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Analog Devices Inc. LT8606IMSE#TRPBF
- Part No.:
- LT8606IMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8606IMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
LT8606IMSE#TRPBF from Analog Devices is a 42V, 350mA synchronous step-down regulator in thermally enhanced 10-lead MSOP package, featuring 2.5µA quiescent current in Burst Mode, 35ns minimum on-time, and internal compensation for fast transient response. It delivers regulated 3.3V/5V outputs in automotive infotainment power rails and industrial sensor nodes requiring ultra-low standby power.
For engineers reviewing the LT8606IMSE#TRPBF datasheet, LT8606IMSE#TRPBF pinout, LT8606IMSE#TRPBF application, or LT8606IMSE#TRPBF equivalent, key selection criteria include input voltage range (3.0–42V), ultralow IQ regulation at light loads, ±8.5% power-good accuracy, and SYNC/TR/SS pin programmability for EMI-sensitive designs.
Technical Context
The LT8606IMSE#TRPBF implements peak current mode control with internal 0.778V reference and fixed-frequency PWM architecture. Its oscillator frequency is resistor-programmable from 200kHz to 2.2MHz via the RT pin, and it supports external synchronization, spread-spectrum modulation, soft-start, and output tracking through dedicated SYNC and TR/SS pins - all exclusive to the MSOP package variant.
Burst Mode operation enables <3µA input quiescent current when regulating 12VIN to 3.3VOUT, while maintaining output ripple below 10mVP-P. The device integrates top and bottom NMOS power switches (375mΩ/240mΩ typical RDS(ON)), features accurate 1V EN/UV threshold with 50mV hysteresis, and signals regulation status via open-drain PG pin with ±8.5% VOUT tolerance window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 42V - supports wide-range industrial and automotive battery inputs without pre-regulation. |
| Max Output Current | 350mA continuous - sufficient for powering microcontrollers, sensors, and interface ICs in compact systems. |
| Quiescent Current | 2.5µA in Burst Mode - enables >10-year battery life in always-on IoT endpoints with 100µA load. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows trade-off between inductor size (e.g., 10µH @ 2MHz) and efficiency. |
| Min On-Time | 35ns - enables high VIN/VOUT ratios (e.g., 42V→3.3V) without pulse-skipping instability. |
| Power-Good Accuracy | ±8.5% of VOUT - provides reliable system reset signaling for FPGA, MCU, or PMIC sequencing. |
| Enable Threshold | 1.05V rising, 1.00V falling - supports precise VIN undervoltage lockout using simple resistor divider. |
Pinout & Package
LT8606IMSE#TRPBF uses a 10-lead plastic MSOP package with exposed thermal pad (Pin 11 = GND), θJA = 40°C/W. The exposed pad must be soldered to PCB ground plane for thermal performance and EMI reduction.
| 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 100% duty-cycle capability. |
| 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; powers internal logic and drivers - not for external loading. |
| RT | Resistor-based oscillator frequency programming | Connect to GND with precision resistor (e.g., 18.2kΩ sets 2MHz); determines minimum off-time and inductor sizing. |
| SYNC | External clock synchronization / mode selection | Ground = Burst Mode; float = pulse-skipping; INTVCC = spread-spectrum - only available on MSOP package. |
| EN/UV | Enable and input undervoltage lockout control | 1.05V threshold with 50mV hysteresis - enables programmable VIN cutoff (e.g., 6V UVLO with R-divider). |
| PG | Open-drain power-good status indicator | Pulled low when VOUT within ±8.5% of target and no fault - used for system reset or sequencing enable. |
| TR/SS | Tracking and soft-start control | 2µA internal current source charges external capacitor to control VOUT ramp rate - prevents inrush in multi-rail systems. |
| FB | Feedback input for output voltage regulation | Regulated to 0.778V; resistor divider sets VOUT - total resistance impacts light-load IQ and stability. |
| GND | Power and signal ground reference | Exposed pad (Pin 11) must be soldered to PCB ground plane - primary thermal path and noise return. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA input current at no load maintains >90% efficiency down to 10µA output - essential for battery longevity. |
| Spread-Spectrum Modulation | Reduces peak radiated EMI by >10dB in CISPR25 Class 5 tests - eliminates need for external EMI filters in automotive designs. |
| Internal Compensation | Eliminates external compensation components - reduces BOM count and design cycle time for 3.3V/5V point-of-load applications. |
| Fast Minimum On-Time | 35ns enables direct 42V-to-3.3V conversion without intermediate stages - simplifies power architecture in high-input systems. |
| Programmable Soft-Start & Tracking | TR/SS pin allows controlled VOUT ramp rate and coordinated startup with other rails - prevents bus contention in multi-IC systems. |
Applications
| Automotive Infotainment Power | Industrial Sensor Node Supply |
|---|---|
Use Scenario: Powers display controller, audio codec, and CAN transceiver in head unit with 12V battery input subject to cold-crank (4.5V) and load-dump (42V) transients. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter with AEC-Q100 qualification, PG signaling for safe boot, and Burst Mode for parking-mode current budget. Use Value: Maintains 2.5µA IQ during vehicle sleep state, extending battery life beyond 30 days without recharge. |
Use Scenario: Supplies wireless sensor module (MCU + BLE + analog front-end) in remote condition-monitoring equipment powered by LiSOCl₂ battery. IC Role / Device Role / Timing Role: Always-on step-down regulator delivering stable 3.3V from 3.6V–36V input range, with soft-start preventing brownout during wake-up bursts. Use Value: Enables >15-year field lifetime by minimizing no-load current and supporting wide VIN without external LDO. |
