L1138G-25-S08-R [UTC]
Fixed Positive LDO Regulator, 2.5V, CMOS, PDSO8,;型号: | L1138G-25-S08-R |
厂家: | Unisonic Technologies |
描述: | Fixed Positive LDO Regulator, 2.5V, CMOS, PDSO8, 光电二极管 输出元件 调节器 |
文件: | 总7页 (文件大小:255K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L1138
Preliminary
CMOS IC
HIGH OUTPUT CURRENT CMOS
VOLTAGE REGULATOR WITH
HIGH RIPPLE-REJECTION AND
LOW DROPOUT
SOP-8
1
DESCRIPTION
The UTC L1138 is a positive LDO voltage regulator using CMOS
technology. It is featured as: low dropout voltage, high output voltage
accuracy, and low current consumption.
SOT-89-5
The internal circuits include a low on-resistance transistor to provide
a low dropout voltage and large output current; an overcurrent protector
to make sure the load current don’t exceed the current capacitance of
the output transistor, a thermal shutdown circuit to escape device
damage from over-heat, and an ON/OFF circuit to keep the battery life
longer.
In applications, the UTC L1138 can be used in power supply unit for
DVD,
CD-ROM
drives,
battery-powered
devices,
personal
communication devices, and NBs.
FEATURES
* Output voltage‘s high accuracy: ±1.0%
* Low dropout voltage:
120mV typ.
@3.0V output , IOUT=300mA
* Low current consumption:
* High current capability:
80μA(Typ.)160μA max in operation
0.1μA(Typ.)1.0μA max in shutdown mode
800mA output
@VIN≥VOUT(S)+1.0V
* With ON/OFF circuit:
* High ripple rejection
Ensures long battery life.
70dB typ@1.0kHz
* With over current protector
* With thermal shutdown circuit
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
L1138L-xx-AB5-R
L1138L-xx-S08-R
L1138G-xx-AB5-R
L1138G-xx-S08-R
SOT-89-5
SOP-8
Tape Reel
Tape Reel
xx: Output Voltage, refer to Marking Information.
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L1138
Preliminary
CMOS IC
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
SOT-89-5
12 :1.2V
25 :2.5V
28 :2.8V
35 :3.5V
U T C
Date Code
L: Lead Free
L 1 1 3 8
SOP-8
G: Halogen Free
Voltage Code
Lot Code
PIN CONFIGURATION
PIN DESCRIPTION
FOR SOT-89-5 Package
PIN NO.
PIN NAME
ON/OFF
GND
DESCRIPTION
1
2
3
4
5
Shutdown Pin
Ground Pin
NC
No Connection, NC pin is electrically open and can be connected VIN and VSS
VIN
Input voltage Pin
VOUT
Output voltage Pin
FOR SOP-8 Package
PIN NO.
1,2,3
4
PIN NAME
DESCRIPTION
Output voltage Pin (Note 1)
Ground Pin
VOUT
GND
5
ON/OFF
VIN
Shutdown Pin
6,7,8
Input voltage Pin (Note 2)
Note: 1.Short pins 1, 2 ,3
2.Short pins 6, 7, 8
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L1138
Preliminary
CMOS IC
BLOCK DIAGRAM
VIN
Overcurrent Protector
Thermal Shutdown
Reference
Voltage Circuit
-
Parasitic
diode
+
ON/OFF
Circuit
VOUT
ON/OFF
VSS
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L1138
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING(TA = 25°C, unless otherwise specified)
PARAMETER
SYMBOL
VIN
RATINGS
VSS -0.3~VSS+7
VSS -0.3~VIN+0.3
VSS -0.3~VIN+0.3
Internally limited
-40~+85
UNIT
V
Input Voltage
VON/OFF
VOUT
V
Output Voltage
V
Power Dissipation
PD
mW
°C
°C
Operating Temperature
Storage Temperature
TOPR
TSTG
-40~+125
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 (Ta = 25°C, VIN=VOUT+1V, unless otherwise specified)
Parameter
SYMBOL
VIN
TEST CONDITIONS
MIN TYP MAX UNIT
