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Analog Devices Inc. LT8607HDC#TRMPBF
- Part No.:
- LT8607HDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8607HDC#TRMPBF.pdf
- Description:
- IC REG BUCK ADJ 750MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:753
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Product details
Overview
LT8607HDC#TRMPBF from Analog Devices is a 42V, 750mA synchronous step-down regulator in an 8-lead 2mm × 2mm DFN package, featuring 2.5µA quiescent current in Burst Mode, 35ns minimum on-time, and AEC-Q100 qualification for automotive applications. It delivers regulated 3.3V/5V outputs with internal compensation and peak current mode control for fast transient response in battery-powered systems.
For engineers reviewing the LT8607HDC#TRMPBF datasheet, LT8607HDC#TRMPBF pinout, LT8607HDC#TRMPBF application, or LT8607HDC#TRMPBF equivalent, key selection criteria include ultralow IQ at light load, 42V input capability, thermal performance up to 150°C junction, and fixed vs adjustable output configuration compatibility.
Technical Context
The LT8607HDC#TRMPBF implements peak current mode control with internal compensation, enabling stable operation with small external inductors (e.g., 2.2µH) and fast load transient recovery. Its Burst Mode architecture reduces input supply current to 1.7µA during sleep cycles while maintaining <10mVP-P output ripple.
This DFN variant omits SYNC and TR/SS pins, fixing operation to Burst Mode only - unlike MSOP versions - and uses a 0.778V feedback reference with ±0.016V line regulation over 4.0–40V input. The 35ns minimum on-time supports high VIN/VOUT ratios (e.g., 42V→3.3V) at 2MHz switching.
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 transients. |
| Max Output Current | 750mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Quiescent Current | 2.5µA typical in Burst Mode - enables >10-year battery life in always-on IoT nodes with 100µA average load. |
| Switching Frequency | 200kHz to 2.2MHz programmable via RT resistor - allows optimization of size (high-freq) vs efficiency (low-freq). |
| Feedback Reference | 0.778V ±12mV over –40°C to 150°C - ensures accurate output regulation across full automotive temperature range. |
| Min On-Time | 35ns - enables high-step-down conversion (e.g., 42V→3.3V) at 2MHz without pulse-skipping instability. |
| Thermal Rating | Junction temperature range –40°C to 150°C - qualified per AEC-Q100 Grade H for under-hood automotive use. |
Pinout & Package
LT8607HDC#TRMPBF uses an 8-lead plastic (2mm × 2mm) DFN package with exposed pad (Pin 9) soldered to PCB ground for thermal management (θJA = 102°C/W). No SYNC or TR/SS pins - fixed Burst Mode operation only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; critical for top switch turn-on above VIN. |
| SW | Switch node connecting internal power FETs to inductor | High dv/dt node; must be minimized in layout to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic; powers internal logic and gate drivers - no external loading permitted. |
| RT | Resistor-based oscillator frequency programming | Connect to GND with resistor (e.g., 18.2kΩ for 2MHz); sets switching frequency and affects min-load threshold. |
| EN/UV | Enable and input undervoltage lockout input | 1.05V rising threshold; used to shut down regulator or program VIN UVLO with external divider. |
| VIN | Main input power supply connection | Must be locally bypassed with low-ESR capacitor placed adjacent to VIN and GND pins. |
| PG | Open-drain power-good indicator | Pulled low when FB is within ±8.5% of target; valid only when VIN > 3.2V and EN/UV high. |
| FB | Feedback input for adjustable output voltage | Regulated to 0.778V; connects to resistor divider - total resistance impacts light-load IQ. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA typical input current at no load enables multi-year battery operation in always-on systems. |
| High-VIN Capability | 42V absolute max rating supports 24V/36V industrial rails and 12V automotive systems with load dump tolerance. |
| AEC-Q100 Grade H | Qualified for –40°C to +150°C junction operation - suitable for engine control units and ADAS modules. |
| Fast Minimum On-Time | 35ns enables high-frequency, high-step-down conversion (e.g., 42V→3.3V @ 2MHz) without duty-cycle limitation. |
| Integrated Compensation | Eliminates external compensation components - reduces BOM count and design cycle time for robust loop stability. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
Use Scenario: Powering CAN transceiver, microcontroller, and analog front-end in door module with 12V battery input subject to cold-crank and load-dump events. IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator providing clean, efficient, and thermally robust power under wide input and temperature variation. Use Value: 2.5µA IQ extends backup battery life during vehicle sleep mode; 150°C rating ensures reliability near hot chassis locations. | Use Scenario: Battery-powered wireless vibration sensor operating in remote factory environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Main DC/DC converter delivering regulated 3.3V to MCU and RF transceiver from LiSOCl₂ primary cell (3.6V nominal, up to 3.9V). Use Value: 35ns min-on-time allows direct 3.9V→3.3V conversion at 2MHz, minimizing solution size while maintaining >90% efficiency at 100mA load. |
| Medical Portable Monitor | Avionics Data Logger |
Use Scenario: Powering display backlight driver, ADC, and ARM Cortex-M processor in handheld patient monitor using dual-cell Li-ion (8.4V max). IC Role / Device Role / Timing Role: High-efficiency, low-noise buck regulator supplying 5V rail with minimal EMI impact on sensitive analog signal paths. Use Value: Burst Mode operation keeps output ripple <10mVP-P and input current <3µA at standby - critical for FDA-compliant low-power design. | Use Scenario: Regulating 28V aircraft bus to 5V for flight data recorder FPGA and memory subsystem in extended temperature zones. IC Role / Device Role / Timing Role: Ruggedized step-down converter meeting DO-160 Section 22 radiated emissions with spread-spectrum-capable variants (not this DFN version). Use Value: AEC-Q100 Grade H qualification provides proven reliability baseline for avionics derating analysis; 42V rating covers 28V±10% bus transients. |
