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Analog Devices Inc. LT8607HDC#TRPBF
- Part No.:
- LT8607HDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8607HDC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 750MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,262
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Product details
Overview
LT8607HDC#TRPBF 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 or adjustable output with internal compensation and peak current mode control.
For engineers reviewing the LT8607HDC#TRPBF datasheet, LT8607HDC#TRPBF pinout, LT8607HDC#TRPBF application, or LT8607HDC#TRPBF equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, automotive-grade thermal performance (–40°C to 150°C), and confirmed alternative options for low-IQ DC/DC conversion in space-constrained systems.
Technical Context
The LT8607HDC#TRPBF implements peak current mode control with internal compensation, enabling fast transient response and stable loop behavior using small external inductors. Its Burst Mode operation reduces input supply current to 2.5µA while maintaining <10mVP-P output ripple at light loads.
This DFN variant omits SYNC and TR/SS pins-internally tying SYNC to ground-locking it into fixed Burst Mode operation without spread spectrum or external synchronization capability. It features a 0.778V feedback reference, 1V EN/UV threshold with 50mV hysteresis, and integrated top/bottom NMOS switches with 375mΩ/240mΩ on-resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients including cold-crank (4.5V) and load-dump (40V+). |
| Output Current | 750mA continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in automotive ECUs. |
| Quiescent Current | 2.5µA in Burst Mode - enables >10-year battery life in always-on vehicle modules like telematics or door controllers. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization between EMI compliance and component size (e.g., 2.2MHz enables ≤2.2µH inductors). |
| Feedback Reference | 0.778V ±12mV - enables precise output regulation; used with external resistor divider for adjustable outputs or internal 5V fixed option. |
| Min On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 24V→3.3V) at 2MHz without pulse-skipping instability. |
| Thermal Rating | –40°C to 150°C junction - qualified per AEC-Q100 Grade H for under-hood automotive use. |
Pinout & Package
Package: 8-lead plastic DFN (2mm × 2mm), exposed pad (Pin 9) connected to GND for thermal and electrical integrity. θJA = 102°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap Supply | Drives top NMOS gate above VIN; requires 0.1µF ceramic capacitor placed adjacent to IC for reliable high-side switching. |
| SW | Power Switch Node | Connects to inductor and BST capacitor; must be minimized in PCB area to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V Regulator Bypass | Supplies internal logic/drivers; requires ≥1µF low-ESR ceramic capacitor to GND; no external loading permitted. |
| RT | Frequency Programming | Resistor to GND sets switching frequency (200kHz–2.2MHz); determines inductor/capacitor sizing and EMI profile. |
| EN/UV | Enable / Input UVLO Control | 1.05V rising threshold with 50mV hysteresis; enables VIN undervoltage lockout or shutdown with <1µA standby current. |
| VIN | Main Power Input | Supplies internal circuitry and top switch; requires local high-frequency input capacitor (e.g., 4.7µF X7R) with short GND path. |
| PG | Power Good Output | Open-drain signal asserting when FB is within ±8.5% of regulation; valid only when VIN >3.2V and EN/UV high. |
| FB | Feedback Input | Regulated to 0.778V; connects to resistor divider tap for adjustable output; 1% resistors recommended for accuracy. |
| GND | Ground / Exposed Pad | Primary thermal and electrical return; exposed pad (Pin 9) must be soldered to large PCB copper area for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow Quiescent Current | 2.5µA in Burst Mode enables multi-year operation from coin cells or automotive standby batteries. |
| AEC-Q100 Qualified | Grade H (–40°C to +150°C) ensures reliability in engine control units, ADAS cameras, and body electronics. |
| Low EMI Operation | Burst Mode + fast 35ns min on-time minimizes switching noise; compatible with CISPR 25 Class 5 radiated emission limits. |
| Internal Compensation | Eliminates external compensation network, reducing BOM count and layout sensitivity for robust production designs. |
| Synchronous Rectification | Integrated bottom NMOS (240mΩ) replaces external diode, improving efficiency by ~5–10% over asynchronous designs at medium loads. |
Applications
| Automotive Body Control Module | Industrial Sensor Node |
|---|---|
Use Scenario: Powering LIN transceivers, door lock actuators, and ambient light sensors in vehicle door modules with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V/5V step-down regulator delivering 750mA with ultralow IQ to meet ISO 16750-2 sleep current requirements. Use Value: 2.5µA quiescent current prevents battery drain during weeks-long vehicle storage; AEC-Q100 H-grade ensures operation at 150°C near power electronics. | Use Scenario: Supplying wireless sensor nodes in factory automation systems powered by 24V industrial rails. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC converter generating stable 3.3V for ultra-low-power MCUs and BLE radios. Use Value: 2.2MHz programmable switching enables use of 2.2µH inductors, reducing solution footprint by >40% vs. 500kHz alternatives. |
