LM2576BU Micrel Inc, LM2576BU Datasheet - Page 3

• Manufacturer Part Number: LM2576BU
• Description: IC REG BUCK 3A ADJ TO-263-5
• Manufacturer: Micrel Inc
• Type: Step-Down (Buck)r

Specifications of LM2576BU

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 37 V
• Current - Output: 3A
• Frequency - Switching: 42kHz ~ 63kHz
• Voltage - Input: 4 ~ 40 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: D²Pak, TO-263 (5 leads + tab)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LM2576
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
Storage Temperature Range
Minimum ESD Rating
Lead Temperature (soldering, 10 sec.)
Maximum Junction Temperature
Electrical Characteristics
over full Operating Temperature Range. Unless otherwise specified, V
Symbol
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit Figure 1
V
V
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
V
V
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
V
V
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
V
V
August 2005
Absolute Maximum Ratings
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
C = 100pF, R = 1.5k
FB Pin
Parameter
Feedback Voltage
Feedback Voltage
LM2576
Efficiency
Output Voltage
Output Voltage
LM2576-3.3
Efficiency
Output Voltage
Output Voltage
LM2576-5.0
Efficiency
Output Voltage
Output Voltage
LMLM2576-12
Efficiency
Conditions
V
V
0.5A
V
V
V
V
0.5A
V
V
V
V
0.5A
V
V
V
V
0.5A
V
V
IN
OUT
OUT
IN
IN
OUT
OUT
IN
IN
OUT
OUT
IN
IN
OUT
OUT
IN
Specifications with standard typeface are for T
= 12V , I
= 12V, I
= 12V , I
= 12V, I
= 12V , I
= 12V, I
= 25V , I
= 25V, I
(Note 1)
= 5V
= 5V
= 3.3V
= 3.3V
= 5V
= 5V
= 12V
= 12V
I
I
I
I
LOAD
LOAD
LOAD
LOAD
–0.3V
Internally Limited
–65 C to +150 C
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
3A, 8V
3A, 6V
3A, 8V
3A, 15V
V
= 3A, V
= 3A
= 3A
= 3A
= 0.5A
= 0.5A
= 0.5A
= 0.5A
260 C
150 C
+40V
2 kV
1 kV
45V
–1V
V
V
V
OUT
V
IN
IN
IN
IN
3
= 5V
40V
40V
40V
Operating Ratings
Temperature Range
Supply Voltage
40V
IN
= 12V, and I
1.230
1.230
Typ
3.3
3.3
5.0
5.0
82
75
82
12
12
88
J
LOAD
= 25 C, and those with boldface type apply
= 500mA.
11.520/11.400
12.480/12.600
1.193/1.180
1.267/1.280
3.168/3.135
3.432/3.465
4.800/4.750
5.200/5.250
(Note 2)
LM2576
11.760
12.240
1.217
1.243
3.234
3.366
4.900
5.100
Limit
–40 C
M9999-082605-B
T
Micrel, Inc.
J
(Limits)
V(max)
V(max)
V(max)
V(max)
V(max)
V(max)
V(max)
V(max)
V(min)
V(min)
V(min)
V(min)
V(min)
V(min)
V(min)
V(min)
Units
+125 C
%
%
%
%
V
V
V
V
V
V
V
V
40V