TRPBF in MSOP package?
The LT8619EMSE#TRPBF in 16-lead MSOP achieves θJA = 40°C/W with proper PCB copper pour on the exposed pad (Pin 17 = GND), allowing 1.2A continuous output at 125°C ambient without derating when mounted on 2oz copper with ≥2 cm² thermal pad.
LT8619EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 59.4V
- 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#TRPBF FAQ
1.How can I place an order for LT8619EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619EMSE#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 LT8619EMSE#TRPBF reliable?
The price and inventory of LT8619EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8619EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8619EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619EMSE#TRPBF?
LT8619EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619EMSE#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 LT8619EMSE#TRPBF?
For technical support, including LT8619EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619EMSE#TRPBF requirements.
6.How does Aetrix verify that LT8619EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8619EMSE#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 LT8619EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8619EMSE#TRPBF?
All LT8619EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619EMSE#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 LT8619EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8619EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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