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參數(shù)資料
| 型號： | LM3544MX-H/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 785K |
| 代理商： | LM3544MX-H/NOPB |
AC Electrical Characteristics
Limits are for T
J = 25C and VIN = 5.0V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
t
r
OUT
x Rise Time (Note 5)
C
L = 33 F, ILOAD = 500 mA
1.5
ms
t
f
OUT
x Fall Time (Note 6)
C
L = 33 F, ILOAD = 500 mA
0.9
ms
t
ON
Turn-on Delay (Note 7)
C
L = 33 F, ILOAD = 500 mA
2.9
ms
t
OFF
Turn-off Delay (Note 8)
C
L = 33 F, ILOAD = 500 mA
0.7
ms
t
F
Flag Delay (Note 9)
I
FLAG =10mA
7
ms
Note 5: Time for OUTx to rise from 10% to 90% of its enabled steady-state value after ENx (ENx) is asserted.
Note 6: Time for OUTx to fall from 10% to 90% of its enabled steady-state value after ENx (ENx) is deasserted.
Note 7: Time between ENx rising through VIH (ENx falling through VIL) and OUTx rising through 90% of its enabled steady-state voltage.
Note 8: Time between ENx falling through VIL (ENx rising through VIH) and OUTx falling through 10% of its enabled steady-state voltage.
Note 9: Time between ENx rising through VIN (ENx falling through VIN) and FLAGX falling through 0.3V when OUTX is connected to GND.
Pin Description
Pin Number
Pin Name
Pin Function
2, 6
IN 1, 2
Supply Inputs: These pins are the inputs to the power switches and the supply
input for the IC. In most applications they are connected together externally
and to a single input voltage supply.
1, 5
GND 1, 2
Grounds: Must be connected together and to a common ground.
15, 14, 11, 10
OUT 1, 2, 3, 4
Switch Outputs: These pins are the outputs of the high side switches.
3, 4, 7, 8
LM3544-H: EN 1, 2, 3, 4
(LM3544-L: EN 1, 2, 3, 4)
Enable (Inputs): Active-high (or active-low) logic enable inputs.
16, 13, 12, 9
FLAG 1, 2, 3, 4
Fault Flag (Outputs): Active-low open drain outputs. Indicates over-current,
UVLO or thermal shutdown. See "Application Information" section for more
details.
LM3544
www.national.com
4
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