P2576L-XX-TA5-T [UTC]
3A STEP-DOWN VOLTAGE SWITCHING REGULATOR; 3A降压开关稳压器型号: | P2576L-XX-TA5-T |
厂家: | Unisonic Technologies |
描述: | 3A STEP-DOWN VOLTAGE SWITCHING REGULATOR |
文件: | 总8页 (文件大小:288K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
P2576
LINEAR INTEGRATED CIRCUIT
3A STEP-DOWN VOLTAGE
SWITCHING REGULATOR
1
TO-220B
DESCRIPTION
As a step-down (buck) switching regulator, the UTC P2576
provides drives 3A load. The UTC P2576 are simple because it
only needs to use a minimum number of external components.
Frequency compensation and a fixes-frequency oscillator are
in it. UTC P2576 can perform with standard inductors, and
simplifying the switch mode power supplies’ design. UTC P2576
guarantees output load conditions and ±10% on the oscillator
frequency. Its external shutdown is included with 50μA standby
current. As well as thermal shutdown for full protection under fault
conditions, the output switch has cycle by cycle current limiting.
1
TO-220-5
1
TO-263-5
FEATURES
SOP-8
* Output Current 3A
* Input Voltage Range from 7V to 40V
* Requires 4 External Components
* Very High Efficiency
HSOP-8
* TTL Shutdown
* Low Power Standby Mode
* Thermal Shutdown,
* Current Limit Protection
* Internal Oscillator: 52 kHz Fixed Frequency
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
P2576L-xx-TA5-T
P2576L-xx-TB5-T
P2576L-xx-TQ5-R
P2576L-xx-TQ5-T
P2576L-xx-S08-R
P2576L-xx-S08-T
P2576L-xx-SH2-R
P2576L-xx-SH2-T
P2576G-xx-TA5-T
P2576G-xx-TB5-T
P2576G-xx-TQ5-R
P2576G-xx-TQ5-T
P2576G-xx-S08-R
P2576G-xx-S08-T
P2576G-xx-SH2-R
P2576G-xx-SH2-T
TO-220-5
TO-220B
TO-263-5
TO-263-5
SOP-8
Tube
Tube
Tape Reel
Tube
Tape Reel
Tube
SOP-8
HSOP-8
HSOP-8
Tape Reel
Tube
Note: xx: Output Voltage, refer to Marking Information.
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QW-R101-025.G
P2576
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION of SOP-8/HSOP-8
1
GND
GND
VIN
8
7
2
3
4
VOUT
FB
6
5
GND
GND
ON/OFF
PIN DESCRIPTIONS
FOR SOP-8/HSOP-8
PIN NO.
PIN NAME
PIN DESCRIPTION
1
VIN
VOUT
FB
Input voltage
2
Output voltage
Feed back.
3
4
ON/ OFF
GND
ON/OFF select pin, when connected to the ground the chip in operating normally.
Ground
5,6,7,8
FOR TO-220B/TO-220-5/TO-263-5
PIN NO.
PIN NAME
VIN
PIN DESCRIPTION
1
2
3
4
5
Input voltage
Output voltage
Ground
VOUT
GND
FB
Feed back.
select pin, when connected to the ground the chip in operating normally.
