AP4460 datasheet(13/18 Pages) AKM

13 / 18 page

[AP4460]

014012310-E-01

2015/04

- 13 -

10.4 Input/output Current Characteristic

Figure 11. Circuit Example

Internal current consumption of each pin is shown in Figure 12.

Figure 12. The consumption for VD and VS1 pin

・In the case of Start-up:

VD pin current (IVD, inflow into VD pin) is about 2.2uA and VS1 pin current (IVS1, inflow into VS1 pin)

is about 10nA before VVD reaches to VPORH voltage. (In case of VVD < VPORL, F2 switch= ON, the total

internal consumption of VS1 and VS2 pins is 10nA.)

・In the case of DC-DC switching:

After VVD reaches to VPORH, until VVD drops to VPORL, IVD is 5.4uA~1mA depends on switching period

and VVD voltage.

・In the case of DC-DC skip (intermittent action):

After VVD reaches to VTGT, internal current consumption is about 4.7uA. IVS1 consumption is determined

by VS1 pin voltage and internal resistor. (Maximum IVS1 is 500nA when VS1 voltage= 4V) After VVD

reaches to VTGT, until VVD drops to VVDTGT-VVDTGTHYS, switch F1= OFF, the adverse current (from VS1

pin to VD pin) is not occurred. When VVD reaches VPORL, IVD is about 2.2uA and IVS1 is about 10nA.

AP4460 Datasheet(PDF) 13 Page - Asahi Kasei Microsystems