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
Pin: Input Voltage
V
OUT
Pin: Output Voltage
-0.3 to 6.0V
-0.3 to (V
IN
+ 0.3V) to
6.0V (max)
-0.3 to (V
IN
+ 0.3V) to
6.0V (max)
V
EN
Pin: Enable Input Voltage
Continuous Power Dissipation
(Note 3)
Junction Temperature (T
JMAX
)
Storage Temperature Range
Maximum Lead Temperature
(Soldering, 10 sec.)
Internally Limited
150C
-65 to 150C
265C
ESD Rating (Note 4)
Human Body Model
Machine Model
2 kV
200V
Operating Ratings
(Note 1)
,
(Note 2)
V
IN
: Input Voltage Range
V
EN
: Enable Voltage Range
2.5V to 5.5V
0 to (V
IN
+ 0.3V) to
5.5V (max)
0 to 100 mA
Recommended Load Current
(Note 5)
Junction Temperature Range (T
J
)
Ambient Temperature Range (T
A
)
(Note 5)
-40C to +125C
-40C to +85C
Thermal Properties
Junction to Ambient Thermal Resistance
θ
JA
(Note 6)
JEDEC Board (Note 16)
4L Cellphone Board
88C/W
157.4C/W
Electrical Characteristics
Limits in standard typeface are for T
= 25
o
C. Limits in
boldface
type apply over the full operating junction temperature range
(-40
o
C
≤
T
J
≤
+125
o
C). Unless otherwise noted, specifications apply to the LP5900 Typical Application Circuit (pg. 1) with: V
IN
= V
OUT (NOM)
+ 1.0V, V
EN
= 1.2V, C
IN
= C
OUT
= 0.47 μF, I
OUT
= 1.0 mA. (Note 2), (Note 7)
Symbol
Parameter
Conditions
V
IN
Input Voltage
V
OUT
Output Voltage Tolerance
V
IN
= (V
OUT(NOM)
+ 1.0V) to 5.5V, I
OUT
= 1 mA to 100mA
Line Regulation
V
IN
= (V
OUT(NOM)
+ 1.0V) to 5.5V, I
OUT
= 1 mA
Load Regulation
I
OUT
= 1 mA to 100 mA
I
LOAD
Load Current
(Note 9)
Maximum Output Current
(Note 15)
I
Q
Quiescent Current (Note 11)
V
EN
= 1.2V, I
OUT
= 0 mA
V
EN
= 1.2V, I
OUT
= 100 mA
V
EN
= 0.3V (Disabled)
I
G
Ground Current (Note 13)
I
OUT
= 0 mA (V
OUT
= 2.5V)
V
DO
Dropout Voltage
I
OUT
= 100 mA
I
SC
Short Circuit Current Limit
(Note 12)
PSRR
Power Supply Rejection Ratio
(Note 15)
f = 1 kHz, I
OUT
= 100 mA
f = 10 kHz, I
OUT
= 100 mA
f = 50 kHz, I
OUT
= 100 mA
f = 100 kHz, I
OUT
= 100 mA
e
n
Output Noise Voltage
(Note 15)
kHz, V
IN
= 4.2V
Min
2.5
2
Typ
Max
5.5
2
Units
V
%
0.05
%/V
0.001
%/mA
0
mA
100
25
100
0.003
30
80
300
85
75
65
52
40
7
10
6.5
160
20
50
200
1.0
μA
μA
mV
mA
150
f = 100 Hz, I
OUT
= 100 mA
dB
BW = 10 Hz to 100
I
OUT
= 0 mA
I
OUT
= 1 mA
I
OUT
= 100 mA
μV
RMS
T
SHUTDOWN
Thermal Shutdown
Temperature
Hysteresis
o
C
L
www.national.com
4