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Analog Devices Inc. LT8607IDC#TRPBF
- Part No.:
- LT8607IDC#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8607IDC#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 750MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,428
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Product details
Overview
LT8607IDC#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 internal compensation for fast transient response. It delivers regulated output from 3.0V to 42V input in automotive and industrial power systems requiring ultra-low IQ and low EMI.
For engineers reviewing the LT8607IDC#TRPBF datasheet, LT8607IDC#TRPBF pinout, LT8607IDC#TRPBF application, or LT8607IDC#TRPBF equivalent, key selection criteria include its fixed Burst Mode operation (no SYNC pin), 0.778V feedback reference, AEC-Q100 qualification, and thermal performance in the thermally enhanced DFN package.
Technical Context
The LT8607IDC#TRPBF implements peak current mode control with internal compensation, enabling stable operation with small inductors and fast load-step response. Its 35ns minimum on-time supports high VIN/VOUT ratios (e.g., 42V→3.3V at 2MHz), while the fixed Burst Mode architecture-hardwired via internal SYNC grounding-ensures <10mVP-P ripple at light loads without external clocking.
It integrates top and bottom NMOS power switches (375mΩ/240mΩ typical RDS(on)), a 0.778V precision feedback reference, and EN/UV with 1.05V rising threshold and 50mV hysteresis. The DFN package omits TR/SS and SYNC pins, limiting functionality to programmable output via FB divider but guaranteeing ultralow IQ across –40°C to 125°C junction temperature.
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. |
| 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 and telematics applications. |
| Feedback Reference | 0.778V ±12mV - sets output accuracy and allows precise adjustable VOUT using standard 1% resistors. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - enables optimization of inductor size vs. efficiency; 2MHz operation allows 2.2µH inductors. |
| Min On-Time | 35ns - permits high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse-skipping instability. |
| Thermal Range | –40°C to 125°C operating junction - qualified per AEC-Q100 Grade I for under-hood automotive use. |
Pinout & Package
LT8607IDC#TRPBF 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 the exposed pad to PCB ground for thermal integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; no series resistor allowed - critical for reliable 42V operation. |
| SW | Switch node connecting internal power FETs to inductor | High dv/dt node; must be minimized on PCB to reduce EMI and switching losses. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic; not for external loading - powers internal logic and drivers. |
| RT | Resistor-based oscillator frequency programming | Connect to GND via resistor (e.g., 18.2kΩ for 2MHz); sets min/max fSW range and impacts light-load behavior. |
| 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 | Must be locally bypassed with low-ESR capacitor; connects to internal top switch and bias circuitry. |
| PG | Open-drain power-good indicator | Asserts low when VOUT is within ±8.5% of regulation - used for system sequencing and fault detection. |
| FB | Feedback input for adjustable output voltage | Regulated to 0.778V; determines VOUT via external resistor divider - defines output accuracy and load regulation. |
| GND | Power and signal ground (exposed pad) | Exposed pad (Pin 9) must be soldered to PCB ground plane - primary thermal path and noise reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA typical input current at no load - extends battery runtime in always-on automotive ECUs and sensor nodes. |
| Low-EMI Spread Spectrum | Not available - LT8607IDC#TRPBF lacks SYNC pin and operates exclusively in fixed Burst Mode, eliminating spread spectrum but ensuring lowest possible ripple and IQ. |
| Fast Minimum On-Time | 35ns enables 42V→3.3V conversion at 2MHz - avoids frequency foldback and maintains regulation during high-input transients. |
| AEC-Q100 Qualified | Grade I (–40°C to 125°C) - validated for automotive power rails including infotainment, ADAS cameras, and body control modules. |
| Internal Compensation | Eliminates external compensation network - reduces BOM count and layout sensitivity while maintaining stability with 2.2µH–4.7µH inductors. |
Applications
| Automotive Camera Power Supply | Industrial Sensor Node Regulator |
|---|---|
Use Scenario: Powers 3.3V image sensor and ISP in rear-view camera module with 12V battery input subject to cold-crank (4.5V) and load-dump (42V). IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering clean, low-noise 3.3V at up to 750mA with Burst Mode active during vehicle sleep. Use Value: 2.5µA IQ prevents battery drain over weeks of parking; 35ns on-time ensures regulation during 42V transients without dropout. | Use Scenario: Supplies 5V/3.3V to wireless sensor transceiver (e.g., LoRaWAN node) powered by LiSOCl₂ battery with 3.6V nominal and 20-year shelf life. IC Role / Device Role / Timing Role: Always-on step-down converter operating in Burst Mode to maintain VOUT during multi-year standby with µA-level leakage. Use Value: <10mVP-P ripple preserves ADC reference stability; AEC-Q100 qualification ensures reliability in harsh factory environments. |
| Telematics Control Unit (TCU) Core Rail | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Generates 1.2V/1.8V core supply for ARM Cortex-A MCU in cellular-connected TCU, accepting 9V–36V vehicle bus input. IC Role / Device Role / Timing Role: Secondary buck stage following front-end protection, providing tightly regulated low-voltage rail with fast transient response. Use Value: Peak current mode + internal compensation delivers <10µs recovery from 50% load steps - prevents MCU brownouts during LTE transmission bursts. | Use Scenario: Powers isolated RS-485 transceivers and analog input circuitry in DIN-rail mounted PLC I/O module with 24VDC field supply. IC Role / Device Role / Timing Role: Point-of-load regulator converting 24V to 3.3V/5V for communication and signal conditioning ASICs. Use Value: 42V absolute max rating withstands 36V surges per IEC 61000-4-5; DFN package enables compact, convection-cooled design without heatsinks. |
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 |
|---|---|---|---|
| LT8607EDC#TRPBF | Same DFN package and Burst Mode operation, but rated for –40°C to 125°C (E-grade) instead of I-grade; identical electrical specs. | Not AEC-Q100 qualified - suitable for commercial/industrial use only, not automotive. | Select LT8607EDC#TRPBF for cost-sensitive non-automotive designs where AEC-Q100 is unnecessary. |
| LT8607BIDC#TRPBF | Same DFN package but operates in pulse-skipping mode (no Burst Mode); higher light-load IQ (~500µA), no SYNC pin, fixed functional mode. | Higher EMI and ripple at light loads; better suited for applications needing deterministic timing over ultra-low IQ. | Choose LT8607BIDC#TRPBF when system timing alignment or reduced burst-frequency interference is prioritized over battery life. |
Compared with LT8607EDC#TRPBF, the LT8607IDC#TRPBF adds AEC-Q100 qualification for automotive use; compared with LT8607BIDC#TRPBF, it delivers 200× lower quiescent current in standby but sacrifices pulse-skipping determinism - making it optimal for battery-critical, EMI-sensitive automotive sensing.
