NJM2861/62
LOW DROPOUT VOLTAGE REGULATOR
!
GENERAL DESCRIPTION
The NJM2861/62 is a low dropout voltage regulator.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
!
FEATURES
"
High Ripple Rejection
70dB typ. (f=1kHz,Vo=3V Version)
"
Output Noise Voltage
Vno=30µVrms typ.(Cp=0.01µF)
"
Output capacitor with 1.0uF ceramic capacitor (Vo≥2.7V)
"
Output Current
Io(max.)=100mA
"
High Precision Output
Vo±1%
"
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 (Active High)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
1 2 3
NJM2861F
!
EQUIVALENT CIRCUIT
V
IN
Cont
Bandgap
Reference
Thermal
Protection
Noise
Bypass
!
PACKAGE OUTLINE
NJM2861F/62F
5
4
1.V
IN
2.GND
3.CONTROL (Active High)
4.NOISE BYPASS
1 2 3
5.V
OUT
NJM2862F
5
4
V
OUT
GND
Ver.2006-02-20
-1-
NJM2861/62
!
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Device Name
2.1V
NJM286×F21
NJM286×F285
2.5V
NJM286×F25
NJM286×F03
2.6V
NJM286×F26
NJM286×F31
2.7V
NJM286×F27
NJM286×F33
2.8V
NJM286×F28
NJM286×F35
!
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
V
OUT
2.85V
3.0V
3.1V
3.3V
3.5V
Device Name
NJM286×F38
NJM286×F04
NJM286×F46
NJM286×F47
NJM286×F05
V
OUT
3.8V
4.0V
4.6V
4.7V
5.0V
(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: Vo≥2.7V (Co=2.2µF: Vo≤2.6V), Cp=0.01µF, Ta=25°C)
PARAMETER
Output Voltage
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Dropout Voltage
Ripple Rejection
Average Temperature
Coefficient of Output Voltage
Output Noise Voltage
Control Voltage for ON-state
Control Voltage for OFF-state
SYMBOL
Vo
I
Q
I
Q(OFF)
Io
∆Vo/∆V
IN
∆Vo/∆Io
∆V
I
−
O
RR
∆Vo/∆Ta
V
NO
V
CONT(ON)
V
CONT(OFF)
TEST CONDITION
Io=30mA
Io=0mA, expect Icont
V
CONT
=0V
Vo−0.3V
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Io=0
∼
60mA
Io=60mA
ein=200mVrms,f=1kHz, Io=10mA
V
IN
=Vo+1V, Vo=3V Version
Ta=0∼85°C, Io=10mA
f=10Hz∼80kHz, Io=10mA,
Vo=3V Version
MIN.
-1%
−
−
100
−
−
−
−
−
−
1.6
−
TYP.
−
120
−
130
−
−
0.10
70
±50
30
−
−
MAX.
+1%
180
100
-
0.10
0.03
0.18
−
−
−
−
0.6
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
V
V
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.
-2-
Ver.2006-02-20
NJM2861/62
!
TEST CIRCUIT
I
IN
V
IN
V
OUT
1.0µF
(ceramic
I
OUT
*4
A
V
IN
0.1µF
NJM2861/62
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
NOISE
BYPASS
GND
Cp=0.01µF
*4 Vo
≤
2.6V version: Co=2.2
µ
F(ceramic)
Ver.2006-02-20
-3-
NJM2861/62
!
TYPICAL APPLICATION
1
In case that ON/OFF Control is not required:
V
IN
0.1µF
V
IN
V
OUT
1.0µF
*5
V
OUT
NJM2861/62
R
(0~300kΩ)
CONTROL
NOISE
BYPASS
Cp=0.01µF
GND
*5 Vo≤2.6V version: Co=2.2µF
Connect control terminal to V
IN
terminal
2
In use of ON/OFF CONTROL:
V
IN
V
IN
V
OUT
1.0µF
0.1µF
R
CONTROL NOISE
BYPASS
GND
Cp=0.01µF
*5
V
OUT
NJM2861/62
*5 Vo
≤
2.6V version: Co=2.2
µ
F
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
NJM2861/62
!
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2861/62F 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-
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