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Analog Devices Inc. LT8619EDD#TRPBF
- Part No.:
- LT8619EDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LT8619EDD#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 1.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,441
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Product details
Overview
LT8619EDD#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 up to 1.2A, and supports forced continuous or synchronized operation up to 2.2MHz - ideal for automotive 12V/24V/48V systems requiring ultra-low standby power.
For engineers reviewing the LT8619EDD#TRPBF datasheet, LT8619EDD#TRPBF pinout, LT8619EDD#TRPBF application, or LT8619EDD#TRPBF equivalent, key selection criteria include its 6µA no-load IQ, 30ns min-on-time for high VIN/VOUT ratios, exposed-pad 10-lead DFN thermal performance, AEC-Q100 qualification, and programmable frequency via RT resistor.
Technical Context
The LT8619EDD#TRPBF uses peak-current-mode control with internal compensation, enabling fast transient response and stable operation with small inductors. Its integrated top/bottom MOSFETs feature 0.45Ω/0.22Ω typical RDS(ON), supporting high efficiency across wide load ranges.
Burst Mode operation maintains 10mVP-P output ripple at no load while drawing only 6µA from 12VIN→3.3VOUT. The SYNC pin enables seamless transition between Burst Mode (grounded), pulse-skipping (floating), and forced continuous/synchronized mode (tied to INTVCC or external clock).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports direct connection to automotive battery rails including cold-crank (4.5V) and load-dump (60V) transients. |
| Output Current | 1.2A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in embedded automotive modules. |
| Quiescent Current | 6µA in Burst Mode at 12VIN→3.3VOUT - enables >1-year battery life in always-on vehicle subsystems. |
| Min On-Time | 30ns - allows stable 3.3V/5V regulation from 48V input without external step-down stages. |
| Power Good Accuracy | ±7.5% window on FB/OUT - provides reliable system reset and sequencing control for downstream logic. |
| Switching Frequency | 300kHz to 2.2MHz (RT-programmable) - permits EMI optimization and compact magnetics design. |
| Package Thermal Resistance | θJA = 43°C/W (DFN-10) - enables 1.2A operation at +85°C ambient without heatsink when PCB copper area is optimized. |
Pinout & Package
LT8619EDD#TRPBF is housed in a thermally enhanced 10-lead 3mm × 3mm plastic DFN package with exposed pad (Pin 11) soldered to GND for low θJC = 10°C/W. The package supports high-power density layouts in space-constrained automotive ECUs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 2) | Main input supply | Supplies internal circuitry and top switch; requires local 10µF ceramic bypass to exposed GND pad. |
| EN/UV (Pin 4) | Enable / input UVLO control | 1.0V threshold enables precise input undervoltage lockout; draws <100nA bias current. |
| RT (Pin 5) | Frequency programming | Resistor-to-GND sets switching frequency; 66.5kΩ yields 700kHz nominal operation. |
| PG (Pin 6) | Open-drain Power Good flag | Asserts high when VOUT is within ±7.5%; requires external pull-up to INTVCC or VOUT (≤6V). |
| SYNC (Pin 7) | Mode control / sync input | Ground = Burst Mode; float = pulse-skipping; INTVCC = forced continuous; external clock = synchronized mode. |
| FB (Pin 9) | Feedback reference input | Regulates to 0.8V; connects to resistor divider for adjustable output; supports phase-lead capacitor for stability. |
| BIAS (Pin 11) | Internal LDO bias supply | Tie to VOUT ≥3.3V to reduce VIN current draw and improve light-load efficiency. |
| SW (Pin 10) | Switch node | Connects to inductor and BST capacitor; must be minimized in PCB layout to reduce EMI and switching losses. |
| BST (Pin 9) | Bootstrap supply | Requires 0.1µF ceramic capacitor between BST and SW to drive high-side MOSFET gate. |
| GND (Pin 11, Exposed Pad) | Power and signal ground | Exposed pad is electrically GND and must be soldered to large PCB copper area for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 6µA input current at no load preserves battery energy in always-on automotive modules. |
| Fast Minimum On-Time | 30ns enables high step-down ratios (e.g., 48V→3.3V) without requiring pre-regulation stages. |
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature - validated for under-hood and transmission-control applications. |
| Low-EMI Silent Switcher Architecture | Integrated split-pin SW/GND layout and fast, controlled switching edges minimize conducted and radiated emissions. |
| Programmable Soft-Start | 0.2ms internal ramp prevents inrush current; compatible with external CSS for custom timing. |
Applications
| Automotive Body Control Module (BCM) | Industrial 24V PLC I/O Supply |
|---|---|
Use Scenario: Powering CAN transceivers, LIN drivers, and microcontroller peripherals in door modules and lighting controllers. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter supplying always-on logic and wake-up circuitry. Use Value: 6µA quiescent current extends vehicle battery life during extended parking; 60V rating withstands load-dump transients. | Use Scenario: Generating isolated 5V rail for digital I/O expansion cards in programmable logic controllers. IC Role / Device Role / Timing Role: High-efficiency, wide-input DC/DC stage converting 24V industrial bus to stable logic supply. Use Value: 30ns min-on-time supports full 24V→5V conversion without external pre-buck; AEC-Q100 reliability ensures field longevity. |
