NJM2877 Data Sheet

NJM2877
Low Dropout Voltage Regulator
GENERAL DESCRIPTION
The NJM2877 is a 150mA output low dropout voltage regulator
with ON/OFF control.
Advanced Bipolar technology achieves low noise, high ripple
rejection, High accuracy and low quiescent current.
Package line-up is very small package: SC88A and standard
package: SOT23-5.
Small packaging and 0.47µF small decoupling capacitor make the
NJM2877 suitable for space conscious applications.
PACKAGE OUTLINE
NJM2877F
NJM2877F3
FEATURES
High Ripple Rejection
75dB typ. (f=1kHz Vo=3V version)
Output Noise Voltage
Vno=30µVrms typ. (Cp=0.01µF)
Output capacitor with 0.47µF ceramic capacitor (Vo≥2.7V Version)
Output Current
Io(max.)=150mA
High Precision Output
Vo ±1.0%
Low Dropout Voltage
0.10V typ. (Io=60mA)
ON/OFF Control
(Active High)
Internal Thermal Overload Protection
Internal Over Current Protection
Bipolar Technology
Package Outline
SC88A, SOT23-5
PIN CONFIGURATION
5
4
1 2 3
1.
2.
3.
4.
5.
5
CONTROL
GND
NOISE BYPASS
VOUT
VIN
4
1 2 3
1.
2.
3.
4.
5.
CONTROL
GND
NOISE BYPASS
VOUT
VIN
NJM2877F3
NJM2877F
EQUIVALENT CIRCUIT
VIN
VOUT
Control
Thermal
Protection
Bandgap
Reference
Noise
Bypass
GND
Ver.2011-04-01
-1-
NJM2877
OUTPUT VOLTAGE RANK LIST
SC88A Package
Device Name
Vout
Device Name
Vout
NJM2877F3 -15
NJM2877F3 -18
NJM2877F3 -21
NJM2877F3 -22
NJM2877F3 -23
NJM2877F3 -24
NJM2877F3 -25
NJM2877F3 -255
NJM2877F3 -26
NJM2877F3 -27
NJM2877F3 -28
NJM2877F3 -285
NJM2877F3 -29
NJM2877F3 -03
NJM2877F3 -31
NJM2877F3 -32
1.5V
1.8V
2.1V
2.2V
2.3V
2.4V
2.5V
2.55V
2.6V
2.7V
2.8V
2.85V
2.9V
3.0V
3.1V
3.2V
NJM2877F3 -33
NJM2877F3 -34
NJM2877F3 -345
NJM2877F3 -35
NJM2877F3 -355
NJM2877F3 -36
NJM2877F3 -38
NJM2877F3 -04
NJM2877F3 -42
NJM2877F3 -45
NJM2877F3 -46
NJM2877F3 -47
NJM2877F3 -48
NJM2877F3 -05
3.3V
3.4V
3.45V
3.5V
3.55V
3.6V
3.8V
4.0V
4.2V
4.5V
4.6V
4.7V
4.8V
5.0V
SOT23-5 Package
-2-
Device Name
Vout
NJM2877F15
NJM2877F28
NJM2877F03
NJM2877F33
NJM2877F05
1.5V
2.8V
3.0V
3.3V
5.0V
Ver.2011-04-01
NJM2877
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
VIN
Control Voltage
VCONT
RATINGS
+10
+10(*1)
SC88A
Power Dissipation
(Ta=25°C)
UNIT
V
V
PD
SOT23-5
250(*2)
350(*2)
200(*3)
mW
−40 ∼ +85
°C
−40 ∼ +125
°C
(*1): When input voltage is less than +10V, the absolute maximum control voltage is equal to the input voltage.
(*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3 × 76.2 × 1.6mm: 2Layers FR-4)
(*3): Device itself.
