Maxim Offers Single-Channel, Step-Up DC-DC Converters With Integrated FETJune 17, 2008 by Jeff Shepard
Maxim Integrated Products introduced the MAX17062/MAX17067 single-channel, step-up dc-dc converters with an integrated FET. Designed on Maxim’s proprietary BiCMOS process, these devices are said to provide high current density, increased voltage capacity, and improved efficiency for advanced LCD applications.
The MAX17062/MAX17067 employ current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in, n-channel power MOSFET. The current-mode architecture provides fast transient response to dynamic loads, and the high-voltage internal MOSFET can generate output voltages up to 20V from an input of 2.6 to 5.5V. The boost converters are suitable for LCD-panel TV, notebook, and monitor applications.
The MAX17067 also incorporates what is described as a unique input-clamping circuit to help protect the device’s internal control circuitry from the input-voltage transients that can be found in many LCD production facilities. With an external resistor, the MAX17067’s internal clamping circuit reduces current to the input during a high-input-voltage transient condition. This feature is said to eliminate the cost of external clamping circuitry, or the use of products with input-voltage ratings higher than required for normal operation.
The MAX17062 is available in a small (3 x 3mm), low-profile (0.8mm), 10-pin TDFN package, and the MAX17067 is available in a small, 8-pin µMAX® package. Both devices are fully specified over the -40 to +85°C extended temperature range. Prices start at $2.94 (1000-up, FOB USA).