R1112N441A [RICOH]
Fixed Positive LDO Regulator, 4.4V, 0.26V Dropout, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN;型号: | R1112N441A |
厂家: | RICOH ELECTRONICS DEVICES DIVISION |
描述: | Fixed Positive LDO Regulator, 4.4V, 0.26V Dropout, CMOS, PDSO5, MINI, PLASTIC, SOT-23, 5 PIN 光电二极管 |
文件: | 总22页 (文件大小:294K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
'2000.3.13
LOW NOISE 150mA LDO REGULATOR
R1112N SERIES
n OUTLINE
The R1112N Series are voltage regulator ICs with high output voltage accuracy, extremely low supply current, low ON-
resistance, and high ripple rejection by CMOS process. Each of these voltage regulator ICs consists of a voltage reference unit,
an error amplifier, resistors, a current limit circuit, and a chip enable circuit.
These ICs perform with low dropout voltage and a chip enable function. The line transient response and load transient
response of the R1112N Series are excellent, thus these ICs are very suitable for the power supply for hand-held
communication equipment.
The output voltage of these ICs is fixed with high accuracy. Since the package for these ICs are SOT-23-5 (Mini-mold)
package , high density mounting of the ICs on boards is possible.
n FEATURES
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Ultra-Low Supply Current......................................... TYP. 100mA
Standby Mode ........................................................... TYP. 0.1mA
Low Dropout Voltage ................................................ TYP. 0.19V(IOUT=100mA 3.0V Output type)
High Ripple Rejection............................................... TYP. 80dB(f=1kHz)
Low Temperature-Drift Coefficient of Output Voltage TYP. ±100ppm/°C
Excellent Line Regulation......................................... TYP. 0.05%/V
High Output Voltage Accuracy.................................. ±2.0%
Excellent Dynamic Response
Small Package ..........................................................SOT-23-5(Mini-mold)
Output Voltage...........................................................Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is
possible
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Built-in chip enable circuit ( 2 types; A: active low , B: active high)
Pin-out.......................................................................Similar to the LP2980/LP2985
Built-in fold-back protection circuit..........................TYP. 30mA (Current at short mode)
Ceramic capacitors recommended to be used with this IC
n APPLICATIONS
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Power source for cellular phones such as GSM, CDMA and various kind of PCSs.
Power source for electrical appliances such as cameras, VCRs and camcorders.
Power source for battery-powered equipment.
Rev. 1.10
- 1 -
n BLOCK DIAGRAM
R1112NXX1A
R1112NXX1B
1
5
1
5
V
DD
VOUT
V
DD
VOUT
Vref
Vref
Current Limit
Current Limit
CE
3
GND
2
CE
3
GND
2
Rev. 1.10
- 2 -
n SELECTION GUIDE
The output voltage, the active type, the packing type, and the taping type for the ICs can be selected at the user's request. The
selection can be made by designating the part number as shown below :
R1112XXX1X-XX
¬Part Number
• • • •
a
b c d
Code
Contents
Designation of Package Type :
N:SOT-23-5 (Mini-mold)
a
Setting Output Voltage (VOUT) :
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
Designation of Active Type :
A : active low type
B : active high type
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications ;TR type is the standard direction.)
b
c
d
n PIN CONFIGURATION
SOT-23-5
5
4
V
OUT
NC
CE
(mark side)
GND
V
DD
1
2
3
n PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
3
4
5
VDD
GND
Input Pin
Ground Pin
or CE
Chip Enable Pin
No Connection
Output pin
CE
NC
VOUT
Rev. 1.10
- 3 -
n ABSOLUTE MAXIMUM RATINGS
Item
Symbol
VIN
Rating
7.0
Unit
V
Input Voltage
Input Voltage(
or CE Pin)
VCE
-0.3 ~ VIN+0.3
-0.3 ~ VIN+0.3
200
V
CE
Output Voltage
Output Current
Power Dissipation
VOUT
IOUT
PD
V
mA
mW
°C
°C
250
Operating Temperature Range
Storage Temperature Range
Topt
Tstg
-40 ~ 85
-55 ~ 125
n ELECTRICAL CHARACTERISTICS
l
R1112NXX1A
Symbol
Topt=25°C
Item
Output Voltage
Output Current
Conditions
MIN.
TYP.
MAX.
