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Analog Devices Inc. LT8620MPMSE#TRPBF
- Part No.:
- LT8620MPMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8620MPMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,115
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Product details
Overview
LT8620MPMSE#TRPBF from Analog Devices (formerly Linear Technology) is a 65V, 2A synchronous step-down regulator in a thermally enhanced 16-lead MSOP package with exposed pad. It delivers up to 2A output current, operates from 3.4V to 65V input, achieves 94% efficiency at 1A/12VIN→5VOUT, and maintains ultralow 2.5µA quiescent current in Burst Mode - ideal for automotive always-on power rails and industrial remote sensors.
For engineers reviewing the LT8620MPMSE#TRPBF datasheet, LT8620MPMSE#TRPBF pinout, LT8620MPMSE#TRPBF application, or LT8620MPMSE#TRPBF equivalent, key selection criteria include its –55°C to 150°C extended temperature grade, 30ns minimum on-time for high VIN/VOUT ratios, internal compensation, and PG flag with ±9% output monitoring - all critical for ruggedized power supply design.
Technical Context
The LT8620MPMSE#TRPBF implements peak-current-mode control with internal compensation, enabling fast transient response and stable operation with small external inductors. Its 200kHz–2.2MHz programmable switching frequency (via RT resistor) supports optimization for size, EMI, or efficiency across wide input ranges.
Burst Mode® operation reduces quiescent current to 2.5µA while maintaining <10mVP-P output ripple; synchronization via SYNC pin allows EMI reduction through clock alignment. The EN/UV pin features a precise 1.0V threshold with 40mV hysteresis for reliable undervoltage lockout or shutdown control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 65V - supports direct connection to 48V industrial buses and automotive battery transients. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, FPGAs, and analog front-ends in harsh environments. |
| Quiescent Current | 2.5µA at no load - enables multi-year battery life in always-on IoT sensor nodes. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows trade-off between inductor size and efficiency in space-constrained designs. |
| Feedback Reference | 0.970V ±0.006V - enables accurate output regulation with minimal drift over temperature. |
| Minimum On-Time | 30ns - supports high step-down ratios (e.g., 48V→3.3V) without pulse-skipping instability. |
| Dropout Voltage | 250mV at 1A - ensures regulation under low-input-voltage conditions like cold-crank automotive scenarios. |
Pinout & Package
LT8620MPMSE#TRPBF uses the 16-lead plastic MSOP package (MSE) with exposed thermal pad (Pin 17, GND). θJA = 40°C/W, θJC(PAD) = 10°C/W. Exposed pad must be soldered to PCB for thermal performance and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor connection | Provides gate drive voltage > VIN for top NMOS switch; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| VIN | Main input power supply | Supplies internal circuitry and top switch; dual pins (1 & 2) reduce IR drop and improve thermal path. |
| EN/UV | Enable / input undervoltage lockout | 1.0V rising threshold with 40mV hysteresis; enables programmable VIN cutoff or system shutdown. |
| PG | Power good open-drain flag | Asserts high when VOUT is within ±9% of target; signals valid regulation and faults (e.g., overcurrent, UV). |
| SYNC | External clock synchronization input | Accepts 0–6V logic; ties low for Burst Mode, high for pulse-skipping, or external clock for EMI control. |
| INTVCC | Internal 3.4V regulator bypass | Must be decoupled with ≥1µF ceramic capacitor; powers internal logic and drivers; sourced from BIAS if VBIAS > 3.1V. |
| TR/SS | Soft-start and tracking control | 2µA internal pull-up enables capacitor-programmed VOUT ramp rate; also supports output voltage tracking during sequencing. |
| RT | Switching frequency programming | Resistor to GND sets fSW from 200kHz to 2.2MHz per RT = 46.5/fSW(MHz) – 5.2 (kΩ). |
| FB | Feedback reference node | Regulated to 0.970V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT for stability. |
| SW | Switch node | Connects to inductor and BST capacitor; high di/dt node requiring minimized PCB loop area for EMI control. |
| BIAS | Efficiency-optimized bias supply | Tie to VOUT (≥3.3V) to reduce VIN current draw and improve light-load efficiency. |
| GND | Power and signal ground | Includes exposed pad (Pin 17); must be soldered to large copper pour for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode® | 2.5µA input current at no load preserves battery life in always-on systems without sacrificing <10mVP-P ripple. |
| Wide Input Range | 3.4V to 65V operation accommodates 12V/24V/48V industrial rails and unregulated automotive inputs including cold-crank. |
| Fast Minimum On-Time | 30ns on-time enables high VIN/VOUT conversion (e.g., 48V→3.3V) without skipping cycles or losing regulation. |
| Integrated Power Switches | Top and bottom NMOS switches (175mΩ/85mΩ RDS(ON)) eliminate external MOSFETs and gate drivers, reducing BOM count and layout complexity. |
| Robust Protection Suite | Includes thermal shutdown, overcurrent limiting (top: 4.1A typ, bottom: 3.9A typ), and PG fault reporting for safe operation under overload or short-circuit. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering microcontrollers and CAN transceivers in vehicle door modules with battery input subject to load dump and cold-crank. IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator delivering 2A with 65V absolute max rating and –55°C to 150°C operation. Use Value: Maintains regulation during 24V cold-crank (down to ~6V) and survives 60V load dump transients without external TVS, reducing system cost and footprint. | Use Scenario: Providing isolated 5V rail for analog sensor interfaces and digital I/O in factory-floor programmable logic controllers. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC/DC converter operating from 24V industrial bus with strict EMC requirements. Use Value: Synchronization capability (SYNC pin) enables fixed-frequency operation aligned to system clock, minimizing conducted EMI in noise-sensitive measurement circuits. |
| Ruggedized IoT Edge Node | Avionics Remote Power Supply |