ON/ OFF
ON/OFF
MARKING INFORMATION
PACKAGE
VOLTAGE CODE
MARKING
TO-220B
TO-220-5
TO-263-5
50:5.0V
AD:ADJ
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P2576
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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P2576
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VCC
RATINGS
40
UNITS
V
Supply Voltage
Maximum Supply Voltage
VCC(MAX)
VON/OFF
VOUT
45
V
-0.3 ~ VIN
V
ON/ OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
-1.0
Internally Limited
+150
V
PD
mW
°C
°C
°C
Junction Temperature
TJ
Operating Temperature
Storage Temperature
TOPR
-40 ~ +125
-65 ~ +150
TSTG
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS (TJ=25°C, VIN=12V, ILOAD=500mA.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
P2576 - 5.0V
VIN=12V, ILOAD=0.5A
4.900 5.0 5.100
4.800 5.0 5.200
77
V
V
Feedback Voltage
VOUT
8V≤VIN≤40V, 0.5A≤ILOAD≤3.0A
VIN = 12 V, ILOAD =3.0 A
Efficiency
η
%
P2576 - ADJ
VIN=12V, ILOAD=0.5A, VOUT =5V
1.217 1.23 1.243
V
V
Feedback Voltage
VFB
8V≤VIN≤40V, 0.5A≤ILOAD≤3.0A, VOUT =5V 1.193 1.23 1.267
Efficiency
η
VIN = 12 V, ILOAD =3.0 A, VOUT =5V
77
%
ALL OUTPUT VOLTAGE
Oscillator Frequency
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
fOSC
(Note 4)
(Note 2)
42
93
52
1.4
98
63
kHz
V
VSAT IOUT=3A (Note 1)
1.8
DC
%
ILIMIT (Note 1, 4)
4.2 5.8
6.9
2
A
VIN=40V, Output=-1V (Notes 3)
mA
mA
mA
μA
V
Output Leakage Current
II(LEAK)
Output=-1V
(Note 6)
7.5
30
10
200
Quiescent Current
IQ
ISTBY
VIH
VIL
5
50
Standby Quiescent Current
ON/ OFF Pin=5V (OFF)
VOUT=0V
2.2 1.4
1.2
ON/OFF Pin Logic Input Level
ON/OFF Pin Input Current
VOUT=Nominal Output Voltage
1.0
30
10
V
IIΗ
12
μA
ON/ OFF Pin=5V (OFF)
ON/ OFF Pin=5V (ON)
IIL
0
μA
Notes:1.Output pin sourcing current. No diode, inductor or capacitor connected to output.
2.Feedback pin removed from output and connected to 0V.
3.Feedback pin removed from output and connected to +12V, to force the output transistor OFF.
4.The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload
which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This
self- protection feature lowers the Average power dissipation of P2576 by lowering the minimum duty cycle
from 5% down to approximately 2%.
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P2576
LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
Feedback
Output
VIN
100μH
DC Input
P2576
+5V
3A Load
L1
GND
ON/OFF
+
+
CI
100μF
D1
CO
680μF
1N5822
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P2576
LINEAR INTEGRATED CIRCUIT
TYPICAL TEST CIRCUIT
Feedback
VIN
P2576
L1
Output
VOUT
100μH
GND
ON/OFF
LOAD
VIN
+
+
CI
100μF
CO
680μF
Unregulated
DC Input
D1
MBR360
CI : 100μF, 75V
CO : 680μF, 25V
D1 : Schottky, MBR360
L1 : 100μH
R1 : 2K, 0.1%
R2 : 6.12K, 0.1%
Feedback
Output
VIN
VIN
UTC
P2576 - ADJ
L1
100μH
VOUT=5.0 V
GND
ON/OFF
R2
R1
+
7V-40V
Unregulated
DC Input
CIN
100μF
LOAD
D1
MBR360
COUT
680μF
R2
Note: VOUT = VREF(1+
)
R1
VOUT
R2 = R1(
VREF
−1)
(Where VREF=1.23V, R1 between 1k and 5k.)
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P2576
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT (TA=25°C, VCC=12V, unless otherwise specified)
Quiescent Current
Dropout Voltage
24
22
2.0
1.5
VOUT=5V,
Measured at Ground Pin T =25°C
20
18
16
14
12
10
8
ILOAD=3A
1.0
0.5
0
ILOAD=0.2A
0
-75 -50 -25
0
25 50 75 100 125 150
10
20
30
40
50
60
Junction Temperature (°C)
Input Voltage (V)
Load Transient Response
Standby Quiescent Current
75
70
1
0
VIN=40V
60
50
ON/OFF PIN:5V
VIN=12V
-1
3
VIN=12V, VOUT=5V@3A
40
30
0.01
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
-50
0
25
50
75 100 125
-25
Junction Temperature (°C)
Time(ms)
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P2576
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT(Cont.)
Quiescent Current vs. Duty Cycle
Adjustable Version Only
Feedback Voltage vs Duty Cycle
40.0
37.5
35.0
32.5
30.0
27.5
25.0
22.5
20.0
15.0
10.0
5.0
VIN=7V
0
20.0
17.5
15.0
12.5
10.0
7.5
VIN=40V
-5.0
-10.0
-15.0
-20.0
5.0
ILOAD=0.5A
20
2.5
0
0
40
60
80
100
0
20
40
60
80
100
Duty Cycle (%)
Duty Cycle (%)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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