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參數(shù)資料
| 型號(hào)： | TC2574-VOETR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | WIDE, SOIC-16 |
| 文件頁數(shù)： | 19/25頁 |
| 文件大?。?/td> | 212K |
| 代理商： | TC2574-VOETR |
3
TC2574
0.5A Step-Down Switching Regulator
TC2574-1 1/6/00
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable
version,VIN = 25V for the 12V version. ILOAD = 100mA. For typical values TJ = 25°C, for min/max values TJ is the operat-
ing junction temperature range that applies (Note 2), unless otherwise noted.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
TC2574-ADJUSTABLE VERSION [(Note 1) Test Circuit Figure 2]
Ib
Feedback Bias Current
VOUT = 5.0V (Adjustable Version Only)
nA
TJ = 25°C
—
25
100
TJ = –40°C to +125°C
—
200
fO
Oscillator Frequency (Note 3)
TJ = 25°C
—
52
—
kHz
TJ = 0 to +125°C47
52
58
TJ = –40 to +125°C42
–
63
VSAT
Saturation Voltage
IOUT = 0.5 A, (Note 4)
V
TJ = 25°C
—
1.0
1.2
TJ = –40 to +125°C
—
1.4
DC
Max Duty Cycle (“on”) [Note 5]
93
98
—
%
ICL
Current Limit Peak Current (Notes 3 and 4)
A
TJ = 25°C
0.7
1.0
1.6
TJ = –40 to +125°C
0.65
—
1.8
IL
Output Leakage Current (Notes 6 and 7), TJ = 25°CmA
Output = 0 V
—
0.6
2.0
Output = – 1.0 V
—
10
30
IQ
Quiescent Current (Note 6)
mA
TJ = 25°C
—
5.0
9.0
TJ = –40 to +125°C—
—
11
ISTBY
Standby Quiescent Current
ON/OFF Pin = 5.0 V (“off”)
A
TJ = 25°C
—
60
200
TJ = –40 to +125°C
—
400
ON/OFF Pin Logic Input Level
V
VIH
VOUT = 0V
TJ = 25°C
2.2
1.4
—
TJ = –40 to +125°C
2.4
—
VIL
Nominal Output Voltage
TJ = 25°C
—
1.2
1.0
TJ = –40 to +125°C
—
0.8
ON/OFF Pin Input Current mA
A
IIH
ON/OFF Pin = 5.0V (“off”), TJ = 25°C
—
15
30
IIL
ON/OFF Pin Input Current mA
A
ON/OFF Pin = 0 (“on”), TJ = 25°C
—
0
5.0
NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system
performance. When the TC2574 is used as shown in the Figure 2 test circuit, the system performance will be as
shown in the system parameters section of the Electrical Characteristics.
2. Tested junction temperature range for the TC2574: TLOW = –40°C T high = +125°C
3. The oscillator frequency reduces to approximately 18kHz 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 the IC by lowering the minimum duty cycle from 5% down to approximately 2%.
4. Output (Pin 2) sourcing current. No diode, inductor or capacitor connected to the output pin.
5. Feedback (Pin 4) removed from output and connected to 0 V.
6. Feedback (Pin 4) removed from output and connected to 12V for the Adjustable, 3.3V, and 5.0V versions, and 25V for the 12V
version, to force the output transistor OFF.
7. VIN = 40 V.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC2574VPA | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TC2574-VPA | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:0.5A Step-Down Switching Regulator |
| TC2575 | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
| TC2575-12.0VAT | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
| TC2575-3.3VAT | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:1.0A Step-Down Switching Regulator |
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