lm27222sd National Semiconductor Corporation, lm27222sd Datasheet - Page 5

• Manufacturer Part Number: lm27222sd
• Description: High-speed 4.5a Synchronous Mosfet Driver
• Manufacturer: National Semiconductor Corporation

LOGIC
Electrical Characteristics
VCC = CB = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T
+25˚C. Limits appearing in boldface type apply over the entire operating temperature range (-40˚C ≤ T
Symbol
I
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating ratings are conditions under which the device operates
correctly. Operating Ratings do not imply guaranteed performance limits.
Note 2: The SW pin can have -2V to -0.5 volts applied for a maximum duty cycle of 10% with a maximum period of 1 second. There is no duty cycle or maximum
period limitation for a SW pin voltage range of -0.5V to 30 Volts.
Note 3: Maximum allowable power dissipation is a function of the maximum junction temperature, T
ambient temperature, T
ambient thermal resistance, θ
θ
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).
Timing Diagram
V
V
leak_LEN
JA
V
V
IH_LEN
IL_LEN
IH_IN
IL_IN
for the LM27222SD is 42˚C/W. For a T
LEN pin Leakage Current
LEN Low to High Threshold
LEN High to Low Threshold
IN Low to High Threshold
IN High to Low Threshold
Threshold Hysteresis
A
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
Parameter
JA
, for the LM27222M, it is 165˚C/W. For a T
JMAX
of 150˚C and TA of 25˚C, the maximum allowable power dissipation is 3W.
(Note 4) (Continued)
LEN = 0V, Source Current
LEN = 5V, Sink Current
Low to High Transition
High to Low Transition
Low to High Transition
High to Low Transition
Conditions
JMAX
of 150˚C and T
5
A
of 25˚C, the maximum allowable power dissipation is 0.76W. The
JMAX
, the junction-to-ambient thermal resistance, θ
Min
30
30
MAX
Typ
200
0.7
33
= (T
JMAX
J
≤ 125˚C).
-T
A
Max
) / θ
65
65
JA
20117904
. The junction-to-
www.national.com
A
% of V
% of V
% of V
% of V
JA
= T
Units
, and the
nA
µA
V
J
=
CC
CC
CC
CC