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Analog Devices Inc. LT8607EMSE#PBF
- Part No.:
- LT8607EMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8607EMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 750MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:818
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Product details
Overview
LT8607EMSE#PBF from Analog Devices is a 42V, 750mA synchronous step-down regulator in a thermally enhanced 10-lead MSOP package, featuring 2.5µA quiescent current in Burst Mode, 35ns minimum on-time, and internal compensation for fast transient response. It delivers regulated 5V output (fixed version) with >93% efficiency at 0.5A (12VIN→5VOUT) and supports spread-spectrum EMI reduction.
For engineers reviewing the LT8607EMSE#PBF datasheet, LT8607EMSE#PBF pinout, LT8607EMSE#PBF application, or LT8607EMSE#PBF equivalent, key selection considerations include ultralow-IQ operation down to 3.0V input, AEC-Q100 qualification for automotive use, programmable switching frequency (200kHz–2.2MHz), and precise 1V EN/UV threshold with hysteresis.
Technical Context
The LT8607EMSE#PBF implements peak current mode control with internal 0.778V reference and fixed-frequency PWM architecture. Its oscillator is resistor-programmable via the RT pin and supports external synchronization, burst-mode frequency foldback during start-up, and spread-spectrum modulation when SYNC is tied high.
It integrates dual NMOS power switches (375mΩ top, 240mΩ bottom), a 3.5V INTVCC regulator, and a precision open-drain Power Good (PG) comparator with ±8.5% threshold hysteresis. The MSOP package includes dedicated TR/SS for soft-start/tracking and SYNC for mode selection-functions omitted in DFN variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide industrial and automotive battery inputs including cold-crank and load-dump conditions. |
| Output Current | 750mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained systems. |
| Quiescent Current | 2.5µA in Burst Mode - enables >10-year battery life in always-on IoT and telematics applications. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of inductor size (e.g., 4.7µH at 2MHz) vs. efficiency trade-offs. |
| Feedback Reference | 0.778V ±12mV - enables accurate adjustable output or fixed 5V regulation with tight line/load regulation (0.04%/V). |
| Minimum On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability. |
| Power Good Threshold | ±8.5% of VFB - provides reliable system reset signaling with built-in hysteresis to prevent chatter. |
Pinout & Package
LT8607EMSE#PBF uses a 10-lead plastic MSOP package with exposed thermal pad (Pin 11 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap Supply | Provides gate drive voltage >VIN for top NMOS; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| SW | Switch Node | Connection point for inductor and BST capacitor; high di/dt node requiring minimized PCB loop area. |
| INTVCC | Internal 3.5V Regulator Output | Bypassed with ≥1µF low-ESR ceramic; powers internal logic/drivers; not for external loading. |
| RT | Frequency Set Input | Resistor-to-ground sets switching frequency (200kHz–2.2MHz); determines inductor/capacitor sizing. |
| SYNC | Mode Control & Sync Input | Ground = Burst Mode; float = pulse-skipping; INTVCC/high = spread-spectrum; no pin on DFN variants. |
| EN/UV | Enable / Input UVLO | 1.05V rising threshold with 50mV hysteresis; enables shutdown or programmable VIN undervoltage lockout. |
| TR/SS | Tracking / Soft-Start | 2µA current source enables capacitor-based soft-start ramp; also supports output voltage tracking in multi-rail systems. |
| FB | Feedback Input | Regulated to 0.778V; connects to resistor divider for adjustable outputs; internal 6.6MΩ divider for LT8607-5 fixed 5V variant. |
| PG | Power Good Open-Drain | Pulled low when FB is within ±8.5% of target and no fault; requires external pull-up for MCU reset or sequencing. |
| GND | Ground / Exposed Pad | Pin 11 is exposed thermal pad; must be soldered to large PCB ground plane for thermal management and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 2.5µA in Burst Mode enables >10-year battery life in always-on automotive and industrial sensors. |
| Spread-Spectrum EMI Reduction | Modulates switching frequency up to ±6kHz when SYNC is high, lowering peak radiated emissions per CISPR 25 Class 5. |
| Fast Transient Response | Peak current mode + internal compensation achieves <10µs recovery from 50% load step with minimal output deviation. |
| AEC-Q100 Qualified | Rated for –40°C to 125°C junction temperature (Grade E), supporting under-hood and ADAS power supply requirements. |
| Robust Protection Suite | Includes overtemperature shutdown, internal current limiting (1.2–2.0A), and PG fault detection with hysteresis. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering CAN transceivers, LIN interfaces, and door-lock actuators from 12V battery with cold-crank survival. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering stable rail during 3.0V–42V input transients. Use Value: 2.5µA quiescent current prevents battery drain during vehicle sleep mode; 35ns min-on-time ensures regulation at 42V→5V. | Use Scenario: Generating isolated 3.3V/5V rails for fieldbus communication modules in factory automation cabinets. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC converter replacing linear regulators to reduce heat and board area. Use Value: >93% efficiency at 500mA eliminates need for heatsinks; MSOP package fits dense I/O module layouts. |
| Telematics Control Unit (TCU) | Medical Portable Monitor |
