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参数资料
| 型号： | LM828MWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 56 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | WAFER |
| 文件页数： | 3/10页 |
| 文件大小： | 221K |
| 代理商： | LM828MWC |
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+ to
GND, or GND to OUT)
5.8V
V+ and OUT Continuous
Output Current
50 mA
Output Short-Circuit
Duration to GND (Note 2)
1 sec.
Continuous Power
Dissipation (T
A =
25C)(Note 3)
240 mW
T
JMax (Note 3)
150C
θ
JA (Note 3)
300C/W
Operating Junction
Temperature Range
40C to 85C
Storage Temperature
Range
65C to +150C
Lead Temp. (Soldering, 10
seconds)
300C
ESD Rating (Note 7)
2kV
Electrical Characteristics
Limits in standard typeface are for T
J = 25C, and limits in boldface type apply over the full operating temperature range. Un-
less otherwise specified: V+ = 5V, C
1 =C2 = 10 F. (Note 4)
Symbol
Parameter
Condition
Min
Typ
Max
Units
V+
Supply Voltage
R
L =10k
1.8
5.5
V
I
Q
Supply Current
No Load
40
75
A
115
R
OUT
Output Resistance (Note 5)
I
L = 5 mA
20
65
f
OSC
Oscillator Frequency (Note 6)
Internal
12
24
56
kHz
f
SW
Switching Frequency (Note 6)
Measured at CAP+
6
12
28
kHz
P
EFF
Power Efficiency
I
L = 5 mA
97
%
V
OEFF
Voltage Conversion Efficiency
No Load
95
99.96
%
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
beyond its rated operating conditions.
Note 2: OUT may be shorted to GND for one second without damage. However, shorting OUT to V+ may damage the device and should be avoided. Also, for
temperatures above 85C, OUT must not be shorted to GND or V+, or the 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, TA is the
ambient temperature, and
θJA is the junction-to-ambient thermal resistance of the package.
Note 4: In the test circuit, capacitors C1 and C2 are 10 F, 0.3 maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce
output voltage and efficiency.
Note 5: Specified output resistance includes internal switch resistance and capacitor ESR. See the details in the application information.
Note 6: The output switches operate at one half of the oscillator frequency, fOSC =2fSW.
Note 7: The human body model is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin.
LM828
www.national.com
2
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