LM2574-12BN Micrel Inc, LM2574-12BN Datasheet - Page 4

• 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: -

LM2574
Electrical Characteristics
Symbol
Device Parameters, Adjustable Regulator
I
Device Parameters, Fixed and Adjustable Regulators
f
V
DC
I
I
I
I
θ
On/Off Control, Fixed and Adjustable Regulators Test Circuit Figures 2, 3
V
V
I
I
Notes:
4. Output (pin 2) sourcing current. No diode, inductor, or capacitor connected to input.
5. Feedback (pin 4) removed from output and connected to 0V.
6. Feedback (pin 4) removed from output and connected to 12V to force the output transistor OFF.
7. Junction-to-ambient thermal resistance with approximately 1 square inches of PC board copper surrounding the leads.
Test Circuit
M9999-072805
B
o
CL
L
Q
STBY
IH
IL
JA
SAT
IH
IL
Parameter
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Max Duty Cycle (ON)
Current Limit
Output Leakage Current
Quiescent Current
Standby Quiescent Current
Thermal Resistance
ON/OFF Input Level
ON/OFF Input Level
ON/OFF Logic Current
ON/OFF Logic Current
22µF
C
IN
22µF
C
IN
Figure 2. Adjustable Regulator Test Circuit
V
PWR
GND
IN
Figure 3. Fixed Regulator Test Circuit
(adjustable)
LM2574
GND
SI G
P W R
V
GND
IN
Condition
V
Note 8
I
Note 5
Peak Current, t
V
Note 6, Output = –1V
Note 6
ON/OFF Pin = 5V (OFF)
N Package, Junction to Ambient
V
V
ON/OFF = 5V (OFF)
ON/OFF = 0V (ON)
OUT
OUT
IN
OUT
OUT
LM2574–
3.3, 5, 12
OUT
, Note 6, Output = 0V
OFF
ON/
FB
GND
S I G
= 0.5A
= 5V
= 0V
= 5V
OUT
O F F
ON/
F B
(4)
4
11DQ06
ON
330µH
≤ 3µs
11DQ06
330µH
(4)
C
220µF
OU T
C
220µF
(7)
OU T
3.09k
1k
0.65
Min
0.7
2.2
2.4
47
42
93
0.01
Typ
0.8
1.0
7.5
1.4
1.2
50
52
98
50
85
5
4
Max
100
500
200
1.2
1.4
1.6
1.8
1.0
0.8
58
63
30
10
30
10
2
Micrel, Inc.
July 2005
Units
°C/W
kHz
kHz
mA
mA
µA
µA
µA
nA
nA
%
V
V
V
V
V
V
A