Linear Technology Corp. (LTC, Milpitas, CA) debuted its new H-Grade version of the LT1936, which is a 36 V, current-mode, pulse-width modulated (PWM), step-down dc-dc converter with an internal 1.9 A power switch, packaged in an eight-lead, thermally enhanced MSOP package. The H Grade version operates up to a junction temperature of 150 °C, compared to the E Grade and I Grade versions' 125 °C maximum junction temperature. The H Grade parts are both tested and guaranteed to the maximum junction temperature of 150 °C, and are suitable for automotive and industrial applications that are subject to high ambient temperatures.
The LT1936's wide input range of 3.6 V to 36 V makes it suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24 V industrial supplies, and automotive batteries. For automotive applications, the LT1936 can easily operate with sub 4 V inputs, necessary for automotive cold-crank requirements. Its 500 kHz operating frequency allows the use of tiny, low-cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The LT1936HMS8E is available from stock in a thermally enhanced, MSOP-10 package. Pricing starts at $3.67 each for 1,000-piece quantities.
