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参数资料
| 型号： | LM3351MWC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 275 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | WAFER |
| 文件页数： | 4/11页 |
| 文件大小： | 316K |
| 代理商： | LM3351MWC |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Input Voltage, Step-Down
5.5V
Maximum Input Voltage, Step-Up
3.65V
Power Dissipation (P
D)(TA=25C,
(Note 2))
500 mW
θ
ja (Note 2)
250C/W
Tj Max (Note 2)
150C
Storage Temperature
65C to +150C
Lead Temperature (Soldering, 10
secs)
260C
ESD Susceptibility (Note 3)
2kV
Not short circuit protected.
Operating Conditions (Note 1)
Ambient Temperature Range
40C to + 85C
Electrical Characteristics
3/2 Step-Up Voltage Converter
Specifications in standard type face are for T
j = 25C, and those with boldface type apply over full operating temperature
range. Unless otherwise specified, V
in = 3.3V, VEnable = 3.3V, Iload = 50 mA, C1,C2,Cin and Cout = 1 F.
Symbol
Parameter
Conditions
Typ (Note 4)
Limits (Note 5)
Units
V
outNL
Output Voltage at
No Load
I
load = 0 A
5.0
V
outFL
Output Voltage at
50 mA
I
load =50mA
4.7
V
in
Input Supply
Voltage Range
3.3
V
2.5
V(Min)
3.65
V(Max)
I
Q1
Quiescent Current
Shutdown Mode, V
Enable = 0V,
I
load=0 A; Current into pin Vlow
0.025
A
3
A(Max)
I
Q2
Quiescent Current
Normal Mode, I
Ioad = 0A; Current into
pin V
Iow
1.1
mA
1.5
mA(Max)
Z
out
Output Source
Impedance
I
load =50mA
4.2
6.25
(Max)
f
SW
Switching
Frequency
(Note 6)
200
kHz
125
kHz(Min)
275
kHz(Max)
V
Enable
Enable Threshold
Voltage
1.7
V
1.0
V(Min)
2.5
V(Max)
I
Enable
Leakage Current
Current into ENABLE pin; ENABLE =
5V and all other pins at ground
0.025
A
1
A(Max)
Pη
Power Efficiency
95
%
Electrical Characteristics
2/3 Step-Down Voltage Converter
Specifications in standard type face are for T
j = 25C, and those with boldface type apply over full operating temperature
range. Unless otherwise specified, V
high = 5V, VEnable = 5V, Iload = 50 mA, C1,C2,Cin and Cout = 1 F.
Symbol
Parameter
Conditions
Typ (Note 4)
Limits (Note 5)
Units
V
outNL
Output Voltage at
No Load
I
load = 0 A
3.3
V
outFL
Output Voltage at
50 mA
I
load =50 mA
3.2
V
in
Input Supply
Voltage Range
5V
2.2
V(Min)
5.5
V(Max)
I
Q1
Quiescent Current
Shutdown Mode, V
Enable = 0V,
I
load=0 A; Current into pin Vhigh
0.25
A
3
A(Max)
LM3351
www.national.com
2
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