TelCom Semiconductor Debuts New TC1682-84, TC2682-84 and TC3682-84 Voltage Doublers
TelCom Semiconductor Inc. (Mountain View, CA) announced nine new inverting charge-pump voltage doublers, the TC1682 through TC1684, the TC2682 through TC2684 and the TC3682 through TC3684. These CMOS charge-pump converters provide an inverted doubled output from a single positive supply and have 99-percent voltage-conversion efficiency, a wide operating range (1.8V to 5.5V), a low active supply current, and a low output resistance (120 ohms typical). These devices also save board space by requiring only three external capacitors and are offered in small eight-pin MSOP packages.
Both the TC1682-84 and TC3682-84 family of doublers feature a power-saving shutdown mode that provides a low-power mode of operation by consuming less than 1uA of supply current. The TC2682-84 family provides an economic solution for systems requiring a constant negative dc bias that cannot afford to shutdown for critical system operation. Each device of the three sets (TC1682-84, TC2682-84 and TC3682-84) contains an onboard oscillator that synchronously controls the operation of the charge-pump switching matrices. Each family of products offers three different oscillator frequencies, allowing designers to trade-off supply current versus external capacitor size.
The TC1682-84, TC2682-84 and TC3682-84 are packaged in space-saving eight-pin MSOP packages and are devised for applications requiring minimal external component count and small physical size. Pricing for the TC1682-84 starts at $0.99, $0.88 for the TC2682-84 and $1.09 for the TC3682-84 in 10,000-piece units.
