|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||

2013-07-0009

PT0317-5

07/31/13

9

PI5PD2041B/51B

70mΩ Current-Limited,

Power-Distribution Switches

Application Information

switch prevents leakage current flow from output to input when chip disabled. The power switch supplies a maximum continuous

current up to 0.5A.

Power-Supply Considerations

Figure 1 Typical Application Circuit

A 0.01μF to 1μF ceramic bypass capacitor between IN and GND, close to the device, is recommended. Placing a high-value

electrolytic capacitor on the output pin(s) is recommended when the output load is heavy. This precaution reduces power-supply

transients that may cause ringing on the input. Additionally, bypassing the output with a 0.01μF to 1μF ceramic capacitor

improves the immunity of the device to short-circuit transients.

Enable (/EN or EN)

The enable pin is logic enable & disables the power switch, which is compatible with CMOS and TTL logic levels. The supply

current is reduced to less than 1μA when a logic high is present on /EN, or when a logic low is present on EN. A logic zero input

on /EN, or a logic high input on EN restores the bias to the driver and control circuits and turns the switch on

/OC Output

The /OC open-drain output is asserted (active low) when an over current or over temperature condition is asserted. The output

remains asserted until the over current or over temperature condition is removed. The /OC pin requires a pull-up resistor, this

resistor should be larger to reduce energy drain. A 100KΩ pull-up resistor works well for most applications. In the case of an

over-current or short-circuit conditions, /OC will be asserted only after response delay time, Td, 14ms have elapsed. If an over

temperature shutdown occurs, the /OC is asserted instantaneously.

Figure 2 Typical Circuit for the /OC Pin

IN

/EN

/OC

GND

OUT

PI5PD2041B

V+

IN

/EN

/OC

GND

OUT

0.1µF

22µF

0.1µF

POWER SUPPLY

2.7V to 5.5V

LOAD

PI5PD2041B