sales@hkmjd.com
Service Telephone:86-755-83294757
Trade Name:Switch Controller
Brand:TI
Particular Year:23+
Package:HTSSOP-20
Delivery Date:New and Original
Stock: 15000pcs
The LM5118MHX is a wide input voltage range buck/boost switching regulator controller that provides all the features required to achieve high performance and cost-effective buck/boost regulators with minimal external components. The buck/boost topology maintains a stable output voltage when the input voltage is lower or higher than the output voltage, making this device ideal for automotive applications. When the input voltage is sufficiently greater than the regulated output voltage, the LM5118MHX operates as a buck regulator, then gradually transitions to the corresponding buck/boost mode as the input voltage approaches the output voltage. This dual-mode approach maintains regulation over a wide input voltage range, provides optimal conversion efficiency in buck mode, and ensures interference-free output during mode transitions. The controller is easy to use and includes drivers for both high-side buck MOSFETs and low-side boost MOSFETs. This regulator control method is based on current-mode control using simulated current slopes. Simulated current-mode control reduces the noise sensitivity of the pulse-width modulation circuit, enabling reliable control of extremely low duty cycles required in high-input-voltage applications. Additional protection features include current limiting, thermal shutdown, and enable input. The LM5118MHX is available in a power-enhanced 20-pin HTSSOP package with exposed chip connection pads for improved thermal performance.
LM5118MHX Features
• Ultra-wide input voltage range from 3V to 75V
• Simulated peak current-mode control
• Smooth transition between buck and boost modes
• Switching frequency programmable up to 500kHz
• Oscillator synchronisation functionality
• Internal high-voltage bias regulator
• Integrated high-side and low-side gate drivers
• Programmable soft-start time
• Ultra-low shutdown current
• Enable input wide-bandwidth error amplifier
• 1.5% feedback reference accuracy
• Thermal shutdown
• Package: 20-pin HTSSOP (exposed pad)
• Combine with LM5118 and WEBENCH® Power Designer to create custom designs
LM5118MHX Parameters
Input voltage range: 3V to 75V
Output voltage range: 1.23V to 70V (adjustable)
Output current: 3.5A (maximum)
Switching frequency: 50kHz to 500kHz (programmable)
Duty cycle: Maximum 80% (buck mode)
Package: 20-HTSSOP (with heat sink pad)
Operating temperature: -40°C to +125°C
Quiescent current: 4.5mA (typical)
LM5118MHX Applications
Industrial buck/boost power supplies
Model
Brand
Package
Quantity
Describe
ADI
MSOP-10
3000
Wide input range, No RSENSE™ Wide input range, positive to negative DC/DC controller
ADI
38-TFSOP
2000
Bidirectional Synchronous Buck/Boost Controller with Reverse Supply, Reverse Current
ADI
38-TFSOP
2000
Bidirectional Synchronous Buck/Boost Controller with Reverse Supply, Reverse Current
ADI
38-TFSOP
2000
Bidirectional Synchronous Buck/Boost Controller with Reverse Supply, Reverse Current
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