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Datasheet: R1122N201A (RICOH electronics devices division)

LOW NOISE 150mA LDO REGULATOR

 

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RICOH electronics devices division
2000. 3.13
LOW NOISE 150mA LDO REGULATOR
R1122N SERIES
Rev. 1.10
- 1 -
n
OUTLINE
The R1122N 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 R1122N 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
l
Ultra-Low Supply Current.................................................TYP. 100
mA
l
Standby Mode ...................................................................TYP. 0.1
mA
l
Low Dropout Voltage ........................................................TYP. 0.19V (I
OUT
= 100mA, 3V Output type)
l
High Ripple Rejection .......................................................TYP. 80dB (f = 1kHz)
l
Low Temperature-Drift Coefficient of Output Voltage .....TYP.
100ppm/C
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Excellent Line Regulation .................................................TYP. 0.05%/V
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High Accuracy Output Voltage..........................................
2.0%
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Small Package ..................................................................SOT-23-5 (Mini-mold)
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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 "L", B: active "H")
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Built-in Fold-back protection circuit .................................Short Current Typ. 30mA
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Pinout ................................................................................Similar to the TK112, TK111
l
Ceramic Capacitors are Recommendable to be used with this IC.
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APPLICATIONS
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Power source for cellular phones such as GSM, CDMA, PCS and so forth.
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Power source for domestic appliances such as cameras, VCRs and camcorders.
l
Power source for battery-powered equipment.
Rev. 1.10
- 2 -
n
BLOCK DIAGRAM
R1122NXX1A
R1122NXX1B
Vref
Current Limit
V
DD
3
1
2
4
V
OUT
GND
CE
Vref
Current Limit
V
DD
3
1
2
4
V
OUT
GND
CE
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 :
R1122NXX1X-XX
Part Number
- - -
a b
c
Code
Contents
a
Setting Output Voltage (V
OUT
) :
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
b
Designation of Active Type :
A : active "L" type
B : active "H" type
c
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.)
Rev. 1.10
- 3 -
n
PIN CONFIGURATION
SOT-23-5
5
4
NC
CE
(mark side)
1
2
3
V
OUT
GND
V
DD
n
PIN DESCRIPTION
Pin No.
Symbol
Description
1
V
OUT
Output pin
2
GND
Ground Pin
3
V
DD
Input Pin
4
CE or CE
Chip Enable Pin
5
NC
No Connection
Rev. 1.10
- 4 -
n
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
V
IN
Input Voltage
7.0
V
V
CE
Input Voltage (CE or CE Pin)
-0.3 ~ V
IN
+0.3
V
V
OUT
Output Voltage
-0.3~ V
IN
+0.3
V
I
OUT
Output Current
200
mA
P
D
Power Dissipation
250
mW
Topt
Operating Temperature
Range
-40 ~ 85
C
Tstg
Storage Temperature Range
-55 ~ 125
C
n
ELECTRICAL CHARACTERISTICS
l
R1122NXX1A
Topt = 25
C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
V
OUT
Output Voltage
V
IN
= Set V
OUT
+1V
1mA
I
OUT
30mA
V
OUT
0.98
V
OUT
1.02
V
I
OUT
Output Current
V
IN
= Set V
OUT
+1V
When V
OUT
= Set V
OUT
-0.1V
150
mA
DV
OUT
/
DI
OUT
Load Regulation
V
IN
= Set V
OUT
+1V
1mA
I
OUT
80mA
12
40
mV
V
DIF
Dropout Voltage
refer to the ELECTICAL CHARACTERISTICS by OUTPUT
VOLTAGE
I
SS
Supply Current
V
IN
= Set V
OUT
+1V
100
170
mA
Istandby
Supply Current (Standby)
V
IN
= V
CE
= Set V
OUT
+1V
0.1
1.0
mA
DV
OUT
/
DV
IN
Line Regulation
Set V
OUT
+0.5V
V
IN
8V
I
OUT
= 30mA
0.05
0.20
%/V
RR
Ripple Rejection
f = 1KHz, Ripple 0.5Vp-p
V
IN
= Set V
OUT
+1V
80
dB
V
IN
Input Voltage
2.0
6.0
V
DV
OUT
/
DT
Output Voltage
Temperature Coefficient
I
OUT
= 30mA
-40
C Topt 85C
100
ppm
/
C
Ilim
Short Current Limit
V
OUT
= 0V
30
mA
R
PU
CE Pull-up Resistance
2.5
5
10
M
W
V
CEH
CE Input Voltage "H"
1.5
V
IN
V
V
CEL
CE Input Voltage "L"
0
0.25
V
en
Output Noise
BW = 10Hz ~ 100kHz
30
mVrms
Rev. 1.10
- 5 -
l
R1122NXX1B
Topt=25
C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
V
OUT
Output Voltage
V
IN
= Set V
OUT
+1V
1mA
I
OUT
30mA
V
OUT
0.98
V
OUT
1.02
V
I
OUT
Output Current
V
IN
= Set V
OUT
+1V
When V
OUT
= Set V
OUT
-0.1V
150
mA
DV
OUT
/
DI
OUT
Load Regulation
V
IN
= Set V
OUT
+1V
1mA
I
OUT
80mA
12
40
mV
V
DIF
Dropout Voltage
refer to the ELECTICAL CHARACTERISTICS by OUTPUT
VOLTAGE
I
SS
Supply Current
V
IN
= Set V
OUT
+1V
100
170
mA
Istandby
Supply Current (Standby)
V
IN
= Set V
OUT
+1V
V
CE
= GND
0.1
1.0
mA
DV
OUT
/
DV
IN
Line Regulation
Set V
OUT
+0.5V
V
IN
8V
I
OUT
= 30mA
0.05
0.20
%/V
RR
Ripple Rejection
f = 1KHz, Ripple 0.5Vp-p
V
IN
= Set V
OUT
+1V
80
dB
V
IN
Input Voltage
2.0
6.0
V
DV
OUT
/
DT
Output Voltage
Temperature Coefficient
I
OUT
= 30mA
-40
C Topt 85C
100
ppm
/
C
Ilim
Short Current Limit
V
OUT
= 0V
30
mA
R
PD
CE Pull-down Resistance
2.5
5
10
M
W
V
CEH
CE Input Voltage "H"
1.5
V
IN
V
V
CEL
CE Input Voltage "L"
0
0.25
V
en
Output Noise
BW = 10Hz ~ 100kHz
30
mVrms
l
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25
C
Dropout Voltage
V
DIF
(V)
Output Voltage
V
OUT
(V)
Conditions
TYP.
MAX.
1.5
V
OUT
1.6
0.32
0.55
1.7
V
OUT
1.8
0.28
0.47
1.9
V
OUT
2.3
0.25
0.35
2.4
V
OUT
2.7
0.20
0.29
2.8
V
OUT
5.0
I
OUT
= 100mA
0.19
0.26
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