Operating Temperature
Storage Temperature
Topr
Tstg
Operating voltage
VIN=+2.3 ∼ +9V (In case of Vo<2.1V version)
ELECTRICAL CHARACTERISTICS
(VIN=Vo+1V, CIN=0.1µF, Co=0.47µF: Vo≥2.7V (Co=1.0µF : 1.8V<Vo≤2.6V, Co=2.2µF : Vo≤1.8V), Cp=0.01µF, Ta=25°C)
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
-1.0%
−
+1.0%
V
−
−
9
V
Io=0mA, except Icont
−
120
180
µA
VCONT=0V
−
−
100
nA
150
−
−
−
0.10
0.03
mA
%/V
%/mA
−
200
−
−
0.10
0.18
V
−
75
−
dB
Ta=0 ∼ +85°C, Io=10mA
−
± 50
−
ppm/°C
VNO
f=10Hz∼80kHz, Io=10mA, Vo=3V Version
−
30
−
µVrms
ICONT
VCONT=1.6V
−
3
12
µA
1.6
−
−
−
0.6
V
V
Output Voltage
Vo
Input Voltage
VIN
Quiescent Current
Quiescent Current
at Control OFF
Output Current
Line Regulation
Load Regulation
Dropout Voltage (*4)
IQ
Ripple Rejection
Average Temperature
Coefficient of Output
Voltage
Output Noise Voltage
Control Current
Control Voltage for ON-state
Control Voltage for OFF-state
IQ(OFF)
Io
∆Vo/∆VIN
∆Vo/∆Io
∆VI−O
RR
∆Vo/∆Ta
VCONT(ON)
VCONT(OFF)
TEST CONDITION
Io=30mA
Vo - 0.3V
VIN=Vo+1V ∼ Vo+6V, Io=30mA
Io=0 ∼ 100mA
Io=60mA
ein=200mVrms, f=1kHz, Io=10mA,
Vo=3V version
−
(*4): 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.
Ver.2011-04-01
-3-
NJM2877
TEST CIRCUIT
A
IIN
VIN
VIN
NJM2877
0.1µF
A
V
VOUT
ICONT
IOUT
*4
0.47µF
(Ceramic)
V
VOUT
NOISE
BYPASS
CONTROL
Cp=0.01µF
GND
VCONT
*4: 1.8V<Vo≤2.6V version: Co=1.0µF(Ceramic)
Vo≤1.8V version: Co=2.2µF(Ceramic)
TYPICAL APPLICATIONS
1 In the case where ON/OFF Control is not required:
VIN
VIN
0.1µF
VOUT
NJM2877
VOUT
0.47µF
*5
R
CONTROL
GND
NOISE
BYPASS
Cp=0.01µF
*5: 1.8V<Vo≤2.6V version: Co=1.0µF
Vo≤1.8V version: Co=2.2µF
Connect control terminal to VIN terminal
-4-
Ver.2011-04-01
NJM2877
2 In use of ON/OFF CONTROL:
VIN
VIN
VOUT
NJM2877
0.1µF
VOUT
0.47µF
*5
R
CONTROL
GND
NOISE
BYPASS
Cp=0.01µF
*5 : 1.8V<Vo≤2.6V version : Co=1.0µF
Vo≤1.8V version : Co=2.2µF
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.
Input Capacitance CIN
Input Capacitance CIN is required to prevent oscillation and reduce power supply ripple for applications with high
power supply impedance or a long power supply line.
Use the CIN value of 0.1µF greater to avoid the problem.
CIN should connect between GND and VIN as short as possible.
In the case of using a resistance "R" between VIN and control.
The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance
"R" is inserted between VIN and the control terminal.
The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by ICONT and the
resistance "R". The ICONT 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 VCONT (ON) over the required temperature range.
Ver.2011-04-01
-5-
NJM2877
Output Capacitance Co
Output capacitor (Co) is required for a phase compensation of the internal error amplifier. The
capacitance and the equivalent series resistance (ESR) influences stability of the regulator.
This product is designed to work with a low ESR capacitor for the Co; however, use of recommended
capacitance or greater value is essential for stable operation.
