My Inquiry
My Account
Analog Devices Inc. LT8619EMSE#PBF
- Part No.:
- LT8619EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8619EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 1.2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,343
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8619EMSE#PBF from Analog Devices is a 60V, 1.2A synchronous monolithic buck regulator in a 16-lead MSOP package with exposed pad, delivering 92% efficiency at 0.5A/5VOUT from 12VIN, 6µA quiescent current in Burst Mode, and 30ns minimum on-time for high VIN-to-VOUT step-down in automotive and industrial power supplies.
For engineers reviewing the LT8619EMSE#PBF datasheet, LT8619EMSE#PBF pinout, LT8619EMSE#PBF application, or LT8619EMSE#PBF equivalent, key selection criteria include ultralow IQ regulation across 3V–60V input, ±7.5% power-good flag accuracy, AEC-Q100 qualification, and programmable 300kHz–2.2MHz switching frequency via RT resistor.
Technical Context
The LT8619EMSE#PBF implements peak current mode control with internal compensation, enabling fast transient response and stable loop behavior using small inductors. Its integrated top and bottom MOSFETs feature 0.45Ω and 0.22Ω typical RDS(ON), respectively, supporting high-efficiency synchronous operation down to 3.3V output.
Burst Mode operation maintains 10mVP-P output ripple at no load while drawing only 6µA from 12VIN; forced continuous mode (via SYNC pin) enables fixed-frequency operation synchronized to external clocks up to 2.2MHz, with oscillator foldback during overcurrent events to limit inductor current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 60V - supports direct connection to 12V, 24V, and 48V vehicle batteries 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 |
| Switching Frequency | 300kHz to 2.2MHz (RT-programmable) - allows EMI optimization and compact magnetics selection |
| Power Good Accuracy | ±7.5% of regulated VOUT - provides reliable system-level power sequencing and fault detection |
| Minimum On-Time | 30ns - enables high step-down ratios (e.g., 48V→3.3V) at 2MHz without pulse skipping |
| Package Thermal Resistance | θJA = 40°C/W - exposed pad ensures low junction-to-ambient rise under full load at 125°C ambient |
Pinout & Package
LT8619EMSE#PBF uses a thermally enhanced 16-lead plastic MSOP package with exposed pad (Pin 17), requiring soldering to PCB ground plane for optimal thermal performance (θJA = 40°C/W, θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1, 3, 13 | No Connect (NC) | Unbonded; must remain unconnected on PCB layout |
| Pin 2 (VIN) | Main Input Supply | Supplies internal circuitry and top switch; requires local 10µF ceramic bypass capacitor |
| Pin 4 (EN/UV) | Enable / UVLO Input | 1.0V threshold enables shutdown below 0.56V; resistor divider sets input undervoltage lockout |
| Pin 5 (RT) | Frequency Set Resistor | GND-connected resistor programs switching frequency (300kHz–2.2MHz); no external voltage allowed |
| Pin 6 (PG) | Open-Drain Power Good | Asserts high when VFB or VOUT is within ±7.5%; requires external pull-up to INTVCC/VOUT |
| Pin 7 (SYNC) | Sync Clock Input | Ground = Burst Mode; float = pulse-skipping; INTVCC = forced continuous; external clock = sync mode |
| Pins 9–10 (FB) | Feedback Input | Regulates to 0.8V reference; connects to resistor divider tap; phase lead capacitor (4.7–10pF) required |
| Pin 11 (BIAS) | Bias Supply Input | Tie to VOUT ≥3.3V to reduce VIN current draw; improves light-load efficiency |
| Pin 12 (INTVCC) | Internal 3.3V LDO Output | Powers control logic; max 20mA; decouple with ≥1µF ceramic capacitor to GND |
| Pin 14 (BST) | Bootstrap Capacitor Node | Requires 0.1µF ceramic capacitor between BST and SW for high-side gate drive |
| Pins 15–16 (SW) | Switch Node | Connects to inductor and BST capacitor; must be minimized on PCB for low EMI |
| Exposed Pad (Pin 17) | Thermal Ground | Must be soldered to PCB GND plane; primary thermal path for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 6µA IQ in Burst Mode enables >10-year battery life in always-on automotive modules |
| Low EMI Silent Switcher Architecture | Integrated BST capacitor routing and fast, clean switching edges minimize conducted/radiated emissions |
| AEC-Q100 Qualified | Rated for –40°C to +125°C junction temperature; qualified for automotive powertrain and body electronics |
| Internal Soft-Start | 200µs controlled ramp prevents inrush current; PG asserts ~660µs after EN/UV rising edge |
| Overvoltage Protection | 0.83V FB overvoltage comparator disables top switch and activates bottom switch to clamp overshoot |
Applications
| 12V Automotive Systems | 48V Electric Vehicles |
|---|---|
Use Scenario: Powering infotainment head units and ADAS camera modules from vehicle battery with cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter providing regulated supply with 60V absolute max input rating. Use Value: Survives 60V load-dump transients without external protection; 6µA IQ extends backup battery runtime. | Use Scenario: Converting 48V traction bus to 5V for gateway ECUs and domain controllers in hybrid powertrains. IC Role / Device Role / Timing Role: High-ratio synchronous buck delivering 1.2A at 5V with 30ns min on-time to avoid pulse skipping. Use Value: Enables single-stage conversion from 48V→5V at 2MHz, reducing solution size vs. two-stage approaches. |
| Industrial Sensors | Railway Signaling |
