LOW DROPOUT AND LOW NOISE
VOLTAGE REGULATOR
1
OUTLINE
The Rx5RZ Series are CMOS-based voltage regulator ICs with high output voltage accuracy, low supply current,
low dropout voltage and high ripple rejection. Each of these voltage regulator ICs consists of a voltage reference
unit, an error amplifier, output voltage setting resistors, a current limit circuit and a chip enable circuit. (Provided
two types of chip enable circuit ; “H” active and “L” active, that can be selected when order.)for A/B version
The output voltage of these ICs is fixed with high accuracy.
In addition to low supply current from CMOS process, the Rx5RZ Series may lengthen battery life through low
dropout voltage and chip enable function thanks to the built-in low ON resistance transistor. Also when compared
with conventional regulators that employ CMOS process, these ICs have superior ripple rejection, input transient
response characteristic and load transient response characteristic thus making these product suitable for power sup-
ply for hand-held communication equipment.
Since the package for these ICs are the SOT-23-5 package and SOT89, high density mounting of the ICs on
boards is possible.
• Ultra-Low Supply Current...........................................Typ. 20µA
• Ultra-Low Supply Current (Standby).........................Typ. 0.1µA (for A/B version)
• High Accuracy Output Voltage ..................................±2.0%
• High Ripple Rejection .................................................Typ. 55dB (f=1kHz)
• Low Dropout Voltage ..................................................Typ. 0.2V (IOUT=60mA)
• Low Temperature-Drift Coefficient of Output Voltage........Typ. ±100ppm/˚C
• Excellent Line Regulation...........................................Typ. 0.05%/V
• Output Voltage .............................................................Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V
is possible (refer to Selection Guide).
• Built-in Short Current Limit Circuit...........................Typ. 50mA
• Small Package ..............................................................SOT-23-5 (Mini-mold), SOT89
FEATURES
APPLICATIONS
•Power source for battery-powered equipment.
•Power source for cellular phones, cameras, VCRs, camcorders, hand-held audio instruments and hand-held com-
munication equipment.
•Power source for domestic appliances.
Rx5RZ SERIES
NO. EA-039-0204
SELECTION GUIDE
2
Rx5RZ
BLOCK DIAGRAMS
2
51
VOUT
GND
VDD
CE
Vref
3
Current Limit
2
51
VOUT
GND
VDD
CE
+
–
Vref
3
Current Limit
+
–
RN5RZxxA RN5RZxxB
2
1
VOUT
GND
VDD
Vref
3
Current Limit
+
–
RH5RZxxC
Rx5RZ xxxx–xx ←Part Number
↑↑↑↑↑
abcde
}
The output voltage, the active type of the chip enable circuit, the packing type, and the taping type for the ICs
can be selected at the user's request.
These selections can be made by designating the part number as shown below:
Code Contents
Package type:
a
N : SOT23-5
H : SOT89
b
Setting Output Voltage (V
OUT
) :
Stepwise setting with a step of 0.1V in the range of 2.0V to 6.0V is possible.
Designation of Active Type of The Chip Enable Circuit :
c
A : “L” active type
B : “H” active type
C : no CE pin
Designation of Packing Type :
d
A : Taping
C : Antistatic bag (for Samples only)
e
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.)
}
For example, the product with Output Voltage of 5.0V, Specified Polarity of Chip Enable is “H” active and Taping
Type TR is designated by Part Number RN5RZ50BA-TR.
3
Rx5RZ
PIN CONFIGURATION
PIN DESCRIPTION
• SOT-23-5
123
54
(mark side)
Pin No. Symbol Description
1 GND Ground Pin
2VDD Input Pin
3VOUT Output Pin
4 NC No Connection
5 CE or CE Chip Enable Pin
ABSOLUTE MAXIMUM RATINGS
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum ratings are threshold limit values that must not be exceeded even for an instant under
any conditions. Moreover, such values for any two items must not be reached simultaneously. Operation
above these absolute maximum ratings may cause degradation or permanent damage to the device. These
are stress ratings only and do not necessarily imply functional operation below these limits.
