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参数资料
| 型号： | TC2576VAT |
| 元件分类： | 稳压器 |
| 英文描述： | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| 封装： | TO-220, 5 PIN |
| 文件页数： | 12/25页 |
| 文件大小： | 213K |
| 代理商： | TC2576VAT |
TC2576
2
TC2576-2 12/04/00
3.0A Step-Down Switching Regulator
2001 Microchip Technology Inc.
DS21399A
ABSOLUTE MAXIMUM RATINGS*
Maximum Supply Voltage ................................ VIN = 45V
ON/OFF Pin Input Voltage ..................... –0.3V
≤ V ≤ +VIN
Output Voltage to Ground (Steady State) ............... –1.0 V
Max Power Dissipation (TO-220) ........ (Internally Limited)
Thermal Resistance, Junction-to-Ambient ..... 65
°C/W
Thermal Resistance, Junction-to-Case ........ 5.0
°C/W
Storage Temperature Range ................. –65
°C to +150°C
Minimum ESD Rating .................................................. 2.0
(Human Body Model: C = 100 pF, R = 1.5 k
)
Lead Temperature (Soldering, 10 seconds) .......... 260
°C
Maximum Junction Temperature ............................. 150
°C
Operating Junction Temperature Range .... –40 to +125*C
Supply Voltage ............................................................ 40V
*This is a stress rating only, and functional operation of the device at these
or any other conditions beyond those indicated in the operation section of
the specifications is not implied. Exposure to absolute maximum ratings
conditions for extended periods of time may affect device reliability.
ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable
version,VIN = 25V for the 12V version. ILOAD = 500mA. For typical values TJ = 25°C, for min/max values TJ is the operating
junction temperature range that applies [Note 2], unless otherwise noted.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
TC2576-3.3 [(Note 1) Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.5A, TJ = 25°C
3.234
3.3
3.366
V
6.0V
≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3.0A
TJ = 25°C
3.168
3.3
3.432
TJ = –40°C to +125°
3.135
—
3.465
η
Efficiency
VIN = 12V, ILOAD = 3.0 A
—
75
—
%
TC2576-5 [(Note 1)Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.5A, TJ = 25°C
4.9
5.0
5.1
V
8.0V
≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3.0A
TJ = 25°C
4.8
5.0
5.2
TJ = –40°C to +125°C
4.75
—
5.25
η
Efficiency
VIN = 12V, ILOAD = 3.0 A
—
77
—
%
TC2576-12 [(Note 1) Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 25V, ILOAD = 0.5A, TJ = 25°C
11.76
10
12.24
V
15V
≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3.0A
TJ = 25°C
11.52
12
12.48
TJ = –40°C to +125°C
11.4
—
12.6
η
Efficiency
VIN = 15V, ILOAD = 3.0A
—
88
—
%
TC2576-Adjustable Version [(Note 1) Test Circuit Figure 2]
VOUT
Feedback Voltage
VIN = 12V, ILOAD = 0.5A, VOUT = 5.0V,
1.217
1.23
1.243
V
TJ = 25°C
VFBT
Feedback Voltage
8.0V
≤ VIN ≤ 40V, 0.5A ≤ ILOAD ≤ 3.0A
VOUT = 5.0V
TJ = 25°C
1.193
1.23
1.267
TJ = –40°C to +125°C
1.18
—
1.28
η
Efficiency
VIN = 12V, ILOAD = 3.0A, VOUT = 5.0V
—
77
—
%
NOTES: 1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system
performance. When the TC2576 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 TC2576: TLOW = –40°C THIGH = +125°C
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