LM2576BM
PIN FUNCTIONS
+VIN —This is the positive input supply for the IC switching regulator. A suitable input
bypass capacitor must be present at this pin to minimize voltage transients and to supply the
switching currents needed by the regulator.
Ground —Circuit ground.
Output —Internal switch, the voltage at this pin switches between (+VIN VSAT) and
approximately -0.5V. To minimize coupling to sensitive circuitry, the PC board copper area
connected to this pin should be kept to a minimum.
FeedBack —Senses the regulated output voltage to complete the feedback loop.
—Allows the switching regulator circuit to be shut down using logic level signals. Pulling
this pin below a threshold voltage of approximately 1.5V turns the regulator on, and
shutdown feature is not needed, the ON/OFF pin can be wired to the ground pin or it can be
left open, in either case the regulator will be in the ON condition.
ABSOLUTE MAXIMUM RATINGS (Ta=25°C) *
Characteristic
Maximum supply voltage
Value
Unit
V
45
-0.3V≤V≤+VIN
V
ON /OFF pin input voltage
Output voltage to ground(steady state)
-1
V
Power dissipation
Internally limited
°C
Storage temperature range
-65~+150
kV
Maximum junction temperature
ESD susceptibility (Human Body Model)
2
150
°C
RECOMMENDED OPERATING CONDITIONS
Characteristic
Supply Voltage
Operating temperature range
Symbol
VCC
Value
6～40
Unit
V
-40～+125
°C
3/9
TGS [ Tiger Electronic Co.,Ltd ]
