LM2574-12BWM Micrel Semiconductor, LM2574-12BWM Datasheet - Page 3

• Manufacturer Part Number: LM2574-12BWM
• Description: 52kHz Simple 0.5A Buck Regulator
• Manufacturer: Micrel Semiconductor

Absolute Maximum Ratings
Maximum Supply Voltage
OFF Pin Input Voltage ................................ –0.3V
Output Voltage to Ground (Steady State) ..................... –1V
Power Dissipation .................................... Internally Limited
Storage Temperature Range (T
Minimum ESD Rating
Lead Temperature (soldering, 10 sec.) ..................... 260 C
Electrical Characteristics
Specifications with standard typeface are for T
Unless otherwise specified, V
Symbol
System Parameters, Adjustable Regulators
V
V
System Parameters, 3.3V Regulators
V
V
System Parameters, 5V Regulators
V
V
Notes:
1.
2. All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
3. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
December 2003
LM2574
OUT
OUT
OUT
OUT
OUT
OUT
LM2574 ..................................................................... 45V
C = 100pF, R = 1.5k ............................................... 2kV
FB Pin ....................................................................... 1kV
“Absolute Maximum Ratings”
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see
Characteristics.”
production tested. All limits at temperature extremes are guaranteed via testing.
When the LM2574 is used as shown in Figure 1 test circuit, system performance will be shown in system parameters section of
teristics.”
Parameter
Feedback Voltage
Feedback Voltage
(LM2574)
Efficiency
Output Voltage
Output Voltage
(LM2574-3.3)
Efficiency
Output Voltage
Output Voltage
(LM2574-5.0)
Efficiency
IN
indicate limits beyond which damage to the device may occur.
= 12V, and I
S
) ............ –65 C to +150 C
(3)
(2)
(3)
, Test Circuit
, Test Circuit
(1)
LOAD
(3)
J
= 25 C, and those with boldface type apply over full Operating Temperature Range.
, Test Circuit
= 100mA.
Figure 3
Condition
V
0.1A
V
V
V
0.1A
V
V
V
0.1A
V
V
Figure 3
IN
OUT
IN
IN
OUT
IN
IN
OUT
IN
V
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 5V
= 3.3V
= 5V
I
I
I
Figure 2
V
LOAD
LOAD
LOAD
IN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
3
0.5A, 7V V
0.5A, 4.75V
0.5A, 7V V
Operating Ratings
Supply Voltage
Temperature Range
Maximum Junction Temperature (T
= 0.1A, V
= 0.1A, V
= 0.1A, V
= 0.1A
= 0.1A, V
= 0.1A, V
LM2574 ..................................................................... 40V
LM2574 ......................................... –40 C
OUT
OUT
OUT
OUT
OUT
IN
IN
V
= 5V
IN
= 5V
= 3.3V
= 5V
= 5V
40V,
40V,
“Operating Ratings”
40V,
(1)
1.217
1.193
1.180
3.234
3.168
3.135
4.900
4.800
4.750
Min
indicate for which the device is
J ...............................
1.230
1.230
Typ
3.3
3.3
5.0
5.0
78
73
78
“Electrical Charac-
“Electrical
1.243
1.267
1.280
3.366
3.432
3.465
5.100
5.200
5.250
Max
T
M9999-122303
J
+125 C
150 C
Micrel
Units
%
%
%
V
V
V
V
V
V
V
V
V