| 48V Mild Hybrid Vehicle Telematics | Electric Vehicle Battery Management System (BMS) Auxiliary Supply |
Use Scenario: Providing 3.3V power to GPS, cellular modems, and OTA update processors in 48V architecture vehicles. IC Role / Device Role / Timing Role: Input-stage buck regulator accepting 36–58V battery range and delivering clean, low-noise logic voltage. Use Value: 2.2MHz max switching frequency enables use of tiny 2.2µH inductors; low EMI meets CISPR-25 Class 5 requirements. | Use Scenario: Powering analog front-end ICs, ADC references, and isolation gate drivers in multi-cell BMS stacks. IC Role / Device Role / Timing Role: Secondary supply derived from main 48V battery or auxiliary 12V rail, delivering precise 5V for sensing circuits. Use Value: ±7.5% PG accuracy ensures reliable fault detection; 1.2A output supports multiple sensor channels simultaneously. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8640SEDD#TRPBF | Higher 4A output, 2.5µA IQ, same 60V rating and DFN-10 package; includes spread-spectrum modulation. | Targets higher-current loads (e.g., ADAS cameras); not drop-in due to different FB divider ratio and pinout. | Select when >1.2A output or lower EMI is required; verify feedback network and thermal layout. |
| MPQ4420AGL-A-Z | 40V max input, 2A output, 17µA IQ, QFN-10 package; lacks SYNC pin and PG flag. | Suitable for cost-sensitive 12V/24V industrial supplies where AEC-Q100 and ultralow IQ are not mandatory. | Choose for non-automotive applications with ≤40V input and relaxed standby power requirements. |
Compared with LT8640SEDD#TRPBF and MPQ4420AGL-A-Z, the LT8619EDD#TRPBF uniquely balances 60V capability, 6µA IQ, AEC-Q100 qualification, and PG flag in a compact DFN - making it optimal for safety-critical, battery-sensitive automotive subsystems where both input ruggedness and standby efficiency are essential.
Availability
LT8619EDD#TRPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24V PLCs, and 48V mild hybrid telematics requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LT8619EDD#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.
The LT8619EDD#TRPBF 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 maximum input voltage rating for the LT8619EDD#TRPBF?
The LT8619EDD#TRPBF has an absolute maximum input voltage rating of 60V on the VIN pin, and it is specified to operate continuously from 3V to 60V. This makes the LT8619EDD#TRPBF suitable for automotive applications subject to load-dump transients up to 60V, as well as industrial 48V systems.
Does the LT8619EDD#TRPBF support fixed 5V output without external resistors?
No - the LT8619EDD#TRPBF is the standard adjustable version with FB pin; it requires an external resistor divider to set output voltage. The fixed 5V variant is the LT8619-5 (e.g., LT8619EMSE-5#TRPBF), which uses the OUT pin instead of FB and integrates the feedback divider internally.
How does the SYNC pin affect operating mode and efficiency in the LT8619EDD#TRPBF?
The SYNC pin configures three distinct modes: grounded → Burst Mode (6µA IQ); floating → pulse-skipping mode (higher IQ, lower ripple); tied to INTVCC or external clock → forced continuous/synchronized mode (fixed frequency, highest EMI). The LT8619EDD#TRPBF's efficiency vs. load curve shifts significantly across these modes.
Is the LT8619EDD#TRPBF qualified for automotive applications?
Yes - the LT8619EDD#TRPBF is rated for –40°C to +125°C junction temperature and is explicitly listed in the datasheet as AEC-Q100 qualified for automotive applications. It is manufactured with controlled processes and undergoes stress testing per automotive reliability standards.
What thermal considerations apply to the LT8619EDD#TRPBF in its 10-lead DFN package?
The LT8619EDD#TRPBF in the 10-lead DFN package has θJA = 43°C/W and θJC = 10°C/W. To achieve rated 1.2A output at +85°C ambient, the exposed GND pad (Pin 11) must be soldered to ≥2 cm² of 2-oz copper with ≥4 thermal vias to inner/ground planes. Without proper thermal design, derating is required above 60°C ambient.
LT8619EDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN 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:
- 10-DFN (3x3)
LT8619EDD#TRPBF FAQ
1.How can I place an order for LT8619EDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619EDD#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 LT8619EDD#TRPBF reliable?
The price and inventory of LT8619EDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8619EDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8619EDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619EDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619EDD#TRPBF?
LT8619EDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619EDD#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 LT8619EDD#TRPBF?
For technical support, including LT8619EDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619EDD#TRPBF requirements.
6.How does Aetrix verify that LT8619EDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8619EDD#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 LT8619EDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8619EDD#TRPBF?
All LT8619EDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619EDD#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 LT8619EDD#TRPBF part is unused and in its original packaging.
Return procedure for LT8619EDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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