My Inquiry
My Account
Analog Devices Inc. LT8606IMSE#PBF
- Part No.:
- LT8606IMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8606IMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,092
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT8606IMSE#PBF 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 3.3V/5V outputs for automotive infotainment power rails, industrial sensor nodes, and always-on IoT subsystems.
For engineers reviewing the LT8606IMSE#PBF datasheet, LT8606IMSE#PBF pinout, LT8606IMSE#PBF application, or LT8606IMSE#PBF equivalent, key selection criteria include ultralow IQ in Burst Mode (<3µA at 12VIN→3.3VOUT), ±8.5% power-good accuracy, 200kHz–2.2MHz programmable switching frequency via RT resistor, and AEC-Q100 qualification for automotive use.
Technical Context
The LT8606IMSE#PBF implements constant-frequency peak current mode control with internal 0.778V reference and slope compensation, enabling fast transient response and stable operation with small inductors (e.g., 6.8µH–10µH). Its architecture supports both Burst Mode (low-IQ, low-ripple regulation down to µA loads) and pulse-skipping modes, selectable via SYNC pin configuration.
Thermal management relies on the exposed pad (Pin 11, GND) soldered to PCB copper, achieving θJA = 40°C/W. The EN/UV pin provides accurate 1.05V rising threshold with 50mV hysteresis for VIN undervoltage lockout, while PG signals output regulation status within ±8.5% of setpoint and fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide automotive battery transients and industrial 24V/36V rails without external pre-regulation. |
| Quiescent Current | 1.7µA (non-switching) - enables >10-year battery life in always-on vehicle telematics and remote sensors. |
| Output Current | 350mA continuous - sufficient for powering microcontrollers, CAN transceivers, and analog front-ends in compact modules. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows trade-off between EMI filtering size and efficiency; 2MHz enables <3mm² total solution area. |
| Feedback Reference | 0.778V ±12mV - high-accuracy reference ensures tight output regulation across temperature and load. |
| Power Good Threshold | ±8.5% of VOUT - precise PG signaling enables reliable system sequencing and fault detection in safety-critical applications. |
| Minimum On-Time | 35ns - supports high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse skipping or frequency foldback. |
Pinout & Package
LT8606IMSE#PBF uses a 10-lead plastic MSOP package with exposed thermal pad (Pin 11) that must be soldered to PCB ground plane for thermal performance (θJA = 40°C/W).
| 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 maintaining top switch RDS(ON) at high duty cycles. |
| SW | Switch node connecting internal power FETs to inductor | High dv/dt node; must be minimized on PCB layout to reduce EMI and prevent false triggering of internal comparators. |
| INTVCC | Internal 3.5V regulator output | Bypass with ≥1µF low-ESR ceramic; powers gate drivers and control logic - not for external loading. |
| RT | Resistor-based oscillator frequency programming | Connect to GND with precision resistor (e.g., 18.2kΩ for 2MHz); sets fundamental switching frequency before spread-spectrum modulation. |
| SYNC | External clock synchronization input | Ground for Burst Mode; float for pulse-skipping; tie to INTVCC (3.2–5V) for spread-spectrum EMI reduction - absent in DFN variants. |
| TR/SS | Soft-start and output voltage tracking control | 2µA internal pull-up enables capacitor-programmed ramp rate; pulled low during fault - enables controlled power-up in multi-rail systems. |
| FB | Feedback input referenced to 0.778V internal reference | Voltage divider from VOUT sets output; 1% resistors recommended; 10pF phase-lead cap required for stability with high-value dividers. |
| PG | Open-drain power-good status indicator | Pulled low when VOUT is within ±8.5% of target and no faults - used for processor reset assertion or downstream enable sequencing. |
| EN/UV | Enable and input undervoltage lockout control | 1.05V rising threshold with 50mV hysteresis - external resistor divider enables programmable VIN cutoff (e.g., 6V for automotive cold-crank protection). |
| GND | Power and signal ground reference | Exposed pad (Pin 11) is GND and must be soldered to PCB thermal plane - primary path for heat dissipation and noise return. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 1.7µA non-switching current enables >10-year battery life in always-on automotive modules without compromising output ripple (<10mVP-P). |
| Spread Spectrum Modulation | Reduces peak radiated EMI by >10dB in CISPR25 Class 5 tests - eliminates need for bulky EMI filters in space-constrained automotive ECUs. |
| Fast Minimum On-Time | 35ns enables direct 42V-to-3.3V conversion at 2MHz without frequency foldback - preserves regulation during cold-crank transients. |
| Internal Compensation | Eliminates external compensation components - reduces BOM count and design cycle time while ensuring stability with 6.8µH–10µH inductors. |
| AEC-Q100 Grade I | Qualified for –40°C to +125°C junction operation - meets automotive reliability requirements for engine bay and cabin electronics. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powering ARM Cortex-M7 MCU, audio codec, and display backlight in head unit with 12V/24V battery input and cold-crank tolerance. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter providing regulated rail with PG sequencing for SoC boot and fault reporting. Use Value: 1.7µA IQ extends backup battery life during vehicle sleep mode; 42V input withstands load-dump transients up to ISO 7637-2 Pulse 5a. |
Use Scenario: Supplying ultra-low-power wireless sensor node (LoRaWAN/NB-IoT) operating from lithium-thionyl chloride battery for 15+ years. IC Role / Device Role / Timing Role: Always-on step-down regulator delivering 3.3V to MCU and RF transceiver with minimal self-discharge. Use Value: <3µA total input current at no load enables >10-year shelf life; 35ns min-on-time supports efficient 36V→3.3V conversion as battery depletes. |
| Medical Portable Monitor Rail | Test & Measurement Auxiliary Supply |
