Datasheet

UNISONIC TECHNOLOGIES CO., LTD
LR7XXYY
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CMOS IC
LOW NOISE DUAL 300mA LDO

DESCRIPTION
The UTC LR7XXYY series are highly accurate, Dual, low noise,
CMOS LDO voltage regulators. Performance features of the series
includes low output noise, high ripple rejection ratio, low dropout
and very fast turn-on times.
The UTC LR7XXYY includes a reference voltage source, error
amplifiers, driver transistors, current limiters and phase
compensators internally. The LR7XXYY current limiters' foldback
circuit also operates as a short protect for the output current limiter.
The UTC LR7XXYY series is also fully compatible with low ESR
ceramic capacitors, reducing cost and improving output stability.
This high level of output stability is maintained even during
frequent load fluctuations, due to the excellent transient response
performance and high PSRR achieved across a broad range of
frequencies. The EN function allows the output of each regulator to
be turned off independently, resulting in greatly reduced power
consumption. The output voltage of these ICs is internally fixed with
high accuracy (1%).

SOP-8
FEATURES
* Supply Current
* Standby Current
* Dropout Voltage
Typ. 25µA (each channel)
Typ. 0.1µA (each channel)
Typ. 0.21V (IOUT=300mA, VOUT=2.8V)
Typ. 0.24V (IOUT=300mA, VOUT=2.5V)
* Ripple Rejection
Typ. 80dB (f=1kHz)
* Temperature-Drift Coefficient of Output Voltage Typ. ±30ppm/°C
* Line Regulation
Typ. 0.02%/V
* Output Voltage Accuracy ±1.0%
* Input Voltage Range
2.5V~5.25V
* Output Voltage Range
1.5V ~3.3V (0.1V steps)
(For details, please refer to MARK
INFORMATIONS.)
* Built-in Fold Back Protection Circuit
Typ. 50mA
* Built-in Auto Discharge Function
B Version

RDERING INFORMATION
Note:
Ordering Number
LR7XXYYAG -S08-R
XXYY: Output Voltage, refer to Marking Information.
LR7XXYYAG-S08-R
(1)Packing Type
(2)Package Type
(3)Green Package
(4)Discharge Function
(5)Voltage Code at VOUT2
(6)Voltage Code at VOUT1
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
Package
SOP-8
Packing
Tape Reel
(1) R: Tape Reel
(2) S08: SOP-8
(3) G: Halogen Free and Lead Free
(4) A: without auto-discharge function at off state
(5) YY: refer to Marking Information
(6) XX: refer to Marking Information
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CMOS IC
MARKING INFORMATIONS
PACKAGE
VOLTAGE CODE
XX
YY
18: 1.8V
25: 2.5V
18: 1.8V
33: 3.3V
MARKING
SOP-8

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PIN CONFIGURATION
CE1
1
8
VOUT1
GND
2
7
VDD
CE2
3
6
VOUT2
NC
4
5
NC
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
1
CE1
Chip Enable Pin 1
2
GND
Ground Pin
3
CE2
Chip Enable Pin 2
4
NC
No Connection
5
NC
No Connection
6
VOUT2
Output Pin 2
7
VDD
Input Pin
8
VOUT1
Output Pin 1
Notes: 1. Tab is GND level. (They are connected to the reverse side of this IC.)
2. The tab is better to be connected to the GND, but leaving it open is also acceptable.
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CMOS IC
BLOCK DIAGRAM
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CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
6.0
V
Input Voltage (CE Pin)
VCE
6.0
V
Output Voltage
VOUT
-0.3 ~ VIN+0.3
V
Output Current 1
IOUT1
400
mA
Output Current 2
IOUT2
400
mA
Power Dissipation
PD
880
mW
Operating Temperature Range
TOPR
-40 ~ 85
°C
Storage Temperature Range
TSTG
-55 ~ 125
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS
(TOPT=25°C, VIN=Set VOUT+ 1V for higher output of the regulator pair, IOUT=1mA, CIN=COUT =1µF, unless otherwise
noted)
VR1/VR
PARAMETER
Output Voltage
Output Current
Load Regulation
SYMBOL
VOUT
TEST CONDITIONS
VIN=Set VOUT+1V, VOUT>2.0V
IOUT=1mA
VOUT ≤ 2.0V
IOUT
∆VOUT/ ∆IOUT 1mA ≤ IOUT ≤ 200mA
1.5V≤Set VOUT<1.7V
1.7V≤Set VOUT<2.0V
Dropout Voltage
VDIF
IOUT=300mA
2.0V≤Set VOUT<2.5V
2.5V≤Set VOUT<2.8V
2.8V≤Set VOUT ≤ 3.3V
Supply Current
Standby Current
ISS
Istandby
Line Regulation
∆VOUT/ ∆VIN
Ripple Rejection
RR
IOUT =0V
VCE=0V
Set VOUT+0.5V≤VIN≤5.0V (In case that
VOUT ≤2.0V, 2.5V≤VIN ≤5.0)
f=1kHz, Ripple 0.2Vp-p, VIN=Set
VOUT+1V, IOUT=30mA (In case that
VOUT ≤2.0V, VIN=3V)
MIN
×0.99
-20
300
TYP
MAX
×1.01
+20
20
0.40
0.34
0.29
0.24
0.21
25
0.1
40
1.00
0.80
0.50
0.38
0.34
33
3.0
0.02
0.10
80
UNIT
V
mV
mA
mV
V
µA
µA
%/V
dB
Input Voltage (Note 1)
VIN
2.5
5.25
V
Output Voltage
∆VOUT/ ∆TOPT −40°C ≤TOPT≤ 85°C
±30
ppm/°C
Temperature Coefficient
Short Current Limit
ISC
VOUT=0V
50
mA
CE Pull-Down Current
IPD
0.05
0.3
0.6
µA
CE Input Voltage “H”
VCEH
1.5
6.0
V
CE Input Voltage “L”
VCEL
0.3
V
Output Noise
en
BW=10Hz~100kHz
30
µVrms
Low Output Nch Tr. ON
RLOW
VIN=4.0, VCE=0V
30
Ω
Resistance (B version)
Note: The maximum Input Voltage of the ELECTRICAL CHARACTERISTICS is 5.25V. In case of exceeding this
specification, the IC must be operated on condition that the Input Voltage is up to 5.5V and the total operating
time is within 500hrs.
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CMOS IC
TEST CIRCUIT
CIN, CL1, CL2 : 1µF(ceramic)
VIN
VOUT1
EN1
CIN
V
A
CL1
IOUT1
V
RL1
EN2
VOUT2
VSS
A
CL2
IOUT2
V
RL2
CL1, CL2 : 1µF(ceramic)
VIN
VOUT1
EN1
V
EN2
CL1
IOUT1
CL2
IOUT2
V
VOUT2
VSS
V
Test Circuit for Ripple Rejection
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CMOS IC
TYPICAL APPLICATION CIRCUIT(Cont.)
CIN, CL1, CL2 : 1µF(ceramic)
VIN
VOUT1
EN1
V
CIN
A
CL1
IOUT1
V
RL1
EN2
VOUT2
VSS
A
CL2
IOUT2
V
RL2
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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