LM2574-12YN Micrel Inc, LM2574-12YN Datasheet - Page 3
![0.5A Step-Down SMPS Regulator ( )](/photos/7/39/73990/576-8-dip_sml.jpg)
LM2574-12YN
Manufacturer Part Number
LM2574-12YN
Description
0.5A Step-Down SMPS Regulator ( )
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet
1.LM2574-5.0YN.pdf
(8 pages)
Specifications of LM2574-12YN
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
12V
Current - Output
500mA
Frequency - Switching
52kHz
Voltage - Input
4.75 ~ 40 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2574-12YN
Manufacturer:
MicrelInc
Quantity:
2 000
Absolute Maximum Ratings
Maximum Supply Voltage
OFF Pin Input Voltage ................................ –0.3V ≤ V ≤ V
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
η
System Parameters, 3.3V Regulators
V
V
η
System Parameters, 5V Regulators
V
V
η
Notes:
1. “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. “Operating Ratings” indicate for which the device is
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.
July 2005
LM2574
OUT
OUT
OUT
OUT
OUT
OUT
LM2574 ...................................................................... 45V
C = 100pF, R = 1.5kΩ ................................................ 2kV
FB Pin ........................................................................ 1kV
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see “Electrical Charac-
teristics.”
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 “Electrical Charac-
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
= 12V, and I
S
) ............. –65°C to +150°C
(3)
(2)
(3)
, Test Circuit Figure 3
, Test Circuit Figure 3
(1)
LOAD
(3)
J
= 25°C, and those with boldface type apply over full Operating Temperature Range.
, Test Circuit Figure 2
= 100mA.
Condition
V
0.1A ≤ I
V
V
V
0.1A ≤ I
V
V
V
0.1A ≤ I
V
V
IN
OUT
IN
IN
OUT
IN
IN
OUT
IN
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 12V, I
= 5V
= 3.3V
= 5V
LOAD
LOAD
LOAD
IN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
3
≤ 0.5A, 7V≤ V
≤ 0.5A, 4.75V ≤ V
≤ 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 ≤ T
OUT
OUT
OUT
OUT
OUT
IN
IN
≤ 40V,
≤ 40V,
= 5V
= 5V
= 3.3V
IN
= 5V
= 5V
≤ 40V,
(1)
1.217
1.193
1.180
3.234
3.168
3.135
4.900
4.800
4.750
Min
J
.......................... 150°C
1.230
1.230
Typ
3.3
3.3
5.0
5.0
78
73
78
1.243
1.267
1.280
3.366
3.432
3.465
5.100
5.200
5.250
Max
M9999-072805
J
Micrel, Inc.
≤ +125°C
Units
%
%
%
V
V
V
V
V
V
V
V
V