LM5018 Texas instruments

LM5018

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LM5018

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Описание

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.

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

Vin (min) (V)	7.5
Vin (max) (V)	100
Vout (min) (V)	1.25
Vout (max) (V)	90
Iout (max) (A)	0.3
Switching frequency (min) (kHz)	50
Switching frequency (max) (kHz)	1000
Features	Synchronous rectification
Operating temperature range (°C)	-40 to 125
Rating	Catalog
Regulated outputs (#)	1
Control mode	Constant on-time (COT)
Duty cycle (max) (%)	90