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UNISONIC TECHNOLOGIES CO.,LTD.
RXXLD10
LINEAR INTEGRATED CIRCUIT
LOW VOLTAGE OPERATION
LOW POWER-LOSS VOLTAGE
REGULATORS
FEATURES
* Low voltage operation (Minimum operating voltage: 2.35V) 2.5V
input available 1.5 ~ 1.8V
* Low dissipation current
* Built-in overcurrent protection and over temperature protection
functions
EQUIVALENT
1
TO-252-5
1
Specific IC
5
3
2
*Pb-free plating product number: RXXLD10L
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
PIN NAME
INPUT
ON/OFF
OUTPUT
NC
GND
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
Package
RXXLD10-TN5-R RXXLD10L-TN5-R TO-252-5
Note: xx: Output Voltage, refer to Marking Information.
Packing
Tape Reel
MARKING INFORMATION
PACKAGE VOLTAGE CODE
TO-252-5
15:1.5V
18:1.8V
25:2.5V
03:3.0V
33:3.3V
MARKING
VOLTAGE CODE
UTC
RXXLD10L
Space :Pb/Sn
L: Pb-fr ee
DATE CODE
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co.,LTD.
1
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RXXLD10
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta = 25)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN 10 V
ON/OFF Control Terminal Voltage (Note 2)
VC
10
V
Output Current
IOUT 1.0 A
Power Dissipation (with infinite heat sink)
Junction Temperature
Operating Temperature
Storage Temperature
PD
TJ
TOPR
TSTG
8
125
-20 ~ +85
-40 ~ +150
W
Note 1.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.
2: All are open except GND and applicable terminals.
3.The device is guaranteed to meet performance specification within 0~70operating temperature range
and assured by design from –20~85.
ELECTRICAL CHARACTERISTICS
(VIN = VO (TYP.)+1V, IOUT = 0.5A, VC = 2.7V, Ta = 25, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
R15LD10
2.35 10
R18LD10
2.35 10
Input Voltage
R25LD10
R03LD10
R33LD10
VIN
VOUT+0.5
VOUT+0.5
VOUT+0.5
10 V
10
10
R15LD10
1.45 1.5 1.55
R18LD10
1.75 1.8 1.85
Output Voltage
R25LD10
VOUT
2.438 2.5 2.562 V
R03LD10
2.925
3 3.075
R33LD10
3.218 3.3 3.382
Voltage for Control
(Note 1)
ON
OFF
VC (ON)
VC (OFF)
2V
0.8 V
Current for Control
ON
OFF
IC (ON)
IC (OFF)
VC = 0.4V
200 µA
2 µA
Quiescent Current
IQ IOUT = 0A
1 2 mA
Output Off-state Dissipation Current
Load Regulation
IQS IOUT = 0A, VC = 0.4V
VOUT IOUT = 5mA ~ 1A
5 µA
0.2 2 %
Line Regulation
VOUT
VIN = VO (TYP.)+1V~VO (TYP.)+6V
IOUT = 5mA
0.1 1 %
Dropout Voltage(Note 2)
VD IOUT = 0.5A
0.2 0.5 V
Temperature Coefficient of Output
Voltage
TC VO TJ = 0 ~ 125°C, IOUT = 5mA
±0.01
%/
Ripple Rejection
RR Refer to Fig.2
45 60
dB
Note 1: In case of opening control terminal pin 2, output voltage turns off.
2: Input voltage shall be the value when output voltage is 95% in comparison with the initial value.
