TC2575 Datasheet, PDF (2/25 Pages) TelCom Semiconductor, Inc – 1.0A Step-Down Switching Regulator

1.0A Step-Down Switching Regulator
TC2575
ABSOLUTE MAXIMUM RATINGS*
Maximum Supply Voltage ................................ V_IN = 45V
ON/OFF Pin Input Voltage ..................... –0.3V ≤ V ≤ +V_IN
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 ............................................. 3.0 kV
(Human Body Model: C = 100pF, R = 1.5kΩ)
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, V_IN = 12V for the 3.3V, 5.0V, and Adjustable
version,V_IN = 25V for the 12V version. I_LOAD = 200mA. For typical values T_J = 25°C, for min/max values T_J is the operating
junction temperature range that applies (Note 2), unless otherwise noted.
Symbol
Parameter
Test Conditions
Min
Typ
Max
Units
TC2575-3.3 [(Note 1) Test Circuit Figure 2]
V_OUT
Output Voltage
V_IN = 12V, I_LOAD = 0.2A, T_J = 25°C
4.75V ≤ V_IN ≤ 40V, 0.2A ≤ I_LOAD ≤ 1.0A
T_J = 25°C
T_J = –40°C to +125°
η
Efficiency
V_IN = 12V, I_LOAD = 1.0A
TC2575-5 [(Note 1)Test Circuit Figure 2]
3.234
3.3
3.366
V
3.168
3.3
3.135
—
3.432
3.465
—
75
—
%
V_OUT
Output Voltage
V_IN = 12V, I_LOAD = 0.2A, T_J = 25°C
8.0V ≤ V_IN ≤ 40V, 0.2A ≤ I_LOAD ≤ 1.0A
T_J = 25°C
T_J = –40°C to +125°C
η
Efficiency
V_IN = 12V, I_LOAD = 1.0 A
TC2575-12 [(Note 1) Test Circuit Figure 2]
4.9
5.0
5.1
V
4.8
5.0
5.2
4.75
—
5.25
—
77
—
%
V_OUT
Output Voltage
V_IN = 25V, I_LOAD = 0.2A, T_J = 25°C
15V ≤ V_IN ≤ 40V, 0.2A ≤ I_LOAD ≤ 1.0A
T_J = 25°C
T_J = –40°C to +125°C
η
Efficiency
V_IN = 15V, I_LOAD = 1.0 A
TC2575-Adjustable Version [(Note 1) Test Circuit Figure 2]
11.76
12
12.24
V
11.52
12
11.4
—
12.48
12.6
—
88
—
%
V_FB
Feedback Voltage
V_IN = 12V, I_LOAD = 0.2A, V_OUT = 5.0V,
1.217
1.23
1.243
V
T_J = 25°C
V_FB
Feedback Voltage
8.0V ≤ V_IN ≤ 40V, 0.2A ≤ I_LOAD ≤ 1.0A
V_OUT = 5.0V
T_J = 25°C
1.193
1.23
1.267
T_J = –40°C to +125°C
1.18
—
1.28
η
Efficiency
V_IN = 12V, I_LOAD = 1.0A, V_OUT = 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 TC2575 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 TC2575: T_LOW = –40°C T_HIGH = +125°C
TC2575-1 3/13/00
2