LM2574-12BN Micrel Inc, LM2574-12BN Datasheet - Page 3

• Manufacturer Part Number: LM2574-12BN
• Description: IC REGULATOR BUCK 0.5A 8-DIP
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of LM2574-12BN

• 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: Contains lead / RoHS non-compliant
• Power - Output: -

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