NJM2863/64
Ultra Low Noise Low Dropout Voltage Regulator
!
GENERAL DESCRIPTION
The NJM2863/64 is a low dropout voltage regulator designed for
VCO Applications.
Advanced Bipolar technology achieves ultra low noise, high ripple
rejection and low quiescent current.
!
PACKAGE OUTLINE
NJM2863F/64F
!
FEATURES
"
High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
"
Output capacitor with 1.0µF ceramic capacitor
"
Output Noise Voltage
Vno=19µVrms typ. (Cp=0.01µF, Co=1.0µF(Ceramic))
Vno=12µVrms typ. (Cp=0.1µF, Co=10µF(Tantalum))
"
Output Current
Io(max.)=100mA
"
High Precision Output
Vo±1.0%
"
Low Dropout Voltage
0.10V typ. (Io=60mA)
"
ON/OFF Control
(Active High)
"
Internal Short Circuit Current Limit
"
Internal Thermal Overload Protection
"
Bipolar Technology
"
Package Outline
SOT-23-5
!
PIN CONFIGURATION
1.CONTROL
2.GND
3.NOISE BYPASS
4.V
OUT
1 2 3
5.V
IN
NJM2863F
!
EQUIVALENT CIRCUIT
V
IN
Control
Bandgap
Reference
Thermal
Protection
Noise
Bypass
V
OUT
5
4
5
4
1 2 3
1.V
IN
2.GND
3.CONTROL
4.NOISE BYPASS
5.V
OUT
NJM2864F
GND
Ver.2006-02-20
-1-
NJM2863/64
!
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
2.1V
NJM286×F21
2.5V
NJM286×F25
2.7V
NJM286×F27
2.8V
NJM286×F28
2.85V
NJM286×F285
Device Name
NJM286×F29
NJM286×F03
NJM286×F33
NJM286×F05
V
OUT
2.9V
3.0V
3.3V
5.0V
!
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(*1)
V
350(*2)
Power Dissipation
P
D
SOT-23-5
mW
200(*3)
Operating Temperature
Topr
−40 ∼
+85
°C
Storage Temperature
Tstg
−40 ∼
+125
°C
(*1): When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
(*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*3): Device itself.
!
ELECTRICAL CHARACTERISTICS (V
IN
=Vo+1V, C
IN
=0.1µF, Co=1.0µF, Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP.
Output Voltage
Vo
Io=30mA
-1.0%
−
Quiescent Current
I
Q
Io=0mA, except Icont
120
−
Quiescent Current
V
CONT
=0V
I
Q(OFF)
−
−
at Control OFF
Output Current
Io
Vo-0.3V
100
130
Line Regulation
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
−
−
Load Regulation
∆Vo/∆Io
Io=0
∼
100mA
−
−
Io=60mA
0.10
Dropout Voltage
∆V
I−O
−
ein=200mVrms,f=1kHz, Io=10mA,
Ripple Rejection
RR
75
−
Vo=3V Version
Average Temperature
Coefficient of Output
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±
50
−
Voltage
f=10Hz∼80kHz, Io=10mA, Cp=0.01µF,
Output Noise Voltage1
V
NO1
19
−
Co=1.0µF (Ceramic), Vo=3V Version
f=10Hz∼80kHz, Io=10mA, Cp=0.1µF,
Output Noise Voltage2
V
NO2
12
Co=10µF (Tantalum), Vo=3V Version
Control Voltage for
1.6
V
CONT(ON)
−
ON-state
Control Voltage for
V
CONT(OFF)
−
−
OFF-state
The above specification is a common specification for all output voltages.
Therefore, it may be different from the individual specification for a specific output voltage.
MAX.
+1.0%
180
100
−
0.10
0.03
0.18
−
−
−
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
µVrms
−
0.6
V
V
-2-
Ver.2006-02-20
NJM2863/64
!
TEST CIRCUIT
A
V
IN
I
IN
V
IN
V
OUT
1.0µF
(ceramic)
0.1µF
NJM2863/64
NOISE
CONTROL BYPASS
I
OUT
V
V
OUT
A
V
V
CONT
I
CONT
GND
Cp=0.01µF
Ver.2006-02-20
-3-
NJM2863/64
!
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
0.1µF
V
IN
V
OUT
1.0µF
V
OUT
NJM2863/64
R
NOISE
CONTROL BYPASS
(0∼300kΩ)
GND
Cp=0.01µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
1.0µF
V
OUT
0.1µF
NJM2863/64
R
NOISE
CONTROL BYPASS
GND
Cp=0.01µF
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
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. Use of smaller Cp value may cause oscillation.
Use the Cp value of 0.01µF greater to avoid the problem.
%In
the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up resistance
"R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by I
CONT
and the
resistance "R". The I
CONT
is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds the
V
CONT (ON)
over the required temperature range.
-4-
Ver.2006-02-20
NJM2863/64
!
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2863/64F Power Dissipation
(Topr=-40½+85℃,Tj=125℃,P
D
=200mW(Ta≦25℃))
500
Power Dissipation P
D
(mW)
400
On Board(114.3×76.2×1.6mm, FR-4)
300
Device itself
200
100
0
-50
-25
0
25
50
75
100
Ambient Temperature Ta(℃)
Ver.2006-02-20
-5-
传感器
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