40V, High-Performance Synchronous

Buck Controller

4 ______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

Note 2: All devices are 100% tested at room temperature and guaranteed by design over the specified temperature range.

9

RT

-7

2

SW

SW

17.3 10

R

f

(1 x 10 )(f

)

×

=

+

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DL Peak Current

= 5.25V

3

A

2

DH, DL Break-Before-Make Time

(Dead Time)

10

ns

SOFT-START

Soft-Start Duration

2048

Switching

Cycles

Reference Voltage Steps

64

Steps

CURRENT LIMIT/HICCUP

Cycle-by-Cycle Valley Current-

Limit Threshold Adjustment

Range

valley limit =

30

mV

300

LIM Reference Current

45

50

55

F

A

LIM Reference Current

Temperature Coefficient

2300

ppm/NC

CSP Input Bias Current

-1

+1

F

A

Number of Consecutive Current-

Limit Events to Hiccup

7

Events

Hiccup Timeout

4096

Switching

Cycles

Peak Low-Side Sink Current-Limit

Threshold

75

mV

POWER-GOOD (PGOOD)

PGOOD Threshold

90

94

97.5

PGOOD Threshold Hysteresis

2.65

PGOOD Output Low Voltage

0.4

V

PGOOD Output Leakage Current

-1

+1

F

A

THERMAL SHUTDOWN

Thermal Shutdown Threshold

Temperature rising

+150

N

C

Thermal Shutdown Hysteresis

20

N

C