LT8610A
LT8610AB
42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current
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Alternative Parts
Overview
Features and Benefits
- LT8610 Feature Set, Plus:
- 3.5A Maximum Output Current Fast
- 30ns Minimum Switch-On Time
- Improved Burst Mode Efficiency (LT8610AB Only)
- Improved EMI
- Wide Input Voltage Range: 3.4V to 42V
- Ultralow Quiescent Current Burst Mode® Operation:
- 2.5μA IQ Regulating 12VIN to 3.3VOUT
- Fixed Output Voltages: 3.3V, 5V
- Output Ripple < 10mVP-P (LT8610A Only)
- High Efficiency Synchronous Operation:
- 95% Efficiency at 1A, 5VOUT from 12VIN
- 93% Efficiency at 1A, 3.3VOUT from 12VIN
- Low Dropout Under All Conditions: 200mV at 1A
- Safely Tolerates Inductor Saturation in Overload
- Adjustable and Synchronizable Frequency:
- 200kHz to 2.2MHz
- Accurate 1V Enable Pin Threshold
- Output Soft-Start and Tracking
- Small Thermally Enhanced 16-Lead MSOP Package
- AEC-Q100 Qualified for Automotive Applications
Product Details
The LT8610A/LT8610AB series are compact, high efficiency, high speed synchronous monolithic step-down switching regulators that consume only 2.5μA of quiescent current. Compared to the LT8610, they have higher maximum output currents of 3.5A and a faster minimum switch-on time of 30ns. The LT8610A has the same low ripple burst mode performance of the LT8610, while the LT8610AB has even higher light load efficiency.
The other features of the LT8610 remain unchanged in the LT8610A/LT8610AB series. A SYNC pin allows synchronization to an external clock. The EN/UV pin has an accurate 1V threshold for VIN undervoltage lockout or shut down. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions.
| FEEDBACK VOLTAGE | MIN VIN | OUTPUT CURRENT | NOTES | |
| LT8610AC-1 | 0.80V | 3.0V | 3.5A | Fsw = 1.5MHz to 2.2MHz, Optimized Transient Response |
| LT8610AC | 0.80V | 3.0V | 3.5A | Fsw = 200kHz to 2.2MHz |
| LT8610AB | 0.97V | 3.4V | 3.5A | Improved Burst Mode Efficiency |
| LT8610AX | 0.97V | 3.4V | 3.5A | 175°C Max Junction Temp |
| LT8610A | 0.97V | 3.4V | 3.5A | Higher Iout, 30ns Min On Time |
| LT8610 | 0.97V | 3.4V | 2.5A | - |
APPLICATIONS
- Automotive and Industrial Supplies
- GSM Power Supplies
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
-
R570 Reliability Data3/23/2018PDF415 K
-
DC2139A - Demo Manual7/2/2014PDF584K
-
DC2012A - Demo Manual1/17/2014PDF204K
Tools & Simulations
LTspice
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
LT8610
LT8610A
LT8610AB
LT8610AC
LTpowerCAD
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.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
Design tools for the following parts are available in LTpowerCAD:
LT8610
LT8610A
LT8610AB
Design Resources
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.
PCN-PDN Information
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.