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Analog Devices Inc. LT8607BEDC#TRMPBF
- Part No.:
- LT8607BEDC#TRMPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT8607BEDC#TRMPBF.pdf
- Description:
- IC REG BUCK PROG 750MA 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:500
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Product details
Overview
LT8607BEDC#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 fixed-frequency pulse-skipping operation. It delivers regulated 3.3V or adjustable output in automotive and industrial power systems with wide input range (3.0V–42V) and low EMI.
For engineers reviewing the LT8607BEDC#TRMPBF datasheet, LT8607BEDC#TRMPBF pinout, LT8607BEDC#TRMPBF application, or LT8607BEDC#TRMPBF equivalent, key selection criteria include ultralow IQ at light load, pulse-skipping vs. Burst Mode behavior, thermal performance in DFN, EN/UV threshold accuracy, and compatibility with 2.2µH–4.7µH inductors for 2MHz operation.
Technical Context
The LT8607BEDC#TRMPBF implements peak current mode control with internal compensation, enabling fast transient response and stable loop behavior using small external components. Its pulse-skipping mode-hardwired in the B-variant DFN package-maintains continuous oscillator operation and clock-aligned switching, differing fundamentally from the Burst Mode of standard LT8607 DFN parts.
It integrates a 0.778V feedback reference, 1V EN/UV threshold with 50mV hysteresis, and a dedicated PG open-drain output with ±8.5% regulation window. The device lacks SYNC and TR/SS pins, confirming its fixed-function DFN configuration optimized for simplicity and EMI-sensitive applications requiring deterministic switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports 12V/24V/36V automotive and industrial rails without pre-regulation. |
| Output Current | 750mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact systems. |
| Quiescent Current | 2.5µA in pulse-skipping mode - enables always-on functionality in battery-backed or energy-harvesting applications. |
| Switching Frequency | Programmable 200kHz–2.2MHz via RT resistor - allows trade-off between inductor size (e.g., 2.2µH at 2MHz) and efficiency. |
| Min On-Time | 35ns - enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse skipping or instability. |
| Feedback Reference | 0.778V ±12mV - sets output accuracy; used with external resistor divider for adjustable VOUT or internal 5V/3.3V variants. |
| Thermal Resistance | θJA = 102°C/W - requires exposed pad soldering to PCB ground plane for reliable 125°C junction operation. |
Pinout & Package
LT8607BEDC#TRMPBF uses an 8-lead plastic (2mm × 2mm) DFN package with exposed thermal pad (Pin 9 = GND). The package omits SYNC and TR/SS pins, confirming its fixed pulse-skipping functionality and simplified layout requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply | Drives top MOSFET gate above VIN; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| 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 output | Bypassed with ≥1µF low-ESR ceramic; powers internal logic and drivers; not for external loading. |
| RT | Frequency programming | Resistor to GND sets switching frequency (e.g., 18.2kΩ → 2MHz); no external clock support. |
| EN/UV | Enable / input UVLO input | 1.05V rising threshold; hysteresis enables clean startup/shutdown; resistor divider sets custom VIN cutoff. |
| VIN | Main power input | Supplies internal circuitry and top switch; requires local high-frequency ceramic bypass (e.g., 4.7µF X7R). |
| PG | Power good indicator | Open-drain output active low when FB is within ±8.5% of target; 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; no internal divider (unlike LT8607-5). |
| GND | Ground / thermal pad | Exposed pad (Pin 9) must be soldered to PCB ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Pulse-skipping mode (B-variant) | Guaranteed continuous oscillator operation with clock-aligned switching-no burst discontinuities-enabling predictable EMI and timing-critical loads. |
| Ultralow 2.5µA quiescent current | Extends battery life in always-on systems (e.g., telematics, CAN nodes) without sacrificing regulation stability at microamp loads. |
| 35ns minimum on-time | Supports direct 42V-to-3.3V conversion at 2MHz without duty-cycle limitation or external FETs. |
| Integrated 0.778V reference & compensation | Eliminates need for external compensation network; reduces BOM count and design iteration time for 2-layer PCBs. |
| AEC-Q100 qualified (Grade E) | Rated for −40°C to +125°C junction temperature-validated for under-hood automotive power rail applications. |
Applications
| Automotive Body Control Module (BCM) | Industrial IoT Sensor Node |
|---|---|
Use Scenario: Powering CAN transceivers, LIN controllers, and door-lock actuators from 12V battery with cold-crank tolerance down to 3V. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator delivering stable, low-noise supply during engine start-stop cycles. Use Value: 2.5µA IQ ensures BCM retains memory and real-time clock during extended vehicle sleep; 42V rating withstands load-dump transients. | Use Scenario: Battery-powered wireless vibration sensor operating in remote factory environments with 10-year lifetime requirement. IC Role / Device Role / Timing Role: Main system regulator supplying MCU, RF SoC, and analog front-end from LiSOCl₂ cell or energy harvester. Use Value: Pulse-skipping mode provides deterministic switching for synchronized sampling; 35ns on-time enables single-stage 3.6V→1.8V conversion. |
| Railway Signaling Interface | Medical Portable Diagnostic Device |
