LT8620
RECOMMENDED FOR NEW DESIGNS65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current
- Part Models
- 12
- 1ku List Price
- Starting From $5.67
Overview
- Wide Input Voltage Range: 3.4V to 65V
- Ultralow Quiescent Current Burst Mode® Operation:
- 2.5μA IQ Regulating 12VIN to 3.3VOUT
- Output Ripple < 10mVP-P
- High Efficiency Synchronous Operation:
- 94% Efficiency at 1A, 12VIN to 5VOUT
- 92% Efficiency at 1A, 12VIN to 3.3VOUT
- Fast 30ns Minimum Switch-On Time
- Low Dropout Under All Conditions: 250mV at 1A
- Safely Tolerates Inductor Saturation in Overload
- Low EMI
- Adjustable and Synchronizable: 200kHz to 2.2MHz
- Accurate 1V Enable Pin Threshold
- Internal Compensation
- Output Soft-Start and Tracking
- Small Thermally Enhanced 16-Lead MSOP and 24-Lead 3mm × 5mm QFN Packages
The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that accepts a wide input voltage range up to 65V, and consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8620 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8620 is available in small 16-Lead MSOP and 3mm × 5mm QFN packages with exposed pads for low thermal resistance.
Applications
- Automotive and Industrial Supplies
- General Purpose Step-Down
- GSM Power Supplies
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT8620EMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT8620EMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LT8620EUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LT8620EUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LT8620HMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT8620HMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LT8620IMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT8620IMSE#TRPBF | 16-Lead MSOP w/ EP | ||
| LT8620IUDD#PBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LT8620IUDD#TRPBF | 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) | ||
| LT8620MPMSE#PBF | 16-Lead MSOP w/ EP | ||
| LT8620MPMSE#TRPBF | 16-Lead MSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 17, 2025 - 25_0119 Bond Wire Change from Gold to Copper (Automotive) |
||
| LT8620EMSE#PBF | PRODUCTION | |
| LT8620EMSE#TRPBF | PRODUCTION | |
|
Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2) |
||
| LT8620EMSE#PBF | PRODUCTION | |
| LT8620EMSE#TRPBF | PRODUCTION | |
| LT8620IMSE#PBF | PRODUCTION | |
| LT8620IMSE#TRPBF | PRODUCTION | |
|
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC |
||
| LT8620EMSE#PBF | PRODUCTION | |
| LT8620EMSE#TRPBF | PRODUCTION | |
| LT8620HMSE#PBF | PRODUCTION | |
| LT8620HMSE#TRPBF | PRODUCTION | |
| LT8620IMSE#PBF | PRODUCTION | |
| LT8620IMSE#TRPBF | PRODUCTION | |
| LT8620MPMSE#PBF | PRODUCTION | |
| LT8620MPMSE#TRPBF | PRODUCTION | |
|
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process |
||
| LT8620EMSE#PBF | PRODUCTION | |
| LT8620EMSE#TRPBF | PRODUCTION | |
| LT8620EUDD#PBF | PRODUCTION | |
| LT8620EUDD#TRPBF | PRODUCTION | |
| LT8620HMSE#PBF | PRODUCTION | |
| LT8620HMSE#TRPBF | PRODUCTION | |
| LT8620IMSE#PBF | PRODUCTION | |
| LT8620IMSE#TRPBF | PRODUCTION | |
| LT8620IUDD#PBF | PRODUCTION | |
| LT8620IUDD#TRPBF | PRODUCTION | |
| LT8620MPMSE#PBF | PRODUCTION | |
| LT8620MPMSE#TRPBF | PRODUCTION | |
|
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package |
||
| LT8620HMSE#PBF | PRODUCTION | |
| LT8620HMSE#TRPBF | PRODUCTION | |
| LT8620MPMSE#PBF | PRODUCTION | |
| LT8620MPMSE#TRPBF | PRODUCTION | |
|
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices |
||
| LT8620HMSE#PBF | PRODUCTION | |
| LT8620HMSE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT8620
LTpowerCAD 1
Design tools for the following parts are available in LTpowerCAD:
- LT8620
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A