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Analog Devices Inc. LT8619IMSE#TRPBF
- Part No.:
- LT8619IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8619IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,367
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Product details
Overview
LT8619IMSE#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 operates from 3V to 60V input, delivers regulated output via internal compensation and peak-current-mode control, and is used in automotive 12V/24V/48V systems requiring ultra-low IQ and high efficiency at light loads.
For engineers reviewing the LT8619IMSE#TRPBF datasheet, LT8619IMSE#TRPBF pinout, LT8619IMSE#TRPBF application, or LT8619IMSE#TRPBF equivalent, key selection considerations include its 16-lead MSOP package with exposed pad, AEC-Q100 qualification, programmable 300kHz–2.2MHz switching frequency via RT resistor, and support for Burst Mode, pulse-skipping, and forced continuous/synchronized operation.
Technical Context
The LT8619IMSE#TRPBF implements peak-current-mode control with internal compensation, enabling fast transient response and stable loop behavior using small inductors. Its oscillator supports resistor-programmed (RT pin) or external-synchronized (SYNC pin) operation across 300kHz–2.2MHz, with frequency foldback during overcurrent events to limit inductor current.
It integrates top and bottom MOSFETs with 0.45Ω/0.22Ω typical RDS(ON), employs an accurate 1V EN/UV threshold with 40mV hysteresis for VIN undervoltage lockout, and provides open-drain PG signaling when FB/OUT is within ±7.5% of regulation-critical for system power sequencing in automotive and industrial applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports wide-range automotive and industrial supplies without pre-regulation. |
| Output Current | 1.2A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in embedded systems. |
| Quiescent Current | 6µA in Burst Mode - enables >10-year battery life in always-on automotive modules (e.g., CAN nodes, telematics). |
| Min On-Time | 30ns - allows high step-down ratios (e.g., 48V→3.3V) at 2MHz without pulse skipping. |
| Power Good Accuracy | ±7.5% - ensures reliable system reset and sequencing in safety-critical applications. |
| Switching Frequency | 300kHz–2.2MHz (RT-programmable) - enables EMI optimization and compact magnetics design. |
| Package | 16-lead MSOP with exposed pad - provides low θJA = 40°C/W for thermally constrained automotive PCBs. |
Pinout & Package
LT8619IMSE#TRPBF is housed in a 16-lead plastic MSOP package with exposed thermal pad (Pin 17 = GND), θJA = 40°C/W, θJC = 10°C/W. The exposed pad must be soldered to PCB ground for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 3, 13 | No Connect (NC) | Unbonded; must remain floating - no routing or copper fill required. |
| Pin 2 (VIN) | Main Input Supply | Supplies internal circuitry and top switch; requires local 10µF+ ceramic bypass capacitor adjacent to pin. |
| Pin 4 (EN/UV) | Enable / UVLO Input | 1V threshold enables startup; resistor divider from VIN sets precise undervoltage lockout point. |
| Pin 5 (RT) | Frequency Set Resistor | Resistor to GND programs switching frequency (e.g., 66.5kΩ → 700kHz); critical for EMI compliance. |
| Pin 6 (PG) | Open-Drain Power Good | Signals VOUT regulation status; requires external pull-up (INTVCC/VOUT) for MCU reset assertion. |
| Pin 7 (SYNC) | Sync Clock Input | GND = Burst Mode; INTVCC = forced continuous; external clock = synchronized fixed-frequency operation. |
| Pin 9, 10 (FB) | Feedback Input | Regulates to 0.8V reference; connects to resistor divider for adjustable output (LT8619 variant). |
| Pin 11 (BIAS) | Bias Supply Input | Tie to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency. |
| Pin 12 (INTVCC) | Internal 3.3V LDO Output | Powers internal logic/drivers; decouple with ≥1µF ceramic capacitor to GND. |
| Pin 14 (BST) | Bootstrap Capacitor Node | Requires 0.1µF ceramic cap to SW for high-side gate drive; placement critical for reliability. |
| Pin 15, 16 (SW) | Switch Node | Connects to inductor and BST cap; must be minimized in area/layout to reduce EMI and ringing. |
| Pin 17 (GND) | Ground / Exposed Pad | Primary thermal path and signal return; must be soldered to large PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 6µA in Burst Mode enables >10-year battery life in always-on automotive ECUs without compromising regulation. |
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature - qualified for under-hood and ADAS applications. |
| Low-EMI Silent Switcher Architecture | Integrated split-pin SW/GND layout and fast, controlled switching edges minimize conducted/radiated emissions. |
| Programmable Frequency & Synchronization | RT-resistor tuning and SYNC pin support EMI band avoidance and multi-rail synchronization in complex systems. |
| Internal Soft-Start & Compensation | 200µs soft-start prevents inrush; internal compensation eliminates external compensation components and saves board space. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering CAN transceivers, LIN controllers, and door/window motor drivers in 12V vehicle architectures. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter supplying always-on logic rails with <6µA IQ to meet ISO 16750-2 sleep current requirements. Use Value: Enables 15-year battery standby without parasitic drain; AEC-Q100 qualification ensures reliability in vibration/temperature cycling environments. | Use Scenario: Generating isolated 5V/3.3V rails for digital I/O modules in factory automation PLCs operating from 24V DC bus. IC Role / Device Role / Timing Role: High-efficiency, wide-input buck regulator delivering stable output despite 24V bus ripple and load transients up to 1.2A. Use Value: 92% efficiency at 0.5A reduces thermal stress in sealed enclosures; 60V abs max rating accommodates 24V bus surges per IEC 61000-4-5. |
