參數(shù)資料
型號(hào)： LM2622-ADJMWC
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 2.3 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, UUC
封裝： WAFER
文件頁(yè)數(shù)： 14/19頁(yè)
文件大?。?/td> 478K
代理商： LM2622-ADJMWC
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN
12V
SW Voltage
18V
FB Voltage
7V
V
C Voltage
7V
SHDN Voltage
7V
FSLCT
12V
Maximum Junction
Temperature
150C
Internally Limited
Lead Temperature
300C
Vapor Phase (60 sec.)
215C
Infrared (15 sec.)
220C
ESD Susceptibility
Human Body Model
2kV
Machine Model
200V
Operating Conditions
Operating Junction
Temperature Range (Note 4)
40C to +125C
Storage Temperature
65C to +150C
Supply Voltage
2V to 12V
Electrical Characteristics
Specifications in standard type face are for T
J = 25C and those with boldface type apply over the full Operating Tempera-
ture Range (T
J = 40C to +125C)Unless otherwise specified. VIN =2.0V and IL = 0A, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
I
Q
Quiescent Current
FB = 0V (Not Switching)
1.3
2.0
mA
V
SHDN =0V
5
10
A
V
FB
Feedback Voltage
1.2285
1.26
1.2915
V
I
Switch Current Limit
V
IN = 2.7V (Note 7)
1.0
1.65
2.3
A
V
O/ILOAD
Load Regulation
V
IN = 3.3V
6.7
mV/A
%V
FB/VIN
Feedback Voltage Line
Regulation
2.0V
≤ V
IN ≤ 12.0V
0.013
0.1
%/V
I
B
FB Pin Bias Current (Note 8)
0.5
20
nA
V
IN
Input Voltage Range
212
V
g
m
Error Amp Transconductance
I = 5A
40
135
290
mho
A
V
Error Amp Voltage Gain
135
V/V
D
MAX
Maximum Duty Cycle
78
85
%
f
S
Switching Frequency
FSLCT = Ground
480
600
720
kHz
FSLCT = V
IN
1
1.25
1.5
MHz
I
SHDN
Shutdown Pin Current
V
SHDN =VIN
0.01
0.1
A
V
SHDN =0V
0.5
-1
I
L
Switch Leakage Current
V
SW = 18V
0.01
3
A
R
DSON
Switch R
DSON
V
IN = 2.7V, ISW = 1A
0.2
0.4
Th
SHDN
SHDN Threshold
Output High
0.9
0.6
V
Output Low
0.6
0.3
V
UVP
On Threshold
1.8
1.92
2.0
V
Off Threshold
1.7
1.82
1.9
V
θ
JA
Thermal Resistance
Junction to Ambient(Note 9)
235
C/W
Junction to Ambient(Note 10)
225
Junction to Ambient(Note 11)
220
Junction to Ambient(Note 12)
200
Junction to Ambient(Note 13)
195
Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to
be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(MAX), the junction-to-ambient thermal resistance, θJA,
and the ambient temperature, TA. See the Electrical Characteristics table for the thermal resistance of various layouts. The maximum allowable power dissipation
at any ambient temperature is calculated using: PD (MAX) = (TJ(MAX) TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die
temperature, and the regulator will go into thermal shutdown.
LM2622
www.national.com
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