SC-82 120mA LDO REGULATOR
R1141Q SERIES
OUTLINE
NO. EA-082-0411
The R1141Q Series consist of 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.
Output Current Limit circuit is embedded in the R1141Q Series to prevent the break down of the IC caused by
excess current.
Chip enable circuit realizes standby mode and makes consumption current extremely small.
These ICs perform with low dropout voltage and a chip enable function. The line transient response and load
transient response of the R1141Q Series are excellent, making these ICs very suitable for the power supply for
hand-held communication equipment.
Their output voltage 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
•
•
•
•
•
•
•
•
•
•
•
•
•
Ultra-Low Supply Current............................................. Typ. 90µA
Standby Mode .............................................................. Typ. 0.1µA
Low Dropout Voltage.................................................... Typ. 0.15V (I
OUT
=100mA,
Output Voltage=3.0V Type)
High Ripple Rejection .................................................. Typ. 75dB (V
OUT
<
2.4V)
=
..................................................................................... Typ. 70dB (V
OUT
>
2.5V) (f=1kHz)
=
Low Temperature-Drift Coefficient of Output Voltage... Typ.
±100ppm/°C
Excellent Line Regulation ............................................ Typ. 0.02%/V
High Output Voltage Accuracy .....................................±1.5% or
±30mV
(V
OUT
<
2.0V)
=
Excellent Dynamic Response
Small Package ............................................................. SC-82AB (Super Mini-mold)
Output Voltage .............................................................Stepwise setting with a step of 0.1V in the range of
1.5V to 4.0V is possible
Built-in Chip Enable Circuit (B/D : active high)
Built-in Fold-back Protection Circuit............................ Typ. 40mA (Short Current)
Ceramic capacitor can be used for Output pin ........... Recommended value is 2.2µF or more.
APPLICATIONS
•
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,
and hand-held communication equipment.
•
Power source for battery-powered equipment.
•
Very stable Voltage Reference
1
R1141Q
BLOCK DIAGRAMS
R1141Qxx1B
V
DD
4
-
+
Vref
Current Limit
CE 3
2 GND
CE 3
Vref
Current Limit
2 GND
1 V
OUT
V
DD
4
-
+
R1141Qxx1D
1 V
OUT
SELECTION GUIDE
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 with designating the part number as shown below;
R1141Qxx1x-xx
↑↑
ab
Code
a
b
c
d
↑ ↑
c d
←Part
Number
Contents
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 (refer to Taping Specifications.)
2
R1141Q
PIN CONFIGURATION
SC-82AB
4
3
(mark side)
1
2
PIN DESCRIPTION
Pin No
1
2
3
4
Symbol
V
OUT
GND
CE
V
DD
Output Pin
Ground Pin
Chip Enable Pin
Input Pin
Pin Description
ABSOLUTE MAXIMUM RATINGS
Symbol
V
IN
V
CE
V
OUT
I
OUT
P
D
Topt
Tstg
Input Voltage
Input Voltage (CE Pin)
Output Voltage
Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Item
Rating
6.5
6.5
−0.3 ∼
V
IN
+0.3
140
150
−40 ∼
85
−55 ∼125
Unit
V
V
V
mA
mW
°C
°C
3
R1141Q
ELECTRICAL CHARACTERISTICS
•
R1141Qxx1B/R1141Qxx1D
Topt=25°C
Symbol
V
OUT
I
OUT
∆V
OUT
/∆I
OUT
V
DIF
I
SS
Istandby
∆V
OUT
/∆V
IN
Item
Output Voltage
Output Current
Load Regulation
Dropout Voltage
Supply Current
Supply Current (Standby)
Line Regulation
Conditions
Min.
Typ.
Max.
V
OUT
×1.015
(+30mV)
Unit
V
mA
mV
V
OUT
V
IN
= Set V
OUT
+1.0V
×0.985
1mA
<
I
OUT
<
30mA(Note1)
=
=
(-30mV)
V
IN
- V
OUT
=1.0V
120
V
IN
= Set V
OUT
+1.0V
12
40
1mA
<
I
OUT
<
120mA
=
=
Refer to the ELECTRICAL CHARACTERISTICS
by OUTPUT VOLTAGE
V
IN
= Set V
OUT
+1.0V
V
IN
=V
CE
=
Set V
OUT
+1.0V
Set V
OUT
+0.5V
<
V
IN
<
6.0V
=
=
I
OUT
= 30mA
(In case that V
OUT
<
1.6V,
=
2.2V
<
V
IN
<
6.0V)
=
=
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)
2.2
I
OUT
=30mA
−40°C
<
Topt
=
V
OUT
=0V
0.7
1.5
0.0
BW=10Hz to 100kHz
V
CE
=0V
30
60
<
=
90
0.1
0.02
160
1.0
0.10
µA
µA
%/V
RR
Ripple Rejection
75
(70)
(Note2)
6.0
±100
40
2.0
8.0
V
IN
0.3
dB
V
IN
∆V
OUT
/∆T
I
LIM
R
PU
V
CEH
V
CEL
en
R
LOW
Input Voltage
Output Voltage Temperature
Coefficient
Short Current Limit
CE Pull-up resistance
CE Input Voltage “H”
CE Input Voltage “L”
Output Noise
Low Output Nch Tr. ON
Resistance (of D version)
<
=
V
ppm/
°C
mA
MΩ
V
V
µVrms
Ω
85°C
Note 1: ±30mV Tolerance at V
OUT
Note 2: 70dB at V
OUT
>
=
2.0V
2.5V
4
R1141Q
•
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Dropout Voltage
Output Voltage
V
OUT
(V)
V
DIF
(V)
Condition
V
OUT
= 1.5
V
OUT
= 1.6
V
OUT
= 1.7
1.8
2.1
2.8
<
=
<
=
<
=
Typ.
0.36
0.32
Max.
0.70
0.60
0.50
0.40
0.35
0.28
V
OUT
V
OUT
V
OUT
<
=
<
=
<
=
I
OUT
= 120mA
2.0
2.7
4.0
0.30
0.28
0.24
0.18
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 lines sufficient. When their impedance is high, picking up the noise or unstable operation
may result. 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 as short
as possible.
5
嵌入式系统
