R1140Q SERIES
Discontinued
120mA LDO REGULATOR
NO.EA-074-110412
OUTLINE
The R1140Q Series are CMOS-based voltage regulator ICs with high output voltage accuracy, 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 for setting Output Voltage, 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 R1140Q 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 internally fixed with high accuracy. Since the package for these ICs is
SC-82AB (Super Mini-mold) package, high density mounting of the ICs on boards is possible.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
Power source for cellular phones such as GSM, CDMA and various kinds of PCS.
•
Power source for electrical appliances such as cameras, VCRs and camcorders.
•
Power source for battery-powered equipment.
Di
APPLICATION
sc
o
Ultra-Low Supply Current............................................. Typ. 75μA
Standby Mode .............................................................. Typ. 0.1μA
Low Dropout Voltage.................................................... Typ. 0.15V (I
OUT
=100mA,
Output Voltage=3.0V Type)
High Ripple Rejection .................................................. Typ. 75dB (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%
Output Voltage Range.................................................. 1.5V to 4.0V
Excellent Dynamic Response
Small Package ............................................................. SC-82AB (Super Mini-mold)
Built-in Chip Enable Circuit (B/D : active high)
Built-in Fold-back Protection Circuit............................ Typ. 40mA (Current at short mode)
nt
inu
ed
1
R1140Q
Discontinued
BLOCK DIAGRAMS
R1140Qxx1B
R1140Qxx1D
1
V
DD
4
V
OUT
V
DD
4
1
V
OUT
Vref
Current Limit
Vref
Current Limit
2
CE
3
SELECTION GUIDE
R1140Qxx1x-xx-x
←
Part Number
↑ ↑
a b
Code
↑ ↑ ↑
c d e
a
b
c
d
e
2
Di
Designation of Package Type
Q: SC-82AB (Super Mini-mold)
Setting Output Voltage (V
OUT
):
Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible.
Designation of Mask Option :
B: Without auto discharge function at OFF state.
D: With auto discharge function at OFF state.
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.)
Desiguation of composition of pin plating
-F : Leed free plating
sc
o
nt
inu
Contents
The output voltage, mask option, 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;:
ed
GND
CE
3
2
GND
R1140Q
Discontinued
PIN CONFIGURATION
SC-82AB
4
3
(mark side)
1
Pin No
Symbol
1
2
3
4
V
OUT
GND
CE
V
DD
Symbol
sc
o
Item
ABSOLUTE MAXIMUM RATINGS
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
∗
nt
inu
Output Pin
Ground Pin
Chip Enable Pin
Input Pin
PIN DESCRIPTION
ed
2
Pin Description
Rating
Unit
Input Voltage
6.5
−
0.3 to V
IN
+
0.3
−
0.3 to V
IN
+
0.3
V
V
V
mA
mW
°
C
°
C
Input Voltage (CE Pin)
Output Voltage
Output Current
Di
140
380
−
40 to 85
−
55 to 125
Power Dissipation (SC-82AB)
∗
Operating Temperature Range
Storage Temperature Range
)
For Power Dissipation, please refer to PACKAGE INFORMATION to be described.
3
R1140Q
Discontinued
ELECTRICAL CHARACTERISTICS
•
R1140Qxx1B/D
Topt=25°C
Symbol
Item
Conditions
Min.
Typ.
Max.
Unit
V
OUT
I
OUT
Δ
V
OUT
/
Δ
I
OUT
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
V
IN
=
Set V
OUT
+1.0V
1mA
<
I
OUT
<
30mA
=
=
V
IN
−
V
OUT
=
1.0V
V
OUT
×
0.98
120
V
OUT
×
1.02
V
mA
mV
V
DIF
I
SS
Istandby
Δ
V
OUT
/
Δ
V
IN
V
IN
=
Set V
OUT
+
1.0V
ed
2.2
85
°
C
1.5
1.5
0.0
Typ.
V
IN
=
Set V
OUT
+
1.0V
12
40
1mA
<
I
OUT
<
120mA
=
=
Refer to the ELECTRICAL CHARACTERISTICS
by OUTPUT VOLTAGE
75
150
1.0
0.20
V
IN
=
V
CE
=
Set V
OUT
+
1.0V
0.1
μ
A
μ
A
nt
inu
f
=
1kHz, Ripple 0.5Vp-p
V
IN
=
Set V
OUT
+1V,
I
OUT
=
30mA
(In case that V
OUT
<
1.7V,
=
V
IN
−
V
OUT
=
1.2V)
I
OUT
=
30mA
−
40
°
C
<
Topt
=
<
=
Set V
OUT
+
0.5V
<
V
IN
<
6.0V
=
=
I
OUT
=
30mA
(In case that V
OUT
<
1.6V,
=
<
V
IN
<
6.0V)
2.2V
=
=
0.05
%/V
RR
Ripple Rejection
75
dB
V
IN
Δ
V
OUT
/
Δ
Topt
Input Voltage
6.0
±
100
V
ppm/
°
C
mA
sc
o
V
OUT
=
0V
Output Voltage Temperature
Coefficient
Short Current Limit
I
LIM
R
PU
V
CEH
V
CEL
en
R
LOW
40
4.0
16.0
V
IN
0.3
30
70
CE
Pull up resistance
CE
Input Voltage “H”
M
Ω
V
V
µVrms
Ω
CE
Input Voltage “L”
Low Output Nch Tr. ON
Resistance (of D version)
Di
Output Noise
BW
=
10Hz to 100kHz
V
CE
=
0V
•
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt
=
25°C
Output Voltage
V
OUT
(V)
Dropout Voltage V
DIF
(V)
Condition
Max.
1.5V
1.7V
1.9V
2.1V
2.8V
<
=
<
=
<
=
<
=
<
=
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
<
=
<
=
<
=
<
=
<
=
1.6V
1.8V
2.0V
2.7V
4.0V
I
OUT
=
120mA
0.36
0.30
0.28
0.24
0.18
0.70
0.50
0.45
0.40
0.30
4
R1140Q
Discontinued
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 2.2µF or more capacitor C
OUT
with good frequency characteristics and ESR
(Equivalent Series Resistance).
(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 V
DD
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 as much as 1.0µF capacitor between V
DD
and GND pin as
close as possible.
Set external components, especially output capacitor as close as possible to the ICs and make wiring
shortest.
TYPICAL APPLICATION
OUT
nt
inu
1 V
OUT
V
DD
4
R1140Q
SERIES
2 GND
CE 3
sc
o
C2
Di
(External Components)
Output Capacitor; Tantalum Type
ed
IN
C1
5
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