NJM2885
LOW DROPOUT VOLTAGE REGULATOR
!
GENERAL DESCRIPTION
The NJM2885 is low dropout voltage regulator designed for
portable application.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
!
FEATURES
"
High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
"
Output Noise Voltage
Vno=45µVrms typ.
"
Output capacitor with 2.2µF ceramic capacitor (Vo≥2.7V)
"
Output Current
Io(max.)=500mA
"
High Precision Output
Vo±1.0%
"
Low Dropout Voltage
0.18V typ. (Io=300mA)
"
Internal Short Circuit Current Limit
"
Internal Thermal Overload Protection
"
Bipolar Technology
"
Package Outline
TO-252-3
!
PIN CONFIGURATION
2
!
PACKAGE OUTLINE
NJM2885DL1
PIN FUNCTION
1.V
IN
2.GND
3.V
OUT
3
1
NJM2885DL1
!
EQUIVALENT CIRCUIT
V
IN
Thermal
Protection
Bandgap
Reference
V
OUT
GND
NJM2885
!
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Device Name
NJM2885DL1-15
1.5V
NJM2885DL1-28
NJM2885DL1-18
1.8V
NJM2885DL1-03
NJM2885DL1-19
1.9V
NJM2885DL1-33
NJM2885DL1-21
2.1V
NJM2885DL1-35
NJM2885DL1-25
2.5V
NJM2885DL1-38
NJM2885DL1-26
2.6V
NJM2885DL1-05
!
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Power Dissipation
Operating Temperature
Storage Temperature
P
D
Topr
Tstg
V
OUT
2.8V
3.0V
3.3V
3.5V
3.8V
5.0V
(Ta=25°C)
UNIT
V
W
°C
°C
RATINGS
+14
8(Tc=25°C)
0.8(Ta≤25°C)
-40
∼
+85
-40
∼
+125
!
Operating Voltage
V
IN
=+2.3V
∼
+14.0V (In case of Vo<2.1V)
!
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.33µF, Co=2.2µF,(1.7V<Vo≤2.6V: Co=4.7µF, Vo≤1.7V:Co=10µF), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
V
−
Quiescent Current
I
Q
Io=0mA
200
300
µA
−
Output Current
Io
Vo-0.3V
500
650
-
mA
Line Regulation
0.10
%/V
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6.0V, Io=30mA
−
−
Load Regulation
0.03 %/mA
∆Vo/∆Io
Io=0
∼
500mA
−
−
Io=300mA
0.18
0.28
V
Dropout Voltage
∆V
I−O
−
ein=200mVrms,f=1kHz, Io=10mA
Ripple Rejection
RR
75
dB
−
−
Vo=3.0V Version
Average Temperature
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
±50
ppm/°C
−
−
Coefficient of Output Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
V
NO
45
µVrms
−
−
Vo=3.0V Version
(*1): The output voltage excludes under 2.1V.
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.
NJM2885
!
TEST CIRCUIT
A
V
IN
I
IN
V
IN
V
OUT
2.2
µ
F
*2
(ceramic)
0.33
µ
F
NJM2885
GND
I
OUT
V
V
OUT
*2
1.7V<Vo
≤
2.6V version: Co=4.7
µ
F(ceramic)
Vo
≤
1.7V version: 10
µ
F(ceramic)
!
POWER DISSIPATION VS. AMBIENT TEMPERATURE
10
Power Dissipation P
D
(W)
NJU2885DL1
(Topr=-40~+85°C,Tj=125°C,P
D
=8W(T
C
=25°C),P
D
=0.8W(Ta≤25°
C))
∞
Heat Sink
8
θ
HS
=5°C/W
6
θ
HS
=10°C/W
4
θ
HS
=20°C/W
2
Without Heat Sink
0
-50
-25
0
25
50
Ambient Temperature Ta(°C)
75
100
NJM2885
!
