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参数资料
| 型号： | LM2686MTCX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 180 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | TSSOP-14 |
| 文件页数： | 3/8页 |
| 文件大小： | 243K |
| 代理商： | LM2686MTCX/NOPB |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V
IN to GND)
6.8V
SD, CE
(GND 0.3V) to
(V
In + 0.3V)
V
05 Continuous Output Current
80mA
V
05 Short-Circuit Duration to GND
Indefinite
Continuous Power Dissipation (T
A =
25C) (Note 3)
600mW
T
JMAX (Note 3)
150C
θ
JA (Note 3)
140C/W
Operating Ambient Temp. Range
40C to 85C
Operating Junction Temperature
Range
40C to 125C
Storage Temp. Range
65C to 150C
Lead Temp. (Soldering, 10 sec.)
300C
ESD Rating (Note 4)
2kV
Electrical Characteristics
Limits with standard typeface apply for T
J = 25C, and limits in boldface type apply over the full temperature range. Unless
otherwise specified V
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
+
Supply Voltage
2.85
6.5
V
I
Q
Supply Current
No Load
450
950
A
I
SD
Shutdown Supply Current
V
IN = 6.5V
6
30
A
V
SD
Shutdown Pin Input Voltage for
CE, SD
Logic Input High @ 6.5V
2.4
V
Logic Input Low @ 6.5V
0.8
I
L (+5V)
Output Current at V
05
2.85V < V
IN < 6.5V
50
mA
F
SW
Switch Frequency
85
130
180
kHz
P
EFF
Average Power Efficiency at V
05
2.85V < V
IN < 6.5V
I
L = 25mA to GND
82
%
V
05
Output Regulation
1mA < I
L < 50mA, VIN = 6.5V
4.848
5.05
5.252
V
1mA < I
L < 50mA, VIN = 6.5V
4.797
5.05
5.303
V
G
LINE
Line Regulation
2.85V < V
IN < 3.6V
0.25
%/V
3.6V < V
IN < 6.5V
0.05
G
LOAD
Load Regulation
1mA < I
L < 50mA, VIN = 6.5V
0.3
1.0
%
R
SW
Series Switch Resistance from V
05
to V
PSW
V
IN > 2.85V
5.0
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: V05 may be shorted to GND without damage. For temperature above 85C, V05 must not be shorted to GND or device may be damaged.
Note 3: The maximum allowable power dissipation is calculated by using PDMAX =(TJMAX —TA)/θJA, where TJMAX is the maximum junction temperature, TAis the
ambient temperature and
θJA is the junction-to-ambient thermal resistance of the specified package.
Note 4: The human body model is a 100pF capacitor discharged through a 1.5k
resistor into each pin.
Note 5: In the typical operating circuit, capacitors C1 and C3 are 2.2F, 0.3 maximum ESR capacitors. Capacitors with higher ESR will increase output resistance,
reduce output voltage and efficiency.
Note 6: The 50mA maximum current assumes no current is drawn from VDBL pin. See Voltage Doubler section in the Detailed Device Description.
LM2686
www.national.com
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