Use of a smaller Co may cause excess output noise or oscillation of the regulator due to lack of the
phase compensation.
Therefore, use Co with the recommended capacitance or greater value and connect between Vo
terminal and GND terminal with minimal wiring. The recommended capacitance depends on the output
voltage. Low voltage regulator requires greater value of the Co. Thus, check the recommended
capacitance for each output voltage.
Use of a greater Co reduces output noise and ripple output, and also improves transient response of
the output voltage against rapid load change.
-6-
Ver.2011-04-01
NJM2877
POWER DISSIPATION vs. AMBIENT TEMPERATURE (SC-88A)
NJM2877F3 Power Dissipation
(Topr=-40~+85°C,Tj=125°C)
Power Dissipation P D(mW)
500
400
300
On Board(114.3×76.2×1.6mm, FR-4)
200
100
0
-50
-25
0
25
50
75
100
75
100
Ambient Temperature Ta(°C)
NJM2877F Power Dissipation
(Topr=-40~+85°C,Tj=125°C)
Power Dissipation PD(mW)
500
400
On Board(114.3×76.2×1.6mm, FR-4)
300
device itself
200
100
0
-50
-25
0
25
50
Ambient Temperature Ta(°C)
Ver.2011-04-01
-7-
NJM2877
TYPICAL CHARACTERISTICS
NJM2877_3.0V
Output Voltage vs. Input Voltage
3.2
NJM2877_3.0V
Output Voltage vs. Output Current
4
o
@:Ta=25 C
Co=0.47µF(Ceramic)
@:Ta=25 oC
VIN=4.0V
Co=0.47υF(Ceramic)
3.5
3.1
Io=0A
Output Voltage : Vo(V)
Output Voltage : Vo(V)
3
3
2.9
Io=100mA
Io=30mA
2.8
2.5
2
1.5
1
0.5
2.7
2.7
2.8
2.9
3
3.1
3.2
3.3
0
3.4
0
50
NJM2877_3.0V
Ground Pin Current v.s. Output Current
20
150
200
250
300
NJM2877_3.0V
Dropout Voltage vs. Output Current
0.3
o
o
@:Ta=25 C
Co=0.47µF(Ceramic)
@:Ta=25 C
V IN=4.0V
Co=0.47µF(Ceramic)
0.25
15
Dropout Voltage:dVI-O (V)
Ground Pin Current : GI ND (mA)
100
Output Current : Io(mA)
Input Voltage : VIN(V)
10
5
0.2
0.15
0.1
0.05
0
0
0
50
100
150
0
200
50
Output Current : IO(mA)
NJM2877_3.0V
Control Current vs. Control Voltage
30
15
Rc=100kΩ
10
200
Rc=0Ω
3
Output Voltage : Vo(V)
(µA)
Cont
Control Current : I
3.5
20
Rc=0Ω
150
NJM2877_3.0V
Output Voltage vs. Control Voltage
4
@:Ta=25 oC
V IN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
Io=30mA
25
100
Output Current:Io(mA)
Rc=50kΩ
Rc=50kΩ
2.5
2
Rc=100k Ω
1.5
1
o
@:Ta=25 C
VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
Io=30mA
5
0.5
0
0
0.5
1
1.5
2
2.5
Control Voltage : V
3
(V)
Cont
-8-
3.5
4
0
0
0.5
1
1.5
2
Control Voltage : V
2.5
3
(V)
Cont
Ver.2011-04-01
NJM2877
TYPICAL CHARACTERISTICS
NJM2877_3.0V
Load Regulation vs. Output Current
0
NJM2877_3.0V
Peak Output Current vs. Input Voltage
300
250
Peak Output Current : IoMAX(mA)
Load Regulation : dVo/dIo(mV)
-10
-20
-30
-40
-50
@:Ta=25 oC
V IN=4.0V
Co=0.47µF(Ceramic)
