NJM2880
LOW DROPOUT VOLTAGE REGULATOR
■
GENERAL DESCRIPTION
The
NJM2880
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)
●
Output Noise Voltage
Vno=30uVrms (Cp=0.01uF)
●
Output capacitor with 1.0uF ceramic capacitor
●
Output Current
I
O
(max.)=300mA
●
High Precision Output
V
O
±1.0%
●
Low Dropout Voltage
0.10V typ. (I
O
=100mA)
●
ON / OFF Control
(Active High)
●
Internal Short Circuit Current Limit
●
Internal Thermal Overload Protection
●
Bipolar Technology
●
Package Outline
SOT-89 (5pin)
■
PIN CONFIGURATION
PIN FUNCTION
1. CONTROL (Active High)
2. GND
3. NOISE BYPASS
4. V
OUT
5. V
IN
■
PACKAGE OUTLINE
NJM2880U
NJM2880U
■
EQUIVALENT CIRCUIT
■
OUTPUT VOLTAGE RANK LIST
Device Name
NJM2880U21
NJM2880U25
NJM2880U26
NJM2880U27
NJM2880U28
NJM2880U285
NJM2880U03
V
OUT
2.1V
2.5V
2.6V
2.7V
2.8V
2.85V
3.0V
Device Name
NJM2880U33
NJM2880U38
NJM2880U05
V
OUT
3.3V
3.8V
5.0V
Ver.2003-07-18
-1-
NJM2880
■
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Input Voltage
Control Voltage
Power Dissipation
Operating Temperature
Storage Temperature
SYMBOL
V
IN
V
CONT
P
D
T
opr
T
stg
RATINGS
+14
+14 (note 1)
350
-40 to +85
-40 to +125
(Ta=25°C)
UNIT
V
V
mW
°C
°C
(note 1) When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
■
ELECTRICAL CHARACTERISTICS
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
V
O
I
Q
(V
IN
=V
O
+1V, C
O
=1.0uF : V
O
≥2.7V(C
O
=2.2uF : V
O
≤2.6V),
C
P
=0.01uF, T
a
=25°C)
TEST CONDITION
I
O
=30mA
I
O
=0mA, expect I
CONT
V
CONT
=0V
V
O
-0.3V
V
IN
=V
O
+1V to V
O
+6V, I
O
=30mA
I
O
=0 to 300mA
I
O
=100mA
e
in
=200mVrms, f=1kHz, I
O
=10mA
V
O
=3V Version
T
a
=0 to 85°C, I
O
=10mA
f=10Hz to 80kHz, I
O
=10mA
V
O
=3V Version
MIN.
-1.0%
-
-
300
-
-
-
-
-
-
1.6
-
TYP.
-
120
-
400
-
-
0.10
70
±50
30
-
-
MAX.
+1.0%
180
100
-
0.10
0.03
0.18
-
-
-
-
0.6
UNIT
V
uA
nA
mA
%/V
% / mA
V
dB
ppm / °C
uVrms
V
V
SYMBOL
I
Q(OFF)
I
O
∆V
O
/
∆V
IN
∆V
O
/
∆I
O
∆V
I-O
RR
∆V
O
/
∆T
a
V
NO
V
CONT(ON)
V
CONT(OFF)
(note 2) 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.
■
TEST CIRCUIT
-2-
Ver.2003-07-18
NJM2880
■
TYPICAL APPLICATION
1
○
In the case where ON / OFF Control is not required :
Connect control terminal to V
IN
terminal
The quiescent current can be reduced by using a resistance “R”. Instead, it increases the minimum operating
voltage. For further information, please refer to Figure “Output Voltage vs. Control Voltage”.
2
○
In use of ON / OFF CONTROL :
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 0.01uF greater to avoid the problem.
Ver.2003-07-18
-3-
NJM2880
■
TYPICAL CHARACTERISTICS
NJM2880_3.0V
Output Voltage vs. Input Vaoltage
NJM2880_3.0V
Output Voltage vs. Output Current
NJM2880_3.0V
Ground Pin Current vs. Output Current
NJM2880_3.0V
Dropout Voltage vs. Output Current
NJM2880_3.0V
Control Current vs. Control Voltage
NJM2880_3.0V
Output Voltage vs. Control Voltage
-4-
Ver.2003-07-18
NJM2880
■
TYPICAL CHARACTERISTICS
NJM2880_3.0V
Output Noise Voltage vs. Noise bypass Capacitor
NJM2880_3.0V
Output Noise Voltage vs. Output Current
NJM2880_3.0V
Ripple Rejection vs. Frequency
NJM2880_3.0V
Ripple Rejection vs. Output Current
NJM2880_3.0V
Equivalent Serise Resistance vs. Output Current
Ver.2003-07-18
-5-
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