Download NJM2805 Data Sheet

NJM2805
Low Dropout Voltage Regulator with Reset
„ GENERAL DISCRIPTION
The NJM2805 is a low dropout voltage regulator with reset
function.
It provides up to 300mA of logic supply, and the reset function
monitors output voltage of the regulator with 1% accuracy.
It is suitable for local power supply and reset for small micro
controller and other logic chips.
„ FEATURES
z Output Voltage Accuracy
Vo ±1.0%
z Reset Voltage Accuracy
VRT ±1.0%
z Adjust reset delay time with external capacitor.
z Ripple Rejection
75dB typ. (f =1kHz)
z Output Voltage Monitor type
z Open Collector Output
z Internal Short Circuit Current Limit
z Internal Thermal Overload Protection
z Bipolar Technology
z Package Outline
SOT-89 -5
„ PACKAGE OUTLINE
NJM2805U1
„ PIN CONFIGURATION
5
2
4
1
2
3
PIN FUNCTION
1.VOUT
2.GND
3.Cd
4.VOR
5.VIN
NJM2805U1
„ OUTPUT VOLTAGE/ DETECTION VOLTAGE
Device Name
VOUT
VDET
NJM2805U1-2923
2.9V
2.3V
NJM2805U1-3329
3.3V
2.9V
NJM2805U1-0543
5.0V
4.3V
„ EQUIVALENT CIRCUIT
VIN
VOUT
VOR
Bandgap
Reference
Thermal
Protection
GND
Cd
Ver.2006-02-21
-1-
NJM2805
„ ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
(Ta=25°C)
UNIT
Input Voltage
VIN
+14
V
Power Dissipation
PD
350
mW
Operating Temperature
Topr
-40 ∼ +85
°C
Storage Temperature
Tstg
-40 ∼ +125
°C
„ ELECTRICAL CHARACTERISTICS
(VIN=Vo+1V, CIN=0.1µF, Co=1µF (Co=2.2µF: Vo≤2.6V) Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Quiescent Current
Regulator Block
IQ
Io=0mA
−
250
350
µA
Output Voltage
Vo
Io=30mA
-1.0%
+1.0%
V
Output Current
Io
Vo-0.3V
300
−
400
Line Regulation
∆Vo/∆VIN
VIN=Vo+1V ∼ Vo+6V, Io=30mA
−
−
−
0.10
%/V
Load Regulation
∆Vo/∆Io
−
%/mA
∆VI_O
−
−
0.10
0.03
Dropout Voltage
0.18
V
Ripple Rejection
RR
Io=0 ∼ 300mA
Io=100mA
ein=200mVrms, f=1kHz, Io=10mA,
Vo=3V Version
−
75
−
dB
Ta=0 ∼ 85°C, Io=10mA
−
±50
−
ppm/°C
VNO
f=10Hz ∼ 80kHz, Io=10mA,
Vo=3V Version
−
45
−
µVrms
Voltage Detection
VRT
VIN=H→L
-1.0%
−
+1.0%
V
Hysteresis Voltage
VRTH
VIN=H→L→H
VRT
×3%
VRT
×5%
VRT
×8%
V
Low Level Output Voltage
Output Leak Current
RORL
IORH
VIN=VRT-0.5V, RL=100kΩ
VIN= VRT+0.5V
100
−
300
0.1
On time Output Current
IORL
VIN=VRT-0.5V, RL=0Ω
−
−
5
VIN=(VRT-0.5V)→ (VRT+0.5V), Cd=0.1µF
9
−
10
−
11
VORL=0.4V
−
0.9
−
Output Voltage
Temperature Coefficient
Output Noise Voltage
∆Vo/∆T
mA
Reset Block
Reset Output Delay Time
Operation Voltage Limit
td
VOPL
mV
µA
mA
ms
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.2006-02-21
NJM2805
„ TIMING CHART
VIN[V]
VO
t
VO[V]
VO
VRTH
VRT
t
VOR[V]
VO
td
td
td
t
∗ When the pull-up of the VOR is carried out to VIN through resistance.
