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Analog Devices Inc. LT8607BIDC#TRMPBF
- Part No.:
- LT8607BIDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8607BIDC#TRMPBF.pdf
- Description:
- IC REG BUCK PROG 750MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LT8607BIDC#TRMPBF from Analog Devices is a 42V, 750mA synchronous step-down regulator in an 8-lead 2mm × 2mm DFN package, featuring pulse-skipping mode operation, 2.5µA quiescent current in regulation, 35ns minimum on-time, and internal compensation for fast transient response. It delivers stable 3.3V or adjustable output in automotive and industrial power supplies where low EMI and ultralow IQ are critical.
For engineers reviewing the LT8607BIDC#TRMPBF datasheet, LT8607BIDC#TRMPBF pinout, LT8607BIDC#TRMPBF application, or LT8607BIDC#TRMPBF equivalent, key selection factors include its fixed pulse-skipping mode (no SYNC pin), 0.778V feedback reference, AEC-Q100 qualification, thermal performance in DFN-8, and compatibility with 2.2µH–4.7µH inductors for 2MHz operation.
Technical Context
The LT8607BIDC#TRMPBF implements peak current mode control with internal compensation, enabling stable operation with small external components and fast load-step response. Its pulse-skipping mode-hardwired in the DFN variant-maintains continuous oscillator operation and clock-aligned switching, differing fundamentally from Burst Mode used in LT8607 DFN variants.
It features a 0.778V precision feedback reference, 1V EN/UV threshold with 50mV hysteresis, and integrated top/bottom NMOS switches (375mΩ/240mΩ typical RDS(on)). The device supports input voltages from 3.0V to 42V and regulates down to 3.3V or any higher voltage via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range 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 at no load (12VIN→3.3VOUT) - enables >10-year battery life in always-on IoT and telematics applications. |
| Switching Frequency | Adjustable 200kHz–2.2MHz via RT resistor - allows optimization of inductor size vs. efficiency; 2MHz enables use of 2.2µH inductors. |
| Feedback Reference | 0.778V ±12mV (–40°C to 125°C) - high-accuracy reference enables ±1% output regulation with 1% FB resistors. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) at 2MHz without pulse skipping or instability. |
| Thermal Rating | –40°C to 125°C junction - qualified per AEC-Q100 Grade I, suitable for under-hood and industrial control environments. |
Pinout & Package
LT8607BIDC#TRMPBF uses an 8-lead, 2mm × 2mm plastic DFN package with exposed thermal pad (Pin 9 = GND). The package has θJA = 102°C/W and requires soldering of the exposed pad to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; enables efficient 42V operation with integrated high-side switch. |
| SW | Switch node connecting internal FETs and external inductor | High dv/dt node; must be minimized on PCB layout to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF ceramic capacitor; powers internal logic and gate drivers; not for external loading. |
| RT | Resistor-based oscillator frequency programming | Connect to GND via resistor (e.g., 18.2kΩ for 2MHz); sets switching frequency independently of load or input. |
| EN/UV | Enable and input undervoltage lockout input | 1.05V rising threshold with 50mV hysteresis; enables programmable VIN cutoff or remote shutdown. |
| VIN | Main input power supply | Supplies internal circuitry and high-side switch; requires local 4.7µF–10µF low-ESR ceramic bypass. |
| PG | Power good open-drain output | Asserts low when FB is within ±8.5% of regulation; requires external pull-up for system sequencing or fault indication. |
| FB | Feedback input for adjustable output regulation | Regulated to 0.778V; connects to resistor divider tap; determines output voltage as VOUT = 0.778V × (1 + R1/R2). |
| GND | Power and signal ground (exposed pad) | Exposed pad (Pin 9) must be soldered to large PCB ground plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode (fixed in DFN) | Guarantees continuous oscillator operation and clock-aligned switching-enabling predictable EMI spectrum and deterministic light-load behavior without Burst Mode frequency foldback. |
| Ultralow 2.5µA quiescent current | Enables >10-year runtime on coin-cell batteries in always-on monitoring nodes, meeting stringent energy budget requirements for automotive and industrial IoT. |
| 35ns minimum on-time | Supports direct 42V-to-3.3V conversion at 2MHz without requiring intermediate stages, reducing BOM count and board area. |
| AEC-Q100 Grade I qualification | Validated for automotive applications including body electronics, ADAS sensors, and infotainment power rails operating from –40°C to +125°C. |
| Integrated 375mΩ/240mΩ NMOS switches | Eliminates need for external MOSFETs and drivers; simplifies design while maintaining >93% efficiency at 500mA (12V→5V). |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powering CAN transceiver, LIN interface, and microcontroller in door module with 12V battery input subject to cold-crank (4.5V) and load-dump (42V) events. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering regulated supply with pulse-skipping stability and low EMI during CAN bus activity. Use Value: Maintains clean 3.3V rail across full automotive voltage range while consuming only 2.5µA in sleep mode-extending battery reserve time during vehicle off-state. | Use Scenario: Providing 3.3V supply to wireless sensor (BLE/Zigbee) and analog front-end in factory-floor vibration monitor powered by 24V DC bus. IC Role / Device Role / Timing Role: High-efficiency, low-noise step-down converter enabling long-life operation from 24V industrial supply with minimal heat rise in sealed enclosure. Use Value: Delivers 750mA with <10mVP-P ripple at 2MHz, allowing compact 2.2µH inductor and reducing conducted EMI without external filters. |
| Telematics Control Unit (TCU) | Rail Splitter for Precision ADC |
