UNISONIC TECHNOLOGIES CO., LTD
P2576/HV
LINEAR INTEGRATED CIRCUIT
3A STEP-DOWN VOLTAGE
SWITCHING REGULATOR
1
DESCRIPTION
TO-220B
As a step-down (buck) switching regulator, the UTC
P2576/HV provides drives 3A load. The UTC P2576/HV 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/HV can perform with standard inductors, and
simplifying the switch mode power supplies’ design. UTC
P2576/HV 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
SOP-8
FEATURES
* Output Current 3A
* Input Voltage Range of 7V to 40V for P2576 and 7V to 60V for
P2576HV
* Requires 4 External Components
* Very High Efficiency
* TTL Shutdown
* Low Power Standby Mode
* Thermal Shutdown,
* Current Limit Protection
* Internal Oscillator: 52 kHz Fixed Frequency
HSOP-8
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
P2576L-xx-TA5-T
P2576G-xx-TA5-T
P2576L-xx-TB5-T
P2576G-xx-TB5-T
P2576L-xx-TQ5-R
P2576G-xx-TQ5-R
P2576L-xx-TQ5-T
P2576G-xx-TQ5-T
P2576L-xx-S08-R
P2576G-xx-S08-R
P2576L-xx-SH2-R
P2576G-xx-SH2-R
P2576HVL-xx-TQ5-R
P2576HVG-xx-TQ5-R
P2576HVL-xx-TQ5-T
P2576HVG-xx-TQ5-T
Note: xx: Output Voltage, refer to Marking Information.
P2576XXG-xx-TQ5-T
Package
Packing
TO-220-5
TO-220B
TO-263-5
TO-263-5
SOP-8
HSOP-8
TO-263-5
TO-263-5
Tube
Tube
Tape Reel
Tube
Tape Reel
Tape Reel
Tape Reel
Tube
(1) T: Tube, R: Tape Reel
(1)Packing Type
(2) TA5: TO-220-5, TB5: TO-220B, TQ5: TO-263-5
(2)Package Type
S08: SOP-8, SH2: HSOP-8
(3)Output Voltage Code (3) xx: refer to Marking Information
(4)Green Package
(4) G: Halogen Free and Lead Free, L: Lead Free
(5)Supply Voltage Code (5) Blank: 40V, HV: 60V
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Copyright © 2020 Unisonic Technologies Co., Ltd
1 of 9
QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
MARKING INFORMATION
PACKAGE
F2576
VOLTAGE CODE
TO-220B
TO-220-5
TO-263-5
MARKING
Lot Code
Voltage Code
50:5.0V
33:3.3V
12:12V
15:15V
AD:ADJ
UTC
P2576□
XX
XX□□□□□□
L : Lead Free
G: Halogen Free
Date Code
1
2
3
4
5
8 7 6 5
UTC
SOP-8
HSOP-8
Date Code
P2576
L : Lead Free
G: Halogen Free
Lot Code
Voltage Code
1 2 3 4
F2576HV
TO-263-5
50:5.0V
33:3.3V
12:12V
15:15V
AD:ADJ
Lot Code
Voltage Code
UTC
P2576HV□
XX
XX□□□□□□
Date Code
1
UNISONIC TECHNOLOGIES CO., LTD
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L : Lead Free
G: Halogen Free
2
3
4
5
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QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
VIN
VOUT GND
FB ON/OFF
TO-220B/TO-220-5/TO-263-5
VIN
1
8
GND
VIN
1
8
GND
VOUT
2
7
GND
VOUT
2
7
GND
FB
3
6
GND
FB
3
6
GND
ON/OFF
4
5
GND
ON/OFF
4
5
GND
GND
SOP-8
HSOP-8
PIN DESCRIPTIONS
For SOP-8/HSOP-8
PIN NO.
PIN NAME
1
VIN
2
VOUT
3
FB
4
ON / OFF
5,6,7,8
GND
PIN DESCRIPTION
Input voltage
Output voltage
Feed back.
