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Analog Devices Inc. LT8620MPMSE#PBF
- Part No.:
- LT8620MPMSE#PBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8620MPMSE#PBF.pdf
- Description:
- IC REG BUCK ADJ 2A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:797
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Product details
Overview
LT8620MPMSE#PBF from Analog Devices (formerly Linear Technology) is a 65V input, 2A synchronous step-down regulator with 2.5µA quiescent current in Burst Mode operation, 30ns minimum on-time, and internal compensation - designed for automotive, industrial, and battery-powered systems requiring ultra-low standby power and wide VIN range.
For engineers reviewing the LT8620MPMSE#PBF datasheet, LT8620MPMSE#PBF pinout, LT8620MPMSE#PBF application, or LT8620MPMSE#PBF equivalent, this page delivers verified specifications, thermal-grade packaging details (–55°C to 150°C), real-world efficiency curves at 3.3V/5V outputs, and validated alternatives for high-reliability DC/DC conversion.
Technical Context
The LT8620MPMSE#PBF implements peak-current-mode control with internal compensation, enabling fast transient response and stable loop behavior using small external inductors. Its 30ns minimum on-time supports high VIN-to-VOUT ratios (e.g., 48V→3.3V) without pulse-skipping instability.
Burst Mode operation maintains <10mVP-P output ripple while drawing only 2.5µA IQ at no load; synchronization via SYNC pin allows external clock alignment from 200kHz to 2.2MHz, and EN/UV provides accurate 1V threshold shutdown with 40mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.4V to 65V - supports 12V/24V/48V automotive and industrial rails, including cold-crank and load-dump transients. |
| Output Current | 2A continuous - sustained at full rating with proper PCB thermal design and 16-lead MSOP exposed pad soldered to ground plane. |
| Quiescent Current | 2.5µA at 12VIN→3.3VOUT - enables >10-year battery life in always-on IoT sensors and telematics modules. |
| Switching Frequency | 200kHz to 2.2MHz (RT-programmable) - allows optimization of size vs. efficiency; 700kHz typical in 5V/2A reference design. |
| Feedback Reference | 0.970V ±0.006V - enables precise output regulation; line/load regulation ≤0.02%/V and ≤0.15% over full load range. |
| Minimum On-Time | 30ns - permits high step-down ratios (e.g., 48V→3.3V at 700kHz) without duty-cycle limitation or frequency foldback. |
| Thermal Rating | –55°C to 150°C junction - fully tested and guaranteed for extended-temperature automotive engine control and downhole instrumentation. |
Pinout & Package
LT8620MPMSE#PBF is housed in a thermally enhanced 16-lead plastic MSOP package (MSE) with exposed pad (Pin 17) that must be soldered to PCB ground for θJC(PAD) = 10°C/W thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap Supply | Drives top NMOS gate above VIN; requires 0.1µF ceramic capacitor placed adjacent to IC. |
| VIN | Main Input Power | Supplies internal circuitry and top switch; dual pins (1 & 2) must be tied together and locally bypassed with low-ESR capacitor. |
| EN/UV | Enable / UVLO Input | 1.0V rising threshold enables operation; used to program input undervoltage lockout or system shutdown. |
| PG | Power Good Flag | Open-drain output signals VOUT within ±9% of target and absence of fault; valid when VIN > 3.4V. |
| SYNC | Frequency Synchronization | Accepts external clock (200kHz–2.2MHz) or DC high for pulse-skipping mode; tie low for Burst Mode. |
| INTVCC | Internal 3.4V Regulator Output | Bypass with ≥1µF ceramic cap; powers internal logic; draws current from BIAS if VBIAS > 3.1V. |
| TR/SS | Soft-Start / Tracking | Capacitor-programmed voltage ramp rate; also accepts external tracking reference for multi-rail sequencing. |
| RT | Frequency Set Resistor | Resistor to ground sets switching frequency per RT = 46.5/fSW(MHz) – 5.2 (kΩ). |
| SW | Switch Node | Connection point for inductor and boost capacitor; must be minimized on PCB to reduce EMI. |
| FB | Feedback Input | Regulated to 0.970V; connects to resistor divider tap; requires 4.7–10pF phase-lead capacitor to VOUT. |
| BIAS | Bias Supply Input | When tied to VOUT ≥3.3V, reduces VIN current draw and improves light-load efficiency. |
| GND | Power Ground | Reference for all internal circuits; exposed pad (Pin 17) is GND and must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow IQ Burst Mode | 2.5µA input current at no load preserves battery life in always-on applications without sacrificing output ripple (<10mVP-P). |
| Wide Input Range | 3.4V–65V operation accommodates 12V/24V/48V systems and withstands automotive load dump (ISO 7637-2) with proper input filtering. |
| Fast Minimum On-Time | 30ns on-time enables high VIN/VOUT ratios (e.g., 48V→3.3V @ 700kHz) without requiring external frequency foldback. |
| Low Dropout Operation | 250mV dropout at 1A ensures regulation under high-duty-cycle conditions, critical for battery-powered systems near end-of-life. |
| Robust Fault Protection | Integrated overcurrent, overtemperature, and PG fault signaling enable safe operation in harsh environments without external supervision. |
| Thermally Enhanced MSE | –55°C to 150°C guaranteed operation with exposed-pad MSOP package supports under-hood and industrial control applications. |
Applications
| Automotive Infotainment Power | Industrial PLC I/O Module |
|---|---|
Use Scenario: Powering 3.3V/5V logic and interface ICs in head units with cold-crank (4.5V) and load-dump (60V) transients. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated 3.3V/5V from 12V battery rail with ultralow IQ during sleep mode. Use Value: 2.5µA quiescent current prevents battery drain during vehicle off-state; 65V rating eliminates need for upstream TVS clamping. |
Use Scenario: Providing isolated 5V supply for digital I/O channels in programmable logic controllers operating in factory environments. IC Role / Device Role / Timing Role: Compact, high-efficiency DC/DC converter powering microcontrollers and level-shifters from 24V industrial bus. Use Value: 16-lead MSOP package fits dense PCB layouts; –55°C to 150°C rating ensures reliability in uncooled control cabinets. |
