7.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator
Product details
Parameters
Package | Pins | Size
Features
- Wide 7.5- to 100-V Input Range
- Integrated 300-mA High-Side and
Low-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
- Create a Custom Design Using the LM5018 With the WEBENCH® Power Designer
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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.
The LM5018 device is available in WSON-8 and SO PowerPAD-8 plastic packages.
Technical documentation
= Top documentation for this product selected by TI
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
BOOSTXL-3PHGANINV
Description
The BOOSTXL-3PHGANINV evaluation module features a 48-V/10-A three-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives.
Features
- Wide Input Voltage Range 12-V to 60-V Three Phase GaN Inverter with 7-ARMS Output Current per Phase
- High Accuracy Phase Current Sensing Over Temperature Range From –25°C to 85°C
- Precision In-Line Phase Current Sensing
- TI BoosterPack Compatible Interface
Get started
- See the Get Started sections of (...)
Description
The LM5018 evaluation board provides the design engineer with a fully functional buck regulator, employing the constant on-time (COT) operating principle. This evaluation board provides a 10V output over an input range of 12.5V to 100V.
Features
- Input Voltage Range: 12V to 100V
- Output Voltage: 10V
- Output Current 300 mA
- Nominal Switching Frequency ~ 440 kHz
- Measured Efficiency: 88.4% at 300 mA and VIN = 24V
- Board Size 5.5 cm x 4.5 cm
LM5018ISOEVAL
Description
An isolated bias supply is implemented in this evaluation board with the LM5018 Constant-On-Time (COT) regulator. The LM5018 regulator integrates both the high and low side power switches essential for creating an isolated buck converter.
Features
- Input Voltage Range: 20V to 100V
- Primary Output Voltage: 10V
- Secondary (Isolated) Output Voltage: 9.5V
- Maximum Load Current: 300 mA
- Maximum Power Output: 1W
- Nominal Switching Frequency 750 kHz (FIN = 24V, IOUT2 = 100 mA)
- 70% Board Size 2 inch x 2 inch
Design tools & simulation
SNVM044A.ZIP (40 KB) - PSpice Model
SNVMAM2A.ZIP (2 KB) - PSpice Model
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
FLYBUCK-FLYBACK-DESIGN-CALC — This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
Features
- Features isolated topologies like Fly-Buck™, Fly-Buck-Boost, DCM and CCM Flyback
- Capability to design up to 6 isolated outputs
- Recommends ICs for desired application design
- Incorporates loop compensation in designs
- Compares efficiency, external component count and transformer currents for every topology (...)
LM5018QUICK-CALC — LM5018 Quick Start Calculator is an easy to use excel based design tool for LM5018 based buck converter design. The design tool has all the design equations embedded and an example default design. The user can modify the design input parameters such as the input voltage range, output voltage, load (...)
SNVC055.ZIP (228 KB)
Reference designs
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SO PowerPAD (DDA) | 8 | View options |
| WSON (NGU) | 8 | View options |
Ordering & quality
Support & training
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