VOUT
´1.02
Unit
VIN = Set VOUT+1V
1mA £ IOUT £ 30mA
VIN - VOUT = 1.0V
VIN = Set VOUT+1V
1mA £ IOUT £ 80mA
VOUT
´0.98
150
VOUT
IOUT
V
mA
mV
Load Regulation
Dropout Voltage
12
40
DVOUT/DIOUT
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
VDIF
ISS
Istandby
Supply Current
Supply Current (Standby)
VIN = Set VOUT+1V
VIN = VCE = Set VOUT+1V
100
0.1
170
1.0
mA
mA
Set VOUT+0.5V £ VIN £ 8V
IOUT = 30mA
f = 1kHz, Ripple 0.5Vp-p
VIN = Set VOUT+1V
Line Regulation
Ripple Rejection
0.05
80
0.20
%/V
DVOUT/DVIN
RR
VIN
dB
Input Voltage
2.0
6.0
V
IOUT = 30mA
-40°C £ Topt £ 85°C
VOUT = 0V
ppm
/°C
Output Voltage
Temperature Coefficient
Short Current Limit
±100
DVOUT/DT
Ilim
RPU
30
5
mA
Pull-up Resistance
Input Voltage “H”
Input Voltage “L”
2.5
1.5
0
10
VIN
CE
CE
CE
MW
V
V
VCEH
VCEL
0.25
Output Noise
BW=10Hz to 100kHz
30
en
mVrms
Rev. 1.10
- 4 -
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R1112NXX1B
Symbol
Topt=25°C
Item
Output Voltage
Output Current
Conditions
VIN = Set VOUT+1V
1mA £ IOUT £ 30mA
VIN - VOUT = 1.0V
VIN = Set VOUT+1V
1mA £ IOUT £ 80mA
MIN.
VOUT
´0.98
150
TYP.
MAX.
VOUT
´1.02
Unit
VOUT
IOUT
V
mA
mV
Load Regulation
12
40
DVOUT/DIOUT
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
VDIF
ISS
Dropout Voltage
Supply Current
VIN = Set VOUT+1V
VIN = Set VOUT+1V
VCE=GND
100
170
mA
Istandby
Supply Current (Standby)
0.1
1.0
mA
Set VOUT+0.5V £ VIN £ 8V
Line Regulation
Ripple Rejection
0.05
80
0.20
6.0
%/V
dB
DVOUT/DVIN
IOUT = 30mA
f = 1kHz, Ripple 0.5Vp-p
VIN = Set VOUT+1V
RR
VIN
Input Voltage
Output Voltage
2.0
V
ppm
/°C
mA
MW
V
IOUT = 30mA
-40°C £ Top t £ 85°C
VOUT = 0V
±100
DVOUT/DT
Temperature Coefficient
Short Current Limit
CE Pull-down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Ilim
RPD
VCEH
VCEL
30
5
2.5
1.5
0
10
VIN
0.25
V
Output Noise
BW=10Hz to 100kHz
30
mVrms
en
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ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25°C
Dropout Voltage
Output Voltage
DIF
V
(V)
OUT
V
(V)
Condition
TYP.
0.32
0.28
0.25
0.20
0.19
MAX.
0.55
0.47
0.35
0.29
0.26
1.5 £ VOUT £ 1.6
1.7 £ VOUT £ 1.8
1.9 £ VOUT £ 2.3
2.4 £ VOUT £ 2.7
2.8 £ VOUT £ 5.0
IOUT = 100mA
Rev. 1.10
- 5 -
n OPERATION
R1112NXX1A
R1112NXX1B
1
5
1
5
VDD
VOUT
VDD
VOUT
R1
R1
Vref
Vref
R2
R2
Current Limit
Current Limit
CE
GND
CE
3
GND
3
2
2
In these ICs, fluctuation of Output Voltage, VOUT is detected by Feed-back Registers R1, R2, and the result is compared with a
reference voltage by Error Amplifier, so that a constant voltage is output. A current limit circuit for protection at short mode
and a chip enable circuit are included.
Rev. 1.10
- 6 -
n TECHNICAL NOTES
When using these ICs, consider the following points:
Phase Compensation
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be
sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance).
We use Ceramic Capacitors for evaluation of these ICs.
Recommended Capacitors; GRM40X5R225K6.3 (Murata)
GRM40-034X5R335K6.3 (Murata)
GRM40-034X5R475K6.3 (Murata)
(Note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,
the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the
PCB.)
PCB Layout
Make VDD and GND line sufficient. When the impedance of these is high, it would be a cause of picking up the noise or
unstable operation. Connect a capacitor with a capacitance value of 2.2mF or more between VDD and GND pin as close as
possible.
Set external components, especially output capacitor as close as possible to the ICs and make wiring shortest.