Use Scenario: Supplying GPS, cellular modem, and microcontroller in always-connected fleet-tracking devices. IC Role / Device Role / Timing Role: Main system power regulator with programmable soft-start and Power Good signaling for safe boot sequencing. Use Value: TR/SS pin enables controlled voltage ramp to avoid inrush; PG output coordinates firmware initialization. | Use Scenario: Battery-powered patient monitor requiring long runtime and low EMI near sensitive analog front-ends. IC Role / Device Role / Timing Role: Low-noise, spread-spectrum buck converter for ADC reference and digital logic supplies. Use Value: Spread-spectrum mode reduces 2MHz switching harmonics below CISPR 25 limits; 10mVP-P ripple avoids signal corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8609EMSE#PBF | Higher 2A output current, identical 42V input and 2.5µA IQ, same MSOP-10 package and pinout. | Supports higher-power loads (e.g., multi-core MCUs) without layout change; shares same footprint and control interface. | Select when >750mA output current is required; retains all LT8607EMSE#PBF features and thermal performance. |
| TPS62840DRLR | 2.5V–6.5V input range, 750mA output, 300nA IQ; smaller 6-pin WSON package; no SYNC/TR/SS pins. | Limited to low-input applications (e.g., single-cell Li-ion); lacks spread-spectrum, tracking, and high-voltage capability. | Choose only for ultra-low-power, low-VIN designs where 42V rating and advanced features are unnecessary. |
Compared with LT8609EMSE#PBF, the LT8607EMSE#PBF offers optimal cost/performance for 750mA loads with full feature set; versus TPS62840DRLR, it provides critical 42V tolerance and automotive-grade robustness at higher IQ, making it irreplaceable in harsh-environment power systems.
Availability
LT8607EMSE#PBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLCs, telematics units, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8607EMSE#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 industrial, automotive, communications, and healthcare markets.
The LT8607 series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-efficiency, ultralow-IQ DC/DC conversion in space- and power-constrained automotive and industrial systems.
FAQ
What is the guaranteed operating junction temperature range for LT8607EMSE#PBF?
The LT8607EMSE#PBF is specified for –40°C to 125°C junction temperature. It is AEC-Q100 qualified (Grade E) and characterized across this full range, with performance assured by design, correlation, and statistical process controls-not just tested at 25°C.
Does LT8607EMSE#PBF support fixed 5V output without external resistors?
Yes, the LT8607EMSE#PBF is the adjustable version; however, the pin-compatible LT8607EMSE-5#PBF provides fixed 5V output using an internal 6.6MΩ feedback divider. The LT8607EMSE#PBF requires external R1/R2 to set VOUT, with recommended 1% tolerance for accuracy.
How does the SYNC pin function on LT8607EMSE#PBF, and what happens if left unconnected?
On LT8607EMSE#PBF (MSOP package), floating the SYNC pin enables pulse-skipping mode-continuous oscillator operation with skipped cycles at light load. Grounding SYNC selects low-ripple Burst Mode (1.7µA IQ). Leaving it unconnected defaults to pulse-skipping, increasing no-load current to several mA versus Burst Mode's 2.5µA.
Can LT8607EMSE#PBF be used in designs requiring spread-spectrum EMI reduction?
Yes, LT8607EMSE#PBF supports spread-spectrum frequency modulation when the SYNC pin is tied to INTVCC (3.2V–5.0V). This modulates the switching frequency ±6kHz around the RT-set value, significantly reducing peak radiated emissions-verified on DC2565A demo board per CISPR 25 Class 5.
What is the purpose of the TR/SS pin on LT8607EMSE#PBF, and how is it typically implemented?
The TR/SS pin on LT8607EMSE#PBF provides soft-start ramp control and output voltage tracking. An internal 2µA current source charges an external capacitor to program slew rate; for tracking, it forces the output to follow an external voltage scaled by 6.43×. It is pulled low during shutdown, so a series resistor is needed when driven by low-impedance sources.
LT8607EMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (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):
- 42V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- 12V
- Current - Output:
- 750mA
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT8607EMSE#PBF FAQ
1.How can I place an order for LT8607EMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607EMSE#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 LT8607EMSE#PBF reliable?
The price and inventory of LT8607EMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607EMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8607EMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607EMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607EMSE#PBF?
LT8607EMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607EMSE#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 LT8607EMSE#PBF?
For technical support, including LT8607EMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607EMSE#PBF requirements.
6.How does Aetrix verify that LT8607EMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8607EMSE#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 LT8607EMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8607EMSE#PBF?
All LT8607EMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607EMSE#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 LT8607EMSE#PBF part is unused and in its original packaging.
Return procedure for LT8607EMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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