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2022-09-24 23:33:15
TPS60140PWPR - Analog IC
The TPS6014x boost, regulated charge pumps generate a 5 V voltage for a 1.8 V ±4% output voltage over a 3.6 V input voltage range. These devices are typically powered by two alkaline, NiCd or NiMH batteries and provide an output current of a minimum of 100 mA from a 2 V input. Only four require an external capacitor to create a full voltage tripler charge pump. The device uses an output conditioning pulse-skipping topology. The controller optimizes for the lowest output voltage ripple over the entire output current range. Peak output current and therefore output voltage ripple are greatly reduced compared to traditional pulse-skipping topologies by adjusting the output resistance of the charge pump. The maximum output resistance at light loads is limited to ensure low quiescent current. The TPS60140 includes a low battery compare that warns if the battery voltage falls below a user-adjustable threshold voltage. The TPS60141 has a power good output that becomes active when the output voltage reaches 90% of its nominal value. A logic shutdown function disables the converter, reducing the output to 1 mA and the maximum supply current is disconnected from the input. Special current control circuit prevents excessive current from being drawn from the battery during startup. This DC-DC converter requires no inductors, so EMI is less of a concern. This is a small, thermally enhanced 20-pin TSSOP package (Works).