Rev. 1.10
- 7 -
n TEST CIRCUITS
CE
3
V
DD
VOUT
R1112Nxx1B
R1112Nxx1B
Series
IN
OUT
1
5
Series
I
OUT
2.2µF
2
GND
2.2mF
2.2mF
Fig.1 Standard test Circuit
Fig.2 Supply Current Test Circuit
CE
3
CE
3
V
DD
VOUT
V
DD
VOUT
IN
OUT
IN
OUT
R1112Nxx1B
5
R1112Nxx1B
5
1
1
Series
Series
I
OUT
P. G
2
2
GND
GND
2.2mF
I1 I2
Fig.3 Ripple Rejection, Line Transient Response Test
Circuit
Fig.4 Load Transient Response Test Circuit
Rev. 1.10
- 8 -
n TYPICAL APPLICATION
CE
CE
R1112Nxx1A
Series
R1112Nxx1B
Series
IN
VDD
V
OUT
OUT
IN
VDD
V
OUT
OUT
GND
GND
Cap.
Cap.
Cap.
Cap.
(External Components)
Output Capacitor; Ceramic 2.2mF(Set Output Voltage in the range from 2.5 to 5.0V)
Ceramic 4.7mF (Set Output Voltage in the range from 1.5 to 2.5V)
Input Capacitor; Ceramic 2.2mF
Rev. 1.10
- 9 -
n TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
R11x2N151B
R11x2N201B
2.5
2
1.8
1.6
1.4
VIN=2.3V
VIN=2.0V
1.2
VIN=2.5V
VIN=3.0V
VIN=4.0V
VIN=2.5V
1.5
1
VIN=3.5V
1
0.8
0.6
0.4
0.2
0
0.5
0
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Iout[mA]
Output Current Iout[mA]
R11x2N301B
R11x2N401B
5
3.5
3
4
3
2
1
0
2.5
2
VIN=3.3V
VIN=3.5V
VIN=4.0V
VIN=5.0V
VIN=4.3V
VIN=4.5V
VIN=5.0V
VIN=6.0V
1.5
1
0.5
0
0
100
200
300
400
500
0
100
200
300
400
500
Output Current Iout[mA]
Output Current Iout[mA]
R11x2N501B
6
5
4
3
2
1
0
VIN=5.3V
VIN=5.5V
VIN=6.0V
VIN=7.0V
0
100
200
300
400
500
Output Current Iout[mA]
Rev. 1.10
- 10 -
2) Output Voltage vs. Input Voltage
R11x2N151B
1.600
R11x2N201B
2.100
2.000
1.900
1.800
1.700
1.600
1.500
1.500
1.400
1.300
1.200
1.100
1.000
Iout=1mA
Iout=30mA
Iout=50mA
Iout=1mA
Iout=30mA
Iout=50mA
1
2
3
4
5
6
7
1
2
3
4
5
6
7
Input Voltage VIN[V]
Input Voltage VIN[V]
R11x2N301B
R11x2N401B
3.100
3.000
2.900
2.800
2.700
2.600
2.500
4.500
4.000
3.500
3.000
2.500
Iout=1mA
Iout=30mA
Iout=50mA
Iout=1mA
Iout=30mA
Iout=50mA
2
3
4
5
6
7
2
3
4
5
6
7
Input Voltage VIN[V]
Input Voltage VIN[V]
R11x2N501B
5.500
5.000
4.500
4.000
3.500
3.000
2.500
Iout=1mA
Iout=30mA
Iout=50mA
2
3
4
5
6
7
Input Voltage VIN[V]
Rev. 1.10
- 11 -
3) Dropout Voltage vs. Output Current
R11x2N151B
R11x2N201B
0.600
0.600
0.500
0.400
0.300
0.200
0.100
0.000
0.500
0.400
0.300
0.200
0.100
0.000
Topt=-40°C
Topt=25°C
Topt=85°C
Topt=-40°C
Topt=25°C
Topt=85°C
0
50
100
[mA]
150
0
50
100
150
Output Current I
OUT
Output Current IOUT[mA]
R11x2N301B
R11x2N401B
0.600
0.600
0.500
0.400
0.300
0.200
0.100
0.000
0.500
0.400
0.300
0.200
0.100
0.000
Topt=-40°C
Topt=25°C
Topt=85°C
Topt=-40°C
Topt=25°C
Topt=85°C
0
50
100
150
0
50
100
150
Output Current IOUT[mA]
Output Current IOUT[mA]
R11x2N501B
0.600
0.500
0.400
0.300
0.200
0.100
0.000
Topt=-40°C
Topt=25°C
Topt=85°C
0
50
100
150
Output Current IOUT[mA]
Rev. 1.10
- 12 -
4) Output Voltage vs. Temperature
VIN=3.0V CIN=1mF
VIN=2.5V CIN=1mF
R11x2N151A/B
R11x2N201B
