1.0A Step-Down Switching Regulator
TC2575
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.
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
ELECTRICAL CHARACTERISTICS: (Unless otherwise specified, VIN = 12V for the 3.3V, 5.0V, and Adjustable
version,VIN = 25V for the 12V version. ILOAD = 200mA. 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
TC2575-3.3 [(Note 1) Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.2A, TJ = 25°C
4.75V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A
TJ = 25°C
3.234
3.3
3.366
V
3.168
3.135
3.3
—
3.432
3.465
TJ = –40°C to +125°
η
Efficiency
VIN = 12V, ILOAD = 1.0A
—
75
—
%
V
TC2575-5 [(Note 1)Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 12V, ILOAD = 0.2A, TJ = 25°C
8.0V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A
TJ = 25°C
4.9
5.0
5.1
4.8
4.75
5.0
—
5.2
5.25
TJ = –40°C to +125°C
η
Efficiency
VIN = 12V, ILOAD = 1.0 A
—
77
—
%
V
TC2575-12 [(Note 1) Test Circuit Figure 2]
VOUT
Output Voltage
VIN = 25V, ILOAD = 0.2A, TJ = 25°C
15V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A
TJ = 25°C
11.76
12
12.24
11.52
11.4
12
—
12.48
12.6
TJ = –40°C to +125°C
η
Efficiency
VIN = 15V, ILOAD = 1.0 A
—
88
—
%
V
TC2575-Adjustable Version [(Note 1) Test Circuit Figure 2]
VFB
Feedback Voltage
VIN = 12V, ILOAD = 0.2A, VOUT = 5.0V,
1.217
1.23
1.243
TJ = 25°C
VFB
Feedback Voltage
8.0V ≤ VIN ≤ 40V, 0.2A ≤ ILOAD ≤ 1.0A
VOUT = 5.0V
TJ = 25°C
TJ = –40°C to +125°C
1.193
1.18
1.23
—
1.267
1.28
η
Efficiency
VIN = 12V, ILOAD = 1.0A, 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 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: TLOW = –40°C THIGH = +125°C
TC2575-1 3/13/00
2
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