Symbol Item Ratings Unit
VIN Input Voltage 9 V
VCE Input Voltage (CE or CE Pin) –0.3 to VIN +0.3 V
VOUT Output Voltage –0.3 to VIN +0.3 V
IOUT Output Current 200 mA
PDPower Dissipation 250 (SOT23-5) mW
500 (SOT89)
Topt Operating Temperature –40 to +85 ˚C
Tstg Storage Temperature –55 to +125 ˚C
• SOT89
123
(mark side)
4
Rx5RZ
ELECTRICAL CHARACTERISTICS
• RN5RZxxA Series
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN=VOUT+1V, IOUT=30mA ×0.98 ×1.02 V
IOUT Output Current VIN=VOUT+1V 100 mA
When VOUT=VOUT–0.1V
∆VOUT Load Regulation VIN=VOUT+1V 20 40 mV
∆IOUT 1mA≤IOUT≤80mA
VDIF Dropout Voltage IOUT=60mA 0.2 0.3 V
ISS Supply Current VIN=VOUT+1V 20 40 µA
Istandby Supply Current (Standby) VIN=VCE=VOUT+1V 0.1 1.0 µA
∆VOUT Line Regulation IOUT=30mA 0.05 0.20 %/V
∆VIN VOUT+0.5V≤VIN≤8.0V
RR Ripple Rejection f=1kHz, Ripple 0.5Vrms 55 dB
VIN=VOUT+1V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=30mA ±100
ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 50 mA
RPU CE Pull-up Resistance 2.5 5.0 10.0 MΩ
VCEH CE Input Voltage “H”1.5 V
VCEL CE Input Voltage “L”0.00 0.25 V
Topt=25˚C
5
Rx5RZ
• RN5RZxxB Series
Symbol Item Conditions Min. Typ. Max. Unit
V
OUT
Output Voltage V
IN
=V
OUT
+1V, I
OUT
=30mA ×0.98 ×1.02 V
IOUT Output Current VIN=VOUT+1V 100 mA
When VOUT=VOUT–0.1V
∆VOUT Load Regulation VIN=VOUT+1V 20 40 mV
∆IOUT 1mA≤IOUT≤80mA
VDIF Dropout Voltage IOUT=60mA 0.2 0.3 V
ISS Supply Current VIN=VOUT+1V 20 40 µA
Istandby Supply Current (Standby) VIN=VOUT+1V, VCE=GND 0.1 1.0 µA
∆VOUT Line Regulation IOUT=30mA 0.05 0.20 %/V
∆VIN VOUT+0.5V≤VIN≤8.0V
RR Ripple Rejection f=1kHz, Ripple 0.5Vrms 55 dB
VIN=VOUT+1V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=30mA ±100
ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 50 mA
RPU CE Pull-down Resistance 2.5 5.0 10.0 MΩ
VCEH CE Input Voltage “H”1.5 V
VCEL CE Input Voltage “L”0.00 0.25 V
Topt=25˚C
• RH5RZxxC Series
Symbol Item Conditions Min. Typ. Max. Unit
VOUT Output Voltage VIN=VOUT+1V, IOUT=30mA ×0.98 ×1.02 V
IOUT Output Current VIN=VOUT+1V 100 mA
∆VOUT Load Regulation VIN=VOUT+1V 20 40 mV
∆IOUT 1mA≤IOUT≤80mA
VDIF Dropout Voltage IOUT=60mA 0.2 0.3 V
ISS Supply Current VIN=VOUT+1V 20 40 µA
∆VOUT Line Regulation IOUT=30mA 0.05 0.20 %/V
∆VIN VOUT+0.5V≤VIN≤8.0V
RR Ripple Rejection f=1kHz, Ripple 0.5Vrms 55 dB
VIN=VOUT+1V
VIN Input Voltage 8V
∆VOUT Output Voltage IOUT=30mA ±100
ppm/˚C
∆Topt Temperature Coefficient –40˚C≤Topt≤85˚C
Ilim Short Current Limit VOUT=0V 50 mA
Topt=25˚C
6
Rx5RZ
OPERATION
TEST CIRCUITS
2
51
VOUT
GND
VDD
CE
Vref
3
Current Limit
R1
R2
2
51
VOUT
GND
VDD
CE
+
–
Vref
3
Current Limit
R1
R2
Error Amp. Error Amp.
+
–
RN5RZxxA RN5RZxxB
2
1
VOUT
GND
VDD
Vref
3
Current Limit
R1
R2
+
–
RH5RZxxC
In these ICs, the output voltage VOUT is detected by feed-back registers R1, R2, and the detected output voltage
is compared with a reference voltage by an error amplifier, so that a constant voltage is output.
A current limit circuit working for short protection and a chip enable circuit for standby function are included.