Use Scenario: Battery-powered environmental sensor node deployed in remote locations requiring multi-year operation. IC Role / Device Role / Timing Role: Always-on power management IC supplying 3.3V to MCU and RF transceiver with ultralow quiescent current. Use Value: 2.5µA IQ extends lithium-thionyl chloride battery life beyond 10 years in sleep mode, validated across –40°C to +85°C ambient. | Use Scenario: Distributed 5V power for cockpit display interface boards in commercial aircraft with stringent DO-160 lightning surge compliance. IC Role / Device Role / Timing Role: Radiation-tolerant (by design), high-reliability buck regulator supporting MIL-STD-704A input transients. Use Value: Extended –55°C to 150°C junction rating meets avionics thermal cycling requirements; exposed pad enhances thermal margin during sustained 2A loads. |
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 |
|---|---|---|---|
| LT8640SPMSE#TRPBF | Higher 4A output, same 65V input, 2.5µA IQ, but larger 20-lead QFN package and higher cost. | Required where >2A load current or tighter thermal constraints exist; not drop-in due to different pinout and layout. | Select when future-proofing for higher current or needing lower thermal resistance (θJA = 30°C/W). |
| LM5164QPWPRQ1 | 40V max input, 1A output, 14µA IQ, automotive AEC-Q100 Grade 1, SOIC-10 package. | Suitable for 12V automotive infotainment but lacks 65V rating and ultralow IQ for battery-backed systems. | Choose only for cost-sensitive 12V applications where extended input range and sub-µA IQ are unnecessary. |
Compared with LT8620MPMSE#TRPBF, LT8640SPMSE#TRPBF offers higher current headroom at the expense of board area and cost, while LM5164QPWPRQ1 trades input voltage range and quiescent current for automotive qualification and lower price - making LT8620MPMSE#TRPBF optimal for 2A, 65V, ultra-low-power industrial and automotive applications.
Availability
LT8620MPMSE#TRPBF is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, and ruggedized IoT sensor nodes requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LT8620MPMSE#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed by the acquisition of Linear Technology in 2017.
The LT8620MPMSE#TRPBF belongs to ADI's Power by Linear™ family of high-efficiency, high-voltage DC/DC regulators designed specifically for demanding industrial, automotive, and aerospace applications where reliability, wide input range, and ultralow quiescent current are essential.
FAQ
What is the operating temperature range of the LT8620MPMSE#TRPBF?
The LT8620MPMSE#TRPBF is rated for a junction temperature range of –55°C to 150°C and is 100% tested and guaranteed across this full range. This extended specification makes it suitable for under-hood automotive, downhole oil & gas, and military-grade applications where extreme thermal environments are encountered. Its MSE package with exposed pad ensures robust thermal performance even at maximum load.
How does the LT8620MPMSE#TRPBF achieve 2.5µA quiescent current?
The LT8620MPMSE#TRPBF achieves 2.5µA quiescent current through optimized Burst Mode® operation: during light loads, it delivers discrete energy pulses to the output capacitor and then enters deep sleep, disabling most internal circuitry. The 1.7µA base sleep current combines with minimal feedback divider current (e.g., <1µA with MΩ-level resistors) to reach 2.5µA total at no load - verified across the full –55°C to 150°C range.
Can the LT8620MPMSE#TRPBF synchronize to an external clock?
Yes, the LT8620MPMSE#TRPBF supports external clock synchronization via its SYNC pin. When driven with a logic-level clock (0–6V), the device aligns its switching edges to the external source, enabling deterministic EMI reduction and elimination of beat frequencies in multi-rail systems. This feature is fully functional across the entire 200kHz–2.2MHz operating range and remains active under all load conditions.
What is the purpose of the BIAS pin on the LT8620MPMSE#TRPBF?
The BIAS pin on the LT8620MPMSE#TRPBF provides an auxiliary power path for the internal regulator. When tied to VOUT (≥3.3V), it supplies INTVCC current instead of drawing from VIN, reducing input supply current and improving light-load efficiency. This is especially valuable in high-VIN applications (e.g., 48V→5V) where VIN-to-INTVCC conversion losses would otherwise degrade overall system efficiency.
Does the LT8620MPMSE#TRPBF support output voltage tracking during power-up?
Yes, the LT8620MPMSE#TRPBF supports output voltage tracking via the TR/SS pin. By applying a ramped voltage (e.g., from another regulator's soft-start pin) to TR/SS, the LT8620MPMSE#TRPBF regulates its FB pin to match that voltage until TR/SS exceeds 0.97V, after which it transitions to its internal 0.970V reference. This enables precise power sequencing in multi-rail systems such as FPGAs and processors without additional external circuitry.
LT8620MPMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (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):
- 3.4V
- Voltage - Input (Max):
- 65V
- Voltage - Output (Min/Fixed):
- 0.97V
- Voltage - Output (Max):
- 64.75V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8620MPMSE#TRPBF FAQ
1.How can I place an order for LT8620MPMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8620MPMSE#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 LT8620MPMSE#TRPBF reliable?
The price and inventory of LT8620MPMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8620MPMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8620MPMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8620MPMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8620MPMSE#TRPBF?
LT8620MPMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8620MPMSE#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 LT8620MPMSE#TRPBF?
For technical support, including LT8620MPMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8620MPMSE#TRPBF requirements.
6.How does Aetrix verify that LT8620MPMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8620MPMSE#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 LT8620MPMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8620MPMSE#TRPBF?
All LT8620MPMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8620MPMSE#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 LT8620MPMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8620MPMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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