LV5256GP

No.A1277-8/9

Continued from preceding page.

Pin No.

Pin Name

Description

Equivalent Circuit

18

RT

Oscillation frequency setting pin. Connect a resistor

between this pin and GND. A 100k

Ω resistor causes the

oscillator to oscillate at 1MHz (typ.).

18

VDD

10k

Ω

500

Ω

19

VDD

Logic system power supply. Apply 3.0V

±0.1V to this pin

from an external source.

20

LGND

Logic system ground pin. All voltages are measured with

respect to this voltage level.

Startup Sequence

ONOFF

VIN

REG_O

VOUT-5

SS

SW

ONOFF:H

REG_O startup

UVLO release

VOUT-5 startup

VOUT-5 normal judgment

SS start

Power supply operation beginning

VDD

* Be sure to set the ONOFF to 0V when starts or stops VDD. And apply voltage to VIN after VDD started up.