23
1
5
VDD VOUT
GND
RN5RZxxB
SERIES
C1 : 1µF
C2 : 10µF
C1VIN C2
IOUT
CE
23
1
5
VDD VOUT
RN5RZxxB
SERIES
C1 : 1µF
C2 : 10µF
C1
VIN C2
A
GND
CE
Fig.1 Standard Test Circuit Fig.2 Supply Current Test Circuit
7
Rx5RZ
23
1
5
VDD VOUT
RN5RZxxB
SERIES
C1 : 10µF
VIN
C1
IOUT
P.G.
GND
CE
Fig.3 Line Transient Response Test Circuit
23
1
5
VDD VOUT
RN5RZxxB
SERIES
C1 : 1µF
C2 : 10µF
C1VIN C2
l1 l2
GND
CE
Fig.4 Load Transient Response Test Circuit
23
1
5
VDD VOUT
RN5RZxxB
SERIES
C1 : 1µF
C2 : 10µF
C1
VIN C2
IOUT
GND
CE
Fig.5 Ripple Rejection Test Circuit
8
Rx5RZ
TYPICAL CHARACTERISTICS
1) Output Voltage vs. Output Current
Rx5RZ30x
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
Output Current IOUT(mA)
Output Voltage VOUT(V)
0 100 200 300 400 500
3.5V 4.0V
5.0V
VIN=3.3V
Rx5RZ40x
5.0
4.5
4.0
3.5
3.0
2.5
1.5
1.0
2.0
0.5
0.0
Output Current IOUT(mA)
Output Voltage VOUT(V)
0 100 200 300 400 500
4.5V 5.0V 6.0V
VIN=4.3V
Rx5RZ50x
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Output Current IOUT(mA)
Output Voltage VOUT(V)
0 100 200 300 400 500
6.0V
5.5V
7.0V
VIN=5.3V
Rx5RZ30x
Input Voltage VIN(V)
Output Voltage VOUT(V)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.0 2.0 4.0 8.06.0
IOUT=0mA
IOUT=30mA
IOUT=50mA
Rx5RZ40x
Input Voltage VIN(V)
Output Voltage VOUT(V)
5.0
4.0
3.0
2.0
1.0
0.0
0.0 2.0 4.0 8.06.0
IOUT=0mA
IOUT=30mA
IOUT=50mA
2) Output Voltage vs. Input Voltage
9
Rx5RZ
3) Dropout Voltage vs. Output Current
Rx5RZ50x
Input Voltage VIN(V)
Output Voltage VOUT(V)
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0.0 2.0 4.0 6.0 8.0
IOUT=0mA
IOUT=30mA
IOUT=50mA
Rx5RZ30x
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
0 20406080100
Topt=–40˚C
Topt=25˚C
Topt=85˚C
Rx5RZ40x
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
0 20406080100
Topt=–40˚C
Topt=25˚C
Topt=85˚C
Rx5RZ50x
0.30
0.25
0.20
0.15
0.10
0.05
0.00
Output Current IOUT(mA)
Dropout Voltage VDIF(V)
0 20406080100
Topt=–40˚C
Topt=25˚C
Topt=85˚C
0.35
10
Rx5RZ
4) Output Voltage vs. Temperature
5) Supply Current vs. Input Voltage
Rx5RZ30x
3.10
3.05
3.00
2.95
2.90
Temperature Topt(˚C)
Output Voltage VOUT(V)
–50 0 50 100
Rx5RZ40x
4.10
4.05
4.00
3.95
3.90
Temperature Topt(˚C)
Output Voltage VOUT(V)
–50 0 50 100
Rx5RZ50x
5.10
5.05
5.00
4.95
4.90
Temperature Topt(˚C)
Output Voltage VOUT(V)
–50 0 50 100
Rx5RZ30x
30
25
20
15
10
5
0
Input Voltage VIN(V)
Supply Current ISS(µA)
0.0 2.0 4.0 8.06.0
Rx5RZ40x
30
25
20
15
10
5
0
Input Voltage VIN(V)
Supply Current ISS(µA)
0.0 2.0 4.0 8.06.0
11
Rx5RZ
6) Supply Current vs. Temperature
Rx5RZ50x
30
25
20
15
10
5
0
Input Voltage VIN(V)
Supply Current ISS(µA)
0.0 2.0 4.0 8.06.0
Rx5RZ30x
30
25
20
15
10
5
0
Temperature Topt(˚C)
Supply Current ISS(µA)
–50 0 50 100
Rx5RZ40x
30
25
20
15
10
5
0
Temperature Topt(˚C)
Supply Current ISS(µA)
–50 0 50 100
Rx5RZ50x
30
25
20
15
10
5
0
Temperature Topt(˚C)
Supply Current ISS(µA)
–50 0 50 100
12
Rx5RZ
8) Ripple Rejection vs. Frequency
Rx5RZ30x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 2.2µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
7) Dropout Voltage vs. Set Output Voltage
Rx5RZxxx
0.35
0.30
