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Low-dropout regulators convert input to low-voltage output

Malvern, Pa. — Vishay Intertechnology, Inc. claims these dual-output, low-dropout (LDO) regulators with 48-microamp ground current can convert 2.25- to 5.5-volt inputs to outputs that are as low as 1.5 V, at 150 milliamp and 300 mA current levels.

Vishay's SiP2210, SiP2211, SiP2213, and SiP2214 LDO regulators are intended for portable applications like cell phones, PDAs, MP3 players, and wireless modems.

Each LDO regulator is available in a choice of two lead-free packages: 3 x 3 mm MLP33-10 PowerPAK package with a fixed output, or a MLP44-16 PowerPAK package with an adjustable output. All four devices are capable of supplying 150 mA from output one, and 300 mA from output two.

The SiP2210 and SiP2211 are said to be pin-for-pin replacements for Micrel's MIC2210 and MIC2211, and are rated for a low dropout voltage of 65 mV at 100 mA and low ground current. Both feature independently enabled outputs, and the SiP2210 also includes an additional open-drain driver output capable of sinking 150 mA, as well as integrated power-on reset (POR) protection.

The SiP2213 and SiP2214 are said to be pin-for-pin replacements for Micrel's MIC2213 and MIC2214.

In the SiP2213, the outputs are sequenced at power on, with output one settling before output two begins turning on. Both devices also feature an open-drain driver output capable of sinking 150 mA, as well as POR protection with an adjustable delay that can be set to alert the processor when the output of the regulator has reached and settled at its designated voltage.

In addition to low dropout values and low power consumption, the regulators offer extremely low noise of 30 microvolts, with the addition of a bypass capacitor, according to Vishay. Protection features include undervoltage lockout, output-current limiting, and thermal shutdown.

 
 
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Vishay's SiP2210/11/13/14 are available now. Pricing starts at 70 cents each in 10,000-piece quantities. Click here for the SiP2210 data sheet. Click here for the SiP2211 data sheet. Click here for the SiP2213 data sheet. Click here for the SiP2214 data sheet.

Vishay , 1-619-336-0860, www.Vishay.com.

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