| Medical Portable Diagnostic Device | Smart Building Controller |
Use Scenario: Provides isolated 5V rail for ADC, op-amps, and touch-screen controller in handheld ultrasound probe operating from rechargeable Li-ion pack. IC Role / Device Role / Timing Role: High-efficiency, low-noise buck converter with spread-spectrum EMI reduction to meet IEC 60601-1 EMC requirements. Use Value: Achieves <10mVP-P output ripple and passes CISPR25 Class 5 radiated emissions without ferrite beads or shielding. |
Use Scenario: Powers HVAC controller MCU, RS-485 transceiver, and temperature/humidity sensors from 24VAC/DC building supply with brownout resilience. IC Role / Device Role / Timing Role: Input-tolerant buck regulator with 3.0V–42V range, EN/UV programmable lockout, and PG-driven watchdog reset. Use Value: Ensures reliable operation during 24VAC zero-crossing dips and sustains regulation down to 3.2V input. |
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#TRPBF | Higher 500mA output current, identical pinout and feature set, same 35ns min on-time and 2.5µA IQ. | Required where load exceeds 350mA (e.g., dual-core MCU + radio), but increases solution size and cost. | Select LT8607IMSE#TRPBF if future-proofing for higher current or margin-critical designs; otherwise LT8606IMSE#TRPBF optimizes cost and footprint. |
| MP2451DT-LF-Z | 3A output, 2.5µA IQ, but lacks SYNC/TR/SS pins, PG, and spread-spectrum; max VIN = 36V, min on-time = 100ns. | Suitable for non-automotive, non-EMI-critical applications where 42V rating and precise sequencing are unnecessary. | Choose MP2451DT-LF-Z only for cost-sensitive consumer applications with VIN ≤36V and no PG/soft-start requirements. |
Compared with LT8607IMSE#TRPBF, the LT8606IMSE#TRPBF saves board space and BOM cost for sub-350mA loads while retaining identical EMI performance and automotive qualification; versus MP2451DT-LF-Z, it delivers superior high-VIN robustness, tighter regulation, and system-level control features essential for industrial and automotive use.
Availability
LT8606IMSE#TRPBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial sensor nodes, portable medical diagnostics, and smart building controllers requiring stable component supply across extended temperature ranges (–40°C to 125°C).
Supply support for LT8606IMSE#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 LT8606IMSE#TRPBF belongs to the LT® monolithic synchronous buck regulator product line, engineered for ultralow quiescent current, high input voltage tolerance, and EMI-optimized operation in space-constrained, battery-sensitive applications.
FAQ
What is the guaranteed operating junction temperature range for LT8606IMSE#TRPBF?
The LT8606IMSE#TRPBF is guaranteed over the full –40°C to 125°C operating junction temperature range (I-grade). This specification is assured by design, characterization, and statistical process controls - making it suitable for under-hood automotive and industrial environments where ambient temperatures exceed 85°C.
Does LT8606IMSE#TRPBF support external frequency synchronization?
Yes, the LT8606IMSE#TRPBF supports external frequency synchronization via its dedicated SYNC pin (Pin 5). When driven by an external clock source, the device synchronizes its switching frequency and operates in pulse-skipping mode - enabling deterministic EMI reduction and elimination of beat frequencies in multi-converter systems.
How does the TR/SS pin function in LT8606IMSE#TRPBF during power-up?
The TR/SS pin in LT8606IMSE#TRPBF sources a precise 2µA current to charge an external capacitor, controlling the output voltage ramp rate during startup. When TR/SS voltage is below 0.778V, the LT8606IMSE#TRPBF regulates FB to match TR/SS voltage - enabling soft-start and output voltage tracking with other rails in multi-supply systems.
What is the minimum input voltage required for LT8606IMSE#TRPBF to regulate a 3.3V output?
The LT8606IMSE#TRPBF requires a minimum input voltage of 3.0V to regulate a 3.3V output, as specified in the Electrical Characteristics table. Below this threshold, the internal UVLO circuit holds EN/UV inactive, preventing switching and ensuring predictable shutdown behavior during brownout conditions.
Can LT8606IMSE#TRPBF operate without an external RT resistor?
No, the LT8606IMSE#TRPBF requires an external RT resistor tied from Pin 4 to GND to set its switching frequency. Without this resistor, the oscillator remains unconfigured and the device will not switch. The RT value determines frequency from 200kHz to 2.2MHz - e.g., 18.2kΩ sets 2MHz operation per Table 1 in the datasheet.
LT8606IMSE#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
LT8606IMSE#TRPBF FAQ
1.How can I place an order for LT8606IMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8606IMSE#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 LT8606IMSE#TRPBF reliable?
The price and inventory of LT8606IMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8606IMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8606IMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8606IMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8606IMSE#TRPBF?
LT8606IMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8606IMSE#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 LT8606IMSE#TRPBF?
For technical support, including LT8606IMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8606IMSE#TRPBF requirements.
6.How does Aetrix verify that LT8606IMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8606IMSE#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 LT8606IMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8606IMSE#TRPBF?
All LT8606IMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8606IMSE#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 LT8606IMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8606IMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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