L11815A.pdf 데이터시트 (총 6 페이지) - 파일 다운로드 L11815A 데이타시트 다운로드

No Preview Available !

UNISONIC TECHNOLOGIES CO., LTD
L11815A
Preliminary
1.5A CMOS LDO
CMOS IC
„ DESCRIPTION
The UTC L11815A is a COMS linear regulator. One of it’s
feature is very low quiescent current typical as low as 45μA
and its dropout voltage is extremely low with 1.5A output
current.
The internal circuit includes thermal shutdown and current
fold-back mechanism to prevent device failure when the circuit
is operated in the bad conditions.
In application, the UTC L11815A needs a low noise,
regulated supply. For stable operation, the output capacitance
value should be 4.7μF or more.
The UTC L11815A is an ideal for battery applications,
such as instrumentations, portable electronics, wireless
devices, PC peripherals, and battery powered widgets. The
output voltage values are set during manufacturing and the
accuracy is tighten 1.5%.
„ FEATURES
* Quiescent Current (45μA typ.)
* Very Low Dropout Voltage
* Guaranteed 1.5A output
* Accuracy : ±1.5%
* Over-Temperature ShutDown
* With Current Limiting
* Short Circuit Current Fold-Back
* Low Temperature Coefficient
„ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
Package
L11815AL-xx-AA3-x-R L11815AG-xx-AA3-x-R SOT-223
L11815AL-xx-TN3-x-R L11815AG-xx-TN3-x-R
TO-252
L11815AL-xx-TQ2-x-R L11815AG-xx-TQ2-x-R
TO-263
Note: Pin Assignment: G:GND O:VOUT I:VIN
xx: Output Voltage, refer to Marking Information.
Pin Assignment
A: GOI
D: IGO
Packing
Tape Reel
www.DataSheet4U.com
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-346.d

No Preview Available !

L11815A
„ MARKING INFORMATION
PACKAGE
VOLTAGE CODE
Preliminary
SOT-223
TO-252
TO-263
15: 1.5V
19: 1.9V
25: 2.5V
28: 2.8V
MARKING
CMOS IC
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R502-346.d

No Preview Available !

L11815A
„ BLOCK DIAGRAM
Preliminary
CMOS IC
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
3 of 6
QW-R502-346.d

No Preview Available !

L11815A
Preliminary
CMOS IC
„ ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
Output Voltage
VIN
VOUT
-0.3 ~ +8
GND - 0.3 ~ VIN + 0.3
V
V
Power Dissipation
PD Internally limited
Junction Temperature
Operating Temperature
TJ
TOPR
150
- 40 ~ +85
°C
°C
Storage Temperature
TSTG
- 65 ~ +150
°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.
„ THERMAL DATA
PARAMETER
Junction to Case
TO-252
TO-263
SOT-223
SYMBOL
θJA
RATINGS
103
62.5
140
UNIT
°C/W
„ ELECTRICAL CHARACTERISTICS (VIN = VO(Nom) +2V , Ta = 25°C, unless otherwise specified.)
PARAMETER
Input Voltage
Output Voltage Accuracy
Line Regulation
Load Regulation
Output Current
Current Limit
Short Circuit Current
Quiescent Current
Ground Pin Current
Dropout Voltage
Over Temperature Shutdown
Over Temperature Hysteresis
Temperature Coefficient of
Output Voltage
Power Supply Rejection
Output Voltage Noise
Note: VIN(MIN)=VOUT+VD
SYMBOL
VIN
VOUT
ΔVOUT
VOUT
ΔVOUT
VOUT
IOUT
ILIMIT
ISC
IQ
IGND
VD
OTS
OTH
TEST CONDITIONS
IO=1mA
IOUT=1mA
VIN=VOUT+1~ VOUT+2
IOUT=1mA ~ 1500mA
VOUT<2.0V
VOUT2.0V
VIN= VO(NOM)+1V, VOUT<0.4V
IOUT=0mA
IOUT=1mA ~ 1500mA
IOUT=1.5A
VO(NOM)2.0V
VOUT=VO(NOM)-2.0%
VO(NOM)>2.0V
MIN
Note
-1.5
-0.15
-0.1
-1
1500
1500
TCVO
PSRR
eN
f=100Hz
IOUT=100mA, CO=4.7µF f=1kHz
f=10kHz
f=10Hz ~ 100kHz, IOUT=10mA, Co=4.7µF
TYP
0.02
0.2
2000
750
45
45
150
30
30
70
50
20
30
MAX
7
1.5
0.15
0.1
UNIT
V
%
%
%
1%
70
1300
800
mA
mA
mA
µA
µA
mV
mV
°C
°C
ppm/°C
dB
dB
dB
µVrms
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 6
QW-R502-346.d

No Preview Available !

L11815A
Preliminary
CMOS IC
„ DETAILED DESCRIPATION
The UTC L11815A of CMOS regulators insist of a PMOS pass transistor, voltage reference, error amplifier,
over-current protection, and thermal shutdown.
The error amplifier, over-current shutdown, and thermal protection circuits provides data for P-channel pass
transistor. The error amplifier takes output voltage for a precision reference in the normal operation and the normal
operation is restored when the junction temperature drops below 120°C.Over-current and Thermal shutdown circuits
start to work when the junction temperature is higher than 150 °C, or the current exceeds 2.2A. The output voltage
stays low when the thermal shutdown is in active.
The UTC L11815A behaves like a current source when the load reaches 2.2A. But the current would fall back to
600mA to prevent excessive power loss when the load impedance value is below 0.3.Normal operation is restored
when the load resistance value is higher than 0.75 .
„ EXTERNAL CAPACITORS
The UTC L11815A has an output capacitor to ground of 4.7μF or more in the stable operation. Ceramic
capacitors can provide the lowest ESR with the best AC performance. Aluminum Electrolytic capacitors, in contrast,
have the highest ESR with poorest AC response. Unfortunately, large value ceramic capacitors are comparatively
expensive. So we can parallel a 0.1μF ceramic capacitor with a 10μF Aluminum Electrolytic. The result is low ESR,
high capacitance, and low overall cost.
A second capacitor is recommended between the input and ground to stabilize input voltage. To get an ideal
effect the value of the input capacitor should be at least 0.1μF.
All capacitors should be placed in close proximity to the pins. This can be achieved with a star connection.
www.DataSheet4U.com
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-346.d