| 48V Mild Hybrid Vehicle DC-DC | Telecom Remote Radio Unit (RRU) |
Use Scenario: Step-down from 48V battery to 5V/3.3V for infotainment processors and ADAS camera modules. IC Role / Device Role / Timing Role: High-vin buck regulator supporting 48V input with 30ns min on-time to maintain regulation at 2MHz switching. Use Value: Enables compact 2MHz design with small 3.3µH inductor; 60V absolute max rating withstands load-dump transients up to 60V. | Use Scenario: Providing bias voltage to RF power amplifiers and analog front-end ICs in outdoor base station RRUs powered from -48V telecom supply. IC Role / Device Role / Timing Role: Intermediate 5V buck stage converting from isolated -48V-derived 12V rail, requiring low noise and high PSRR. Use Value: Burst Mode operation maintains <10mVP-P output ripple at no load; low EMI design avoids interference with sensitive RF receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3639EMSE#TRPBF | 40V max input, 1A output, 12µA IQ - lacks 60V rating and AEC-Q100 qualification. | Suitable for industrial 24V systems but not automotive 48V or load-dump environments. | Select only if input voltage stays ≤40V and automotive qualification is unnecessary. |
| MPQ4331AGL-AEC1-Z | 60V input, 1.2A, 17µA IQ, AEC-Q100 - higher quiescent current and no SYNC pin for external synchronization. | Acceptable for cost-sensitive automotive modules where EMI synchronization is not required. | Choose when budget constraints outweigh need for ultralow IQ and precise frequency control. |
Compared with LTC3639EMSE#TRPBF and MPQ4331AGL-AEC1-Z, the LT8619IMSE#TRPBF uniquely combines 60V rating, 6µA IQ, AEC-Q100 qualification, and full-frequency synchronization - making it the only option for high-reliability, low-power automotive applications demanding all three attributes.
Availability
LT8619IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, and 48V mild hybrid vehicle DC-DC converters requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8619IMSE#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, industrial automation, and automotive markets.
The LT8619IMSE#TRPBF belongs to the Silent Switcher® buck regulator product line, designed specifically for automotive and industrial applications demanding ultralow EMI, ultralow quiescent current, and robust operation across extreme temperature and voltage ranges.
FAQ
What is the maximum input voltage rating for the LT8619IMSE#TRPBF?
The LT8619IMSE#TRPBF has an absolute maximum input voltage rating of 60V on the VIN pin, as specified in the Absolute Maximum Ratings table. This allows safe operation in 48V automotive systems subject to load-dump transients. Operation above 60V risks permanent damage. The recommended operating range remains 3V to 60V per the Electrical Characteristics section.
Does the LT8619IMSE#TRPBF support fixed 5V output without external feedback resistors?
No - the LT8619IMSE#TRPBF is the standard LT8619 variant with adjustable output via FB pin (0.8V reference). For fixed 5V output, the LT8619-5 variant (e.g., LT8619IMSE-5#TRPBF) is required, which uses an internal 10MΩ feedback divider to regulate the OUT pin to 5V. The LT8619IMSE#TRPBF must use external resistors on FB to set VOUT.
How does the SYNC pin affect operating mode and efficiency in the LT8619IMSE#TRPBF?
The SYNC pin configures three distinct modes: grounding enables Burst Mode (6µA IQ, lowest light-load efficiency); floating enables pulse-skipping mode (higher IQ than Burst Mode but lower than forced continuous); connecting to INTVCC or an external clock forces continuous conduction mode. Forced continuous increases light-load IQ but improves output ripple and EMI predictability - critical for noise-sensitive applications.
Is the LT8619IMSE#TRPBF qualified for automotive applications?
Yes - the "I" grade in LT8619IMSE#TRPBF denotes operation from –40°C to +125°C junction temperature, and the device is explicitly AEC-Q100 qualified for automotive applications as stated in the Features and Ordering Information sections. It is approved for use in 12V, 24V, and 48V automotive systems including BCM, ADAS, and infotainment subsystems.
What thermal considerations apply to the LT8619IMSE#TRPBF's exposed pad?
Pin 17 is the exposed thermal pad and must be soldered directly to a large PCB ground plane to achieve θJA = 40°C/W. Failure to do so degrades thermal performance significantly - θJA may exceed 70°C/W with inadequate copper. The pad is electrically GND and serves as primary heat path; thermal vias (≥6x 0.3mm diameter) to inner/secondary ground layers are strongly recommended for sustained 1.2A operation.
LT8619IMSE#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:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8619IMSE#TRPBF FAQ
1.How can I place an order for LT8619IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619IMSE#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 LT8619IMSE#TRPBF reliable?
The price and inventory of LT8619IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8619IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8619IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619IMSE#TRPBF?
LT8619IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619IMSE#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 LT8619IMSE#TRPBF?
For technical support, including LT8619IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619IMSE#TRPBF requirements.
6.How does Aetrix verify that LT8619IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8619IMSE#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 LT8619IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8619IMSE#TRPBF?
All LT8619IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619IMSE#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 LT8619IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8619IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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