Ver.2006-02-21
-3-
NJM2805
„ TEST CIRCUIT
IQ
VIN
VO
IOR
NJM2805
RL
0.1µF
Cd
VIN
V
VOR
1.0µF*1 IOUT
(Ceramic)
GND
V
0.1µF
VOUT
VOR
*1 Vo≤2.6V: Co=2.2µF (Ceramic)
„ TYPICAL APPLICATIONS
VIN
VIN
VO
NJM2805
100kΩ
0.1µF
Cd
VOUT
VOR
1.0µF*2
VOR
GND
0.1µF
*2 Vo≤2.6V: Co=2.2µF
-4-
Ver.2006-02-21
NJM2805
„ ELECTRICAL CHARISTICS
NJM2805_Vo=5.0V
Output Voltage vs. Output Current
6
5
@:Ta=25oC
Co=1µF(Ceramic)
Cd=0.1µF
0.25
Dropout Voltage:dVI-O (V)
Output Voltage :Vo [V]
NJM2805_5.0V
Dropout Voltage vs. Output Current
0.3
4
3
2
o
@:Ta=25 C
V IN=6.0V
Co=1.0µF(Ceramic)
1
0.2
0.15
0.1
0.05
0
0
0
100
200
300
400
500
600
0
100
200
Output Current :Io [mA]
NJM2805_5.0V
Output Noise Voltage vs. Output Current
100
20
o
Ground Pin Current : GI ND (mA)
60
Co=2.2µF(Ceramic)
40
20
0.01
0.1
1
500
@:Ta=25 oC
V IN=6.0V
Co=1µF(Ceramic)
Cd=0.1µF
Co=1.0µF(Ceramic)
80
0
0.001
10
15
10
5
0
100
0
50
100
150
200
250
300
Output Current : Io(mA)
Output Current : IO(mA)
NJM2805_5.0V
Quiescent Current v.s. Input Voltage
NJM2805_5.0V
Load Regulation vs. Output Current
0
2500
Load Regulation : dVo/dIo(mV)
1000
500
400
@:Ta=25 C
V IN=6.0V
Co=1µF(Ceramic)
Cd=0.1µF
-10
2000
1500
350
o
o
@:Ta=25 C
Output is open.
Co=1µF(Ceramic)
Quiescent Current : IQ (µ
µ A)
400
NJM2805_5.0V
Ground Pin Current v.s. Output Current
@:Ta=25 C
VIN=6.0V
LPF:80kHz
Output Noise Voltage : Vn(µ Vrms)
300
Output Current:Io(mA)
-20
-30
-40
-50
0
0
5
10
Input Voltage : VIN(V)
Ver.2006-02-21
15
0
100
200
300
400
500
Output Current : Io(mA)
-5-
NJM2805
„ ELECTRICAL CHARISTICS
NJM2805_5.0V
Ripple Rejection Ratio v.s. Frequency
NJM2805_5.0V
Ripple Rejection vs. Output Current
100
100
70
60
Io=30mA
50
40
30
20
f=1kHz
80
Io=10mA
80
Ripple Rejection : RR (dB)
Ripple Rejection Ratio : RR (dB)
90
Io=0mA
90
70
60
50
f=10kHz
40
o
@:Ta=25 oC
VIN=6.0V
ein=200mVrms
Co=1.0µF(Ceramic)
10
30
1k
100
@:Ta=25 C
VIN=6.0V
ein=200mVrms
Co=1.0µF(Ceramic)
20
0.001
100k
10k
0.01
0.1
1
10
NJM2805_5.0V
Equivalent Serise Resistance vs. Output Current
100
NJM2805_5.0V/4.3V
Dropout Voltage v.s. Temperature
0.3
o
@:VIN=6.0V
Io=100mA
Co=1µF(Ceramic)
0.25
10
Dropout Voltage:dVI-O (V)
Equivalent Serise Resistance : ESR( Ω )
@:Ta=25 C
Co=1.0µF(Ceramic)
STABLE REGION
1
0.1
0.2
0.15
0.1
0.05
0.02
0.001
0.01
0.1
1
10
0
100
-50
0
100
ON Output Current : IORL(mA)
0.075
ORH
(µ A)
VIN=4.8V
Co=1µF
Cd=0.1µF
RL=100k Ω
Output Leak Current : I
100
150
o
NJM2805_5.0V/4.3V
Output Leak Current v.s Temperature
0.1
50
Temperature : Ta ( C)
Output Current : Io(mA)
0.05
0.025
NJM2805_5.0V/4.3V
ON Output Current v.s Temperature
VIN=3.8V
Co=1µF
Cd=0.1µF
RL=0Ω
75
50
25
0
0
-50
0
50
100
o
Temperature : Ta( C)
-6-
100
Output Current : Io(mA)
Frequency : f (Hz)
150
-50
0
50
100
150
o
Temperature : Ta( C)
Ver.2006-02-21
NJM2805
„ ELECTRICAL CHARISTICS
NJM2805_5.0V/4.3V
Short Circuit Current v.s. Temperature
400
400
350
350
300
300
Short Circuit Current : SI C (mA)
Quiescent Current : IQ (µ A)
NJM2805_5.0V/4.3V
Quiescent Current v.s. Temperature
250
200
150
100
@:VIN=6.0V
Output is open.
