LM2726 NSC [National Semiconductor], LM2726 Datasheet - Page 5

• Manufacturer Part Number: LM2726
• Description: High Speed Synchronous MOSFET Drivers
• Manufacturer: NSC [National Semiconductor]

BOTTOM DRIVER
t
LOGIC
V
V
V
V
V
I
t
t
V
V
1
leak_EN
on_min
off_min
Electrical Characteristics
LM2726
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: Maximum allowable power dissipation is a function of the maximum junction temperature, T
ambient temperature, T
ambient thermal resistance,
Note 3: ESD machine model susceptibility is 100V.
Note 4: If after a rising edge, a falling edge occurs sooner than the specified value, the IC may intermittently fail to turn on the bottom gate when the top gate is off.
As the falling edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.
Note 5: If after a falling edge, a rising edge occurs sooner than the specified value, the IC may intermittently fail to turn on the top gate when the bottom gate is off.
As the rising edge occurs sooner and sooner, the driver may start to ignore the pulse and produce no output.
VCC = CBOOT = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T
= T
uvlo_up
uvlo_dn
uvlo_hys
IH_EN
IL_EN
IH_PWM
IL_PWM
Symbol
J
= +25˚C. Limits appearing in boldface type apply over the entire operating temperature range.
(Continued)
Pull-down Delay
Power On Threshold
Under-Voltage-Lock-Out
Threshold
Under-Voltage-Lock-Out
Hysteresis
EN Pin High Input
EN Pin Low Input
EN Pin Leakage Current
Minimum Positive Input
Pulse Width
(Note 4)
Minimum Negative Input
Pulse Width
(Note 5)
PWM_IN High Level
Input Voltage
PWM_IN Low Level
Input Voltage
A
. The maximum allowable power dissipation at any ambient temperature is calculated using: P
JA
Parameter
, for LM2725/LM2726 is 172˚C/W. For a T
Condition
Timing Diagram, from
PWM_IN Rising Edge
VCC rises from 0V toward
5V
EN = VCC = 5V
VCC = 5V, EN = 0V
When PWM_IN pin goes
high from 0V
When PWM_IN pin goes
low from 5V
JMAX
of 150˚C and T
5
A
of 25˚C, the maximum allowable power dissipation is 0.7W.
JMAX
Min
, the junction-to-ambient thermal resistance,
2.4
2.4
−2
−2
MAX
Typ
2.8
2.5
0.3
13
55
55
= (T
JMAX
-T
A
) /
Max
0.25
0.25
2
2
JA
. The junction-to-
www.national.com
JA
, and the
Units
µA
A
ns
ns
V
V
V
V
V
V