LM2576 Series
Typical Performance Characteristics (Circuit of Figure 2)
Normalized Output Voltage
Line Regulation
Dropout Voltage
VIN =20V
I
LOA D = 500mA
ILOA D = 500mA
L1 = 150
Normalized at
=25°C
T
J
=25°C
I
LOA
D
= 3A
TJ
3.3V, 5V & ADJ
12V & 15V
I
LOA
D
= 1A
I
LOA D = 200mA
R
IND = 0.1Ω
JUNCTION TEMPERATURE (°C)
INPUT VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
Standby
Quiescent Current
Quiescent Current
Current Limit
V
IN = 25V
V
IN = 40V
V
OUT = 5V
Measured at
Ground Pin
V
ON/OFF = 5V
IN =12 V
T
J
=25°C
V
I
LOAD = 3A
ILOAD = 200mA
JUNCTION TEMPERATURE (°C)
INPUT VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
Switch Saturation
Voltage
Efficiency
Oscilator Frequency
Normalized at 25°C
I
LOA D = 3A
TJ =25°C
I
LOA
D
= 200mA
15V OUT
5V
-55°C
VIN = 40V
25°C
150°C
ILOA D = 3A
V
IN = 12V
ILOA D
= 200mA
SWITCH CURRENT (A)
INPUT VOLTAGE (V)
JUNCTION TEMPERATURE (°C)
Minimum Operating Voltage
Quiescent Current
vs Duty Cycle
Feedback Voltage
vs Duty Cycle
Adjustable Version Only
Adjustable Version Only
Adjustable Version Only
I
LOAD = 500mA
IN = 40V
VIN = 7V
V
VIN = 40V
V
IN = 7V
V
OUT
≈ 1.23V
I
LOAD = 500mA
ILOAD = 500mA
JUNCTION TEMPERATURE (°C)
DUTY CYCLE (%)
DUTY CYCLE (%)
BEIJING ESTEK ELECTRONICS CO.,LTD
6
ESTEK [ Estek Electronics Co. Ltd ]