ELECTRICAL CHARACTERISTICS
NJM2885_3.0V
Output Voltage vs. Input Voltage
@:Ta=25 C
Co=2.2µF
(Ceramic)
3.1
3
o
3.2
4
NJM2885_3.0V
Output Voltage vs. Output Current
@:Ta=25
o
C
V
IN
=4.0V
Co=2.2µF
(Ceramic)
3.5
Output Voltage : Vo(V)
Io=0A
3
Output Voltage : Vo(V)
3.3
3.4
2.5
2
2.9
Io=100mA
1.5
1
2.8
Io=300mA
0.5
2.7
2.7
0
2.8
2.9
3
3.1
3.2
0
200
400
600
800
1000
Input Voltage : V
IN
(V)
Output Current : Io(mA)
NJM2885_3.0V
Ground Pin Current v.s. Output Current
30
0.35
@:Ta=25
o
C
V
IN
=4.0V
Co=2.2µF
(Ceramic)
o
NJM2885_3.0V
Dropout Voltage vs. Output Current
@:Ta=25 C
Co=2.2µF
(Ceramic)
25
0.3
Ground Pin Current : I
GND
(mA)
20
Dropout Voltage:dV
I-O
(V)
0.25
0.2
15
0.15
10
0.1
5
0.05
0
0
100
200
300
400
500
600
700
0
0
100
200
300
400
500
600
700
Output Current : I
O
(mA)
Output Current:Io(mA)
100
NJM2885_3.0V
Output Noise Voltage vs. Output Current
@:Ta=25
o
C
V
IN
=4.0V
LPF:80kHz
NJM2885_3.0V
Equivalent Serise Resistance vs. Output Current
100
@:Ta=25 C
V
IN
=4.0V
Co=2.2µF
(Ceramic)
o
Equivalent Serise Resistance : ESR(Ω )
Ω
µ
Output Noise Voltage : Vn( Vrms)
80
10
Co=2.2µF
(Ceramic)
60
1
STABLE REGION
40
20
Co=4.7µF
(Ceramic)
0.1
0
0.001
0.01
0.1
1
10
100
1000
0.02
0.001
0.01
0.1
1
10
100
10
3
Output Current : Io(mA)
Output Current : Io(mA)
NJM2885
!
ELECTRICAL CHARACTERISTICS
NJM2885_3.0V
Ripple Rejection Ratio v.s. Frequency
100
Io=0mA
100
NJM2885_3.0V
Ripple Rejection vs. Output Current
90
90
f=1kHz
Ripple Rejection Ratio : RR (dB)
Ripple Rejection : RR (dB)
80
80
70
Io=30mA
Io=10mA
70
f=10kHz
60
60
50
50
40
@:Ta=25 C
V
IN
=4.0V
ein=200mVrms
Co=2.2µF
(Ceramic)
10
100
1k
10k
100k
o
40
@:Ta=25 C
V
IN
=4.0V
ein=200mVrms
Co=2.2µF
(Ceramic)
0.01
0.1
1
10
100
1000
o
30
30
20
20
0.001
Frequency : f (Hz)
Output Current : Io(mA)
0.4
NJM2885_3.0V
Dropout Voltage vs. Temperature
300
NJM2885_3.0V
Quiescent Current v.s. Input Voltage
@:V
IN
=4V
Output is open.
Co=2.2µF
(Ceramic)
0.35
250
0.3
Quiescent Current : I
Q
(
µ
A)
@:Io=300mA
Co=2.2µF
(Ceramic)
Dropout Voltage : dV (V)
I-O
0.25
200
0.2
150
0.15
100
0.1
50
0.05
0
-50
0
50
100
o
0
150
-50
0
50
100
o
150
Temperature :Ta [ C]
Temperature :Ta [ C]
NJM2885_3.0V
Output Voltage v.s. Temperature
4
3.5
3
Output Voltage :Vo [V]
2.5
2
1.5
1
0.5
@:VIN=4.0V
Io=30mA
CL=2.2uF(Ceramic)
-50
0
50
100
o
0
150
200
Temperature :Ta [ C]
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