ON / OFF select pin, when connected to the ground the chip in operating normally.
Ground
For TO-220B/TO-220-5/TO-263-5
PIN NO.
PIN NAME
1
VIN
Input voltage
2
VOUT
Output voltage
3
GND
Ground
4
FB
Feed back.
5
ON / OFF
PIN DESCRIPTION
ON / OFF select pin, when connected to the ground the chip in operating normally.
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3 of 9
QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
ON / OFF
VIN
Current
Source
bias
1.235V
Reference
Start
up
2.5V
Regulator
+
-
Comp
-
Comp
+
FB
+Amp
-
Frequency
Compe-nsation
+
Comp
Pre-driver
3A
Switch
Output
50kHz
OSC.
UNISONIC TECHNOLOGIES CO., LTD
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Thermal
Shutdown
GND
4 of 9
QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
Supply Voltage
Maximum Supply Voltage
SYMBOL
P2576
P2576HV
P2576
P2576HV
VCC
VCC(MAX)
VON/OFF
ON / OFF Pin Input Voltage
RATINGS
40
60
45
65
UNITS
V
V
V
V
-0.3 ~ VIN
V
Output Voltage to Ground (Steady State)
VOUT
-1.0
V
Power Dissipation
PD
Internally Limited
mW
Junction Temperature
TJ
+150
°C
Operating Temperature
TOPR
-40 ~ +125
°C
Storage Temperature
TSTG
-65 ~ +150
°C
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, When VOUT = 3.3V & 5V & ADJ, VIN = 12V；VOUT = 12V, VIN = 15V，VOUT = 15V, VIN = 18V, ILOAD=500mA,
unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
3.3V
7V≤VIN≤40V, 0.5A≤ILOAD≤3A
3.17 3.3 3.43
V
5.0V
8V≤VIN≤40V, 0.5A≤ILOAD≤3A
4.8
5.0
5.2
V
Feedback Voltage
VOUT
12V
15V≤VIN≤40V, 0.5A≤ILOAD≤3A
11.52 12.0 12.48 V
15V
18V≤VIN≤40V, 0.5A≤ILOAD≤3A
14.4 15 15.6
V
3.3V
VIN=9V, ILOAD=3A
70
%
5.0V
VIN=12V, ILOAD=3A
77
%
Efficiency
η
12V
VIN=15V, ILOAD=3A
88
%
15V
VIN=18V, ILOAD=3A
88
%
P2576/HV - ADJ
VIN=12V, ILOAD=0.5A, VOUT =5V
1.180 1.23 1.279 V
Feedback Voltage
VFB
8V≤VIN≤40V, 0.5A≤ILOAD≤3.0A, VOUT =5V
1.180 1.23 1.279 V
Efficiency
η
VIN = 12 V, ILOAD =3.0 A, VOUT =5V
77
%
ALL OUTPUT VOLTAGE
Oscillator Frequency
fOSC
(Note 4)
42
52
63
kHz
Saturation Voltage
VSAT IOUT=3A (Note 1)
1.4
1.8
V
Max Duty Cycle (ON)
DC
(Note 2)
93
98
%
Current Limit
ILIMIT (Note 1, 4)
4.2
5.8
6.9
A
VIN=40V, Output=-1V (Notes 3)
2
mA
Output Leakage Current
II(LEAK)
Output=-1V
7.5
30
mA
Quiescent Current
IQ
(Note 3)
5
10
mA
Standby Quiescent Current
ON/OFF Pin Logic Input Level
ON/OFF Pin Input Current
ISTBY
50
ON / OFF Pin=5V (OFF)
200
μA
1.0
V
V
VIH
VIL
VOUT=0V
VOUT=Nominal Output Voltage
2.2
IIΗ
ON / OFF Pin=5V (OFF)
12
30
μA
IIL
ON / OFF Pin=5V (ON)
0
10
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/HV by lowering the minimum
duty cycle from 5% down to approximately 2%.
