The power demands on the battery in a cell phone and other portable devices are growing daily. As designers add features and seek higher data rates, power management is mandatory. If you want your entire power-management solution in one small chip, the Dialog Semiconductor DA9052 may be for you. This programmable power-management IC provides everything you need to power the circuits in a smart phone or other mobile consumer devices (Fig. 1).

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The DA9052 comprises four buck dc-dc converters with a 0.5- to 3.6-V range, 10 programmable LDO regulators, a low-power backup charger, a high-voltage white LED driver, a 32-kHz RTC oscillator, and a general-purpose ADCa with touchscreen interface. It also features a 16-bit GPIO bus, dual serial control interfaces, and OTP memory.

The individual supplies can be connected in a variety of ways to get just the voltages you need. The LDOs can be connected to the dc-dc converters to improve system efficiency. Each output can be connected in series or parallel, adding further flexibility. Dynamic voltage scaling can be used on up to five outputs. Dialog’s SmartMirror dynamic biasing is implemented on all linear regulators.

The on-chip dual-input switching dc/USB battery charger allows up to 1.2 A to be drawn from a lithium battery with minimal thermal impact to the chip. The USB power inputs are overvoltage protected. The embedded power-path controller manages energy flow between an ac adapter, USB cable, and battery.

A cool feature is the programmability. With such flexibility, you can tailor the design and system function in different operating modes to eliminate power consumption overhead in the host processor. With the Power Commander software utility, you can program the turn-on/turn-off times of all supplies (Fig. 2). Multiple sleep modes can also be selected.

Samples of the DA9052 are available now. Pricing is from $3.80 in 1000-unit quantities.

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