0.25
0.20
0.15
0.10
0.00
0.05
Set Output Voltage Vreg(V)
Dropout Voltage VDIF(V)
234 65
Topt=25˚C
IOUT=10mA
IOUT=30mA
IOUT=50mA
IOUT=100mA
Rx5RZ30x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 4.7µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ30x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 10µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ40x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 2.2µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
13
Rx5RZ
Rx5RZ40x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 4.7µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ40x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 10µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ50x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 2.2µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ50x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 4.7µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
Rx5RZ50x
80
70
60
50
40
30
20
0
10
Frequency f(kHZ)
Ripple Rejection RR(dB)
0.1 1 10 100
COUT=tantal 10µF
IOUT=1mA
IOUT=30mA
IOUT=50mA
14
Rx5RZ
10) Line Transient Response
3.4
3.3
3.2
3.1
3.0
2.9
2.8
6
5
4
3
2
1
0
Time t(µS)
Output Voltage VOUT(V)
Input Voltage VIN(V)
100 20 40506070809010030
tr=tf=5µS
COUT=Ceramic 2.2µF+ESR 1Ω
Input Voltage
Output Voltage
9) Ripple Rejection vs. Input Voltage (DC bias)
Rx5RZ30x
70
60
50
40
30
20
0
10
Input Voltage VIN(V)
Ripple Rejection RR(dB)
3.1 3.2 3.3 3.53.4
IOUT =1mA
COUT=tantal 10µF
f=400Hz
f=1kHz
f=10kHz
Rx5RZ30x
70
60
50
40
30
20
0
10
Input Voltage VIN(V)
Ripple Rejection RR(dB)
3.1 3.2 3.3 3.53.4
f=400Hz
f=1kHz
f=10kHz
IOUT =10mA
COUT=tantal 10µF
Rx5RZ30x
70
60
50
40
30
20
0
10
Input Voltage VIN(V)
Ripple Rejection RR(dB)
3.1 3.2 3.3 3.53.4
IOUT =50mA
COUT=tantal 10µF
f=400Hz
f=1kHz
f=10kHz
15
Rx5RZ
11) Load Transient Response
3.4
3.3
3.2
3.1
3.0
2.9
2.8
6
5
4
3
2
1
0
Time t(µS)
Output Voltage VOUT(V)
Input Voltage VIN(V)
100 20 40506070809010030
tr=tf=5µS
COUT=Tantal 3.3µF
Input Voltage
Output Voltage
3.4
3.3
3.2
3.1
3.0
2.9
2.8
6
5
4
3
2
1
0
Time t(µS)
Output Voltage VOUT(V)
Input Voltage VIN(V)
100 20 40506070809010030
tr=tf=5µS
COUT=Tantal 10µF
Input Voltage
Output Voltage
3.4
3.3
3.2
3.1
3.0
2.9
2.8
150
100
50
0
–50
–100
–150
Time t(µS)
Output Voltage VOUT(V)
Output Current IOUT(mA)
100 20 40506070809010030
COUT=Ceramic 2.2µF+1Ω
Output Current
Output Voltage
16
Rx5RZ
3.4
3.3
3.2
3.1
3.0
2.9
2.8
150
100
50
0
–50
–100
–150
Time t(µS)
Output Voltage VOUT(V)
Output Current IOUT(mA)
100 20 40506070809010030
COUT=Tantal 2.2µF
Output Current
Output Voltage
3.4
3.3
3.2
3.1
3.0
2.9
2.8
150
100
50
0
–50
–100
–150
Time t(µS)
Output Voltage VOUT(V)
Output Current IOUT(mA)
100 20 40506070809010030
COUT=Tantal 3.3µF
Output Current
Output Voltage
3.4
3.3
3.2
3.1
3.0
2.9
2.8
150
100
50
0
–50
–100
–150
Time t(µS)
Output Voltage VOUT(V)
Output Current IOUT(mA)
100 20 40506070809010030
COUT=Tantal 10µF
Output Current
Output Voltage
17
Rx5RZ
• Countermeasure for Noise
FOR STABLE OPERATION
23
1
5
VIN
Ceramic
Capacitor
Spectrum
Analyzer
VOUT
IOUT
RN5RZxxB
SERIES
ESR
VIN S.A.
