5

SC3303

5

Electrical Characteristics (continued)

Parameter

Conditions

Min

Typ

Max

Units

Gate Drivers

BST Switch On resistance

25

Ω

Internal Power MOSFETs

Inductor Valley Current Limit, VLDO=5V

2.4

3.2

A

LX Leakage Current

VIN=28V, LX=0V, High Side

1

10

μA

Switch Resistance

High Side

215

mΩ

Low Side

110

15

ns

Linear Regulator (The LDO is shorted to the bias node, internally)

LDO Accuracy

-4

4

%V

LDO

LDO Current Limit

Short circuit protection, V

IN

= 12V, V

LDO

<80% of

final V

LDO

value

35

mA

Operating current limit, V

IN

= 12V, V

LDO

> 80% of

final V

LDO

value

100

LDO Drop Out Voltage

From V

IN

to V

LDO

, I

LDO

= 100mA

1.2

V

Note:

(1) Typical value from EVB, not ATE tested.

(2) The minimum inductor valley current limit of 2.4V gives an average output current limit of 3A assuming 1.2A inductor ripple current.