NJM2873
LOW DROPOUT VOLTAGE REGULATOR
s
GENERAL DESCRIPTION
s
PACKAGE OUTLINE
The NJM2873 is low dropout voltage regulator designed
for cellular phone application.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
s
FEATURES
q
High Ripple Rejection
70dB typ. (f=1kHz)
q
Output Noise Voltage
Vno=30
Vrms (Cp=0.01
F)
q
Output capacitor with 1.0uF ceramic capacitor (Vo
2.7V)
q
Output Current
Io(max.)=150mA
q
High Precision Output
Vo
1%
q
Low Dropout Voltage
0.10V typ. (Io=60mA)
q
ON/OFF Control
(Active High)
q
Internal Short Circuit Current Limit
q
Internal Thermal Overload Protection
q
Bipolar Technology
q
Package Outline
FFP12-B1 (2.02.00.85mm)
s
PIN CONFIGURATION
NJM2873PB1
s
EQUIVALENT CIRCUIT
V
OUT
GND
V
IN
Thermal
Protection
Bandgap
Reference
Noise
Bypass
Cont
NJM2873PB1
PIN FUNCTION
1. V
IN
7.
GND
2. V
IN
8. NOISE BYPASS
3. V
IN
9.
NC
4. CONTROL
10. V
OUT
5. GND
11. V
OUT
6. GND
12. V
OUT
10
11
12
1
6
5
4
2
3
9
8
7
NJM2873
s
ABSOLUTE MAXIMUM RATINGS (Ta=25
C)
PARAMETER SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+14 V
Control Voltage
V
CONT
+14(note
1) V
Power Dissipation
P
D
300(note
2)
mW
Operating Temperature
Topr
-
40
+85
C
Storage Temperature
Tstg
-
40
+125
C
(note 1)When input voltage is less than +14V, the absolute maximum
control voltage is equal to the input voltage.
(note 2)On board.
s
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1uF, Co=1.0uF: Vo
2.7V (Co=2.2uF: Vo
2.6V), Cp=0.01uF, Ta=25
C)
PARAMETER SYMBOL
TEST
CONDITION MIN.
TYP.
MAX. UNIT
Output Voltage
Vo
Io=30mA
-1%
-
+1%
V
Quiescent Current
I
Q
Io=0mA, expect Icont
-
120 180
A
Quiescent Current
at Control OFF
I
Q(OFF)
V
CONT
=0V
-
-
100
nA
Output Current
Io
Vo
-
0.3V
150 200 - mA
Line Regulation
Vo/
V
IN
V
IN
=Vo+1V
Vo+6V, Io=30mA
-
-
0.10 %/V
Load Regulation
Vo/
Io Io=0
100mA
-
-
0.03 %/mA
Dropout Voltage
V
I
-
O
Io=60mA
-
0.10 0.18 V
Ripple Rejection
RR
ein=200mVrms,f=1kHz, Io=10mA
V
IN
=Vo+1V, Vo=3V Version
-
70
-
dB
Average Temperature
Coefficient of Output Voltage
Vo/
Ta Ta=0
85
C, Io=10mA
-
50
-
ppm/
C
Output Noise Voltage
V
NO
f=10Hz
80kHz, Io=10mA,
Vo=3V Version
-
30
-
Vrms
Control Voltage for ON-state V
CONT(ON)
1.6
-
-
V
Control Voltage for OFF-state V
CONT(OFF)
-
-
0.6 V
(note 3)Please confirm the specification separately because some parameters depend on output voltage.
s
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
NJM2873PB1-21 2.1V
NJM2873PB1-25 2.5V
NJM2873PB1-26 2.6V
NJM2873PB1-27 2.7V
NJM2873PB1-28 2.8V
NJM2873PB1-285 2.85V
NJM2873PB1-03 3.0V
NJM2873PB1-33 3.3V
NJM2873PB1-38 3.8V
NJM2873PB1-05 5.0V
NJM2873
s
TEST CIRCUIT
I
CONT
V
CONT
A
A
A
A
V
V
V
V
Cp=0.01
F
V
V
V
V
OR
2.2
F(Vo
2.6V)
1.0
F
V
OUT
I
OUT
0.1
F
V
IN
I
IN
A
A
A
A
NJM2873
CONTROL
GND
V
IN
V
OUT
V
IN
V
OUT
NOISE
BYPASS
NC
V
IN
V
OUT
GND
GND
NJM2873
s
TYPICAL APPLICATION
x
In the case where ON/OFF Control is not required:
Connect control terminal to V
IN
terminal
In case a resistance "R" is used, the quiescent current will be decreased. However, the but minimum
operating voltage will be increase as well. Please refer to a figure of Output Voltage vs. Control Voltage.
I
CONT
V
CONT
A
A
A
A
V
V
V
V
Cp=0.01
F
V
V
V
V
OR
2.2
F(Vo
2.6V)
1.0
F
V
OUT
I
OUT
0.1
F
V
IN
I
IN
A
A
A
A
NJM2873
CONTROL
GND
V
IN
V
OUT
V
IN
V
OUT
NOISE
BYPASS
NC
V
IN
V
OUT
GND
GND
NJM2873
y
In use of ON/OFF CONTROL:
In case the control terminal is "H", the output is enabled.
The control terminal is "L" or "open", the output is disabled.
Noise bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used. Please refer to the typical
characteristics to determine the value.
Use of smaller Cp value may induce oscillation.
Please make sure to use Cp value of greater than 0.01uF to avoid the problem.
Cp=0.01
F
0.1
F
R
(0
300k
)
V
IN
1.0
F
OR
2.2
F(Vo
2.6V)
V
OUT
NJM2873
CONTROL
GND
V
IN
V
OUT
V
IN
V
OUT
NOISE
BYPASS
NC
GND
GND
V
IN
V
OUT
NJM2873
s
ELECTRICAL CHARACTERISTICS
NJM2873
s
ELECTRICAL CHARACTERISTICS
NJM2873
s
ELECTRICAL CHARACTERISTICS
NJM2873
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
PDF 
ZIP