Use Scenario: Generating clean 5V rail for ADC reference, op-amps, and microcontroller in handheld ECG device powered by rechargeable Li-ion. IC Role / Device Role / Timing Role: Low-noise, low-ripple power stage with soft-start to prevent inrush into sensitive analog circuitry. Use Value: <10mVP-P output ripple in Burst Mode avoids digitization noise; TR/SS pin enables synchronized ramp-up with other rails in multi-supply systems. |
Use Scenario: Providing isolated 3.3V supply for digital logic and interface ICs in benchtop oscilloscope auxiliary power domain. IC Role / Device Role / Timing Role: Compact, high-efficiency secondary regulator replacing linear LDOs to reduce thermal load in dense PCB layouts. Use Value: 92% efficiency at 350mA eliminates heatsink requirement; 2MHz operation allows 10µH inductor <3mm × 3mm footprint. |
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 |
|---|---|---|---|
| LT8607IMSE#PBF | Higher 500mA output current; identical 1.7µA IQ, 35ns min-on-time, and MSOP-10 package. | Required where load exceeds 350mA (e.g., multi-core MCUs with DDR memory interface). | Select LT8607IMSE#PBF when higher output current is needed without changing layout or thermal design. |
| MP2451DJ-LF-P | 3A output, 2.5µA IQ, 4.5–36V input; no SYNC/TR/SS pins; SOIC-8 package; no AEC-Q100 qualification. | Suitable for cost-sensitive industrial power supplies where automotive qualification and advanced features are unnecessary. | Choose MP2451DJ-LF-P for non-automotive applications requiring higher current and lower BOM cost, accepting larger package and reduced feature set. |
Compared with LT8606IMSE#PBF, LT8607IMSE#PBF offers +150mA output headroom with identical efficiency and EMI performance, while MP2451DJ-LF-P trades automotive qualification and low-IQ optimization for higher current and lower unit cost in commercial-grade systems.
Availability
LT8606IMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor networks, and portable medical devices requiring stable component supply, long-lifecycle support, and AEC-Q100 compliance.
Supply support for LT8606IMSE#PBF 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 LT8606IMSE#PBF belongs to the Silent Switcher® family of high-efficiency, low-EMI DC/DC regulators designed specifically for automotive and noise-sensitive applications where compact size and ultralow quiescent current are critical.
FAQ
What is the guaranteed operating junction temperature range for LT8606IMSE#PBF?
The LT8606IMSE#PBF is guaranteed over the full –40°C to +125°C junction temperature range. This Grade I rating meets AEC-Q100 requirements for under-hood and cabin automotive applications, with thermal derating applied above 125°C to ensure long-term reliability. The exposed pad (Pin 11) must be soldered to PCB ground for effective heat transfer.
How does the SYNC pin affect LT8606IMSE#PBF operation in Burst Mode versus pulse-skipping mode?
When SYNC is grounded, LT8606IMSE#PBF operates in low-ripple Burst Mode with 1.7µA quiescent current. When SYNC is floated, it enters pulse-skipping mode with higher IQ (~several mA) but faster light-load response. Tying SYNC to INTVCC enables spread-spectrum modulation to reduce EMI peaks - a capability exclusive to the MSOP package used in LT8606IMSE#PBF.
Can LT8606IMSE#PBF regulate from 42V input down to 3.3V output at 2MHz switching frequency?
Yes, LT8606IMSE#PBF supports 42V-to-3.3V conversion at 2MHz due to its 35ns minimum on-time, eliminating frequency foldback. With RT = 18.2kΩ and proper layout (minimized SW node area), the part maintains regulation during cold-crank events while delivering 350mA with >85% efficiency - verified in typical application circuits per Analog Devices DC2564A demo board data.
What is the purpose of the TR/SS pin on LT8606IMSE#PBF, and how is it used for soft-start?
The TR/SS pin on LT8606IMSE#PBF provides user-programmable soft-start and output voltage tracking. An internal 2µA current source charges an external capacitor connected to TR/SS, creating a linear voltage ramp that controls FB regulation point during startup. This prevents inrush current into downstream capacitors and enables coordinated power-up with other rails in multi-voltage systems.
How does the PG pin on LT8606IMSE#PBF indicate output regulation status and fault conditions?
The PG pin on LT8606IMSE#PBF is an open-drain output that pulls low when VOUT is within ±8.5% of the programmed value and no faults (e.g., overtemperature, UVLO) are present. PG remains high-impedance if VIN < 3.2V or EN/UV is low. This precise window enables reliable system reset assertion and power sequencing in automotive and industrial controllers using LT8606IMSE#PBF.
LT8606IMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tube
- 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
LT8606IMSE#PBF FAQ
1.How can I place an order for LT8606IMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606IMSE#PBF 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 LT8606IMSE#PBF reliable?
The price and inventory of LT8606IMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606IMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8606IMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606IMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606IMSE#PBF?
LT8606IMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606IMSE#PBF 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 LT8606IMSE#PBF?
For technical support, including LT8606IMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606IMSE#PBF requirements.
6.How does Aetrix verify that LT8606IMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8606IMSE#PBF 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 LT8606IMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8606IMSE#PBF?
All LT8606IMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606IMSE#PBF, 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 LT8606IMSE#PBF part is unused and in its original packaging.
Return procedure for LT8606IMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT8606IMSE#PBF Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
