MP5090 Rev. 1.0

www.MonolithicPower.com

11

5/18/2017

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APPLICATION INFORMATION

Selecting the VCC Capacitor

VCC is an internal load switch supply voltage to

the control circuitry. Use low ESR capacitors for

the best performance. Ceramic capacitors with

X5R

or

X7R

dielectrics

are

highly

recommended because of their low ESR and

small

temperature

coefficients.

For

most

applications, a 1µF capacitor is sufficient.

Selecting the Input and Output Capacitor

The input capacitor is very important for

protecting the part from input voltage spikes

ceramic capacitors with X5R or X7R dielectrics

are highly recommended because of their low

ESR and small temperature coefficients. For

most applications, a 10µF 0805 input capacitor

and a 1µF 0603 output capacitor are sufficient

for each channel. For high output voltage

applications, a 22µF input capacitor for each

channel is recommended.

Reverse Current Block Usage

The dual-channel load switch can be combined

into a single-channel load switch with a reverse

current block function (see Figure 2). IN1 is the

input port, and IN2 is the output port. When

EN1 = EN2 = high, the internal MOSFET is on.

When EN1 = EN2 = low, the internal MOSFET

is off, and the body diode blocks the reverse

current.

Figure 2: Reverse Current Block Usage

Parallel Channel Usage

The MP5090 can be parallel-connected to

achieve a 6A single-load switch for the

MP5090GQHT. The CSP package, MP5090GC,

can achieve 4A (see Figure 3). In this parallel

connection, IN1 is connected to IN2 externally,

and OUT1 is connected to OUT2 externally.

EN

VOUT=VIN

GND

On

Off

VCC

1.85V-5.5V

EN1

IN1

EN2

IN2

VCC

GND

OUT1

OUT2

VIN

0.5V-5.5V

Figure 3: Parallel Channel Usage