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PDF UTCLM2954 Data sheet ( Hoja de datos )
| Número de pieza | UTCLM2954 | |
| Descripción | 300 mA LOW-DROPOUT VOLTAGE REGULATOR | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UTCLM2954 LINEAR INTEGRATED CIRCUIT
300 mA LOW-DROPOUT VOLTAGE
REGULATOR
DESCRIPTION
The UTC LM2954 is a monolithic integrated voltage
regulator with low dropout voltage, and low quiescent current.
It includes many features that suitable for different
applications.
Available in 3-pin TO-92,DIP-8,SOP-8 and SOT-223
packages.
FEATURES
*High accuracy 3.3, 5V fixed output for
TO-92, DIP-8 and SOP-8 package.
*Extremely low quiescent current and dropout voltage.
*Extremely tight load and line regulation.
*Current and thermal limiting.
*Very low temperature coefficient.
*Logic controlled shutdown and error flag available for DIP
and SOP package.
*Output voltage programmable for DIP and SOP package.
APPLICATIONS
*Battery powered equipment.
*High efficient linear regulator down to 1.24V.
*Cellular phones.
1
1
SOT-223
TO-92
SOP-8
DIP-8
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
UTC LM2954-5.0
-40°C ~ +125°C
UTC LM2954-3.3
-40°C ~ +125°C
UTC LM2954
-40°C ~ +125°C
UTC LM2954
-40°C ~ +125°C
PACKAGE
3-Pin TO-92 plastic
3-Pin TO-92 plastic
8-Pin SOP-8 plastic
8-Pin DIP-8 plastic
ACCURACY
1.0%
1.0%
1.0%
1.0%
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R102-002,B
1 page  
UTCLM2954 LINEAR INTEGRATED CIRCUIT
PARAMETER
Input Logic Voltage
Shutdown Pin Input
Current
Regulator Output
Current Shutdown
PART NUMBER
TEST CONDITIONS
Low(Regulator ON)
High(Regulator OFF)
Vshutdown=2.4V
Vshutdown=30V
Vshutdown>=2V,VIN<=30V,
Vout=0,
Feedback pin tied to 5V Tap.
MIN. TYP.
1.3
2.0
30
450
3
MAX.
0.70
50
600
10
UNIT
V
µA
µA
µA
Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
(Vout=5V) and Vshutdown<=0.8V.
Note 2: 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.
Note 3: Comparator thresholds are expressed in terms of percentage value of voltage output.
Note 4: Vref≤Vout≤(Vin-1V), 2.3V≤Vin≤30V, 100µA≤IL≤100mA, TJ≤TJMAX
APPLICATION CIRCUIT (10A LOW DROPOUT REGULATOR)
CURRENT
LIMIT
SECTION
680Ω
2N3906
4.7MΩ
20kΩ
220Ω
0.033 µF
+VIN=Vout+0.5V
0.05Ω
470Ω
UTC
D65H0
8
+VIN
ERROR
5
UTC LM2954
3 SD
FB 7
GND Vout
41
47Ω
10kΩ
R1
R2
1%
+VOUT 10 A
4.7 µF 100 µF
Vout=1.23V*(1+R1/R2)
For 5V output use internal resistors.Wire pin 6 to 7
and wire pin 2 to +Vout
Fig.2
UTC
UNISONIC TECHNOLOGIES CO., LTD. 5
QW-R102-002,B
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet UTCLM2954.PDF ] | |
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