Enable. Logic Input. High voltage = ON, Low voltage = SHUTDOWN
Second Flying-Capacitor: Positive Terminal
Ground Connection
Second Flying Capacitor: Negative Terminal
Description
Ordering Information
Output
Voltage
1.50V
1.80V
2.00V
Ordering
Information
LM2788MM-1.5
LM2788MMX-1.5
LM2788MM-1.8
LM2788MMX-1.8
LM2788MM-2.0
LM2788MMX-2.0
MSOP-8
Package Type
Package Marking
S30B
S30B
S23B
S23B
S24B
S24B
Supplied as
1000 units on Tape-and Reel
3500 units onTape-and-Reel
1000 units on Tape-and Reel
3500 units on Tape-and Reel
1000 units on Tape-and Reel
3500 units on Tape-and Reel
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2
LM2788
Absolute Maximum Ratings
2)
(Notes 1,
Operating Ratings
Input Voltage Range
Recommended Output Current
Range
Junction Temperature Range
Ambient Temperature Range
(Note 6)
(Notes 1, 2)
2.6V to 5.5V
0mA to 120mA
-40˚C to 125˚C
-40˚C to 85˚C
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
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
150˚C
Internally Limited
Unlimited
−65˚C to 150˚C
260˚C
2 kV
200V
Thermal Information
Junction-to-Ambient Thermal
Resistance, MSOP-8 Package
(θ
JA
) (Note 7)
220˚C/W
Electrical Characteristics
(Notes 2, 8) Limits in standard typeface and typical values apply for T
J
=
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)
Symbol
Parameter
Conditions
2.8V
≤
V
IN
≤
4.2V
0mA
≤
I
OUT
≤
120mA
4.2V
≤
V
IN
≤
5.5V
0mA
≤
I
OUT
≤
120 mA
2.8V
≤
V
IN
≤
4.2V
0mA
≤
I
OUT
≤
120 mA
4.2V
≤
V
IN
≤
5.5V
0mA
≤
I
OUT
≤
120mA
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)
V
IN
= 3.6, V
OUT
= 0V
0.9
0
V
EN
= 0V
V
EN
= 5.5V
0
30
Min
-5
-6
Typ
Max
+5
+6
Units
LM2788-1.8, LM2788-2.0
% of
V
OUT (nom)
(Note 10)
V
OUT
Output Voltage Tolerance
LM2788-1.5
-6
-6
+6
+6
% of
V
OUT (nom)
(Note 10)
V
OUT
Output Voltage Tolerance
All Output Voltage Options
I
Q
I
SD
Operating Supply Current
Shutdown Supply Current
Output Voltage Ripple
Peak Efficiency
Average Efficiency over
Li-Ion Input Voltage Range
(Note 11)
Turn-On Time
Switching Frequency
Short-Circuit Current
EN pin Logic-High Input
EN pin Logic-Low Input
EN pin input current
32
0.1
20
90
76
82
75
0.4
500
25
50
2
µA
µA
mV
p-p
%
%
ms
kHz
mA
V
R
E
PEAK
E
AVG
t
ON
f
SW
I
SC
V
IH
V
IL
I
EN
Enable Pin (EN) Characteristics
V
IN
0.4
V
V
nA
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.
3
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LM2788
(Notes 2, 8) Limits in standard typeface and typical values apply for T
J
= 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) (Continued)
Note 4:
Thermal shutdown circuitry protects the device from permanent damage.
Note 5:
The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin.
Note 6:
Maximum ambient temperature (T
A-MAX
) is dependent on the maximum operating junction temperature (T
J-MAX-OP
= 125
o
C), the maximum power
dissipation of the device in the application (P
D-MAX
), and the junction-to ambient thermal resistance of the part/package in the application (θ
JA
), as given by the
following equation: T
A-MAX
= T
J-MAX-OP
- (θ
JA
x P
D-MAX
). The ambient temperature operating rating is provided merely for convenience. This part may be operated
outside the listed T
A
rating, so long as the junction temperature of the device does not exceed the maximum operating rating of 125
o
C.
Note 7:
Junction-to-ambient thermal resistance is a highly application and board-layout dependent. In applications where high maximum power dissipation exists,
special care must be paid to thermal dissipation issues. Fore more information on these topics, please refer to the
Power Dissipation
section of this datasheet.
Note 8:
All room temperature limits are 100% tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed by correlation
using standard Statistical Quality Control methods (SQC). All limits are used to calculate Average Outgoing Quality Level (AOQL). Typical numbers are not
guaranteed, but do represent the most likely norm.
Note 9:
C
FLY
, C
IN
, and C
OUT
: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics
Note 10:
Nominal output voltage (V
OUT
(nom) ) is the target output voltage of the part, as given by the output-voltage-option identifier. See
Ordering Information
table for available options.
Note 11:
Efficiency is measured versus V
IN
, with V
IN
being swept in small increments from 3.0V to 4.2V. The average is calculated from these measurements
results. Weighting to account for battery voltage discharge characteristics (V
BAT
vs. Time) is not done in computing the average.
Note 12:
Turn-on time is measured from when the EN signal is pulled high until the output voltage crosses 90% of its final value.
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