UNISONIC TECHNOLOGIES CO., LTD
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RXXLD10
TEST CIRCUIT
VIN
0.33μF
LINEAR INTEGRATED CIRCUIT
13
2
5
A IQ
Vc
A Ic
VOUT
+
47μF
A IoUT
V
RL
ei ~
V IN
Fig.1
13
0.33μF
Vc
2
5
2.7V
+
47μF
IOUT
RL
+
eo
V
f = 120Hz (sine wave), ei (rms) = 0.5V, VIN = VO (TYP)+2V, IOUT = 0.5A, RR = 20log (ei (rms) /eo (rms))
Fig.2 For Ripple Rejection
TYPICAL APPLICATION CIRCUIT
1
3
VoUT
VIN CIN
2
5
Co +
Load
ON/OFF signal
High : Output ON
Low or open: Output OFF
UNISONIC TECHNOLOGIES CO., LTD
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RXXLD10
TYPICAL CHARACTERISTICS
Power Dissipation vs . Ambient
10
PD : With infinite heat sink
8
5
0
-40 -20 0
20 40 60
Ambient Temperature, Ta ()
80
Overcurrent Protection Characteristics
(R18LD10)
1.8 VIN = 2.35V
1.6 VIN = 3V
VIN = 3.3V
1.4
1.2 VIN = 2.5V
1
0.8
0.6
VIN = 5V
0.4
0.2
0
0
0.5 1 1.5
Output Current, IoUT (A)
2
Overcurrent Protection Characteristics
(R03LD10)
3
2.5
VIN = 10V
2
VIN = 7V
1.5 VIN = 5.5V
VIN = 5V
1 VIN = 4.5V
0.5
0
0 0.5 1 1.5 2
Output Current, IoUT (A)
LINEAR INTEGRATED CIRCUIT
Overcurrent Protection Characteristics
(R15LD10)
1.5
VIN = 2.35V
VIN = 3V
1.2
VIN = 2.5V
0.9
VIN = 3.3V
0.6
VIN = 5V
0.3
0
0 0.5 1 1.5 2
Output Current, IoUT (A)
Overcurrent Protection Characteristics
(R25LD10)
2.5
VIN = 3V
VIN = 3.3V
2
VIN = 3.6V
1.5
VIN = 5V
1 VIN = 4.5V
0.5
0
0 0.5 1 1.5 2
Output Current, IoUT (A)
Overcurrent Protection Characteristics
(R33LD10)
3.5
3
2.5
2
1.5
1
0.5
0
0
VIN = 10V
VIN = 7V
VIN = 5.5V
VIN = 5V
VIN = 4.5V
0.5 1 1.5
Output Current, IoUT (A)
2
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RXXLD10
TYPICAL CHARACTERISTICS(cont.)
Output Voltage vs. Ambient Temperature
(R15LD10)
1.55
1.54
1.53
VIN = 2.5V
VC = 2.7V
IoUT = 0.5A
1.52
1.51
1.5
1.49
1.48
1.47
1.46
1.45
-50
-25 0 25 50 75 100 125
Ambient Temperature, Ta ()
2.525
2.52
2.515
Output Voltage vs. Ambient Temperature
(R25LD10)
VIN = 3.5V
VC = 2.7V
IoUT = 0.5A
2.51
2.505
2.5
2.495
2.49
2.485
2.48
2.475
-50
-25 0 25 50 75 100 125
Ambient Temperature, Ta ()
Output Voltage vs. Ambient Temperature
(R33LD10)
3.35
3.34
3.33
VIN = 4.3V
VC = 2.7V
IoUT = 0.5A
3.32
3.31
3.3
3.29
3.28
3.27
3.26
3.25
-50
-25 0 25 50 75 100
Ambient Temperature, Ta ()
125
LINEAR INTEGRATED CIRCUIT
Output Voltage vs. Ambient Temperature
(R18LD10)
1.85
1.84
1.83
VIN = 2.8V
VC = 2.7V
IoUT = 0.5A
1.82
1.81
1.8
1.79
1.78
1.77
1.76
1.75
-50
-25 0 25 50 75 100 125
Ambient Temperature, Ta ()
Output Voltage vs. Ambient Temperature
(R03LD10)
3.05
3.04
3.03
VIN = 4V
VC = 2.7V
IoUT = 0.5A
3.02
3.01
3
2.99
2.98
2.97
2.96
2.95
-50
-25 0 25 50 75 100 125
Ambient Temperature, Ta ()
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
Output Voltage vs. Input Voltage
(R15LD10)
RL = 1.5Ω(IoUT = 1A)
RL = 3Ω(IoUT = 0.5A)
RL = Ω(IoUT = 0A)
VC = 2.7V
Ta = Room temp.
CIN = 0.33μF
Co = 47μF
12 345
Input Voltage, VIN (V)
UNISONIC TECHNOLOGIES CO., LTD
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QW-R102-025,A