SC418

6

Electrical Characteristics (continued)

Parameter

Conditions

Min

Typ

Max

Units

High-Side Driver (DH, BST, LX)

VDDP = 5V

2.0

A

On Resistance

R

3.0

6.0

Ω

R

1.0

2.0

Ω

R

0.6

1.2

Ω

C

22

ns

C

12

ns

From FB Comparator Input to DH

30

45

60

ns

10

20

30

ns

Bootstrap Switch Resistance

10

Ω

Low-Side Driver (DL, VDDP, PGND)

VDDP = 5V

4.0

A

On Resistance

R

1.3

2.1

Ω

R

0.50

0.86

Ω

C

7

ns

C

3.5

ns

Notes:

(1) VIN UVLO is programmable using a resistor divider from VIN to ENL to AGND. The ENL voltage is compared to an internal reference.

(2) Guaranteed by design.

(3) For VDDA less than 4.5V, the On-Time may be limited by the VDDA supply voltage and by V

Voltage section in the Applications Information.

(4) The Zero Cross Detector and the Power-Save and Ultrasonic Power-Save features are not supported for VDDA less than 4.5V.

(5) The ENL pin will enable the LDO with 1.0V typical. The ENL pin’s VIN ULVO function will disable the switcher unless the ENL pin exceeds the

V

(6) The switch-over threshold is the maximum voltage differential between the VLDO and VOUT pins which ensures that VLDO will internally

switch-over to VOUT. The non-switch-over threshold is the minimum voltage differential between the VLDO and VOUT pins which ensures

that VLDO will not switch-over to VOUT.

(7) The LDO drop out voltage is the voltage at which the LDO output drops 2% below the nominal regulation point.