Use Scenario: Generating isolated 3.3V domain for GPS/GNSS receiver and cellular modem in automotive TCU with strict RF noise limits. IC Role / Device Role / Timing Role: Low-EMI buck regulator operating in pulse-skipping mode to avoid interference with sensitive RF receivers. Use Value: Spread-spectrum capability (via external sync) not available-but fixed pulse-skipping provides repeatable, filterable noise profile compatible with CISPR 25 Class 5 radiated emission limits. | Use Scenario: Creating clean, low-noise 2.5V reference rail for 16-bit SAR ADC in portable test equipment powered from single 5V USB source. IC Role / Device Role / Timing Role: Precision-adjustable buck regulator supplying ADC analog core with ultra-stable voltage and minimal PSRR-induced error. Use Value: 0.778V reference tolerance (±12mV over temp) and internal compensation ensure <0.1% line/load regulation-critical for sub-LSB measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8607EDC#TRMPBF | Burst Mode operation (SYNC internally grounded), 1.7µA IQ, same DFN-8 package and pinout | Better suited for ultra-low-power always-on applications where lowest possible IQ dominates over EMI predictability | Select LT8607EDC#TRMPBF if minimizing no-load current is primary; select LT8607BIDC#TRMPBF if deterministic pulse-skipping timing and EMI control are required. |
| LT8609SIDD#TRMPBF | Higher 2A output, 3.5µA IQ, same pulse-skipping mode, 12-lead 3mm × 3mm DFN | Supports higher current loads (e.g., multi-rail PMIC subsystems) but requires larger board area and higher cost | Choose LT8609SIDD#TRMPBF when >750mA output or dual-output coordination is needed; LT8607BIDC#TRMPBF remains optimal for space- and cost-sensitive 750mA designs. |
Compared with LT8607EDC#TRMPBF, LT8607BIDC#TRMPBF trades 0.8µA higher no-load IQ for deterministic pulse alignment and reduced EMI variability; versus LT8609SIDD#TRMPBF, it offers identical functionality in half the footprint and at lower unit cost for ≤750mA applications.
Availability
LT8607BIDC#TRMPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, telematics units, and precision analog power rails requiring stable component supply, AEC-Q100 compliance, and long-term manufacturability.
Supply support for LT8607BIDC#TRMPBF 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/LT8607B product line delivers ultralow-IQ synchronous buck regulators optimized for automotive and industrial applications demanding high efficiency across wide input ranges, robust thermal performance, and AEC-Q100 qualification.
FAQ
What distinguishes LT8607BIDC#TRMPBF from LT8607EDC#TRMPBF?
The LT8607BIDC#TRMPBF operates exclusively in pulse-skipping mode (SYNC internally floated), offering deterministic switching alignment and higher light-load quiescent current (~2.5µA). In contrast, LT8607EDC#TRMPBF uses Burst Mode (SYNC internally grounded), achieving lower IQ (~1.7µA) but with variable burst frequency and higher output ripple. Both share identical DFN-8 packaging, pinout, and temperature rating (–40°C to 125°C).
Does LT8607BIDC#TRMPBF support external synchronization?
No. The LT8607BIDC#TRMPBF is a DFN-package variant with no SYNC pin; its pulse-skipping mode is hardwired and cannot be synchronized to an external clock. For sync capability, consider MSOP-packaged LT8607 variants (e.g., LT8607MSE#TRPBF), which include a dedicated SYNC pin supporting external clock alignment, spread-spectrum modulation, or mode selection.
What is the recommended inductor value for LT8607BIDC#TRMPBF at 2MHz operation?
For 2MHz operation, Analog Devices recommends a 2.2µH or 4.7µH shielded power inductor (e.g., Coilcraft XFL4020-222ME or XFL4020-472ME). At 2MHz, 2.2µH yields smaller size and lower DC resistance, while 4.7µH provides lower peak inductor current and slightly improved light-load efficiency. Both values maintain stable operation with the LT8607BIDC#TRMPBF's 35ns minimum on-time.
Can LT8607BIDC#TRMPBF regulate to 5V output?
Yes. The LT8607BIDC#TRMPBF is an adjustable-output variant and can regulate to 5V using an external resistor divider on the FB pin. With a 0.778V reference, a standard solution uses R1 = 54.9kΩ and R2 = 10kΩ (1% tolerance), yielding VOUT = 0.778V × (1 + 54.9k/10k) ≈ 5.00V. The fixed 5V version is the LT8607-5 family (e.g., LT8607-5MSE#TRPBF), not the B-suffix DFN variants.
Is LT8607BIDC#TRMPBF suitable for AEC-Q100 automotive applications?
Yes. The "I" grade in LT8607BIDC#TRMPBF denotes operation from –40°C to +125°C junction temperature and full AEC-Q100 Grade I qualification. It is specifically designed for automotive body electronics, infotainment, and ADAS subsystems where reliability under extended temperature and voltage stress (e.g., 42V load dump) is mandatory.
LT8607BIDC#TRMPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.778V
- Voltage - Output (Max):
- 42V
- 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:
- 8-DFN (2x2)
LT8607BIDC#TRMPBF FAQ
1.How can I place an order for LT8607BIDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607BIDC#TRMPBF 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 LT8607BIDC#TRMPBF reliable?
The price and inventory of LT8607BIDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607BIDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8607BIDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607BIDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607BIDC#TRMPBF?
LT8607BIDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607BIDC#TRMPBF 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 LT8607BIDC#TRMPBF?
For technical support, including LT8607BIDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607BIDC#TRMPBF requirements.
6.How does Aetrix verify that LT8607BIDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8607BIDC#TRMPBF 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 LT8607BIDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8607BIDC#TRMPBF?
All LT8607BIDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607BIDC#TRMPBF, 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 LT8607BIDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8607BIDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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