0
50
100
150
200
150
100
50
@:Ta=25oC
Co=0.47µF(Ceramic)
0
200
4
5
6
Output Current : Io(mA)
NJM2877_3.0V
Quiescent Current v.s. Input Voltage
2000
Output Noise Voltage : Vn(µVrms)
Quiescent Current : IQ (µA)
1000
500
150
100
50
6
8
10
1p
Input Voltage : VIN(V)
Output Noise Voltage :Vn (nV/√ Hz)
Output Noise Voltage :Vn (µVrms)
@:Ta=25 C
VIN=4.0V
Co=0.47µF
Cp=0.01µF
LPF:80kHz
60
40
20
0
0.001
0.01
0.1
1
Output Current :Io [mA]
Ver.2011-04-01
100p
1000p
0.01µ
0.1µ
NJM2877_3.0V
Output Noise Voltage vs. Frequency
1000
o
80
10p
Noise Bypass Capacitor : Cp(F)
NJM2877_3.0V
Output Noise Voltage vs. Output Current
100
10
200
0
0
4
9
@:Ta=25 oC
VIN=4.0V
Co=0.47µF(Ceramic)
Io=10mA
250
1500
2
8
NJM2877_3.0V
Output Noise Voltage vs. Noise Bypass Capacitor
300
@:Ta=25oC
Output is open.
Co=0.47µF(Ceramic)
Including Icont
0
7
Input Voltage : VIN(V)
10
100
800
@:Ta=25oC
V IN=4.0V
Co=0.47µF
Cp=0.01µF
Io=10mA
600
400
200
0
100
1000
104
105
Frequency :f [Hz]
-9-
NJM2877
TYPICAL CHARACTERISTICS
NJM2877_3.0V
Ripple Rejection Ratio v.s. Frequency
100
@:Ta=25oC
VIN=4.0V
ein=200mVrms
Co=0.47µF(Ceramic)
90
90
Io=10mA
80
f=1kHz
80
Io=0mA
Ripple Rejection : RR (dB)
Ripple Rejection Ratio : RR (dB)
NJM2877_3.0V
Ripple Rejection vs. Output Current
100
70
60
Io=30mA
50
40
70
f=10kHz
60
50
40
o
30
20
@:Ta=25 C
V IN=4.0V
ein=200mVrms
Co=0.47µF(Ceramic)
10
10
30
1k
1000
100
100
20
0.001
5
100k
10
4
10k
10
Frequency : f (Hz)
0.01
0.1
1
10
100
Output Current : Io(mA)
NJM2877_3.0V
Equivalent Serise Resistance vs. Output Current
100
Equivalent Serise Resistance : ESR(Ω )
@:Ta=25 oC
V IN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
10
STABLE REGION
1
0.1
0.02
0.001
0.01
0.1
1
10
100
3
10
Output Current : Io(mA)
0.3
NJM2877_3.0V
Dropout Voltage v.s. Temperature
NJM2877_3.0V
Output Voltage v.s. Temperature
3.1
@:Io=60mA
Co=0.47µF(Ceramic)
Cp=0.01µF
@:VIN=4.0V
Io=30mA
Co=0.47µF(Ceramic)
Cp=0.01µF
3.05
Output Voltage :Vo [V]
Dropout Voltage :dVi-o [V]
0.25
0.2
0.15
0.1
3
2.95
0.05
0
2.9
-50
0
50
100
o
Temperature :Ta [ C]
- 10 -
150
-50
0
50
100
150
o
Temperature :Ta [ C]
Ver.2011-04-01
NJM2877
TYPICAL CHARACTERISTICS
NJM2877_3.0V
Control Voltage v.s. Temperature
@:VIN=4.0V
Output is open.
Co=0.47µF(Ceramic)
Cp=0.01µF
1.5
Control Current : ICONT [ µA]
Control Voltage :Vcont-off [V]
2
NJM2877_3.0V
Control Current vs. Temperature
20
1
0.5
@:Ta=25oC
V IN=4.0V
Vcont=1.6V
Co=0.47µF(Ceramic)
Cp=0.1µF(Ceramic)
15
10
5
0
0
-50
0
50
100
-50
150
0
o
300
NJM2877_3.0V
Quiescent Current v.s. Temperature
100
150
NJM2877_3.0V
Short Circuit Current v.s. Temperature
200
@:V IN=4.0V
Output is short to ground.
