参数资料
型号: TS2576CZ5-3.3
厂商: Taiwan Semiconductor Co., Ltd.
元件分类: 基准电压源/电流源
英文描述: 3A Step Down Switching Voltage Regulator
中文描述: 第3A降压开关稳压器
文件页数: 3/7页
文件大小: 141K
代理商: TS2576CZ5-3.3
TS2576
3-7
2003/12 rev. A
All Output Voltage Version
(Vin=12V for 5V, 3.3V and Adjustable version, Vin=25V for 12V version, I
L
= 500mA)
Oscillator Frequency (Note 2)
47
52
58
kHz
Quiescent Current (Note 3)
--
5
10
mA
Standby Current
ENABLE =5V
--
70
200
uA
Saturation Voltage (Note 4)
I
LOAD
=3A
--
1.4
1.8
V
Feedback Bias Current
V
OUT
=5V (Adj. Version only)
--
50
100
nA
Duty Cycle (Note 5)
Operating (ON)
93
98
--
%
Current Limit (Note 2)(Note 4)
4.2
7.0
8.8
A
V
OUT
=0V
--
0.3
2
Output Leakage Current (Note 3)
V
OUT
=-1V
--
7.5
30
mA
V
IH
(V
OUT
=0V)
2.2
1.4
--
ENABLE Threshold Voltage
V
IL
(V
OUT
=Normal Output Voltage)
--
1.2
1.0
V
I
IH
(ENABLE =5V)
--
12
30
ENABLE Input Current
I
IH
(ENABLE =0V)
--
0
10
uA
Note 1: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator
system performance. Refer to Application information for details.
Note 2: The oscillator frequency reduces to approximately 11KHz in the event of fault conditions, such as output short or
overload. And the regulated output voltage will drop approximately 40% from the nominal output voltage. This
self-protection feature lowers the average power dissipation by lowering the minimum duty cycle from 5% down to
approximately 2%.
Note 3: For these parameters, FB is removed from V
OUT
and connected to +12V to force the output transistor OFF.
Note 4: V
OUT
pin sourcing current. No diode, inductor or capacitor connected to V
OUT.
Note 5: FB is removed from V
OUT
and connected to 0V.
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