LOW DROPOUT AND LOW NOISE
VOLTAGE REGULATOR
Rx5RZ SERIES
NO. EA-039-0204
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.
FEATURES
• 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 (I
OUT
=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
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.
1
Rx5RZ
BLOCK DIAGRAMS
RN5RZxxA
RN5RZxxB
V
DD
2
–
+
Vref
Current Limit
CE 5
3 V
OUT
V
DD
2
–
+
Vref
Current Limit
3 V
OUT
1 GND
CE 5
1 GND
RH5RZxxC
V
DD
2
–
+
Vref
Current Limit
3 V
OUT
1 GND
SELECTION GUIDE
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:
Rx5RZ xxxx
–
xx
←
Part Number
}
}
↑
a
Code
a
b
↑ ↑↑ ↑
b cd e
Contents
Package type:
N : SOT23-5
H : SOT89
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 :
A : “L” active type
B : “H” active type
C : no CE pin
Designation of Packing Type :
A : Taping
C : Antistatic bag (for Samples only)
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications ; TR type is the standard direction.)
c
d
e
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.
2
Rx5RZ
PIN CONFIGURATION
• SOT-23-5
5
4
• SOT89
(mark side)
(mark side)
1
2
3
1
2
3
PIN DESCRIPTION
Pin No.
Symbol
Description
1
2
3
4
5
GND
V
DD
V
OUT
NC
CE or CE
Ground Pin
Input Pin
Output Pin
No Connection
Chip Enable Pin
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Ratings
Unit
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
Input Voltage
Input Voltage (CE or CE Pin)
Output Voltage
Output Current
Power Dissipation
Operating Temperature
Storage Temperature
9
–0.3 to V
IN
+0.3
–0.3 to V
IN
+0.3
200
250 (SOT23-5)
500 (SOT89)
–40 to +85
–55 to +125
V
V
V
mA
mW
˚C
˚C
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.
3
PCB Design
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