AS432A1DA [ETC]
Positive Adjustable Voltage Regulator ; 正，可调式稳压器\n
| 型号： | AS432A1DA |
| 厂家： | 
ETC |
| 描述： | Positive Adjustable Voltage Regulator
|
| 文件： | 总8页 (文件大小：121K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AS432
1.24V Precision Adjustable Shunt Reference/Amplifier
SEMICONDUCTOR
Features
Description
Temperature-compensated:
The AS432 is a three terminal adjustable shunt regulator utilizing an accurate
1.24V bandgap reference. The AS432 is functionally similar to an AS431 except
for its lower reference voltage, making it usable in a wide variety of low voltage
applications.
¥
50 ppm/¡C
0.25% to 2.0% bandgap offered
Internal amplifier with 150 mA
capability
¥
¥
Because of its robust bipolar technology, the AS432 handles a wide range of cur-
rent, and holds off more than 18V so its use is not limited to low power, low volt-
age systems. Significant care has been taken to provide adequate AC bandwidth
to allow the AS432 as an amplifier in control systems and power electronics.
Multiple temperature ranges
Low frequency dynamic output
impedance: < 150 m½
Low output noise
¥
¥
¥
Pin Configuration Ñ Top view
TO-92 (LP)
SOIC (D)
CATHODE
ANODE
ANODE
N/C
REFERENCE
ANODE
ANODE
N/C
1
2
3
4
8
7
6
5
CATHODE
ANODE
REFERENCE
SOT-23/5L (DBV)
SOT-89 (S)
SOT-23/3L (VS)
N/C
ANODE
CATHODE
CATHODE
N/C
ANODE
ANODE
REFERENCE
REFERENCE
CATHODE
REFERENCE
Ordering Information
AS432 A 2 D 7
Circuit Type:
1.24V Precision Adjustable
Shunt Regulator/Amplifier
Packaging Option:
A = Ammo Pack
B = Bulk
T
7
= Tube
= Tape and Reel (7" Reel Dia)
Temperature Range:
= 0°C to 70°C
= 0°C to 105°C
= –40°C to +85°C
A
B
C
13 = Tape and Reel (13" Reel Dia)
Package Style:
= SOIC
D
= SOT-23/5L
= TO-92
= SOT-89
= SOT-23/3L
Bandgap Tolerance:
DBV
LP
S
= ±2%
2
= ±1%
1
= ±0.5%
= ±0.25%
R5
R25
VS
ASTEC Semiconductor
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AS432
1.24V Precision Adjustable Shunt Reference/Amplifier
Functional Block Diagram
CATHODE (K)
REFERENCE
+
Ð
(R)
+
Ð
1.24 V
ANODE (A)
Absolute Maximum Ratings
Parameter
Symbol
Rating
Units
Cathode-Anode Reverse Breakdown
Anode-Cathode Forward Current
Operating Cathode Current
Reference Input Current
Continuous Power at 25¡C
TO-92
VKA
IAK
18
1
V
A
IKA
100
1
mA
mA
IREF
PD
775
750
mW
mW
mW
mW
¡C
8L SOIC
SOT-89
1000
200
SOT-23/3L/5L
Junction Temperature
Storage Temperature
Lead Temperature (Soldering 10 sec.)
TJ
TSTG
TL
150
Ð65 to 150
300
¡C
¡C
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sec-
tions of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Recommended Conditions
Typical Thermal Resistances
Parameter
Symbol
Rating
Unit
Package
θJA
θJC
Typical Derating
Cathode Voltage
Cathode Current
VKA
IK
VREF to 18
10
V
TO-92
SOIC
160¡C/W
175¡C/W
110¡C/W
80¡C/W
45¡C/W
8¡C/W
6.3 mW/¡C
5.7 mW/¡C
9.1 mW/¡C
1.7 mW/¡C
mA
SOT-89
SOT-23/3L/5L 575¡C/W 150¡C/W
ASTEC Semiconductor
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1.24V Precision Adjustable Shunt Reference/Amplifier
AS432
Electrical Characteristics
Electrical characteristics are guaranteed over the full junction temperature range (0Ð105¡C). Ambient temperature must be derated
based upon power dissipation and package thermal characteristics. Unless otherwise stated, test conditions are: VKA = VREF and
IK = 10 mA.
Test
AS432 (0.25%)
AS432 (0.5%)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Output Voltage
VREF
IK = 10 mA
1.237 1.240 1.243
1.234 1.240 1.246
V
TJ = 25¡C
VK = VREF
Line Regulation
ÆVREF
ÆVREF
ÆVREF
IREF
VKA = 1.25 to 15 V
IK = 1 to 100 mA
0 < TJ < 105¡C
28
3.9
5
50
6
28
3.9
5
50
6
mV
mV
mV
µA
Load Regulation
Temperature Deviation
Reference Input Current
10
6
10
6
2.3
0.14
2.3
0.14
Reference Input Current
Temperature Coefficient
ÆIREF
0 < TJ < 105¡C
0.6
0.6
µA
Minimum Cathode
Current for Regulation
IK(min)
IK(min)
0.2
1
0.2
1
mA
nA
Off State Leakage
VREF = 0 V,
VKA = 15 V
0.04
500
0.04
500
Test
AS432 (1.0%)
AS432 (2.0%)
Parameter
Symbol
Condition
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
Output Voltage
VREF
IK = 10 mA
TJ = 25¡C
VK = VREF
1.228 1.240 1.252
1.215 1.240 1.256
V
Line Regulation
ÆVREF
ÆVREF
ÆVREF
IREF
VKA = 1.25 to 15 V
IK = 1 to 100 mA
0 < TJ < 105¡C
28
3.9
5
50
6
28
3.9
5
50
6
mV
mV
mV
µA
Load Regulation
Temperature Deviation
Reference Input Current
12
6
12
6
2.3
0.14
2.3
0.14
Reference Input Current
Temperature Coefficient
ÆIREF
0 < TJ < 105¡C
0.6
0.6
µA
Minimum Cathode
Current for Regulation
IK(min)
IK(min)
0.2
1
0.2
1
mA
nA
Off State Leakage
VREF = 0 V,
VKA = 15 V
0.04
500
0.04
500
*Temperature deviation is defined as the maximum deviation of the reference over the given temperature range and does not imply
an incremental deviation at any given temperature.
