LT7101
105V, 1A Low EMI Synchronous Step-Down Regulator with Fast Current Programming PassThru
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Overview
Features and Benefits
- Wide VIN Range: 4.4V to 105V (110V Abs Max)
- Ultralow EMI/EMC Emissions: CISPR 25 Compliant
- 2µA IQ When Regulating 48VIN to 3.3VOUT
- Fast and Accurate Output Current Programming and Monitoring with No External RSENSE
- Brick Wall Current Limit
- Low Minimum On-Time: 35ns
- Wide VOUT Range: 1V to VIN
- 100% Maximum Duty Cycle Operation
- Programmable Fixed Frequency: 200kHz to 2MHz
- Eight, Pin-Selectable Fixed (1.2V to 15V) or Adjustable Output Voltages
- Selectable Continuous, Pulse-Skipping, or Low Ripple Burst Mode® Operation at Light Loads
- PLL Synchronization to External Clock
- EXTVCC LDO Powers Chip from VOUT = 3.3V to 40V
- OPTI-LOOP® or Fixed Internal Compensation
- Input and Output Overvoltage Protection
- Thermally Enhanced (5mm × 6mm) QFN Package
Product Details
The LT7101 is a high efficiency, monolithic synchronous step-down DC/DC converter utilizing a constant frequency, average current mode control architecture. It operates from an input voltage range of 4.4V to 105V and provides an adjustable regulated output voltage from 1V to VIN while delivering up to 1A of output current.
The LT7101 features high frequency operation and a low minimum on-time that reduce inductor size and enable constant-frequency operation even at very high stepdown ratios. In addition, the LT7101 achieves the lowest possible dropout voltage with 100% maximum duty cycle operation. During light load operation, converter efficiency and output ripple can be optimized by selecting Burst Mode, pulse-skipping or forced continuous operation.
The LT7101 includes accurate, high speed average current programming and monitoring without the need for an external sense resistor. Additional features include a bypass LDO to maximize efficiency, fixed or adjustable output voltage and loop compensation, and a wide array of protection features to enhance reliability.
Applications
- Battery Chargers and CC/CV Supplies
- Automotive and Military Systems
- Industrial, Avionics and Heavy Equipment
- Medical Instruments and Telecommunication Systems
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
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R526 Reliability Data3/26/2018PDF365 K
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Current Sensing with PMBus Digital Power System Managers—Part 21/1/2022 Analog Dialogue
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.
Models for the following parts are available in LTspice:
LT7101
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.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LT7101EUHE#PBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101EUHE#TRPBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101HUHE#PBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101HUHE#TRPBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101IUHE#PBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101IUHE#TRPBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101MPUHE#PBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| LT7101MPUHE#TRPBF | Material Declaration | Reliability Data | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R526 Reliability Data |
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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.