APPLICATION SUPPORT

Please contact local distributor or H&M SEMI sales representatives for technical support.

PCB GUIDELINES

0

0.5

1

1.5

0

1

2

3

4

5

6

Iout (A)

Boost Output Voltage Vs. Output Current

Vin=3.3V

Vin=3.6V

Vin=4V

0

0.5

1

1.5

80%

85%

90%

95%

100%

Iout (A)

Boost Efficiency Vs. Output Current

Vin=3.3V

Vin=3.6V

Vin=4V

Vout=5V

Cout,

Output capacitor, next to IC pins

Cin,

Input capacitor,

Next to IC pins

L,

Inductor,

Next to IC pins

GND

BAT

USB V+

To drive LEDs

PCB wire

PCB Solder

Device

Please have the power devices

placed just next to the IC pins

so that the power traces are

kept the shortest way to

achieve a good performance of

HM5909.

HM5909