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參數(shù)資料
| 型號(hào)： | LM2766 |
| 廠商： | National Semiconductor Corporation |
| 元件分類(lèi)： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Switched Capacitor Voltage Converter |
| 中文描述： | 開(kāi)關(guān)電容電壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 3/9頁(yè) |
| 文件大?。?/td> | 220K |
| 代理商： | LM2766 |
Absolute Maximum Ratings
(Note 2)
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 V+ to V
OUT
)
SD
5.8V
(GND 0.3V) to (V+ +
0.3V)
40 mA
1 sec.
600 mW
V
OUT
Continuous Output Current
Output Short-Circuit Duration to GND (Note 3)
Continuous Power
Dissipation (T
A
= 25C)(Note 4)
T
JMax
(Note 4)
150C
Operating Ratings
θ
JA
(Note 4)
Junction Temperature Range
Ambient Temperature Range
Storage Temperature Range
Lead Temp. (Soldering, 10
seconds)
ESD Rating (Note 5)
Human body model
Machine model
210C/W
40 to 100C
40 to 85C
65C to 150C
240C
2kV
200V
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
= C
2
= 1.0 μF. (Note 6)
Symbol
Parameter
Condition
V+
Supply Voltage
I
Q
Supply Current
No Load
I
SD
Shutdown Supply Current
T
A
= 85C
V
SD
Shutdown Pin Input Voltage
Shutdown Mode
Normal Operation
I
L
Output Current
2.5V
≤
V
IN
≤
5.5V
1.8V
≤
V
IN
<
2.5V
R
OUT
Output Resistance (Note 7)
I
L
= 20 mA
f
OSC
Oscillator Frequency
(Note 8)
f
SW
Switching Frequency
(Note 8)
P
EFF
Power Efficiency
I
L
= 20 mA to GND
V
OEFF
Voltage Conversion Efficiency
No Load
Note 2:
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 3:
V
OUT
may be shorted to GND for one second without damage. However, shorting V
OUT
to V+ may damage the device and should be avoided. Also, for tem-
peratures above 85C, V
OUT
must not be shorted to GND or V+, or device may be damaged.
Note 4:
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.
Note 5:
The human body model is a 100pF capacitor discharged through a 1.5k
resistor into each pin. The machine model is a 200pF capacitor discharged directly
into each pin.
Note 6:
In the test circuit, capacitors C
1
and C
2
are 1.0 μF, 0.3
maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output
voltage and efficiency.
Note 7:
Specified output resistance includes internal switch resistance and capacitor ESR. See the details in the application information for positive voltage doubler.
Note 8:
The output switches operate at one half of the oscillator frequency, f
OSC
= 2f
SW
.
Min
1.8
Typ
Max
5.5
950
0.5
Units
V
μA
350
0.1
0.2
μA
0.6
V
2.0
20
10
mA
20
400
200
94
99.96
55
700
350
220
110
kHz
kHz
%
%
L
www.national.com
3
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