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Analog Devices Inc. LT8606EMSE#TRPBF
- Part No.:
- LT8606EMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8606EMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,498
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Product details
Overview
LT8606EMSE#TRPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in thermally enhanced 10-lead MSOP package, featuring 1.7µA non-switching quiescent current, 35ns minimum on-time, and peak current mode control with internal compensation. It delivers regulated 5V/350mA output from 12V input at >92% efficiency and supports ultralow-power automotive body electronics and industrial sensors.
For engineers reviewing the LT8606EMSE#TRPBF datasheet, LT8606EMSE#TRPBF pinout, LT8606EMSE#TRPBF application, or LT8606EMSE#TRPBF equivalent, key selection criteria include Burst Mode® operation for <3µA IQ at light load, ±8.5% power-good accuracy, 200kHz–2.2MHz programmable switching frequency via RT resistor, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8606EMSE#TRPBF implements constant-frequency peak current mode control with internal 0.778V reference and slope compensation, enabling fast transient response and stable loop behavior with small external components. Its architecture integrates high-side and low-side NMOS switches (375mΩ/240mΩ RDS(ON)) and supports programmable soft-start/tracking via TR/SS pin.
It features dual-mode operation: Burst Mode® (SYNC grounded) for ultralow IQ (<3µA) and low ripple (<10mVP-P), or pulse-skipping (SYNC floating) with spread-spectrum modulation capability for EMI reduction. The EN/UV pin provides accurate 1.05V enable threshold with 50mV hysteresis for VIN undervoltage lockout.
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. |
| Quiescent Current (Burst Mode) | 1.7µA (non-switching), <3µA regulating 12VIN to 3.3VOUT - enables multi-year battery life in always-on sensor nodes. |
| Max Continuous Output Current | 350mA - sufficient for powering microcontrollers, CAN transceivers, and analog front-ends without external boost. |
| Switching Frequency Range | 200kHz to 2.2MHz - set by RT resistor; allows optimization of inductor size vs. efficiency (e.g., 2MHz enables 10µH inductors). |
| Feedback Reference Voltage | 0.778V ±0.004V - tight tolerance enables accurate output regulation across temperature and load. |
| Power Good Accuracy | ±8.5% window around VFB - ensures reliable system reset and sequencing in safety-critical applications. |
| Minimum On-Time | 35ns - enables high step-down ratios (e.g., 42V→3.3V) at 2MHz without pulse skipping. |
Pinout & Package
LT8606EMSE#TRPBF uses a thermally enhanced 10-lead MSOP package (θJA = 40°C/W) with exposed pad (Pin 11) soldered to PCB ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side NMOS gate drive | Requires 0.1µF ceramic capacitor to SW; critical for maintaining top switch RDS(ON) and efficiency above 12VIN. |
| SW | Switch node connecting internal 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 drivers; max 20mA load capacity. |
| RT | Resistor-based oscillator frequency programming | Connect to GND via resistor (e.g., 18.2kΩ sets 2MHz); determines minimum off-time and duty-cycle limits. |
| SYNC | External clock synchronization / mode selection | Ground for Burst Mode; float for pulse-skipping; tie to INTVCC for spread-spectrum - only available on MSOP variant. |
| EN/UV | Enable and input undervoltage lockout | 1.05V rising threshold with 50mV hysteresis; enables programmable VIN cutoff (e.g., 6V UVLO using resistor divider). |
| PG | Open-drain power-good indicator | Pulled low when VOUT is within ±8.5% of target; requires external pull-up for MCU reset or sequencing control. |
| TR/SS | Soft-start and output voltage tracking | 2µA internal current source enables RC-programmed ramp rate; supports power sequencing with other rails. |
| FB | Feedback input for output voltage regulation | Regulated to 0.778V; resistor divider sets VOUT; 1% resistors recommended for ±1% output accuracy. |
| GND | Power and signal ground reference | Exposed pad (Pin 11) must be soldered to large PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode® | 1.7µA non-switching current enables >10-year battery life in always-on IoT sensors and telematics modules. |
| 35ns Minimum On-Time | Supports direct 42V-to-3.3V conversion at 2MHz without frequency foldback or duty-cycle limitation. |
| Integrated Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB in CISPR25 Class 5 tests - eliminates need for external EMI filters in automotive designs. |
| AEC-Q100 Qualified (Grade E) | Rated for –40°C to +125°C junction temperature; qualified for automotive body electronics, infotainment, and ADAS subsystems. |
| Internal Compensation | Eliminates external compensation network; reduces BOM count and design cycle time while ensuring stability with 10µH inductors. |
Applications
| Automotive Body Control Module (BCM) | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powering LIN transceivers, door lock actuators, and ambient light sensors from 12V battery with cold-crank survival down to 3V. IC Role / Device Role / Timing Role: Primary 3.3V/350mA buck converter providing regulated rail with <3µA quiescent current during sleep mode. Use Value: Enables BCM to meet ISO 16750-2 "battery disconnect" requirements and extends vehicle parasitic draw budget by >50%. | Use Scenario: Supplying 5V/200mA to wireless sensor transmitters (LoRaWAN, NB-IoT) deployed in remote locations with 10-year battery life targets. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating in Burst Mode® to minimize no-load current draw. Use Value: Achieves <3µA system standby current, enabling primary lithium thionyl chloride batteries to last >12 years at 10-second wake intervals. |
| Medical Portable Diagnostic Device | Avionics Cabin Monitoring System |