Use Scenario: Converting 72V nominal railway supply (range 40–121V) to isolated 5V for optocoupler-driven I/O modules. IC Role / Device Role / Timing Role: Pre-regulator stage feeding downstream isolated DC/DC converters; handles wide VIN with minimal external components. Use Value: 42V absolute max rating with robust 3.0V–42V operational range simplifies front-end design; AEC-Q100 qualification supports EN 5012x compliance paths. | Use Scenario: Powering FPGA-based image processing core and analog acquisition chain in handheld ultrasound probe. IC Role / Device Role / Timing Role: High-efficiency intermediate rail generator (e.g., 12V→3.3V) with low ripple for noise-sensitive ADC references. Use Value: <10mVP-P output ripple in pulse-skipping mode avoids post-regulation LDOs; 2mm × 2mm DFN saves space in ultra-thin form factor. |
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 but operates in Burst Mode (not pulse-skipping); 1.7µA IQ vs. 2.5µA; lower light-load ripple but discontinuous switching. | Suitable where lowest possible IQ dominates over EMI predictability or timing-critical loads. | Select LT8607EDC#TRMPBF only if Burst Mode's variable frequency is acceptable and sub-2µA IQ is mandatory. |
| LT8640SDE#TRPBF | 42V, 5A, 2.5µA IQ, 2MHz sync-capable buck; larger 16-lead 3mm × 4mm DFN; includes spread spectrum and SYNC pin. | Required for higher current (>750mA) or when external clock synchronization or EMI reduction via spread spectrum is needed. | Choose LT8640SDE#TRPBF when scaling power delivery or adding system-level timing coordination beyond LT8607BEDC#TRMPBF capability. |
Compared with LT8607EDC#TRMPBF, the LT8607BEDC#TRMPBF trades slightly higher IQ for deterministic pulse-skipping timing and reduced EMI spectral peaks; versus LT8640SDE#TRPBF, it offers smaller footprint and lower cost at the expense of current rating and feature set.
Availability
LT8607BEDC#TRMPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, railway signaling interfaces, and portable medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8607BEDC#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 precision instrumentation, industrial automation, communications, and automotive markets.
The LT8607/LT8607B product line delivers ultralow-IQ synchronous buck regulators for always-on systems demanding wide VIN range, high efficiency at light loads, and robust operation in harsh environments.
FAQ
What is the key functional difference between LT8607BEDC#TRMPBF and LT8607EDC#TRMPBF?
The LT8607BEDC#TRMPBF is factory-configured for pulse-skipping mode, ensuring continuous oscillator operation and clock-aligned switching for predictable EMI and timing-critical loads. In contrast, LT8607EDC#TRMPBF operates in Burst Mode, delivering intermittent pulses with deep sleep periods to achieve lower 1.7µA IQ but introducing variable frequency and higher low-frequency ripple. Both share identical DFN packaging and pinout.
Does LT8607BEDC#TRMPBF support adjustable output voltage?
Yes, LT8607BEDC#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., R1 = 187kΩ, R2 = 100kΩ yields ~3.3V). Unlike the LT8607-5 variant, it has no internal 5V divider; all output programming is external and fully configurable.
What is the maximum recommended switching frequency for LT8607BEDC#TRMPBF at 42V input to 3.3V output?
Using the min on-time constraint (35ns), the theoretical maximum switching frequency for LT8607BEDC#TRMPBF at 42V→3.3V is ~1.1MHz. At 2MHz operation, duty cycle drops to ~8%, still within stable operation per datasheet validation. For reliability, Analog Devices recommends ≤2MHz with proper layout and 2.2µH–4.7µH inductors; 18.2kΩ RT resistor configures exactly 2MHz.
Is LT8607BEDC#TRMPBF pin-compatible with other LT8607 DFN variants?
Yes, LT8607BEDC#TRMPBF shares identical 8-lead 2mm × 2mm DFN pinout and footprint with LT8607EDC#TRMPBF, LT8607IDC#TRMPBF, and LT8607HDC#TRMPBF. All use the LGXM or LGXK marking and require exposed pad soldering. Functional differences (Burst vs. pulse-skipping, temp grade) do not affect mechanical or electrical pin compatibility.
How does the EN/UV pin function on LT8607BEDC#TRMPBF, and what is its threshold accuracy?
The EN/UV pin on LT8607BEDC#TRMPBF has a precise 1.05V rising threshold (±60mV over temperature) and 1.00V falling threshold, providing 50mV hysteresis. When pulled below 1.00V, the part shuts down, drawing only 1µA. Tying to VIN enables always-on operation; a resistor divider from VIN allows programmable input undervoltage lockout, critical for battery-powered systems.
LT8607BEDC#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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
LT8607BEDC#TRMPBF FAQ
1.How can I place an order for LT8607BEDC#TRMPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8607BEDC#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 LT8607BEDC#TRMPBF reliable?
The price and inventory of LT8607BEDC#TRMPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8607BEDC#TRMPBF is usually 5 days.
3.What payment methods are accepted for LT8607BEDC#TRMPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8607BEDC#TRMPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8607BEDC#TRMPBF?
LT8607BEDC#TRMPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8607BEDC#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 LT8607BEDC#TRMPBF?
For technical support, including LT8607BEDC#TRMPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8607BEDC#TRMPBF requirements.
6.How does Aetrix verify that LT8607BEDC#TRMPBF is sourced from the original manufacturer or authorized distributors?
All LT8607BEDC#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 LT8607BEDC#TRMPBF meets industry standards.
7.What is the process for return or replacement of LT8607BEDC#TRMPBF?
All LT8607BEDC#TRMPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8607BEDC#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 LT8607BEDC#TRMPBF part is unused and in its original packaging.
Return procedure for LT8607BEDC#TRMPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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