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LP2951CP-X 参数 Datasheet PDF下载

LP2951CP-X图片预览
型号: LP2951CP-X
PDF下载: 下载PDF文件 查看货源
内容描述: 100mA时的低压差稳压器 [100mA Low Dropout Voltage Regulators]
分类和应用: 稳压器
文件页数/大小: 10 页 / 144 K
品牌: CALOGIC [ CALOGIC, LLC ]
 浏览型号LP2951CP-X的Datasheet PDF文件第1页浏览型号LP2951CP-X的Datasheet PDF文件第2页浏览型号LP2951CP-X的Datasheet PDF文件第4页浏览型号LP2951CP-X的Datasheet PDF文件第5页浏览型号LP2951CP-X的Datasheet PDF文件第6页浏览型号LP2951CP-X的Datasheet PDF文件第7页浏览型号LP2951CP-X的Datasheet PDF文件第8页浏览型号LP2951CP-X的Datasheet PDF文件第9页  
LP2950 / LP2951  
CORPORATION  
ELECTRICAL CHARACTERISTICS (continued)  
LP2951  
LP2950AC / LP2951AC LP2950C / LP2951C  
CONDITIONS  
PARAMETER  
UNITS  
(Note 2)  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
MIN  
TYP MAX  
ERROR COMPARATOR  
Output Leakage Current  
Output Low Voltage  
Upper Threshold Voltage  
Lower Threshold Voltage  
Hysteresis  
0.01  
150  
60  
1
0.01  
150  
60  
1
0.01  
150  
60  
1
µA  
mV  
mV  
mV  
mV  
VOH = 30V  
250  
250  
250  
VIN = 4.5V, IOL = 400µA  
(Note 7)  
40  
40  
40  
75  
95  
75  
95  
75  
95  
(Note 7)  
15  
15  
15  
(Note 7)  
SHUTDOWN INPUT  
1.3  
0.6  
1.3  
0.7  
1.3  
0.7  
V
V
Low (Regulator ON)  
High (Regulator OFF)  
Input Logic Voltage  
2
2
2
Shutdown Pin  
Input Current  
30  
675  
50  
800  
30  
675  
50  
800  
30  
675  
50  
800  
µA  
µA  
V
V
S = 2.4V  
S = 30V  
Regulator Output Current  
in Shutdown  
3
10  
3
10  
3
10  
µA  
(Note 9)  
Note 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided by the total temperature range.  
Note 2: Unless otherwise specified all limits guaranteed for TJ = 25oC, VIN = 6V, IL=100µA and CL = 1µF. Additional conditions for the 8-pin  
versions are feedback tied to 5V tap and output tied to output Sense (VOUT = 5V) and VSHUTDOWN 0.8V.  
Note 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to  
heating effects are covered under the specification for thermal regulation.  
Note 4: Line regulation for the LP2951 is tested at 150oC for IL = 1mA. For IL = 100µA and TJ = 125oC, line regulation is guaranteed by design to  
0.2%. See typical performance characteristics for line regulation versus temperature and load current.  
Note 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured  
at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be  
taken input account.  
Note 6: VREF VOUT (VIN - 1V), 2.3 VIN 30V, 100µA IL 100mA, TJ TJMAX  
Note 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below the nominal reference voltage  
measured at 6V input. To express these thresholds in terms of output voltage change, multiply by the error amplifier gain = VOUT/VREF  
.
=
(R1+R2)/R2. For example, at a programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95mV x  
5V/1.235 = 384mV. Thresholds remain constant as a percent of VOUT as VOUT is varied, with the dropout warning occurring at typically 5% below  
nominal, 7.5% guaranteed.  
Note 8: VSHUTDOWN 2V, VIN 30V, VOUT = 0, Feedback pin tied to 5V Tap.  
Note 9: All typical values are not guaranteed.  
BLOCK DIAGRAM  
UNREGULATED DC  
5V @ 100mA  
MAX  
7
8
1
+
FEEDBACK  
INPUT  
OUTPUT  
2
SENSE  
+
180kΩ  
60kΩ  
6
ERROR  
AMPLIFIER  
3
330kΩ  
5V TAP  
FROM  
CMOS  
OR TTL  
SHUTDOWN  
+
5
1µF  
+
+
60mV  
ERROR  
ERROR DETECTION  
COMPARATOR  
TO CMOS OR  
TTL  
+
1.23V  
REFERENCE  
LP2950 AND LP2951 BLOCK DIAGRAM  
4
GROUND  
1D-21  
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025