LM2576-3.3BU Micrel Inc, LM2576-3.3BU Datasheet - Page 3
![IC REG BUCK 3A 3.3V TO-263-5](/photos/7/59/75999/576-to-263-5_sml.jpg)
LM2576-3.3BU
Manufacturer Part Number
LM2576-3.3BU
Description
IC REG BUCK 3A 3.3V TO-263-5
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet
1.LM2576WU_TR.pdf
(9 pages)
Specifications of LM2576-3.3BU
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
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