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LM2797 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM2797
Descripción Electrónicos  120mA High Efficiency Step-Down Switched Capacitor Voltage Converter with Voltage Monitoring
PDF  14 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2797 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V
IN, EN, POK, BATOK pins: Voltage
to Ground (Note 3)
−0.3V to 5.6V
Junction Temperature (T
J-MAX-ABS)
150˚C
Continuous Power Dissipation
(Note 4)
Internally Limited
V
OUT Short-Circuit to GND Duration
(Note 4)
Unlimited
Storage Temperature Range
−65˚C to 150˚C
Lead Temperature
(Soldering, 5 Sec.)
260˚C
ESD Rating (Note 5)
Human-body model:
Machine model
2kV
200V
Operating Ratings
(Notes 1, 2)
Input Voltage Range
2.6V to 5.5V
Recommended Output Current
Range
0mA to 120mA
Junction Temperature Range
-40˚C to 125˚C
Ambient Temperature Range
(Note 6)
-40˚C to 85˚C
Thermal Information
Thermal Resistance, MSOP-8
220˚C/W
Resistance, MSOP-8 Package
(
θ
JA) (Note 7)
Electrical Characteristics
(Notes 2, 8)
Limits in standard typeface and typical values apply for T
J =25
oC. Limits in boldface type apply over the operating junction
temperature range. Unless otherwise specified: 2.6
≤ V
IN
≤ 5.5V, V(EN) = V
IN,C1 =C2 = 1µF, CIN =COUT = 10µF. (Note 9)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
LM2797-1.8, LM2798-1.8, LM2798-2.0
V
OUT
Output Voltage Tolerance
2.8V
≤ V
IN
≤ 4.2V
0mA
≤ I
OUT
≤ 120mA
-5
+5
%of
V
OUT(nom)
(Note 10)
4.2V < V
IN
≤ 5.5V
0mA
≤ I
OUT
≤ 120mA
-6
+6
LM2798-1.5
V
OUT
Output Voltage Tolerance
2.8V
≤ V
IN
≤ 4.2V
0mA
≤ I
OUT
≤ 120mA
-6
+6
%of
V
OUT(nom)
(Note 10)
4.2V < V
IN
≤ 5.5V
0mA
≤ I
OUT
≤ 120mA
-6
+6
All Output Voltage Options
I
Q
Operating Supply Current
I
OUT = 0mA
35
50
µA
I
SD
Shutdown Supply Current
V(EN) = 0V
0.1
2
µA
V
R
Output Voltage Ripple
LM2798-1.8: V
IN = 3.6V, IOUT = 120mA
20
mV
p-p
E
PEAK
Peak Efficiency
LM2798-1.8: V
IN = 3.0V, IOUT = 60mA
90
%
E
AVG
Average Efficiency over
Li-Ion Input Voltage Range
(Note 11)
LM2798-1.5: 3.0
≤ V
IN
≤ 4.2V, I
OUT = 60mA
76
%
LM2798-1.8: 3.0
≤ V
IN
≤ 4.2V, I
OUT = 60mA
82
LM2798-2.0: 3.0
≤ V
IN
≤ 4.2V, I
OUT = 60mA
75
t
ON
Turn-On Time
LM2798, V
IN=2.6V, IOUT=100mA, (Note 12)
400
µs
LM2797, V
IN=2.6V, IOUT=100mA, (Note 12)
100
f
SW
Switching Frequency
500
kHz
I
SC
Short-Circuit Current
V
IN = 3.6, VOUT =0V
25
mA
Enable Pin (EN) Characteristics
V
IH
EN pin Logic-High Input
0.9
V
IN
V
V
IL
EN pin Logic-Low Input
0
0.4
V
I
EN
EN pin input current
V
EN =0V
0
nA
V
EN = 5.5V
30
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