UNISONIC TECHNOLOGIES CO., LTD
P2576/HV
3A STEP-DOWN VOLTAGE
SWITCHING REGULATOR
1
LINEAR INTEGRATED CIRCUIT
DESCRIPTION
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.
TO-220B
1
TO-220-5
1
TO-263-5
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
SOP-8
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
(1)Packing Type
(2)Package Type
Package
TO-220-5
TO-220B
TO-263-5
TO-263-5
SOP-8
HSOP-8
TO-263-5
TO-263-5
Packing
Tube
Tube
Tape Reel
Tube
Tape Reel
Tape Reel
Tape Reel
Tube
(1) T: Tube, R: Tape Reel
(2) TA5: TO-220-5, TB5: TO-220B, TQ5: TO-263-5
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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QW-R101-025.M
P2576/HV
MARKING INFORMATION
PACKAGE
P2576
VOLTAGE CODE
LINEAR INTEGRATED CIRCUIT
MARKING
TO-220B
TO-220-5
TO-263-5
50:5.0V
33:3.3V
12:12V
15:15V
AD:ADJ
SOP-8
HSOP-8
P2576HV
50:5.0V
33:3.3V
12:12V
15:15V
AD:ADJ
TO-263-5
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QW-R101-025.M
P2576/HV
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTIONS
For SOP-8/HSOP-8
PIN NO.
PIN NAME
1
V
IN
2
V
OUT
3
FB
4
5,6,7,8
ON / OFF
PIN DESCRIPTION
Input voltage
Output voltage
Feed back.
ON / OFF
select pin, when connected to the ground the chip in operating normally.
GND
Ground
PIN DESCRIPTION
For TO-220B/TO-220-5/TO-263-5
PIN NO.
PIN NAME
1
V
IN
Input voltage
2
V
OUT
Output voltage
3
GND
Ground
4
FB
Feed back.
5
ON / OFF
ON / OFF
select pin, when connected to the ground the chip in operating normally.
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QW-R101-025.M
P2576/HV
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
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QW-R101-025.M
P2576/HV
PARAMETER
Supply Voltage
Maximum Supply Voltage
ON / OFF
Pin Input Voltage
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C, unless otherwise specified)
SYMBOL
P2576
P2576HV
P2576
P2576HV
V
CC
V
CC(MAX)
V
ON/OFF
RATINGS
40
60
45
65
-0.3 ~ V
IN
UNITS
V
V
V
V
V
Output Voltage to Ground (Steady State)
V
OUT
-1.0
V
Power Dissipation
P
D
Internally Limited
mW
Junction Temperature
T
J
+150
°C
Operating Temperature
T
OPR
-40 ~ +125
°C
Storage Temperature
T
STG
-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
(T
J
=25°C, When V
OUT
= 3.3V & 5V & ADJ, V
IN
= 12V；V
OUT
= 12V, V
IN
= 15V，V
OUT
= 15V, V
IN
= 18V, I
LOAD
=500mA,
unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
3.3V
7V≤V
IN
≤40V,
0.5A≤I
LOAD
≤3A
3.17 3.3 3.43
V
5.0V
8V≤V
IN
≤40V,
0.5A≤I
LOAD
≤3A
4.8
5.0
5.2
V
Feedback Voltage
V
OUT
12V
15V≤V
IN
≤40V,
0.5A≤I
LOAD
≤3A
11.52 12.0 12.48 V
14.4 15 15.6
V
15V
18V≤V
IN
≤40V,
0.5A≤I
LOAD
≤3A
3.3V
V
IN
=9V, I
LOAD
=3A
70
%
5.0V
V
IN
=12V, I
LOAD
=3A
77
%
Efficiency
η
12V
V
IN
=15V, I
LOAD
=3A
88
%
88
%
15V
V
IN
=18V, I
LOAD
=3A
P2576/HV - ADJ
V
IN
=12V, I
LOAD
=0.5A, V
OUT
=5V
1.180 1.23 1.279 V
Feedback Voltage
V
FB
8V≤V
IN
≤40V,
0.5A≤I
LOAD
≤3.0A,
V
OUT
=5V
1.180 1.23 1.279 V
Efficiency
η
V
IN
= 12 V, I
LOAD
=3.0 A, V
OUT
=5V
77
%
ALL OUTPUT VOLTAGE
Oscillator Frequency
f
OSC
(Note 4)
42
52
63
kHz
Saturation Voltage
V
SAT
I
OUT
=3A (Note 1)
1.4
1.8
V
Max Duty Cycle (ON)
DC
(Note 2)
93
98
%
Current Limit
I
LIMIT
(Note 1, 4)
4.2 5.8
6.9
A
V
IN
=40V, Output=-1V (Notes 3)
2
mA
Output Leakage Current
I
I(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
I
STBY
V
IH
V
IL
I
IΗ
I
IL
ON / OFF
Pin=5V (OFF)
50
2.2
200
1.0
μA
V
V
μA
μA
V
OUT
=0V
V
OUT
=Nominal Output Voltage
ON / OFF
Pin=5V (OFF)
ON / OFF
Pin=5V (ON)
12
0
30
10
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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QW-R101-025.M
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