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參數(shù)資料
| 型號： | LM2651MTC-3.3 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Isolated Flyback Switching Regulator with 9V Output |
| 中文描述： | 2.6 A SWITCHING REGULATOR, 345 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | TSSOP-16 |
| 文件頁數(shù)： | 5/10頁 |
| 文件大?。?/td> | 222K |
| 代理商： | LM2651MTC-3.3 |
All Output Voltage Versions
(Continued)
Specifications in standard type face are for T
= 25C and those with
boldface type
apply over
full operating junction tem-
perature range.
V
IN
=10V unless otherwise specified.
Symbol
Parameter
Conditions
I
EA_SOURCE
Error Amplifier Source
Current
I
EA_SINK
Error Amplifier Sink Current
Typical
40
Limit
Units
μA
μA(min)
μA
μA(min)
V
V(min)
V
V(max)
V
kHz
kHz(min)
kHz(max)
%
%(min)
μA
μA(min)
μA(max)
μA
μA(min)
μA(max)
V
V(min)
V(max)
25/
15
65
30
V
EAH
Error Amplifier Output Swing
Upper Limit
Error Amplifier Output Swing
Lower Limit
Body Diode Voltage
Oscillator Frequency
2.70
2.50/
2.40
V
EAL
1.25
1.35/
1.50
V
D
f
OSC
I
DIODE
= 1.5A
V
IN
= 4V
1
300
280/
255
330/
345
D
MAX
Maximum Duty Cycle
V
IN
= 4V
95
92
I
SS
Soft-Start Current
Voltage at the SS pin = 1.4V
11
7
14
I
SHUTDOWN
Shutdown Pin Current
Shutdown Pin Pulled Low
2.2
0.8/
0.5
3.7/
4.0
v
SHUTDOWN
Shutdown Pin Threshold
Voltage
Falling Edge
0.6
0.3
0.9
T
SD
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis Temperature
165
C
T
SD_HYST
25
C
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions for which the device is in-
tended to be functional, but device parameter specifications may not be guaranteed under these conditions. For guaranteed specifications and test conditions, see
the Electrical Characteristics.
Note 2:
The maximum allowable power dissipation is calculated by using P
Dmax
= (T
Jmax
T
A
)/
θ
JA
, where T
Jmax
is the maximum junction temperature, T
A
is the
ambient temperature, and
θ
JA
is the junction-to-ambient thermal resistance of the specified package. The 893 mW rating results from using 150C, 25C, and
140C/W for T
Jmax
, T
A
, and
θ
JA
respectively. A
θ
JA
of 140C/W represents the worst-case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking
allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 7.14mW per C above 25C ambient. The LM2651 actively
limits its junction temperature to about 165C.
Note 3:
The human body model is a 100pF capacitor discharged through a 1.5k
resistor into each pin.
Note 4:
Typical numbers are at 25C and represent the most likely norm.
Note 5:
All limits are guaranteed at room temperature (standard typeface) and at
temperature extremes (boldface type )
. All room temperature limits are 100%
production tested. All limits at
temperature extremes
are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to
calculate Average Outgoing Quality Level (AOQL).
L
www.national.com
5
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