Shengbang Microelectronics launched a new product SGM3111, a 33V output buck-boost charge pump DC DC converter. The device can be used in 2-3 AA batteries or single-cell lithium battery devices and is used as a power supply for IO, cameras, audio, PC cards, promiscuous logic circuits, and more in a variety of portable products.
The SGM3111 is a buck-boost charge pump DC DC converter that can be used in 18v to 5Provides a stable 5 over the input supply voltage range of 33V output voltage, drive current capability 150mA. The input voltage is less than 3At 3V, it operates at a constant frequency of 1Constant pressure output mode with 2 times charge pump at 2MHz. When the input voltage is higher than the output voltage, the chip enters the low-dropout linear regulator LDO buck mode. The SGM3111's soft-start circuit limits the inrush current at start-up. The current-limiting circuit and thermal shutdown allow the device to accept a continuous short circuit from the output to ground. Low operating current (60 A, typ) and ultra-low shutdown current (< 06 a) Make the device more power-efficient. The SGM3111 features TDFN-2 2-6FL in line with the environmental conceptGreenEncapsulation.
Figure 1 Functional block diagram of the SGM3111.
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Power management ICs