External components

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4

External components

For input and output capacitors, ST recommends using ceramic capacitors with low ESR.

For good stability of device supplied from low input voltage 2.6V at maximum ratings of

output, ST recommends using 1µF/6.3V as a minimum value for the input capacitor and

4.7µF/6.3V as a minimum value for the output capacitor.

Table 2.

Bill of materials

Symbol

Parameter

Type

Qty

Supplier

Value

Unit

Cin

Input Cap.

Ceramic Low ESR

GRM155F50J105ZE01

1

Murata

1

µF

Cbat

Output Cap.

Ceramic Low ESR

GRM188r60J475ke19

1

Murata

4.7

µF

Rusb

Usb Current Set

Thick film type 1% CRG0603J2K0

1

THCO

2

KOhm

Rdc

DC Current Set

Thick film type 1% CRG0603J10K0

1

THCO

10

KOhm

N-Pmos

Nmos-Pmos IC

STS7C4F30

1

ST

D1

SCHOTTKY

STPS1L40M

1

ST

Rled

Limit Led Current

Thick film type 1% CRG0603J1K0

2

THCO

1

KOhm

Rpull

Pull down resistor

Thick film type 1% CRG0603J1K0

1

THCO

1

KOhm

Rf

Resistance Filter

Thick film type 1% CRG0603J20K0

1

THCO

20

KOhm

Cf

Capacitor Filter

Ceramic Low ESR

GRM188r71e104ka01

1

Murata

100

nF

Led Power

Led

1.8mm-RED LED

L-2060ID

1

KINGBRIGHT

Led Charge

Led

1.8mm-GREEN LED L-2060GD

1

KINGBRIGHT

USB In

Connector USB

Mini B

54819-0572

1Molex