LM2577T-ADJ/NOPB National Semiconductor, LM2577T-ADJ/NOPB Datasheet - Page 3
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LM2577T-ADJ/NOPB
Manufacturer Part Number
LM2577T-ADJ/NOPB
Description
IC REG SIMPLE SWITCHER TO-220-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Up (Boost), Flyback, Forward Converterr
Specifications of LM2577T-ADJ/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
11.4 ~ 12.6 V
Current - Output
3A
Frequency - Switching
52kHz
Voltage - Input
3.5 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-5 (Straight Leads)
Current, Input Bias
100 nA
Current, Output
3 A
Current, Supply
25 mA
Frequency, Oscillator
52 kHz
Package Type
TO-220
Regulation, Line
20 mV
Regulation, Load
20 mV
Regulator Type
Boost (Step-Up)
Resistance, Thermal, Junction To Case
2 °C/W
Temperature, Operating, Range
-40 to +125 °C
Transconductance
3700
Voltage, Gain
800 V/V
Voltage, Input
3.5 to 40 V
Dc To Dc Converter Type
Step Up
Pin Count
5 +Tab
Input Voltage
40V
Output Voltage
11.6 to 12.4V
Switching Freq
48 TO 56KHz
Output Current
3A
Efficiency
80%
Output Type
Adjustable
Switching Regulator
Yes
Load Regulation
50mV
Line Regulation
50mV
Mounting
Through Hole
Input Voltage (min)
3.5V
Operating Temperature Classification
Automotive
For Use With
551011367-061 - BOARD WEBENCH LM2577,LM2585/87
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Other names
*LM2577T-ADJ
*LM2577T-ADJ/NOPB
LM2577T-ADJ
*LM2577T-ADJ/NOPB
LM2577T-ADJ
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM2577T-ADJ/NOPB
Manufacturer:
TOSHIBA
Quantity:
7 600
SYSTEM PARAMETERS Circuit of Figure 1 (Note 6)
V
η
DEVICE PARAMETERS
I
V
f
V
R
G
S
O
OUT
UV
REF
FB
M
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics—LM1577-12, LM2577-12
Specifications with standard type face are for T
Range. Unless otherwise specified, V
Supply Voltage
Output Switch Voltage
Output Switch Current (Note 2)
Power Dissipation
Storage Temperature Range
Lead Temperature
Maximum Junction Temperature
Symbol
(Soldering, 10 sec.)
Output Voltage
Line Regulation
Load Regulation
Efficiency
Input Supply Current
Input Supply
Undervoltage Lockout
Oscillator Frequency
Output Reference
Voltage
Output Reference
Voltage Line Regulator
Feedback Pin Input
Resistance
Error Amp
Transconductance
Parameter
IN
V
I
(Note 3)
V
I
V
I
V
V
I
V
I
Measured at Switch Pin
I
Measured at Feedback Pin
V
V
V
I
V
LOAD
LOAD
LOAD
SWITCH
SWITCH
SWITCH
COMP
= 5V, and I
IN
IN
IN
IN
FEEDBACK
COMP
IN
COMP
IN
COMP
Internally Limited
−65˚C to +150˚C
= 5V to 10V
= 3.5V to 10V
= 5V
= 5V, I
= 3.5V to 40V
= 3.5V to 40V
= 100 mA to 800 mA
= 300 mA
= 100 mA to 800 mA
= −30 µA to +30 µA
= 2.0V (Max Duty Cycle)
= 1.0V
= 1.0V
(Note 1)
= 2.0A
= 100 mA
= 100 mA
J
= 25˚C, and those in bold type face apply over full Operating Temperature
LOAD
= 14V (Switch Off)
Conditions
SWITCH
260˚C
150˚C
6.0A
45V
65V
= 800 mA
= 0.
4
Operating Ratings
Minimum ESD Rating
Supply Voltage
Output Switch Voltage
Output Switch Current
Junction Temperature Range
(C = 100 pF, R = 1.5 kΩ)
LM1577
LM2577
Typical
12.0
2.90
370
7.5
9.7
20
20
80
25
52
12
7
(Notes 3, 4)
11.60/11.40
12.40/12.60
11.76/11.64
12.24/12.36
LM1577-12
10.0/14.0
2.70/2.65
3.10/3.15
225/145
515/615
50/100
50/100
Limit
50/85
48/42
56/62
11.60/11.40
12.40/12.60
11.76/11.64
12.24/12.36
LM2577-12
10.0/14.0
2.70/2.65
3.10/3.15
(Note 5)
225/145
515/615
−55˚C ≤ T
−40˚C ≤ T
50/100
50/100
0V ≤ V
50/85
48/42
56/62
Limit
3.5V ≤ V
I
SWITCH
SWITCH
J
J
≤ +150˚C
≤ +125˚C
µmho(max)
µmho(min)
IN
kHz(max)
mV(max)
mV(max)
mA(max)
mA(max)
kHz(min)
(Limits)
V(max)
V(max)
V(max)
V(min)
V(min)
V(min)
≤ 3.0A
Units
µmho
≤ 40V
≤ 60V
kHz
mV
mV
mA
mA
mV
kΩ
2 kV
%
V
V
V