Ceramic capacitor
0.01µF
GND
CE
The relationship between output current (IOUT) and Equivalent Series Resistance (ESR) in the output capacitor is
described in the graphs below. The conditions when the noise level is under 40µV (Avg.) are indicated by the
hatched area in the graph.
[Measuring conditions]
Frequency band : 0Hz to 1MHz
Temperature : 25˚C
Measuring circuit for white noise ; RN5RZ30B
Ceramic Capacitor 1µF
100.0
10.0
1.0
0.1
0.0
Output Current IOUT(mA)
ESR(W)
0.0 20.0 40.0 60.0 80.0 100.0
: Noise level is under 40µV
Ceramic Capacitor 2.2µF
100.0
10.0
1.0
0.1
0.0
Output Current IOUT(mA)
ESR(W)
0.0 20.0 40.0 60.0 80.0 100.0
: Noise level is under 40µV
18
Rx5RZ
Ceramic Capacitor 4.7µF
100.0
10.0
1.0
0.1
0.0
Output Current IOUT(mA)
ESR(W)
0.0 20.0 40.0 60.0 80.0 100.0
: Noise level is under 40µV
Ceramic Capacitor 10µF
100.0
10.0
1.0
0.1
0.0
Output Current IOUT(mA)
ESR(W)
0.0 20.0 40.0 60.0 80.0 100.0
: Noise level is under 40µV
APPLICATION HINTS
When using these ICs, be sure to take care regarding the following points :
• In these ICs, phase compensation is made for securing stable operation even when the load current is var-
ied. For this purpose, be sure to use a capacitor COUT with good frequency characteristics and ESR in the
range described above.
• Make VDD and GND lines sufficient. If their impedance is high, the noise picked up or unstable operation
may result.
• Connect the capacitor with a capacitance of about 1µF between VDD and GND with wiring as short as possi-
ble.
• Set external components as close as possible to the ICs and make wiring as short as possible.
PACKAGE INFORMATION PE-SOT-89-071210
• SOT-89 (SC-62) Unit: mm
PACKAGE DIMENSIONS
4.5±0.1
0.4±0.1
0.4±0.1
1.5±0.1
1.6±0.2
1.5±0.1
±0.1
1.5±0.1
2.5±0.11.0±0.2
0.3±0.2
∅1.0
12
3321
0.42±0.1 0.47 0.42±0.1
4.0 +0.25
−0.35
0.1 S
S
Bottom View
TAPING SPECIFICATION (T1: Standard Type)
T1
12±0.3
2.5Max.
0.3±0.1
∅
8.0±0.1
5.0
1.5 4.0±0.1 2.0±0.05
1.5±0.1
5.65±0.05
+0.1
0
4.7
∅1.6±0.1
User Direction of Feed
TAPING REEL DIMENSIONS
(1reel=1000pcs)
15.4±1.0
13±0.3
21±0.8
2±0.5
∅ 60 0
∅ 180−1.5
+1
0
13±0.2∅
PACKAGE INFORMATION PE-SOT-89-071210
POWER DISSIPATION (SOT-89)
This specification is at mounted on board. Power Dissipation (PD) depends on conditions of mounting on board.
This specification is based on the measurement at the condition below:
Measurement Conditions
Standard Land Pattern
Environment Mounting on Board (Wind velocity=0m/s)
Board Material Glass cloth epoxy plastic (Double si ded)
Board Dimensions 50mm × 50mm × 1.6mm
Copper Ratio Top side : Approx. 10% , Back side : Approx. 100%
Through-hole -
Measurement Result (Topt=25°C,Tjmax=125°C)
Standard Land Pattern Free Air
Power Dissipation 900mW 500mW
Thermal Resistance θja=(125−25°C)/0.9W=111°C/W 200°C/W
0 50 10025 75 125 150
Ambient Temperature (°C)
0
250
500
900
750
1000
Power Dissipation P
D
(mW)
On Board
Free Air
50
50
Power Dissipation Measurement Board Pattern
IC Mount Area (Unit : mm)
RECOMMENDED LAND PATTERN (SOT-89)
3.0
45°
0.71.5
1.5
1.5
1.0
1.0
1.0
2.0
(Unit : mm)