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Электронный компонент: R1141Q281D

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'2001.5.7
SC82 120mA LDO REGULATOR
R1141Q SERIES
Rev. 1.10
- 1 -
s
OUTLINE
The R1141Q Series are voltage regulator ICs with high output voltage accuracy, 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 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, 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.
s
FEATURES
Ultra-Low Supply Current......................................... TYP. 90
A
Standby Mode ........................................................... TYP. 0.1
A
Low Dropout Voltage ................................................ TYP. 0.15V(I
OUT
=100mA Output Voltage=3.0V Type)
High Ripple Rejection ............................................... TYP. 75dB(V
OUT
2.4V),70dB(V
OUT
2.5V) (f=1kHz)
Low Temperature-Drift Coefficient of Output Voltage TYP. 100ppm/
C
Excellent Line Regulation ......................................... TYP. 0.05%/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 (Current at short mode)
Ceramic capacitor can be used for Output pin..........Recommended value is 2.2
F or more.
s
APPLICATIONS
Power source for cellular phones such as GSM, CDMA and various kinds of PCS.
Power source for electrical appliances such as cameras, VCRs, camcorders, and hand-held communication equipment.
Power source for battery-powered equipment.
Very stable Voltage Reference
Rev. 1.10
- 2 -
s
BLOCK DIAGRAM
R1141QXX1B
R1141QXX1D
V
DD
V
OUT
GND
4
3
2
1
Vref
Current Limit
+
-
CE
V
OUT
CE
V
DD
GND
4
3
2
1
Vref
Current Limit
+
-
s
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
Part Number
a b c d
Code
Contents
a
Designation of Package Type :
Q:SC82-AB (Super Mini-mold)
b
Setting Output Voltage (V
OUT
) :
Stepwise setting with a step of 0.1V in the range of 1.5V to 4.0V is possible.
c
Designation of Mask Option :
B: Without auto discharge function at OFF state.
D: With auto discharge function at OFF state.
d
Designation of Taping Type :
Ex. TR, TL (refer to Taping Specifications; TR type is the standard direction.)
Rev. 1.10
- 3 -
s
PIN CONFIGURATION
SC-82AB
Mark side
1
2
3
4
s
PIN DESCRIPTION
Pin No.
Symbol
Description
1
V
OUT
Output pin
2
GND
Ground Pin
3
CE
Chip Enable Pin
4
V
DD
Input Pin
s
ABSOLUTE MAXIMUM RATINGS
Item
Symbol
Rating
Unit
Input Voltage
V
IN
6.5
V
Input Voltage(CE Pin)
V
CE
-0.3 ~ V
IN
+0.3
V
Output Voltage
V
OUT
-0.3 ~ V
IN
+0.3
V
Output Current
I
OUT
140
mA
Power Dissipation
P
D
150
mW
Operating Temperature Range
Topt
-40 ~ 85
C
Storage Temperature Range
Tstg
-55 ~ 125
C
Rev. 1.10
- 4 -
s
ELECTRICAL CHARACTERISTICS
q
R1141QXX1B/R1141QXX1D
Topt=25
C
Symbol
Item
Conditions
MIN.
TYP.
MAX.
Unit
V
OUT
Output Voltage
V
IN
= Set V
OUT
+1V
1mA
I
OUT
30mA(Note 1)
V
OUT
0.985
(-30mV)
V
OUT
1.015
(+30mV)
V
I
OUT
Output Current
V
IN
- V
OUT
= 1.0V
120
mA
V
OUT
/
I
OUT
Load Regulation
V
IN
= Set V
OUT
+1V
1mA
I
OUT
120mA
12
40
mV
V
DIF
Dropout Voltage
Refer to the ELECTRICAL CHARACTERISTICS by OUTPUT
VOLTAGE
I
SS
Supply Current
V
IN
= Set V
OUT
+1V
90
160
A
Istandby
Supply Current (Standby)
V
IN
= V
CE
= Set V
OUT
+1V
0.1
1.0
A
V
OUT
/
V
IN
Line Regulation
Set V
OUT
+0.5V
V
IN
6V
I
OUT
= 30mA
(In case that V
OUT
1.6V,
2.2V
V
IN
6V)
0.05
0.10
%/V
RR
Ripple Rejection
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)
75
(70)
(Note 2)
dB
V
IN
Input Voltage
2.2
6.0
V
V
OUT
/
T
Output Voltage
Temperature Coefficient
I
OUT
= 30mA
-40
C
Topt
85
C
100
ppm
/
C
Ilim
Short Current Limit
V
OUT
= 0V
40
mA
R
PU
CE Pull-up Resistance
0.7
2.0
8.0
M
V
CEH
CE Input Voltage "H"
1.5
V
IN
V
V
CEL
CE Input Voltage "L"
0.0
0.3
V
e
n
Output Noise
BW=10Hz to 100kHz
30
Vrms
R
LOW
Low Output Nch Tr. ON
Resistance (of D version)
V
CE
=0V
60
Note 1:
30mV Tolerance at V
OUT
2.0V
Note 2:70dB at V
OUT
2.5V
q
ELECTRICAL CHARACTERISTICS by OUTPUT VOLTAGE
Topt = 25
C
Dropout Voltage
V
DIF
(V)
Output Voltage
V
OUT
(V)
Condition
TYP.
MAX.
V
OUT
= 1.5
0.36
0.70
V
OUT
= 1.6
0.32
0.60
V
OUT
= 1.7
0.30
0.50
1.8
V
OUT
2.0
0.28
0.40
2.1
V
OUT
2.7
0.24
0.35
2.8
V
OUT
4.0
I
OUT
= 120mA
0.18
0.28
Rev. 1.10
- 5 -
s
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 2.2
F 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 VDD 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 1.0
F 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.
s
TEST CIRCUITS
C2 = Ceramic 2.2
F
*
C1 = Ceramic 1.0
F
C1
V
OUT
C2
GND
CE
V
OUT
V
DD
3
4
R1141Q
SERIES
I
OUT
1
2
V
Fig.1 Standard test Circuit
C2 = Ceramic 2.2
F
*
C1 = Ceramic1.0
F
A
I
SS
C1
C2
GND
CE
V
OUT
V
DD
3
4
R1141Q
SERIES
1
2
Fig.2 Supply Current Test Circuit