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LM2725MX Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM2725MX
Descripción Electrónicos  High Speed Synchronous MOSFET Drivers
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2725MX Datasheet(HTML) 5 Page - National Semiconductor (TI)

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


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