Input Voltage
6.5
V
V
Output Voltage (Note 1)
VOUT(E)
∆VOUT1
VIN =VOUT(S)+1.0V,IOUT =100mA
-1%
800
+1%
V
I
OUT(S) + 0.5V ≤VIN ≤6.5V,
OUT = 100mA
IN = VOUT(S) + 1.0 V,
1.0mA ≤IOUT ≤300mA
VIN ≤VOUT(S)+1.0 V
Line Regulation
0.05 0.3
%/V
∆V × VOUT
IN
V
Load Regulation
∆VOUT2
IOUT
30
100
mV
mA
µA
Output Current (Note 2)
V
IN = VOUT(S) +1.0 V,
ON/OFF pin = ON, no load
IN = VOUT(S) + 1.0 V,
ON/OFF pin = OFF, no load
IN = VOUT(S) + 1.0 V,
ON/OFF pin = ON, VOUT = 0 V
OUT(S) =1.2V
Operation
Shutdown
ISS1
80
160
1.0
Current Consumption
During
V
ISS2
0.1
µA
V
Short-Circuit Current
ISHORT
350
0.8
mA
V
1.0
VOUT(S) =2.5V
VOUT(S) =2.8V
VOUT(S) =3.5V
0.15 0.22
0.15 0.22
0.12 0.18
Dropout Voltage (Note 3)
VD
IOUT = 300mA
V
Temperature Coefficient of
Output Voltage
V
IN = VOUT(S) +1.0V,
ppm/°
C
TCVO
PSRR
±150
70
I
OUT = 10mA, -40°C≤ Ta ≤85°C
VIN= VOUT(S)+1.0 V
f = 1.0kHz,
1.2 V ≤VOUT(S)≤ 3.0 V
3.1 V ≤VOUT(S)≤ 5.5 V
Power Supply Rejection
dB
I
OUT = 100 mA
65
∆Vrip = 0.5Vrms
High
VSH
VSL
ISH
VIN = VOUT(S) +1.0V
VIN = VOUT(S) + 1.0V
1.5
V
Shutdown Pin Input
Voltage
Low
High
0.3
0.1
V
VIN = 6.5V, VON/OFF = 6.5V
VIN = 6.5V, VON/OFF = 0V
Junction temperature
Junction temperature
-0.1
-0.1
µA
µA
°C
°C
Shutdown Pin Input
Current
Low
Detection
ISL
0.1
TSD
TSR
150
Thermal Shutdown
Temperature
Release
120
Notes: 1.VOUT(S): Specified output voltage.
VOUT(E): Actual output voltage at the fixed load
When fixing( IOUT= 100mA) and inputting VOUT(S) + 1.0 V
2.This output current means the one at which the output voltage becomes 98% of VOUT(E) after gradually
increasing the output current.
3.The dropant voltage is detmed as VIN - VOUT, which is measured when VOUT is VOUT(normal) × 98%
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L1138
Preliminary
CMOS IC
OPERATION
1. Basic operation
The reference voltage (VREF) and VFB(the output voltage resistance-divided by feedback resistors RS and RF)
are the input for the error amplifier.
2. Output transistor
A low on-resistance P-channel MOSFET is used as the output transistor. Inverse current flowing from VOUT pin
through a parasitic diode to VIN pin can damage the regulator, so be sure that VOUT does not exceed VIN + 0.3V.
3. Shutdown pin (ON/OFF pin)
The shutdown pin can start and stop the regulator.The shutdown mode set by this pin can stop the operation
of all internal circuits. The structure of the ON/OFF pin is shown in Fig. 1. When the ON/OFF pin is not used,
connect it to the VSS pin if the logic type is “A” and to the VIN pin if it is “B”.
Logic Type
ON/OFF Pin
“L”: Power on
“H”: Power off
“L”: Power off
“H”: Power on
Internal Circuits
Operating
Stopped
VOUT Pin Voltage
Set value
Current Consumption
A
A
B
B
ISS1
ISS2
ISS2
ISS1
VSS level
Stopped
VSS level
Operating
Set value
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L1138
Preliminary
CMOS IC
TEST CIRCUITS
1. Output Voltage Test
2. Current Consumption Test
3. Output Current Test
4. Shutdown Pin Input Voltage / Current Test
5. Power Supply Rejection Test
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L1138
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
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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