UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R102-002,B
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.
ORDERING INFORMATION
PART NUMBER
TEMPERATURE RANGE
PACKAGE
ACCURACY
UTC LM2954-5.0 -40°C ~ +125°C
3-Pin TO-92 plastic 1.0% UTC LM2954-3.3 -40°C ~ +125°C 3-Pin TO-92 plastic 1.0% UTC LM2954 -40°C ~ +125°C 8-Pin SOP-8 plastic 1.0% UTC LM2954
-40°C ~ +125°C
8-Pin DIP-8 plastic
1.0%
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R102-002,B
PIN CONFIGURATIONS
UTC LM2954
TO-92 Plastic Package Bottom View
12
3
48765
INPUT
FEEDBACK
5V TAP
SHUTDOWN SENSE OUTPUT UTC LM2954
GND ERROR
SOP-8 OR DIP-8 PACKAGE
INPUT GND OUTPUT
SOT-223 PACKAGE
Fig. 1
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R102-002,B
FROM CMOS OR TTL
DC
跨栏架
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage Vcc -0.3 ~ +30 V Feedback Voltage Vfeedback -1.5 ~ +30 V Shutdown Voltage
Vshutdown
-
0.3 ~ +30 V Comparator Output Voltage Vco -0.3 ~ +30 V Storage temperature Tstr -65 ~ +150 °C Operating Junction Temperature Tj
-40 ~ +125
°C
现浇梁UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R102-002,B
ELECTRICAL CHARACTERISTICS
(Tested at Tj=25°C,V IN =6V,I L =100µA and C L =1F.unless otherwise specified)
PARAMETER PART NUMBER TEST CONDITIONS MIN.TYP.
MAX. UNIT
Output Voltage
UTC LM2954-3.3 UTC LM2954-5.0 UTC LM2954
T J =25°C (note 1) 3.274.95 3.3 5.0 3.33 5.05
V
磁带库备份UTC LM2954-3.3 UTC LM2954-5.0 UTC LM2954FOSY
-25°C<=T J <=+85°C
(note 1) 3.234.9 3.3 5.0 3.36 5.1 V UTC LM2954-3.3 UTC LM2954-5.0 UTC LM2954
100µA<=I L <=300 mA Tj<=Tj(max) (note 1) 3.234.9 3.3 5.0 3.36 5.1
V
Output Voltage Temperature Coefficient 20 100
ppm/°C Line Regulation 6V<=V IN <=30V 0.1 0.2 %
Load Regulation 100µA<=I L <=300 mA 0.2 0.5 %
Dropout Voltage I L =100mA I L =200mA (note 2) 50 38080 450 150 600
mV
Ground Current I L =100µA I L =200mA 0.75 8 0.12 12 0.14 14 mA
Dropout Ground Current V IN =4.5V,I L =100µA 110170 200 µA
Current Limit Vout=0 300 mA
Output Noise 10Hz to 100KHz C L =1µF C L =200µF C L =3.3µF (Bypass=0.01µF) pins 7 to (utc 2954 )
430 160 100 µV For 8-Pin Version Only Reference Voltage 1.22 1.235 1.25 V Reference Voltage (Note 4) 1.19 1.27 V Feedback Pin Bias Current
20 40 nA Reference Voltage Temperature Coefficient
50
ppm/°C Feedback Bias Current Temperature Coefficient 0.1
nA/°C Error Comparator
Output Leakage Current V OH =
30V 1
µA Output Low Voltage V IN =4.5V
I OL =400µA
250 mV Upper Threshold Voltage
除湿机回收(Note 3) 3.2 %V O Lower Threshold Voltage
(Note 3) 7.6 %V O Hysteresis (Note 3) 15 mV Shutdown Input
UTC LM2954
LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R102-002,B
PARAMETER PART NUMBER
TEST CONDITIONS MIN.
TYP.
MAX. UNIT
Input Logic Voltage
Low(Regulator ON) High(Regulator OFF) 2.0
1.3 0.70 V Shutdown Pin Input
Current V shutdown =2.4V
30 50 µA
V shutdown
30V 450 600 µA Regulator Output Current Shutdown
Vshutdown>2V,V IN <=30V, V out =0,
paamFeedback pin tied to 5V Tap.
3 10
µA
Note 1: Additional conditions for 8-pin versions are feedback tied to 5V Tap an Output tied to Output Sense
(V out =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 ≤I L ≤100mA, T J ≤T JMAX
APPLICATION CIRCUIT (10A LOW DROPOUT REGULATOR)
CURRENT
µF
Vout=1.23V*(1+R1/R2)
For 5V output use internal resistors.Wire pin 6 to 7
and wire pin 2 to +V out
Fig.2
