P2576 Datasheet, PDF (4/8 Pages) Unisonic Technologies – 3A STEP-DOWN VOLTAGE SWITCHING REGULATOR

P2576
LINEAR INTEGRATED CIRCUIT
„ ABSOLUTE MAXIMUM RATINGS (Ta=25°C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNITS
Supply Voltage
V_CC
40
V
Maximum Supply Voltage
ON / OFF Pin Input Voltage
V_CC(MAX)
V_ON/OFF
45
V
-0.3 ~ V_IN
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, V_IN=12V, I_LOAD=500mA.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
P2576 - 5.0V
Feedback Voltage
Efficiency
P2576 - ADJ
V_OUT
η
V_IN=12V, I_LOAD=0.5A
8V≤V_IN≤40V, 0.5A≤I_LOAD≤3.0A
V_IN = 12 V, I_LOAD =3.0 A
4.900 5.0 5.100 V
4.800 5.0 5.200 V
77
%
Feedback Voltage
Efficiency
ALL OUTPUT VOLTAGE
V_FB
V_IN=12V, I_LOAD=0.5A, V_OUT =5V
1.217 1.23 1.243 V
8V≤V_IN≤40V, 0.5A≤I_LOAD≤3.0A, V_OUT =5V 1.193 1.23 1.267 V
η V_IN = 12 V, I_LOAD =3.0 A, V_OUT =5V
77
%
Oscillator Frequency
Saturation Voltage
Max Duty Cycle (ON)
f_OSC
V_SAT
DC
(Note 4)
I_OUT=3A (Note 1)
(Note 2)
42 52 63 kHz
1.4 1.8 V
93 98
%
Current Limit
Output Leakage Current
I_LIMIT
I_I(LEAK)
(Note 1, 4)
V_IN=40V, Output=-1V (Notes 3)
Output=-1V
4.2 5.8 6.9 A
2 mA
7.5 30 mA
Quiescent Current
IQ (Note 6)
5 10 mA
Standby Quiescent Current
ISTBY ON / OFF Pin=5V (OFF)
50 200 μA
ON/OFF Pin Logic Input Level
V_IH V_OUT=0V
V_IL V_OUT=Nominal Output Voltage
2.2 1.4
V
1.2 1.0 V
ON/OFF Pin Input Current
I_IΗ ON / OFF Pin=5V (OFF)
I_IL ON / OFF Pin=5V (ON)
12 30 μA
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 by lowering the minimum duty cycle
from 5% down to approximately 2%.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 8
QW-R101-025.F