LR8425 datasheet(2/7 Pages) LRC

2 / 7 page

ORDER INFORMATION

Device No.

Output Voltage

Package

Packaging

8425AQD10

Adjustable

QFN2.1x2.1-10

3000 parts per reel

8425BQD10

Adjustable

QFN2.1x2.1-10

3000 parts per reel

PIN CONFIGURATION:

Top View

(QFN2.1X2.1-10)

TYPE

(1)

DESCRIPTION

NO.

NAM E

Chip Enable Input. Internal integrated with 1Mohm pull down resistor.

CE=High: Normal free running operation.

CE=Low:

Shutdown; quiescent current <1μA. Output capacitor can be

completely discharged through the load or feedback resistors.

If CE is undefined, pin SW may ring.

LBI

Low Battery Comparator Input (comparator enabled with CE).

VIN

Battery Supply Input Voltage. The device gets its start-up bias from VIN.

Once AVOUT exceeds 2.3V, bias comes from AVOUT. Thus, once started,

operation is completely independent from VIN. Operation is only limited by

the output power level and the battery’s internal series resistance. The V

pin should be connected to the positive terminal of the battery and

bypassed with a low ESR ceramic bypass capacitor. Care should be taken

to minimize the loop area formed by the bypass capacitor connections,

the VIN pin, and the

8425 AGND pin. The minimum recommended

bypass capacitance is 1

μF ceramic with a X5R or X7R dielectric and the

optimum placement is closest to the VIN pin and the AGND pin.

PCB trace length from VIN to the input filter capacitor(s) should be as short

and wide as possible.

LESHAN RADIO COMPANY, LTD.

Ver0.5

LR8425 Arkusz danych(PDF) 2 Page - Leshan Radio Company

LR8425 Arkusz danych(HTML) 2 Page - Leshan Radio Company

Html Pages

1 2 3 4 5 6 7

Arkusz danych Pobierz

Link URL