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 | Same DFN package and Burst Mode operation, but rated for –40°C to 125°C junction (Grade E vs H). | Not qualified for under-hood automotive use; limited to cabin or industrial ambient environments. | Select when 150°C operation is unnecessary and cost sensitivity favors commercial-grade variant. |
| LT8607BIDC#TRMPBF | DFN package with pulse-skipping mode instead of Burst Mode; higher light-load IQ (~500µA), no SYNC pin. | Higher EMI and lower light-load efficiency; preferred where deterministic switching timing matters more than IQ. | Choose when system-level EMI filters or clock synchronization requirements override ultralow-IQ needs. |
Compared with LT8607EDC#TRMPBF, LT8607HDC#TRMPBF adds 25°C higher junction rating for harsh environments; compared with LT8607BIDC#TRMPBF, it trades deterministic pulse timing for 200× lower no-load current - critical for battery longevity in infrequently active systems.
Availability
LT8607HDC#TRMPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical devices, and avionics data loggers requiring stable component supply with long-term lifecycle support.
Supply support for LT8607HDC#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 family is designed for high-efficiency, ultralow-quiescent-current DC/DC conversion in space- and power-constrained applications - especially where wide input range and automotive reliability are mandatory.
FAQ
What is the maximum junction temperature rating for LT8607HDC#TRMPBF?
The LT8607HDC#TRMPBF is rated for operation from –40°C to +150°C junction temperature and is AEC-Q100 qualified for Grade H automotive applications. This makes it suitable for under-hood environments where ambient temperatures exceed 105°C. Derating curves in the datasheet define safe operating area based on PCB copper area and airflow. The LT8607HDC#TRMPBF's thermal performance is validated with its exposed pad soldered to a minimum 100mm² thermal pad on the PCB.
Does LT8607HDC#TRMPBF support adjustable output voltage?
Yes, LT8607HDC#TRMPBF supports adjustable output voltage via the FB pin, which is regulated to 0.778V. An external resistor divider between VOUT and FB sets the output (e.g., 3.3V, 5V, or custom values). Unlike the LT8607-5 variant, LT8607HDC#TRMPBF does not have a fixed 5V output - it requires external resistors. The LT8607HDC#TRMPBF datasheet provides the exact formula and recommends 1% resistors for accuracy.
Can LT8607HDC#TRMPBF synchronize to an external clock?
No, LT8607HDC#TRMPBF cannot synchronize to an external clock. It is the DFN-package variant with no SYNC pin - the SYNC function is permanently tied to ground internally, fixing operation to Burst Mode only. For synchronization capability, the MSOP-package variants (e.g., LT8607HMSE#TRPBF) must be used. The LT8607HDC#TRMPBF's switching frequency is set solely by the RT resistor and cannot be externally modulated.
What is the typical quiescent current of LT8607HDC#TRMPBF at no load?
The typical quiescent current of LT8607HDC#TRMPBF at no load is 2.5µA in Burst Mode operation, measured with 12VIN → 3.3VOUT. This value includes all internal circuitry active during burst pulses and sleep cycles. At very light loads (<100µA), the LT8607HDC#TRMPBF enters deeper sleep states, achieving ~1.7µA average input current - critical for extending battery life in always-on applications like telematics or environmental sensors.
Is LT8607HDC#TRMPBF pin-compatible with other LT8607 variants?
No, LT8607HDC#TRMPBF is not pin-compatible with MSOP-package variants due to differing pin count (8-pin DFN vs 10-pin MSOP) and missing SYNC/TR/SS pins. However, it shares identical pin functions and placement for the common signals (VIN, GND, SW, BST, INTVCC, RT, EN/UV, PG, FB) within its 8-pin footprint. Layout redesign is required when migrating from MSOP to DFN, though schematic connectivity for core power functions remains consistent. The LT8607HDC#TRMPBF's exposed pad (Pin 9) must be soldered to PCB ground for thermal compliance.
LT8607HDC#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:
- 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 ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8607HDC#TRMPBF FAQ
1.How can I place an order for LT8607HDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607HDC#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 LT8607HDC#TRMPBF reliable?
The price and inventory of LT8607HDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607HDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8607HDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607HDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607HDC#TRMPBF?
LT8607HDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607HDC#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 LT8607HDC#TRMPBF?
For technical support, including LT8607HDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607HDC#TRMPBF requirements.
6.How does Aetrix verify that LT8607HDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8607HDC#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 LT8607HDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8607HDC#TRMPBF?
All LT8607HDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607HDC#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 LT8607HDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8607HDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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