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参数资料
| 型号： | LM2661MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 80 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 8/15页 |
| 文件大小： | 353K |
| 代理商： | LM2661MDC |
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)
6V
LV
(OUT 0.3V) to (GND + 3V)
FC, OSC
The least negative of (OUT 0.3V)
or (V+ 6V) to (V+ + 0.3V)
V+ and OUT Continuous Output Current
120 mA
Output Short-Circuit Duration to GND (Note 2)
1 sec.
Package
MMM
Power Dissipation
(T
A = 25C) (Note 3)
735 mW
500 mW
T
J Max (Note 3)
150C
θ
JA (Note 3)
170C/W
250C/W
Operating Junction
Temperature
Range
40C to +85C
Storage Temperature Range
65C to +150C
Lead Temperature
300C
(Soldering, 10 seconds)
ESD Rating
2 kV
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, FC = Open, C
1 =C2 = 150 F. (Note 4)
Symbol
Parameter
Condition
Min
Typ
Max
Units
V+
Supply Voltage
R
L = 1k
Inverter, LV = Open
3.5
5.5
Inverter, LV = GND
1.5
5.5
V
Doubler, LV = OUT
2.5
5.5
I
Q
Supply Current
No Load
FC = Open (LM2660)
0.12
0.5
mA
LV = Open
FC = V+ (LM2660) or
1
3
SD = Ground (LM2661)
I
SD
Shutdown Supply Current
0.5
2
A
(LM2661)
V
SD
Shutdown Pin Input Voltage
Shutdown Mode
2.0
(Note 5)
V
(LM2661)
Normal Operation
0.3
I
L
Output Current
T
A ≤ +85C, OUT ≤ 4V
100
mA
T
A > +85C, OUT ≤ 3.8V
100
R
OUT
Output Resistance (Note 6)
I
L = 100 mA
T
A ≤ +85C
6.5
10
T
A > +85C
12
f
OSC
Oscillator Frequency (Note 7)
OSC = Open
FC = Open
5
10
kHz
FC=V+
40
80
f
SW
Switching Frequency (Note 8)
OSC = Open
FC = Open
2.5
5
kHz
FC=V+
20
40
I
OSC
OSC Input Current
FC = Open
±2
A
FC=V+
±16
P
EFF
Power Efficiency
R
L (1k) between V
+ and OUT
96
98
R
L (500) between GND and OUT
92
96
%
I
L = 100 mA to GND
88
V
OEFF
Voltage Conversion Efficiency
No Load
99
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 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 specified package.
Note 4: In the test circuit, capacitors C1 and C2 are 0.2 maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output
voltage and efficiency.
Note 5: In doubling mode, when Vout > 5V, minimum input high for shutdown equals Vout 3V.
Note 6: Specified output resistance includes internal switch resistance and capacitor ESR.
Note 7: For LM2661, the oscillator frequency is 80 kHz.
Note 8: The output switches operate at one half of the oscillator frequency, fOSC =2fSW.
LM2660/LM2661
www.national.com
2
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