KA350TU [FAIRCHILD]
Adjustable Positive Standard Regulator, 1.2V Min, 33V Max, BIPolar, PSFM3, TO-220, 3 PIN;型号: | KA350TU |
厂家: | FAIRCHILD SEMICONDUCTOR |
描述: | Adjustable Positive Standard Regulator, 1.2V Min, 33V Max, BIPolar, PSFM3, TO-220, 3 PIN 局域网 输出元件 调节器 |
文件: | 总8页 (文件大小:119K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
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KA350
3-Terminal 3A Positive Adjustable Voltage
Regulator
Features
Description
• Output adjustable between 1.2V and 33V
• Guaranteed 3A output current
• Internal thermal over load protection
• Load regulation (Typ: 0.1%)
The KA350 is an adjustable 3-terminal positive voltage
regulator capable of supplying in excess of 3.0 A over an
output voltage range of 1.2V to 33 V
TO-220
• Line regulation (Typ: 0.015%/V)
• Internal short circuit current limit
• Output transistor safe area compensation
1
1. Adj 2. Output 3. Input
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
KA350
Absolute Maximum Ratings
Parameter
Symbol
V - V
Value
35
Unit
Input Output Voltage Differential
Lead Temperature (Soldering, 10sec)
Power Dissipation
V
DC
I
O
T
300
°C
-
LEAD
P
Internally limited
0 ~ +125
-65 ~ +150
D
Operating Temperature Range
Storage Temperature Range
T
OPR
°C
°C
T
STG
Electrical Characteristics
(V -V =5V, I =1.5A, T =0°C to + 125°C; P ≤ P
, unless otherwise specified)
I
O
O
J
D
DMAX
Parameter
Symbol
Min. Typ. Max.
Unit
Conditions
Line Regulation (Note1)
Load Regulation (Note1)
Adjustment Pin Current
Rline
T = +25°C, 3V ≤ V -V ≤ 35V
-
0.015 0.03
%/V
A
I
O
T = +25 °C, 3V ≤ V -V ≤ 35V
A
I
O
Rload
V
V
≤ 5V
≥ 5V
-
5
25
mV
%
O
O
0.1
0.5
I
-
-
-
-
50
100
5.0
µA
µA
ADJ
Adjustment Pin Current
Change
3V ≤ V -V ≤ 35V,
0.2
I
O
∆I
ADJ
10mA ≤ I ≤ 3A, P ≤ P
o
D
MAX
Thermal Regulation
Reference Voltage
Line Regulation
REG
Pulse = 20ms, T =+ 25°C
0.002
-
%/W
V
T
A
V
REF
3V ≤ V -V ≤ 35V, 10mA ≤ I ≤ 3A,P ≤ 30W 1.2 1.25 1.30
I O O D
Rline
3.0V ≤ V -V ≤ 35V
-
0.02 0.07
%/W
I
O
10mA ≤ I ≤ 3.0A
O
Load Regulation
V
V
≤ 5.0V
≥ 5.0V
-
20
0.3
70
1.5
mV
%
O
O
Rload
Temperature Stability
ST
T = 0°C to + 125°C
-
1.0
4.5
-
-
%
A
T
J
Maximum Output
Current
V -V ≤ 10V, P ≤ P
3.0
I
O
D
MAX
V -V = 30V, P ≤ P ,T = +25°C
MAX A
I
o(MAX)
0.25 1.0
-
A
I
O
D
Minimum Load Current
I
V -V = 35V
-
-
3.5
10
-
mA
L(MIN)
I
O
RMS Noise, %of V
V
10Hz ≤ f ≤ 10KHz, T = +25 °C
0.003
%/V
o
OUT
N
A
V
= 10V, f = 120Hz,
O
Ripple Rejection
C
C
= 0
= 10µF
65
80
-
dB
dB
ADJ
ADJ
RR
ST
66
-
Long-Term Stability
T =+125 °C
J
0.3
1
%/
1000HR
Note:
1. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects must be taken
into account separately. Pulse testing with low duty cycle is used.
2
KA350
Typical Perfomance Characteristics
Figure 1. Load Regulation
Figure 2. Current Limit
Figure 3. Adjustment Pin Current
Figure 4. Dropout Voltage
Figure 5. Temperature Stability
Figure 6. Minimum Load Current
3
KA350
Typical Perfomance Characteristics (continued)
Figure 7. Ripple Rejection vs Vo
Figure 8. Ripple Rejection vs Io
Figure 9. Ripple Rejection vs Frequency
Figure 10. Output Impedance
Figure 11. Line Transient Response
Figure 12. Load Transient Response
4
KA350
Typical Application
Input
Output
Figure 13.
C : C is required if the regulator is located an appreciable distance from power supply filter.
I
I
C
: Output capacitors in the range of 1µF to 100µF of aluminum or tantalum capacitor are commonly used to provide
O
improved output impedance and rejection of transients.
In operation, the KA350 develops a nominal 1.25V reference voltage, V , between the output and adjustment terminal. The
REF
reference voltage is impressed across program resistor R and, since the voltage is constant, a constant current I then flows
1
1
through the output set resistor R , giving an output voltage of
2
V
O
= 1.25V(1+R /R ) + I
R
ADJ 2
2
1
Since I
current (less than 100µF) from the adjustment terminal represents an error term, the KA350 was designed to mini-
ADJ
mize I
and make it very constant with line and load changes. To do this, all quiescent operating current is returned to the
ADJ
output establishing a minimum load current requirement. If there is insufficient load on the output, the output voltage will rise.
Since the KA350 is a floating regulator, it is only the voltage differential across the circuit which is important to performance,
and operation at high voltage with respect to ground is possible.
Since I
ADJ
is controlled to less than 100µA, the error associated with this term is negligible in most applications.
5
KA350
Mechanical Dimensions (Continued)
Package
TO-220
4.50 ±0.20
9.90 ±0.20
(8.70)
+0.10
–0.05
1.30
ø3.60 ±0.10
1.27 ±0.10
1.52 ±0.10
0.80 ±0.10
+0.10
–0.05
0.50
2.40 ±0.20
2.54TYP
2.54TYP
[2.54 ±0.20]
[2.54 ±0.20]
10.00 ±0.20
6
KA350
Ordering Information
Product Number
Package
TO-220
Operating Temperature
KA350
0°C to + 125°C
7
KA350
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY
LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER
DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and (c) whose failure to
perform when properly used in accordance with
instructions for use provided in the labeling, can be
reasonably expected to result in a significant injury of the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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2001 Fairchild Semiconductor Corporation
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