COUT=2.2mF IOUT=30mA
COUT=2.2mFIOUT=30mA
1.53
2.10
2.08
2.06
2.04
2.02
2.00
1.98
1.96
1.94
1.92
1.90
1.52
1.51
1.50
1.49
1.48
1.47
-50
-25
0
25
50
75
(°C)
100
-50
-25
0
25
50
75
(°C)
100
Temperature Topt
Temperature Topt
VIN=4.0V CIN=1mF
VIN=5.0V CIN=1mF
R11x2N301A/B
R11x2N401A/B
COUT=2.2mF IOUT=30mA
COUT=2.2mF IOUT=30mA
3.06
4.08
4.06
4.04
4.02
4.00
3.98
3.96
3.94
3.92
3.04
3.02
3.00
2.98
2.96
2.94
-50
-25
0
25
50
75
(°C)
100
-50
-25
0
25
50
75
(°C)
100
Temperature Topt
Temperature Topt
VIN=6.0V CIN=1mF
R11x2N501A/B
COUT=2.2mF IOUT=30mA
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
-50
-25
0
25
50
75
100
Temperature Topt(°C)
Rev. 1.10
- 13 -
5) Supply Current vs. Input Voltage
R11x2N151B
R11x2N201B
120
100
80
60
40
20
0
120
100
80
60
40
20
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
Input Voltage VIN[V]
Input Voltage VIN[V]
R11x2N301B
R11x2N401B
120
100
80
60
40
20
0
120
100
80
60
40
20
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
Input Voltage VIN[V]
Input Voltage VIN[V]
R11x2N501B
120
100
80
60
40
20
0
1
2
3
4
5
6
7
Input Voltage VIN[V]
Rev. 1.10
- 14 -
6) Supply Current vs. Temperature
VIN=2.5V CIN=1mF
COUT=2.2mF
VIN=3.0V CIN=1mF
COUT=2.2mF
R11x2N151A/B
R11x2N201A/B
200
200
150
100
50
150
100
50
0
0
-50
-25
0
25
50
75
(°C)
100
-50
-25
0
25
50
75
(°C)
100
Temperature Topt
Temperature Topt
VIN=4.0V CIN=1mF
COUT=2.2mF
VIN=5.0V CIN=1mF
COUT=2.2mF
R11x2N301A/B
R11x2N401A/B
200
150
100
50
200
150
100
50
0
0
-50
-25
0
25
50
75
(°C)
100
-50
-25
0
25
50
75
(°C)
100
Temperature Topt
Temperature Topt
VIN=6.0V CIN=1mF
COUT=2.2mF
R11x2N501A/B
200
150
100
50
0
-50
-25
0
25
50
75
100
Temperature Topt(°C)
Rev. 1.10
- 15 -
7) Ripple Rejection vs. Frequency
VIN=2.5V+0.5Vp-p
VIN=3.0V+0.5Vp-p
R11x2N201A/B
R11x2N151A/B
COUT=2.2mF IOUT=30mA
COUT=2.2mF IOUT=30mA
90.00
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
1
10
100
0.1
1
10
100
Frequency Freq [kHz]
Frequency Freq [kHz]
VIN=4.0V+0.5Vp-p
VIN=5.0V+0.5Vp-p
R11x2N401A/B
R11x2N301A/BCOUT=2.2mF IOUT=30mA
COUT=2.2mF IOUT=30mA
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
1
10
100
0.1
1
10
100
Frequency Freq [kHz]
Frequency Freq [kHz]
VIN=6.0V+0.5Vp-p
R11x2N501A/B
COUT=2.2mF IOUT=30mA
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
0.1
1
10
100
Frequency Freq [kHz]
Rev. 1.10
- 16 -
8) Ripple Rejection vs. Input Voltage (DC bias)
COUT =Ceramic 2.2mF
COUT =Ceramic 2.2mF
R11x2N301B
R11x2N301B
IOUT=1mA
IOUT=10mA
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
f=400Hz
f=1kHz
f=400Hz
f=1kHz
f=10kHz
f=10kHz
3.10
3.20
3.30
Input Voltage V [V]
3.40
3.50
3.10
3.20
3.30
3.40
3.50
IN
Input Voltage VIN[V]
COUT =Ceramic 2.2mF
R11x2N301B
IOUT=50mA
90.00
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
f=400Hz
f=1kHz
f=10kHz
3.10
3.20
3.30
