LM34927 Texas instruments

LM34927

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LM34927

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Описание

The LM34927 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The Constant on-time (COT) control scheme employed in the LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.

Wide 7.5-V to 100-V Input Range
Integrated 600-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 (UVLO)
Remote Shutdown
Thermal Shutdown
Packages:
- 8-pin WSON
- 8-pin SO PowerPAD™

Device type	Converters
Topology	Flybuck
Vin (min) (V)	9
Vin (max) (V)	100
Vout (min) (V)	1.225
Vout (max) (V)	90
Iout (max) (A)	0.6
Features	Enable, UVLO adjustable
Operating temperature range (°C)	-40 to 125
Regulated outputs (#)	1
Control mode	Constant on-time (COT)
Rating	Catalog