R1121N SERIES
LOW NOISE 150mA LDO REGULATOR
NO.EA-058-100202
OUTLINE
The R1121N Series are CMOS-based voltage regulator ICs with high output voltage accuracy, extremely low
supply current, low ON-resistance, and high Ripple Rejection. 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 R1121N 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 is SOT-23-5 (Mini-mold) package , high density mounting of the ICs on
boards is possible.
FEATURES
•
•
•
•
•
•
•
•
Supply Current ................................................................ Typ. 35μA
Standby Mode ................................................................. Typ. 0.1μA
Dropout Voltage .............................................................. Typ. 0.2V (I
OUT
=100mA)
Ripple Rejection.............................................................. Typ. 70dB(f=1kHz)
Temperature-Drift Coefficient of Output Voltage ............. Typ.
±100ppm/°C
Line Regulation ............................................................... Typ. 0.05%/V
Output Voltage Accuracy.................................................
±2.0%
Output Voltage Range..................................................... 1.5V to 5.0V (0.1V steps)
(
For other voltages, please refer to MARK INFORMATIONS.)
•
Package ........................................................................ SOT-23-5 (Mini-mold)
•
Built-in chip enable circuit ( 2 types; A: active “L”, B: active “H”)
•
Pin-out............................................................................. Similar to the TK112,TK111
APPLICATIONS
•
Power source for cellular phones such as GSM, CDMA and various kinds of PCSs.
•
Power source for domestic appliances such as cameras, VCRs and camcorders.
•
Power source for battery-powered equipment.
1
R1121N
BLOCK DIAGRAM
R1121Nxx1A
R1121Nxx1B
3
V
DD
1
V
OUT
3
V
DD
1
V
OUT
Vref
CE
4
Current Limit
GND
2
CE
4
Vref
Current Limit
GND
2
SELECTION GUIDE
The output voltage, the active type for the ICs can be selected at the user's request.
Product Name
R1121Nxx1∗-TR-FE
Package
SOT-23-5
Quantity per Reel
3,000 pcs
Pb Free
Yes
Halogen Free
Yes
xx : The output voltage can be designated in the range from 1.5V(15) to 5.0V(50) in 0.1V steps.
(For other voltages, please refer to MARK INFORMATIONS.)
∗
: Designation of Active Type.
(A) "L" active
(B) "H" active
2
R1121N
PIN CONFIGURATION
SOT-23-5
5
4
(mark side)
1
2
3
PIN DESCRIPTION
Pin No
1
2
3
4
5
Symbol
V
OUT
GND
V
DD
CE
or CE
Description
Output pin
Ground Pin
Input Pin
Chip Enable Pin
No Connection
NC
ABSOLUTE MAXIMUM RATINGS
Symbol
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 (SOT-23-5)
∗
Operating Temperature Range
Storage Temperature Range
Item
Rating
9.0
-0.3 ~ V
IN
+0.3
-0.3 ~ V
IN
+0.3
200
420
-40 ~ 85
-55 ~ 125
Unit
V
V
V
mA
mW
°C
°C
∗)
For Power Dissipation, please refer to PACKAGE INFORMATION.
ABSOLUTE MAXIMUM RATINGS
Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the
permanent damages and may degrade the life time and safety for both device and system using the device
in the field.
The functional operation at or over these absolute maximum ratings is not assured.
3
R1121N
ELECTRICAL CHARACTERISTICS
•
R1121Nxx1A
Symbol
V
OUT
I
OUT
ΔV
OUT
/ΔI
OUT
V
DIF
I
SS
Istandby
ΔV
OUT
/ΔV
IN
RR
V
IN
ΔV
OUT
/
ΔTopt
I
SC
R
PU
V
CEH
Topt=25°C
Item
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
Ripple Rejection
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE
Pull-up Resistance
Conditions
V
IN
=
Set V
OUT
+
1V
1mA
<
I
OUT
<
30mA
=
=
V
IN
=
Set V
OUT
+ 1V
1mA
<
I
OUT
<
80mA
=
=
Min.
V
OUT
×0.98
Typ.
Max.
V
OUT
×1.02
Unit
V
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
12
40
mV
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
V
IN
=
Set V
OUT
+
1V
V
IN
=
V
CE
=
Set V
OUT
+
1V
Set V
OUT
+0.5V
<
V
IN
<
8.0V
=
=
I
OUT
=
30mA
f = 1kHz, Ripple 0.5Vp-p
V
IN
= Set V
OUT
+ 1V
2.0
I
OUT
=
30mA
−40°C
<
Topt
<
85°C
=
=
V
OUT
=
0V
2.5
1.5
±100
50
5.0
10.0
V
IN
35
0.1
0.05
70
8.0
70
1.0
0.20
μA
μA
%/V
dB
V
ppm/°C
mA
MΩ
CE
Input Voltage “H”
CE
Input Voltage “L”
V
V
μ
Vrms
V
CEL
en
0.00
BW
=
10Hz to 100kHz
30
0.25
Output Noise
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
4
R1121N
•
R1121Nxx1B
Symbol
V
OUT
I
OUT
Δ
V
OUT
/
Δ
I
OUT
Topt=25°C
Item
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
Ripple Rejection
Input Voltage
Output Voltage
Temperature Coefficient
Short Current Limit
CE Pull-down Resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
Conditions
V
IN
=
Set V
OUT
+
1V
1mA
<
I
OUT
<
30mA
=
=
V
IN
=
Set V
OUT
+
1V
1mA
<
I
OUT
<
80mA
=
=
Min.
V
OUT
×
0.98
Typ.
Max.
V
OUT
×
1.02
Unit
V
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
12
40
mV
V
DIF
I
SS
Istandby
Δ
V
OUT
/
Δ
V
IN
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
V
IN
=
Set V
OUT
+
1V
V
IN
=
Set V
OUT
+
1V
V
CE
=GND
Set V
OUT
+
0.5V
<
V
IN
<
8.0V
=
=
I
OUT
=
30mA
f = 1kHz, Ripple 0.5Vp-p
V
IN
= Set V
OUT
+ 1V
2.0
I
OUT
=
30mA
−
40
°
C
<
Topt
<
85
°
C
=
=
V
OUT
=
0V
2.5
1.5
0.00
BW
=
10Hz to 100kHz
30
±
100
35
0.1
0.05
70
70
1.0
0.20
μ
A
μ
A
%/V
dB
RR
V
IN
Δ
V
OUT
/
Δ
Topt
8.0
V
ppm/
°
C
mA
I
SC
R
PD
V
CEH
V
CEL
en
50
5.0
10.0
V
IN
0.25
M
Ω
V
V
μ
Vrms
RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS)
All of electronic equipment should be designed that the mounted semiconductor devices operate within the
recommended operating conditions. The semiconductor devices cannot operate normally over the
recommended operating conditions, even if when they are used over such conditions by momentary
electronic noise or surge. And the semiconductor devices may receive serious damage when they continue
to operate over the recommended operating conditions.
5