Use Scenario: Powering isolated analog front-ends and wireless transceivers in remote condition-monitoring nodes. IC Role / Device Role / Timing Role: Primary DC/DC regulator supplying 3.3V to ultra-low-power MCU and RF ICs. Use Value: 10mVP-P ripple in Burst Mode avoids noise coupling into precision ADC references. | Use Scenario: Providing fail-safe 5V supply for safety-critical signaling logic in rolling stock control systems. IC Role / Device Role / Timing Role: AEC-Q100-compliant buck regulator with ±7.5% PG flag for redundant power monitoring. Use Value: PG assertion within 660µs enables deterministic startup sequencing per EN 50126/50128 requirements. |
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#PBF | Higher 4A output current; 2.2µA IQ; same 60V input; adds spread-spectrum modulation | Targets higher-power loads (e.g., multi-rail PMICs); not pin-compatible due to different pin count and function mapping | Select when >1.2A output or lower EMI is required; redesign PCB and adjust compensation network |
| MPQ4420AGL-A-Z | 3.5A output; 17µA IQ; 45V max input; no SYNC or PG pins; QFN-12 package | Suitable for cost-sensitive industrial supplies where AEC-Q100 and ultralow IQ are not mandatory | Choose for non-automotive applications needing higher current but accepting higher IQ and missing PG/SYNC features |
Compared with LT8640SEMSE#PBF and MPQ4420AGL-A-Z, the LT8619EMSE#PBF uniquely balances 60V input, 1.2A capability, 6µA IQ, AEC-Q100 qualification, and PG/SYNC functionality in a compact MSOP package-making it optimal for space-constrained, battery-backed automotive modules requiring precise power sequencing and long-term reliability.
Availability
LT8619EMSE#PBF is available at Aetrix Electronics and suitable for 12V automotive systems, 48V electric vehicles, and industrial sensor nodes requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8619EMSE#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 LT8619EMSE#PBF belongs to the Silent Switcher® monolithic buck regulator product line, engineered specifically for automotive and industrial applications demanding ultralow EMI, ultralow quiescent current, and wide-input-voltage operation with high reliability.
FAQ
What is the maximum input voltage rating for the LT8619EMSE#PBF?
The LT8619EMSE#PBF has an absolute maximum input voltage rating of 60V on the VIN pin, enabling direct connection to 48V battery systems and survival through automotive load-dump transients. This rating is validated per Absolute Maximum Ratings table in the datasheet and applies across the full –40°C to +125°C operating junction temperature range.
Does the LT8619EMSE#PBF support fixed 5V output without external feedback resistors?
No - the LT8619EMSE#PBF is the standard version with adjustable output via FB pin (0.8V reference). For fixed 5V output, use LT8619EMSE-5#PBF, which integrates a 10MΩ internal feedback divider and uses OUT pin instead of FB. The LT8619EMSE#PBF requires external R1/R2 resistors to set VOUT.
How does the SYNC pin affect operating mode and efficiency in the LT8619EMSE#PBF?
The SYNC pin configures three distinct modes: grounded = Burst Mode (6µA IQ, 10mVP-P ripple); floating = pulse-skipping mode (higher IQ, lower ripple); tied to INTVCC = forced continuous mode (fixed frequency, highest IQ). External clock input synchronizes switching to that frequency while maintaining forced continuous operation.
Is the LT8619EMSE#PBF qualified for automotive applications?
Yes - the LT8619EMSE#PBF is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C), with controlled manufacturing, extended reliability testing, and automotive-grade packaging. It is explicitly listed in the "AUTOMOTIVE PRODUCTS" section of the datasheet ordering table.
What thermal design considerations apply to the LT8619EMSE#PBF MSOP package?
The LT8619EMSE#PBF uses a 16-lead MSOP with exposed pad (Pin 17) that must be soldered to a PCB ground plane. With θJA = 40°C/W, thermal performance depends critically on copper area and via count under the pad. Analog Devices recommends ≥4 thermal vias (0.3mm diameter) connecting the pad to inner/outer ground planes to maintain TJ ≤125°C at full 1.2A load.
LT8619EMSE#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:
- 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#PBF FAQ
1.How can I place an order for LT8619EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8619EMSE#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#PBF reliable?
The price and inventory of LT8619EMSE#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#PBF is usually 5 days.
3.What payment methods are accepted for LT8619EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8619EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8619EMSE#PBF?
LT8619EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8619EMSE#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#PBF?
For technical support, including LT8619EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8619EMSE#PBF requirements.
6.How does Aetrix verify that LT8619EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8619EMSE#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#PBF meets industry standards.
7.What is the process for return or replacement of LT8619EMSE#PBF?
All LT8619EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8619EMSE#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#PBF part is unused and in its original packaging.
Return procedure for LT8619EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8619EMSE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