3.40
3.50
Input Voltage VIN[V]
9) Input Transient Response
R11X2N151B
Topt=25°C
VIN
VIN=2.5V<-->3.5V
IOUT=30mA
CIN =none
VOUT
COUT=2.2mF
tr/tf=5ms
Rev. 1.10
- 17 -
R11X2N201B
Topt=25°C
VIN
VIN=3.0V<-->4.0V
IOUT=30mA
CIN =none
VOUT
COUT=2.2mF
tr/tf=5ms
R11X2N301B
Topt=25°C
VIN
VIN=4.0V<-->5.0V
IOUT=30mA
CIN =none
VOUT
COUT=2.2mF
tr/tf=5ms
R11X2N401B
Topt=25°C
VIN
VIN=5.0V<-->6.0V
IOUT=30mA
CIN =none
VOUT
COUT=2.2mF
tr/tf=5ms
Rev. 1.10
- 18 -
R11X2N501B
Topt=25°C
VIN
VIN=6.0V<-->7.0V
IOUT=30mA
CIN =none
COUT=2.2mF
tr/tf=5ms
VOUT
10)Load Transient Response
R11X2N151B
Topt=25°C
IOUT
IOUT=50mA<-->100mA
VIN=2.5V
VOUT
CIN=2.2mF
COUT=2.2mF
tr/tf=5ms
R11X2N201B
Topt=25°C
IOUT
IOUT=50mA<-->100mA
VIN=3.0V
VOUT
CIN=2.2mF
COUT=2.2mF
tr/tf=5ms
Rev. 1.10
- 19 -
R11X2N301B
Topt=25°C
IOUT
IOUT=50mA<-->100mA
VIN=4.0V
VOUT
CIN=2.2mF
COUT=2.2mF
tr/tf=5ms
R11X2N401B
Topt=25°C
IOUT
IOUT=50mA<-->100mA
VIN=5.0V
VOUT
CIN=2.2mF
COUT=2.2mF
tr/tf=5ms
R11X2N501B
Topt=25°C
IOUT
IOUT=50mA<-->100mA
VIN=6.0V
VOUT
CIN=2.2mF
COUT=2.2mF
tr/tf=5ms
Rev. 1.10
- 20 -
n TECHNICAL NOTES
When using these ICs, consider the following points:
In these ICs, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, be
sure to use a capacitor COUT with good frequency characteristics and ESR (Equivalent Series Resistance) of which is in the
range described as follows:
Spectrum
Analyzer
3
5
CE
VOUT
Ceramic
Cap.
R1112NXX1B
S.A.
ESR
1
VIN
GND
Ceramic
Cap.
2
VIN
IOUT
Measuring Circuit for white noise; R1112NXX1B
The relations between IOUT (Output Current) and ESR of Output Capacitor are shown below. The conditions when the white
noise level is under 40mV(Avg.) are marked as the hatched area in the graph.
(note: When the additional ceramic capacitors are connected to the Output Pin with Output capacitor for phase compensation,
the operation might be unstable. Because of this, test these ICs with as same external components as ones to be used on the
PCB.)
<measuring conditions>
(1) VIN=VOUT+1V
(2) Frequency band :10Hz to 1MHz
(3) Temperature : 25°C
R11X2N151B
R11X2N151B
OUT
IN
C
=2.2uF,C =2.2uF
COUT=4.7uF,CIN=2.2uF
100
10
100
10
1
1
0.1
0.01
0.1
0.01
0
30
60
90
120
150
0
30
60
90
120
150
IOUT[mA]
IOUT[mA]
Rev. 1.10
- 21 -
R11X2N301B
R11X2N301B
COUT=2.2uF,CIN=2.2uF
COUT=4.7uF,CIN=2.2uF
100
10
100
10
1
1
0.1
0.01
0.1
0.01
0
30
60
90
120
150
0
30
60
90
120
150
IOUT[mA]
IOUT[mA]
l
Make VDD and GND line sufficient. When the impedance of these is high, the noise might be picked up or not work
correctly.
l
l
Connect the capacitor with a capacitance of 2.2mF or more between VDD and GND as close as possible.
Set external components, especially Output Capacitor, as close as possible to the ICs and make wiring shortest.
Rev. 1.10
- 22 -
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