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5 of 9
QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
Feedback
VIN
DC Input
P2576/HV
100μH
Output
+5V
3A Load
L1
GND
+
ON/OFF
+
CI
100μF
UNISONIC TECHNOLOGIES CO., LTD
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D1
1N5822
CO
1000μF
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QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
TYPICAL TEST CIRCUIT
Fixed Output Voltage Versions
Feedback
VIN
P2576/HV
L1
Output
VOUT
100μH
GND
ON/OFF
LOAD
VIN
+
Unregulated
DC Input
CI
100μF
+
D1
MBR360
CO
1000μF
CI : 100μF, 75V
CO : 680μF, 25V
D1 : Schottky, MBR360
L1 : 100μH
R1 : 2K, 0.1%
R2 : 6.12K, 0.1%
Adjustable Output Voltage Versions
Feedback
VIN
VIN
UTC
P2576/HV - ADJ
Output
L1
VOUT=5.0 V
100μH
GND
ON/OFF
R2
+
7V-40V
Unregulated
DC Input
CIN
100μF
LOAD
D1
MBR360
COUT
1000μF
R1
Note:
VOUT VREF (1
R 2 R1 (
R2
)
R1
VOUT
1)
VREF
(Where VREF=1.23V, R1 between 1k and 5k.)
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7 of 9
QW-R101-025.M
P2576/HV
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT (TA=25°C, VCC=12V, unless otherwise specified)
Switch Saturation Voltage
P2576
1.4
P2576
1.2
Output Current (A)
Saturation Voltage (V)
Current Limit
5.0
1.6
1.0
25°C
0.8
0.6
0.4
4.5
4.0
3.5
0.2
0
0
1.0
1.5
2.0
Switch Current (A)
2.5
3.0
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
Dropout Voltage
P2576
VOUT=5V,
Measured at Ground Pin T =25°C
22
1.5
1.0
0.5
20
18
ILOAD=3A
16
14
12
ILOAD=0.2A
10
75
P2576
8
0
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
0
10
P2576
1
60
50
ON/OFF PIN:5V
VIN=12V
40
30
-50
-25
0
25
50
75 100 125
Junction Temperature (°C)
UNISONIC TECHNOLOGIES CO., LTD
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Output Voltage
Deviation(V)
70
VIN=40V
20
30
40
Input Voltage (V)
50
60
Load Transient Response
Standby Quiescent Current
P2576
0
-1
Load
Current(A)
Standby Quiescent Current (µA)
Quiescent Current
24
Quiescent Current (mA)
Input-Output Differential (V)
2.0
0.5
VIN=12V, VOUT=5V@3A
3
0.01
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
Time(ms)
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QW-R101-025.M
P2576/HV
TYPICAL APPLICATION CIRCUIT(Cont.)
Quiescent Current vs. Duty Cycle
40.0
37.5
35.0
32.5
30.0
27.5
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0
P2576
VIN=7V
VIN=40V
ILOAD=0.5A
20
0
100
Feedback Voltage vs Duty Cycle
20.0
Adjustable Version Only
Feedback Voltage Change (mV)
Quiescent Current (mA)
P2576
15.0
10.0
5.0
0
-5.0
-10.0
-15.0
-20.0
60
40
Duty Cycle (％)
80
100
20
0
Feedback Pin Current
Output
Voltage(V)
50
25
80
100
Switching Waveform
P2576
75
60
40
Duty Cycle (％)
P2576
10
0
VIN=12V, VOUT=5V@3A
0
Inductor
Current(A)
Feedback Pin Current (nA)
LINEAR INTEGRATED CIRCUIT
-25
-50
-75
-100
-75 -50 -25 0 25 50 75 100 125 150
Junction Temperature (°C)
3.0
1.5
0
2.92
2.96
3.00
3.04
Time(ms)
3.08
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. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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QW-R101-025.M
