lm2577sx-adj National Semiconductor Corporation, lm2577sx-adj Datasheet - Page 4

• Manufacturer Part Number: lm2577sx-adj
• Description: Simple Switcher Step-up Voltage Regulator
• Manufacturer: National Semiconductor Corporation

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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