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参数资料
| 型号： | LX8819-25CDT |
| 厂商： | MICROSEMI CORP |
| 元件分类： | Fixed/Adjustable Positive Multiple Output LDO Regulator |
| 英文描述： | DUAL OUTPUT, FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, PSSO5 |
| 封装： | PLASTIC, TO-252, D-PAK, 5-PIN |
| 文件页数： | 3/9页 |
| 文件大小： | 305K |
| 代理商： | LX8819-25CDT |
LX8819
DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
WWW
.Microse
m
i
.CO
M
Dual Channel 1A Low Dropout Regulator
Copyright
2003
Revision 1.0a, 4/29/2005
TM
RECOMM END E D O P ERATI NG CONDI T I ONS
LX8819
Parameter
Symbol
Min
Typ
Max
Units
Input Voltage - 3.3V
VIN
4.5
10
V
Input Voltage - 2.5V < 200mA Load
3.5
10
V
Output Voltage (Adjustable)
VOUT
5
V
Load Current (Each Output)
1
IOUT
0
1000
mA
Input Capacitor (VIN to GND)
CIN
2.2
20
F
Output Capacitor (VOUTx to GND)
2
COUT
1.0
10
F
Note
1: Care should be taken so as to not exceed the thermal dissipation capability of the package
2: Size your output capacitor to meet the transient loading requirement. If you have a very dynamic load, a lower ESR and larger value
capacitor will improve the response to these load steps.
ELECTRI CAL CHA RACTERI S TI CS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°C ≤ TA ≤ 125°C except where
otherwise noted and with the following test conditions: VIN = 5V, IOUT = 10mA, CIN= 10F (Tantalum), COUT = 4.7F (Tant.), and TJ = TA
using low duty cycling methods.
LX8819
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
ADJUSTABLE OUTPUT (VOUT1)
Reference Voltage
VREF
5mA < IOUT1 < 1A, 4.75V < VIN < 5.5V
1.225
1.25
1.275
V
Line Regulation
VREF(VIN) 3.75V < VIN < 5.5V, IOUT1 = 5mA
1.5
6
mV
Load Regulation
VREF(IOUT) 5mA < IOUT1 < 1A, VIN = 4.75V
0.18
0.36
%VOUT
Dropout Voltage
V
IOUT1 = 1A, V1 = -1%
1.3
1.46
V
Current Limit
IOUT (MAX)
1.0
1.4
A
Minimum Load Current
IL
Note 3
2
3
mA
Adjust Pin Bias Current
IADJ
-0.12
-1
A
FIXED OUTPUT (OUTPUT 2)
Output Voltage – LX8819-33
5mA < IOUT2 < 1A, 4.75V < VIN < 5.5V
3.217
3.30
3.383
Output Voltage – LX8819-25
VOUT
5mA < IOUT2 < 0.2A, 3.75V < VIN < 5.5V
2.437
2.5
2.562
V
Line Regulation
VOUT(VIN) 4.75V < VIN < 5.5V, IOUT2 = 5mA
6
8
mV
Load Regulation
VOUT(IOUT) 5mA < IOUT2 < 1A, VIN = 4.75V
6
12
mV
IOUT2 = 1A, V2 = -1%
1.25
1.41
V
Dropout Voltage
V
IOUT2 = 0.2A, V2 = -1%
1.25
V
Current Limit
IOUT (MAX)
1.0
1.4
A
Minimum Load Current
IOUT
0
mA
ENTIRE REGULATOR
VIN < 5.5V, IOUT1 = 5mA, IOUT2 = 5mA
2.6
4.2
Quiescent Current
IQ
VIN < 5.5V, IOUT1 = 1A, IOUT2 = 1A
3.5
5
mA
-3.3 Voltage Rising
2.5
4.5
VIN Under Voltage Lockout
Threshold
UVLO
-2.5 Voltage Rising @ 25 °C
2.5
3.6
V
VOUT Rise Time for VIN
Switched On
VOUT(tR)
80
300
s
Ripple Rejection
PSRR
f=120Hz, VIN = 5V
60
75
dB
RMS Output Noise
VOUT (RMS) 10Hz < f < 10kHz
0.003
%VOUT
Thermal Shutdown
TJSD
150
165
°C
Note
3: Minimum load current is defined as the amount of output current required to maintain regulation. , The external resistor divider current can be
included in this requirement.
PP
AA
CC
KK
AA
GG
EE
DD
AA
TT
AA
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