Availability
LT8607IDC#TRPBF is available at Aetrix Electronics and suitable for automotive camera modules, industrial sensor nodes, telematics control units, and programmable logic controller I/O modules requiring stable component supply with AEC-Q100 compliance and ultralow quiescent current.
Supply support for LT8607IDC#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 industrial, automotive, communications, and healthcare markets.
The LT8607/LT8607B product line was designed for high-efficiency, ultralow-IQ DC/DC conversion in space- and power-constrained applications - especially automotive subsystems requiring AEC-Q100 reliability and extended battery life.
FAQ
What is the function of the FB pin on the LT8607IDC#TRPBF?
The FB (Feedback) pin on the LT8607IDC#TRPBF is the input to the internal error amplifier and is regulated to a precise 0.778V reference. An external resistor divider from VOUT to GND connects to this pin to set the output voltage according to VOUT = 0.778V × (1 + R1/R2). This configuration enables accurate, adjustable output regulation while minimizing divider current to preserve ultralow quiescent current in the LT8607IDC#TRPBF.
Does the LT8607IDC#TRPBF support external synchronization?
No, the LT8607IDC#TRPBF does not support external synchronization. As a DFN-package variant, it lacks the SYNC pin entirely - the internal SYNC node is hardwired to ground, fixing the device to operate exclusively in Burst Mode. Unlike MSOP versions, it cannot be synchronized to an external clock, nor can it enter pulse-skipping or spread spectrum modes. This design choice optimizes the LT8607IDC#TRPBF for lowest possible IQ and EMI in battery-powered automotive applications.
What is the maximum continuous output current of the LT8607IDC#TRPBF?
The LT8607IDC#TRPBF delivers 750mA of continuous output current under thermal limits defined by its 2mm × 2mm DFN package and PCB layout. This rating assumes proper thermal design - including full soldering of the exposed GND pad to a copper plane - and operation within the –40°C to 125°C junction temperature range. Derating applies at elevated ambient temperatures or with insufficient copper area; the device includes thermal shutdown to protect against sustained overload.
How does the EN/UV pin function on the LT8607IDC#TRPBF?
The EN/UV (Enable/Undervoltage) pin on the LT8607IDC#TRPBF provides dual functionality: it enables the regulator when pulled above 1.05V (with 50mV hysteresis) and disables it below 1.00V, reducing input current to 1µA. It also supports programmable input undervoltage lockout via an external resistor divider from VIN - allowing system designers to set custom turn-on thresholds (e.g., 6V for 12V battery systems) while maintaining precise control over the LT8607IDC#TRPBF's activation behavior.
Is the LT8607IDC#TRPBF AEC-Q100 qualified?
Yes, the LT8607IDC#TRPBF is AEC-Q100 qualified per Grade I (–40°C to 125°C operating junction temperature), making it suitable for automotive applications including camera modules, telematics units, and body electronics. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - confirming reliability in demanding automotive environments. The "I" suffix in the part number explicitly denotes this automotive-grade qualification for the LT8607IDC#TRPBF.
LT8607IDC#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 ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8607IDC#TRPBF FAQ
1.How can I place an order for LT8607IDC#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607IDC#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 LT8607IDC#TRPBF reliable?
The price and inventory of LT8607IDC#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607IDC#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8607IDC#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607IDC#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607IDC#TRPBF?
LT8607IDC#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607IDC#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 LT8607IDC#TRPBF?
For technical support, including LT8607IDC#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607IDC#TRPBF requirements.
6.How does Aetrix verify that LT8607IDC#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8607IDC#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 LT8607IDC#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8607IDC#TRPBF?
All LT8607IDC#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607IDC#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 LT8607IDC#TRPBF part is unused and in its original packaging.
Return procedure for LT8607IDC#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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