C L=1µF(Ceramic)
50
250
200
150
100
50
0
0
-50
0
50
100
150
-50
o
0
50
Temperature : Ta ( C)
NJM2805_5.0V/4.3V
Line Regulation v.s. Temperature
NJM2805_5.0V/4.3V
Load Regulation v.s. Temperature
150
0.03
@:dVIN=6.0-11.0V
I o=30mA
Co=1µF(Ceramic)
@:VIN=6.0V
I o=0-300mA
Co=1µF(Ceramic)
Load Regulation : dVo/dIo (%/mA)
0.025
0.05
0
-0.05
0.02
0.015
0.01
0.005
-0.1
0
-50
0
50
100
150
-50
0
o
50
100
150
o
Temperature : Ta ( C)
Temperature : Ta ( C)
NJM2805_5.0V/4.3V
Reset Output Delay Time v.s Temperature
NJM2805_5.0V/4.3V
Output Voltage v.s Temperature
5.2
20
VIN=3.8V->4.8V
Co=1µF
Cd=0.1µF
VIN=6.0V
Io=30mA
Co=1µF
5.15
5.1
15
Output Votage:Vo(V)
Reset Output Delay Time:td(ms)
100
o
Temperature : Ta ( C)
0.1
Line Regulation : dVo/dIo (%/V)
@:V IN=6.0V
Output is short to ground.
C O=1µF(Ceramic)
10
5.05
5
4.95
4.9
5
4.85
4.8
0
-50
0
50
100
o
Temperature : Ta ( C)
Ver.2006-02-21
150
-50
0
50
100
150
o
Temperature : Ta ( C)
-7-
NJM2805
„ ELECTRICAL CHARISTICS
NJM2805_5.0V/4.3V
Operation Voltage Limit v.s Temperature
1.5
Low Level Output Voltage : VORL(mV)
VORL =0.4V
Co=1µF
Cd=0.1µF
Operation Voltage Limit : VOPL(V)
NJM2805_5.0V/4.3V
Low Level Voltage v.s Temperature
50
1
0.5
0
VIN=3.8V
Co=1µF
Cd=0.1µF
RL=100kΩ
37.5
25
12.5
0
-50
0
50
100
150
-50
o
0
50
100
Temperature : Ta ( C)
NJM2805_5.0V/4.3V
Voltage Detection v.s Temperature
NJM2805_5.0V/4.3V
Hysteresis Voltage v.s Temperature
4.5
400
VIN=H->L->H
Co=1mF
Cd=0.1mF
4.4
Hysteresis Voltage : VRT(mV)
Voltage Detection : VRT(V)
VIN=H->L
Co=1µF
Cd=0.1µF
4.3
4.2
4.1
300
200
100
0
-50
0
50
100
o
Temperature : Ta ( C)
-8-
150
o
Temperature : Ta ( C)
150
-50
0
50
100
150
o
Temperature : Ta ( C)
Ver.2006-02-21
NJM2805
[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.2006-02-21
-9-