| GSM Base Station RF Power | Downhole Oilfield Sensor |
Use Scenario: Generating clean 5V bias for RF power amplifiers in remote cellular base stations powered by solar/battery hybrid systems. IC Role / Device Role / Timing Role: High-efficiency, low-noise step-down regulator supporting burst-mode transmission with minimal standby loss. Use Value: <10mVP-P output ripple avoids AM interference in sensitive RF front-ends; 700kHz switching avoids critical GSM bands. |
Use Scenario: Powering MEMS pressure/temperature sensors in oil/gas wellbores where ambient temperature exceeds 125°C. IC Role / Device Role / Timing Role: Extended-temperature DC/DC converter deriving 3.3V from high-voltage battery string (up to 60V) in sealed probe housing. Use Value: Fully tested –55°C to 150°C operation eliminates derating concerns; robust BIAS pin operation simplifies layout in confined spaces. |
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 |
|---|---|---|---|
| LTC3310S | 4.5V–22V input, 10A output, 1.5µA IQ, 5mm × 6mm QFN - higher current, lower VIN max, smaller package. | Best for space-constrained 12V systems needing >2A; not suitable for 48V or extended-temp automotive use. | Select LTC3310S only when input voltage stays below 22V and output current exceeds 2A with tighter board area limits. |
| MPQ4420AGL-A | 3.3V–40V input, 2A output, 17µA IQ, -40°C to 125°C - wider temp range than standard grade but not extended (-55°C). | Cost-sensitive industrial designs where 65V rating and sub-3µA IQ are not required. | Choose MPQ4420AGL-A for non-automotive 24V systems prioritizing cost over ultra-low IQ or extreme temperature capability. |
Compared with LTC3310S and MPQ4420AGL-A, LT8620MPMSE#PBF uniquely combines 65V tolerance, 2.5µA IQ, and –55°C to 150°C operation - making it the only option for high-reliability, wide-input, ultra-low-power applications in automotive and energy exploration.
Availability
LT8620MPMSE#PBF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLCs, and downhole sensor systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT8620MPMSE#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance power management ICs with rigorous automotive and industrial qualification standards.
The LT8620MPMSE#PBF belongs to the LT86xx family of high-efficiency, ultralow-IQ synchronous regulators engineered for battery-powered and harsh-environment applications demanding wide VIN, fast transient response, and extended temperature operation.
FAQ
What is the guaranteed operating temperature range for LT8620MPMSE#PBF?
The LT8620MPMSE#PBF is 100% tested and guaranteed over the full –55°C to 150°C junction temperature range. This extended rating distinguishes it from commercial (E), industrial (I), and high-temp (H) grades, making it suitable for under-hood automotive and downhole oilfield applications where ambient temperatures exceed 125°C.
How does LT8620MPMSE#PBF achieve 2.5µA quiescent current?
The LT8620MPMSE#PBF achieves 2.5µA quiescent current through optimized Burst Mode operation: during light loads, it delivers discrete current pulses to the output capacitor and enters deep sleep between bursts, reducing internal circuit activity. The 1.7µA base sleep current plus feedback divider contribution yields the typical 2.5µA total at no load.
Can LT8620MPMSE#PBF synchronize to an external clock?
Yes, LT8620MPMSE#PBF supports external clock synchronization via the SYNC pin. When driven with a logic-level signal from 200kHz to 2.2MHz, the device aligns its switching edges to the external clock and operates in pulse-skipping mode - useful for EMI reduction in noise-sensitive systems like medical or RF equipment.
What is the purpose of the BIAS pin on LT8620MPMSE#PBF?
The BIAS pin on LT8620MPMSE#PBF supplies current to internal regulators when biased ≥3.1V - typically tied to VOUT for outputs ≥3.3V. This reduces VIN current draw, improves light-load efficiency, and lowers thermal stress on the input path, especially beneficial in high-VIN applications like 48V industrial systems.
Does LT8620MPMSE#PBF require external compensation components?
No, LT8620MPMSE#PBF features internal compensation based on peak-current-mode architecture, eliminating the need for external compensation networks. This simplifies design, reduces bill-of-materials count, and ensures stable loop behavior across all operating conditions with only the RT resistor and output LC filter required.
LT8620MPMSE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (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):
- 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#PBF FAQ
1.How can I place an order for LT8620MPMSE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8620MPMSE#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 LT8620MPMSE#PBF reliable?
The price and inventory of LT8620MPMSE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8620MPMSE#PBF is usually 5 days.
3.What payment methods are accepted for LT8620MPMSE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8620MPMSE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8620MPMSE#PBF?
LT8620MPMSE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8620MPMSE#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 LT8620MPMSE#PBF?
For technical support, including LT8620MPMSE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8620MPMSE#PBF requirements.
6.How does Aetrix verify that LT8620MPMSE#PBF is sourced from the original manufacturer or authorized distributors?
All LT8620MPMSE#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 LT8620MPMSE#PBF meets industry standards.
7.What is the process for return or replacement of LT8620MPMSE#PBF?
All LT8620MPMSE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8620MPMSE#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 LT8620MPMSE#PBF part is unused and in its original packaging.
Return procedure for LT8620MPMSE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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