Co=0.47µF(Ceramic)
Cp=0.01µF
@:VIN=4.0V
Output is open.
Co=0.47µF(Ceramic)
Cp=0.01µF
Short Circuit Current :Isc [mA]
250
Quiescent Current : Iq [µA]
50
Temperature :Ta [oC]
Temperature :Ta [ C]
200
150
100
150
100
50
50
0
0
-50
0
50
100
-50
150
0
@:VIN=4.0-9.0V
Io=30mA
Co=0.47µF(Ceramic)
Cp=0.01µF
0
-0.1
@:V IN=4.0V
Io=0-100mA
Co=0.47µF(Ceramic)
Cp=0.01µF
0.025
0.02
0.015
0.01
0.005
0
0
50
100
o
Temperature :Ta [ C]
Ver.2011-04-01
150
NJM2877_3.0V
Load Regulation v.s. Temperature
0.03
Load Regulation :dVo/dIo [%/mA]
Line Regulation :dVo/dVin [%/V]
NJM2877_3.0V
Line Regulation v.s. Temperature
0.1
-0.2
-50
100
Temperature :Ta [ C]
Temperature :Ta [ C]
0.2
50
o
o
150
-50
0
50
100
150
o
Temperature :Ta [ C]
- 11 -
NJM2877
TYPICAL CHARACTERISTICS
NJM2877_3.0V
Output Peak Current v.s. Temperature
NJM2877_3.0V
Output Voltage v.s. Tem perature
3.5
@:VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
3
225
2.5
Output Voltage :Vo [V]
150
75
2
1.5
1
@:VIN=4.0V
Io=30mA
Co=0.47µF(Ceramic)
Cp=0.01µF
0.5
0
0
0
50
100
150
-50
0
50
o
NJM2877_3.0V
ON/OFF Transient Response without Load
NJM2877_3.0V
ON/OFF Transient Response
15
15
10
5
4
0
Output Voltage
3
-5
2
-10
1
0
-1
1
2
3
Time : t [S]
4
Control Voltage
5
5
0
Output Voltage
3
-5
2
-10
-15
1
-15
-20
0
-20
-25
-1
5
-25
0
4
8
12
Time : t [mS]
16
20
NJM2877_3.0V
Input Transient Response
150
3.1
7
3.08
100
3.08
6
50
3.04
0
3.02
-50
Output Voltage
3
-100
2.98
o
@:Ta=25 C
VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
2.96
2.94
0
40
80
120
Time : t [ µS]
160
-150
3.06
Output Voltage : Vo [V]
3.06
Output Current : Io [mA]
3.1
Output Current
Output Voltage : Vo [V]
10
4
NJM2877_3.0V
Load Transient Response
- 12 -
@:Ta=25 C
VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
Io=30mA
6
Output Voltage : Vo [V]
Control Voltage
Control Voltage : Vo [V]
Output Voltage : Vo [V]
o
@:Ta=25 C
VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
Io=0mA
6
200
7
o
0
150
o
Temperature :Ta [ C]
7
5
100
Temperature :Ta [ C]
Control Voltage : Vo [V]
-50
5
Input Voltage
3.04
4
3.02
3
3
2
Output Voltage
o
@:Ta=25 C
VIN=4.0V
Co=0.47µF(Ceramic)
Cp=0.01µF
Io=30mA
2.98
-200
2.96
-250
200
2.94
Input Voltage : VIN [V]
Output Peak Current :Ipeak [mA]
300
1
0
-1
0
40
80
120
Time : t [ µS]
160
200
Ver.2011-04-01
NJM2877
[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.
Ver.2011-04-01
- 13 -