| ADAS Camera Power Supply | Telematics Control Unit (TCU) |
Use Scenario: Providing clean, low-noise 1.8V/3.3V rails for image sensors and ISP processors in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High PSRR, low-ripple regulator operating in Burst Mode to avoid interference with analog video signals. Use Value: <10mVP-P output ripple at 100µA load ensures minimal clock jitter in image sensor timing; 35ns min on-time supports 12V→1.8V conversion at 2MHz. | Use Scenario: Powering cellular modems, GNSS receivers, and secure elements in vehicle connectivity gateways. IC Role / Device Role / Timing Role: Primary buck regulator handling wide-input (9–36V) automotive supply with high efficiency across load range. Use Value: >93% efficiency at 500mA (12V→5V) reduces thermal stress in sealed enclosures; 42V abs max rating withstands load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT8609SIDD#TRPBF | Same DFN-8 package, 2A output, 2.5µA IQ, but includes SYNC/TR/SS pins and spread spectrum support. | Supports external synchronization and soft-start tracking-required for multi-rail coordinated power-up in complex ECUs. | Select when higher current (2A) or system-level timing control (SYNC/TR/SS) is needed; not pin-compatible due to added functionality. |
| TPS62840DRVR | 2.5V–6.5V input, 750mA, 150nA IQ, WSON-12 package; lacks 42V rating and AEC-Q100 qualification. | Optimized for low-voltage battery-powered IoT devices-not suitable for automotive 12V/24V systems or high-temp environments. | Consider only for non-automotive, low-input-voltage applications where nanoscale IQ outweighs voltage/temperature requirements. |
Compared with LT8607HDC#TRPBF, LT8609SIDD#TRPBF offers higher current and advanced control features but requires PCB redesign; TPS62840DRVR achieves lower IQ yet fails to meet automotive voltage, temperature, or qualification requirements-making LT8607HDC#TRPBF the only validated choice for AEC-Q100-compliant 42V, 750mA, ultralow-IQ buck conversion.
Availability
LT8607HDC#TRPBF is available at Aetrix Electronics and suitable for automotive body control modules, ADAS camera power supplies, and telematics control units requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.
Supply support for LT8607HDC#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 LT8607 product line delivers ultralow-quiescent-current synchronous buck regulators optimized for automotive and industrial applications demanding high efficiency across wide input ranges and extreme temperature operation.
FAQ
What is the maximum junction temperature rating for LT8607HDC#TRPBF?
The LT8607HDC#TRPBF is rated for operation from –40°C to +150°C junction temperature and is qualified per AEC-Q100 Grade H. This specification is validated across process corners and lifetime reliability testing, making it suitable for under-hood automotive applications where ambient temperatures exceed 125°C.
Does LT8607HDC#TRPBF support adjustable output voltage?
Yes, LT8607HDC#TRPBF 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; for example, R1 = 187kΩ and R2 = 100kΩ yields 3.3V. The LT8607-5 variant provides fixed 5V output instead.
Can LT8607HDC#TRPBF synchronize to an external clock?
No, LT8607HDC#TRPBF does not support external clock synchronization. As a DFN-package variant, it has no SYNC pin-internally tied to ground-locking it into Burst Mode operation only. For SYNC capability, consider the MSOP-packaged LT8607HMSE#TRPBF.
What is the typical efficiency of LT8607HDC#TRPBF at 500mA load?
At 500mA output current, 12V input to 5V output, and 2MHz switching frequency, LT8607HDC#TRPBF achieves >93% efficiency. This value is measured with standard 4.7µH inductor and 22µF output capacitance, as documented in Figure 1 of the official datasheet (Rev. D).
Is LT8607HDC#TRPBF pin-compatible with LT8607B variants?
No, LT8607HDC#TRPBF is not pin-compatible with LT8607B variants. While both use the same DFN-8 package, LT8607B operates in pulse-skipping mode (no Burst Mode), whereas LT8607HDC#TRPBF is hardwired for Burst Mode. Their internal SYNC node configuration differs, affecting functional behavior despite identical pinout.
LT8607HDC#TRPBF 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#TRPBF FAQ
1.How can I place an order for LT8607HDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607HDC#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 LT8607HDC#TRPBF reliable?
The price and inventory of LT8607HDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607HDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8607HDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607HDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607HDC#TRPBF?
LT8607HDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607HDC#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 LT8607HDC#TRPBF?
For technical support, including LT8607HDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607HDC#TRPBF requirements.
6.How does Aetrix verify that LT8607HDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8607HDC#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 LT8607HDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8607HDC#TRPBF?
All LT8607HDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607HDC#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 LT8607HDC#TRPBF part is unused and in its original packaging.
Return procedure for LT8607HDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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