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Texas Instruments LM5018 | Demoboard TIDA-00913
7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator
Overview
| Topology | Buck Converter |
| Input voltage | 7.5-100 V |
| Switching frequency | 1000 kHz |
| Output 1 | 1.23 V / 0.3 A |
| IC revision | E1 |
Description
The LM5018 is a 100-V, 300-mA synchronous step-down regulator with integrated high-side and low-side MOSFETs. The constant-on-time (COT) control scheme employed in the LM5018 device requires no loop compensation, provides excellent transient response, and enables very low step-down ratios. The on-time varies inversely with the input voltage resulting in nearly constant frequency over the input voltage range. A high-voltage startup regulator provides bias power for internal operation of the IC and for integrated gate drivers.A peak current limit circuit protects against overload conditions. The undervoltage lockout (UVLO) circuit allows the input undervoltage threshold and hysteresis to be independently programmed. Other protection features include thermal shutdown and bias supply undervoltage lockout.
Features
- Wide 7.5- to 100-V Input Range
- Integrated 300-mA High-Side andLow-Side Switches
- No Schottky Required
- Constant On-time Control
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Nearly Constant Operating Frequency
- Intelligent Peak Current Limit
- Adjustable Output Voltage From 1.225 V
- Precision 2% Feedback Reference
- Frequency Adjustable to 1 MHz
- Adjustable Undervoltage Lockout
- Remote Shutdown
- Thermal Shutdown
- Packages:
- WSON-8
- SO PowerPAD™-8
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | L(µH) | ISAT,10%(A) | ISAT,30%(A) | IR,40K(A) | IRP,40K(A) | RDC max.(mΩ) | fres(MHz) | Size | Version | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green | Downloads27 files RAY files
| Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | Dominant Wavelength [typ.]525 nm | Emitting ColorGreen | Peak Wavelength [typ.]515 nm | Luminous Intensity [typ.]430 mcd | Forward Voltage [typ.]3.2 V | Chip TechnologyInGaN | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | – | – | – | – | Size0603 | – | – | – | – | – | – | |||
 | WE-PD SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PD SMT Power Inductor | – | – | – | – | – | – | – | Inductance470 µH | Saturation Current @ 10%1.5 A | Saturation Current @ 30%1.85 A | Rated Current1.4 A | Performance Rated Current1.45 A | DC Resistance560 mΩ | Self Resonant Frequency1.8 MHz | Size1210 | VersionStandard | Pins2 | – | – | – | – | ||||
 | WR-TBL Series 352 - 5.08 mm Horizontal with Hook on Wire Side, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Pins2 | PCB/Cable/PanelCable | ModularityNo | TypeHorizontal | Wire Section 12 to 24 (AWG) 3.31 to 0.205 (mm²) |