Switching Characteristics

Specifications in standard typeface are for T

perature range. Unless otherwise specified, V

Symbol

Parameter

Conditions

Min

Typ

Max

Units

LM5109A

t

LPHL

Lower Turn-Off Propagation Delay (LI

Falling to LO Falling)

30

56

ns

t

HPHL

Upper Turn-Off Propagation Delay (HI

Falling to HO Falling)

30

56

ns

t

LPLH

Lower Turn-On Propagation Delay (LI

Rising to LO Rising)

32

56

ns

t

HPLH

Upper Turn-On Propagation Delay (HI

Rising to HO Rising)

32

56

ns

t

MON

Delay Matching: Lower Turn-On and

Upper Turn-Off

2

15

ns

t

MOFF

Delay Matching: Lower Turn-Off and

Upper Turn-On

2

15

ns

t

Either Output Rise/Fall Time

C

15

-

ns

t

PW

Minimum Input Pulse Width that

Changes the Output

50

ns

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of

the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the

Electrical Characteristics tables.

Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor into each pin.

Note 3: 4 layer board with Cu finished thickness 1.5/1/1/1.5 oz. Maximum die size used. 5x body length of Cu trace on PCB top. 50 x 50mm ground and power

planes embedded in PCB. See Application Note AN-1187.

Note 4: Min and Max limits are 100% production tested at 25˚C. Limits over the operating temperature range are guaranteed through correlation using Statistical

Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).

Note 5: The

Note 6: In the application the HS node is clamped by the body diode of the external lower N-MOSFET, therefore the HS voltage will generally not exceed -1V.

However in some applications, board resistance and inductance may result in the HS node exceeding this stated voltage transiently.

exceed -5V.

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