Use Scenario: Generating clean 5V rail for ADCs, op-amps, and Bluetooth LE radios in handheld ultrasound and glucose meters. IC Role / Device Role / Timing Role: Low-noise, low-ripple power supply with <10mVP-P output ripple in Burst Mode® operation. Use Value: Prevents switching noise coupling into sensitive analog signal chains, eliminating post-processing filtering and reducing BOM cost. | Use Scenario: Powering smoke detectors, occupancy sensors, and LED indicators in aircraft cabin systems requiring DO-160G compliance. IC Role / Device Role / Timing Role: Input-capable 42V buck converter with spread-spectrum EMI reduction and AEC-Q100 reliability. Use Value: Passes DO-160G Section 20 radiated emissions without shielding, simplifying certification and reducing enclosure weight. |
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 |
|---|---|---|---|
| LT8607EMSE#TRPBF | Same 10-lead MSOP package; adds integrated 1.2A MOSFETs and higher 1.2A output current capability. | Supports higher-current loads (e.g., FPGA core rails) but consumes more board area and costs more. | Select LT8607EMSE#TRPBF when output current exceeds 350mA or when future-proofing for higher load growth is required. |
| MPQ4420AGL-A-Z | Monolithic 42V/2A buck; 17µA IQ in forced PWM mode; no Burst Mode®; 200kHz–2.5MHz sync range. | Lacks ultralow-IQ Burst Mode® and ±8.5% PG accuracy; not AEC-Q100 qualified. | Choose MPQ4420AGL-A-Z for cost-sensitive industrial applications where IQ >10µA is acceptable and automotive qualification is unnecessary. |
Compared with LT8607EMSE#TRPBF, LT8606EMSE#TRPBF offers lower cost and smaller solution size for ≤350mA loads, while MPQ4420AGL-A-Z trades away critical automotive and ultralow-power features for higher current and lower unit price in non-automotive settings.
Availability
LT8606EMSE#TRPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, portable medical diagnostics, and avionics cabin monitoring systems requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant performance.
Supply support for LT8606EMSE#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 LT8606 series belongs to Analog Devices' Power by Linear™ portfolio, designed specifically for high-input-voltage, ultralow-quiescent-current DC/DC conversion in space-constrained and battery-sensitive automotive and industrial applications.
FAQ
What is the maximum input voltage rating for the LT8606EMSE#TRPBF?
The LT8606EMSE#TRPBF has an absolute maximum input voltage rating of 42V on the VIN and EN/UV pins. Operation up to this limit is supported across its full –40°C to +125°C junction temperature range, making it suitable for 24V and 42V automotive battery systems including load-dump transients. Exceeding 42V risks permanent damage per Absolute Maximum Ratings.
Does the LT8606EMSE#TRPBF support synchronization to an external clock?
Yes, the LT8606EMSE#TRPBF supports external clock synchronization via its dedicated SYNC pin (Pin 5), which is present only on the MSOP package. When driven with a TTL/CMOS clock between 200kHz and 2.2MHz, the device synchronizes its switching frequency and operates in pulse-skipping mode. This capability is absent in DFN variants like LT8606EDC#TRPBF.
How does the LT8606EMSE#TRPBF achieve <3µA quiescent current?
The LT8606EMSE#TRPBF achieves <3µA quiescent current through patented Burst Mode® operation: during light loads, it delivers discrete energy bursts to the output capacitor, then enters deep sleep with only bias circuitry active (1.7µA). Between bursts, all switching and control circuitry is powered down, minimizing input current while maintaining <10mVP-P output ripple - a key differentiator versus conventional pulse-skipping regulators.
Is the LT8606EMSE#TRPBF qualified for automotive applications?
Yes, the LT8606EMSE#TRPBF is AEC-Q100 qualified for automotive applications (Grade E, –40°C to +125°C). It undergoes stress testing for temperature cycling, humidity, and mechanical shock per automotive reliability standards. This qualification is explicitly stated in the Analog Devices ordering table and applies to all LT8606EMSE#TRPBF units shipped with #WPBF or #WTRPBF suffixes - though standard #TRPBF parts share identical die and qualification status.
What is the function of the TR/SS pin on the LT8606EMSE#TRPBF?
The TR/SS (Track/Soft-Start) pin on the LT8606EMSE#TRPBF serves two functions: (1) Soft-start - an internal 2µA current source charges an external capacitor to program output voltage ramp rate; (2) Tracking - when driven below 0.778V, it forces the FB pin to regulate to the TR/SS voltage, enabling precise power-rail sequencing with other converters. This pin is exclusive to MSOP packages and omitted in DFN variants.
LT8606EMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) 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:
- 350mA
- Frequency - Switching:
- 200kHz ~ 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-EP
LT8606EMSE#TRPBF FAQ
1.How can I place an order for LT8606EMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606EMSE#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 LT8606EMSE#TRPBF reliable?
The price and inventory of LT8606EMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606EMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8606EMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606EMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606EMSE#TRPBF?
LT8606EMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606EMSE#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 LT8606EMSE#TRPBF?
For technical support, including LT8606EMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606EMSE#TRPBF requirements.
6.How does Aetrix verify that LT8606EMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8606EMSE#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 LT8606EMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8606EMSE#TRPBF?
All LT8606EMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606EMSE#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 LT8606EMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8606EMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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