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SPX2950 데이터시트 PDF




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부품번호 SPX2950 기능
기능 150mA Low Dropout Voltage Regulator
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SPX2950 데이터시트, 핀배열, 회로
® SPX2950/SPX2951
150mA Low Dropout Voltage Regulator
FEATURES
5.0V and 3.3V at 150mA Output
Accurate: 0.5% for SPX2950A/SPX2951A
Very Low Quiescent Current
Low Dropout Voltage: 300mV at 150mA
Extremely Tight Load and Line Regulation
Very Low Temperature Coefficient
Current & Thermal Limiting
Need Only 1µF for Stability
Offered in TO-92 (SPX2950) and SOIC
(SPX2951)
Direct Replacement for LP2950/LP2951
SPX2951 versions only
Error Flag Warns of Output Dropout
Logic-Controlled Electronic Shutdown
Output Programmable From 1.24 to 29V
8-Pin Surface Mount (S)
OUTPUT
SENSE
SHUTDOWN
GROUND
1
2
3
4
8 INPUT
7 FEEDBACK
6 5V or 3.3V Output
5 ERROR
VOUT
TO-92 (N)
1 23
GROUND
VIN
SPX2951 Top View
SPX2950 Bottom View
Now Available in Lead Free Packaging
APPLICATIONS
Battery Powered Systems
Cordless Telephones
Radio Control Systems
Portable/Palm Top/Notebook Computers
Portable Consumer Equipment
Portable Instrumentation
Avionics
SMPS Post-Regulator
Voltage Reference
Automotive Electronics
DESCRIPTION
The SPX2950 and SPX2951 are low power voltage regulators. These devices are an excellent choice for
use in battery-powered applications such as cordless telephones, radio control systems, and portable
computers. The SPX2950 and SPX2951 feature low quiescent current and low dropout voltage (typ. 20mV
at 100µA and 300mV at 150mA). This includes a tight initial tolerance of (0.5% for SPX2950A/SPX2951A),
extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20ppm/
°C typ.), making the SPX2950/SPX2951 useful as a low-power voltage reference.
The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling
voltage. The logic compatible shutdown feature enables the regulator to be switched ON and OFF. The
SPX2950 is offered in a 3-pin TO-92 package compatible with other 5.0V, 3.3V regulators. The SPX2951
is availiable in an 8-lead SOIC package.
UNREGULATED DC
+
7
FEEDBACK
8
INPUT
1
OUTPUT
FROM
CMOS OR
TTL
3
SHUTDOWN
+
_
ERROR
AMPLIFIER
180k
60 mV
+
+
60k
_ ERROR DETECTION
+ 1.23V
COMPARATOR
REFERENCE
2
SENSE
6
5V TAP
5
______
ERROR
4
GROUND
5V
330k
+
1µF
.
.
TO CMOS OR
TTL
Block Diagram of SPX2951, 8 Lead 5V Version
DATE: 12/01/04
SPX2950/SPX2951 150mA Low Dropout Voltage Regulator
1
©Copyright 2004 Sipex Corporation




SPX2950 pdf, 반도체, 판매, 대치품
TYPICAL PREFORMANCE CHARACTERISTICS
6
5
4
R L =50k
3
R L =50k
2
1
0
0 123 45
INPUT VOLTAGE (VOLTS)
Dropout Characteristics
6
250
225
200
RL = 50k
175
150
125
100 RL =
75
50
25
0
0
1 2 3 4 5 67 8
INPUT VOLTAGE (VOLTS)
9 10
Input Current
10
1
0.1
0.01
0.1 1 10
LOAD CURRENT (mA)
Quiescent Current
100
320
280
240
200 IL= 1mA
160
IL= 0
120
80
40
0
0 1 2 34 56 7 8
INPUT VOLTAGE (VOLTS)
Ground Current
160
150
140
130 RL=50
120 VOUT = 5V
110
100
90
80
70
60
50
40
30
20
10
0
0 1 2 3 4 5 6 7 8 9 10
INPUT VOLTAGE (VOLTS)
Input Current
6
5
V IN = 6V
IL = 100mA
4
3
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
Ground Current
8
7
6
IL=100mA
5
4
3
2
1
0
0 12345678
INPUT VOLTAGE
Ground Current
190
170
V IN=6V
IL =100uA
150
130
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
Quiescent Current
DATE: 12/01/04
SPX2950/SPX2951 150mA Low Dropout Voltage Regulator
4
©Copyright 2004 Sipex Corporation

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SPX2950 전자부품, 판매, 대치품
TYPICAL PREFORMANCE CHARACTERISTICS
1.8
1.6
1.4
1.2
1.0
0.8
0.6
-75 -50 -25 0 25 50 75 100 125 150
TEMPERATURE (ºC)
Shutdown Threshold Voltage
5
4
2
0
-2
~~
1
1.25W
0
-1
0 10 20 30
TIME (µs)
Thermal Response
40
3.5
3.0
2.5
CL = 220µF
2.0
CL = 3.3µF
1.5 CBYP = 0.1µF
IL = 100mA
CL = 1µF
1.0
0.5
0.0
50
10 2 10 3
10 4
FREQUENCY (Hz), C BYP=0.1uF
Output Noise
10 5
30
25
20
15
10 T J= 150 ºC
5
IL = 100µA
IL = 1mA
0
~~
10
5 T J= 125 ºC
0
-5
IL = 100µA
-10
5 10 15 20 25
INPUT VOLTAGE (V)
30
Line Regulation
80
IL = 50mA
70
60
IL = 100mA
50
40
C L = 1µF
30 VIN = 6V
VOUT = 5V
20
10
10 1
10 2 10 3 10 4
FREQUENCY (Hz)
Ripple Rejection
10 5
10 6
DATE: 12/01/04
SPX2950/SPX2951 150mA Low Dropout Voltage Regulator
7
©Copyright 2004 Sipex Corporation

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