ASTEC Semiconductor
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AS432
1.24V Precision Adjustable Shunt Reference/Amplifier
Typical Performance Curves
*Calculating Average Temperature Coefficient (TC)
∆VREF (mV)
∆TA
0
0
0
• TC in mV/°C =
∆V
REF
∆T
∆V
REF
X 100
V
REF at 25°C
2000
0.2
–5
• TC in %/°C =
∆TA
∆V
REF
X 106
–10
V
REF at 25°C
0
15 30
45 60 75 90 105
• TC in ppm/°C =
∆TA
Temperature (°C)
0.021 mV/°C
0.008%/°C
8.0 ppm/°C
Test Circuits
V
V
V
IN
V
KA = V
V
V
KA
IN
IN
REF
KA
IK
IREF
IK
IK (OFF)
R1
)
IREF
(V
REF
R2
Figure 1a. Test Circuit 1
Figure 1b. Test Circuit 2
Figure 1c. Test Circuit 3
ASTEC Semiconductor
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1.24V Precision Adjustable Shunt Reference/Amplifier
AS432
Typical Performance
Low Current Operating Characteristics
High Current Operating Characteristics
900
800
700
600
500
400
300
200
100
0
175
150
125
100
75
V
KA = V
REF
Temperature Range –55 to 125°C
50
25
0
125°C
–25
–50
–55°C
25°C
–100
–200
–75
–100
–0.5
0
0.5
1.0
1.5
–2
–1
0
1
2
VKA – Cathode Voltage (V)
VKA – Cathode Voltage (V)
Figure 2
Figure 3
Off State Leakage
Reference Voltage vs Ambient Temperature
100
10
1.27
V
KA = 15 V
VKA = V
REF
IK = 10 mA
VREF = 0 V
1.26
1.25
1.24
1.23
VREF = 1.240 V at 25°C
1
0.1
1.22
1.21
1.20
1.19
0.01
–60
–30
0
30
60
90
120
–60
–30
0
30
60
90
120
TA – Ambient Temperature (°C)
TA – Ambient Temperature (°C)
Figure 4
Figure 5
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AS432
1.24V Precision Adjustable Shunt Reference/Amplifier
Typical Performance Curves
Reference Input Current
Reference Voltage Line Regulation
0
–10
–20
–30
2.4
R1 = 10 kΩ
R2 = ∞
IK = 10 mA
2.3
2.2
2.1
2.0
–40°C
25°C
75°C
–40
–50
125°C
IK = 10 mA
Temperature Range: –55 to 125°C
0
3
6
9
12
15
18
–60
–30
0
30
60
90
120
VKA – Cathode Voltage (V)
TA – Ambient Temperature (°C)
Figure 6
Figure 7
Noise Voltage
Low Frequency Dynamic Output Impedance
70
40
V
KA = V
REF
V
KA = V
REF
VKA = 1 to 100 mA
60
50
IK = 10 mA
TA = 25°C
f ≤ 1kHz
30
20
10
0
40
30
20
10
0
10
100
1 k
10 k
100 k
–60
–30
0
30
60
90
120
f – Frequency (Hz)
TA – Free Air Temperature (°C)
Figure 8
Figure 9
ASTEC Semiconductor
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1.24V Precision Adjustable Shunt Reference/Amplifier
AS432
Typical Performance Curves
Dynamic Output Impedance
100
TA = 25°C
IK = 1 to 100 mA
10
1.0
0.1
0.01
1 k
10 k
100 k
1 M
10 M
f – Frequency (Hz)
Figure 10
Small Signal Voltage Gain vs. Frequency
Temperature Range: –55° to 125°C
IK = 10 mA
80
70
60
OUT
IK
230 Ω
15 k
9 µF
50
40
30
8.25 k
GND
20
10
0
1 k
10 k
100 k
1 M
10 M
f – Frequency (Hz)
Figure 11
ASTEC Semiconductor
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AS432
1.24V Precision Adjustable Shunt Reference/Amplifier
Typical Performance Curves
Pulse Response
4
INPUT
MONITOR
220 Ω
3
OUT
Input
2
Output
50 Ω
fP = 100 kHz
1
0
GND
–1
0
1
2
3
4
5
6
7
8
9 10 11 12
t – Time (µs)
Figure 12
Stability Boundary Conditions
100
A: VKA = V
REF
90
80
70
60
B: VKA = 5 V at IK = 10 mA
C: VKA = 10 V at IK = 10 mA
D: VKA = 15 V at IK = 10 mA
150 Ω
IK
C
50
40
CL
A
Stability
Region
30
20
10 K
B
TA = 25°C
10
0
100
D
101
102
103
104
105
106
107
CL – Load Capacitance (pF)
Figure 13
ASTEC Semiconductor
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