參數(shù)資料
型號： LM2788
廠商： National Semiconductor Corporation
元件分類： 基準電壓源/電流源
英文描述： 120mA High Efficiency Step-Down Switched Capacitor Voltage Converter
中文描述： 一二零毫安高效降壓型開關(guān)電容電壓轉(zhuǎn)換器
文件頁數(shù)： 3/12頁
文件大小： 372K
代理商： LM2788
Absolute Maximum Ratings
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
(Notes 1,
V
IN
, EN pins: Voltage to Ground
(Note 3)
Junction Temperature (T
J-MAX-ABS
)
Continuous Power Dissipation
(Note 4)
V
OUT
Short-Circuit to GND Duration
(Note 4)
Storage Temperature Range
Lead Temperature
(Soldering, 5 Sec.)
ESD Rating (Note 5)
Human-body model:
Machine model
0.3V to 5.6V
150C
Internally Limited
Unlimited
65C to 150C
260C
2 kV
200V
Operating Ratings
(Notes 1, 2)
Input Voltage Range
Recommended Output Current
Range
Junction Temperature Range
Ambient Temperature Range
(Note 6)
2.6V to 5.5V
0mA to 120mA
-40C to 125C
-40C to 85C
Thermal Information
Junction-to-Ambient Thermal
Resistance, MSOP-8 Package
(
θ
JA
) (Note 7)
220C/W
Electrical Characteristics
25
o
C. Limits in
boldface
type apply over the operating junction temperature range. Unless otherwise specified: 2.6
≤
V
IN
≤
5.5V, V(EN) = V
IN
, C
1
= C
2
= 1μF, C
IN
= C
OUT
= 10μF. (Note 9)
(Notes 2, 8)
Limits in standard typeface and typical values apply for T
J
=
Symbol
LM2788-1.8, LM2788-2.0
Parameter
Conditions
Min
Typ
Max
Units
V
OUT
Output Voltage Tolerance
2.8V
≤
V
IN
≤
4.2V
0mA
≤
I
OUT
≤
120mA
4.2V
≤
V
IN
≤
5.5V
0mA
≤
I
OUT
≤
120 mA
-5
+5
% of
V
OUT (nom)
(Note 10)
-6
+6
LM2788-1.5
V
OUT
Output Voltage Tolerance
2.8V
≤
V
IN
≤
4.2V
0mA
≤
I
OUT
≤
120 mA
4.2V
≤
V
IN
≤
5.5V
0mA
≤
I
OUT
≤
120mA
-6
+6
% of
V
OUT (nom)
(Note 10)
-6
+6
All Output Voltage Options
I
Q
Operating Supply Current
I
SD
Shutdown Supply Current
V
R
Output Voltage Ripple
E
PEAK
Peak Efficiency
Average Efficiency over
Li-Ion Input Voltage Range
(Note 11)
I
OUT
= 0mA
V(EN) = 0V
LM2788-1.8: V
IN
= 3.6V, I
OUT
= 120mA
LM2788-1.8: V
IN
= 3.0V, I
OUT
= 60mA
LM2788-1.5: 3.0
≤
V
IN
≤
4.2V, I
OUT
= 60mA
LM2788-1.8: 3.0
≤
V
IN
≤
4.2V, I
OUT
= 60mA
LM2788-2.0: 3.0
≤
V
IN
≤
4.2V, I
OUT
= 60mA
V
IN
= 3.6V, I
OUT
= 120mA (Note 12)
32
0.1
20
90
76
82
75
0.4
500
25
50
2
μA
μA
mV
p-p
%
E
AVG
%
t
ON
f
SW
I
SC
Enable Pin (EN) Characteristics
V
IH
EN pin Logic-High Input
V
IL
EN pin Logic-Low Input
Turn-On Time
Switching Frequency
Short-Circuit Current
ms
kHz
mA
V
IN
= 3.6, V
OUT
= 0V
0.9
0
V
IN
0.4
V
V
nA
I
EN
EN pin input current
V
EN
= 0V
V
EN
= 5.5V
0
30
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of
the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the
Electrical Characteristics tables.
Note 2:
All voltages are with respect to the potential at the GND pin.
Note 3:
Voltage on the EN pin must not be brought above V
IN
+ 0.3V.
L
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