Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

Preview PDF HTML

LM1577 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM1577
Description  SIMPLE SWITCHER Step-Up Voltage Regulator
PDF  27 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1577 Datasheet(HTML) 4 Page - National Semiconductor (TI)

  LM1577 Datasheet HTML 1Page - National Semiconductor (TI) LM1577 Datasheet HTML 2Page - National Semiconductor (TI) LM1577 Datasheet HTML 3Page - National Semiconductor (TI) LM1577 Datasheet HTML 4Page - National Semiconductor (TI) LM1577 Datasheet HTML 5Page - National Semiconductor (TI) LM1577 Datasheet HTML 6Page - National Semiconductor (TI) LM1577 Datasheet HTML 7Page - National Semiconductor (TI) LM1577 Datasheet HTML 8Page - National Semiconductor (TI) LM1577 Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 4 / 27 page
background image
Electrical Characteristics — LM1577-15, LM2577-15 (Continued)
Specifications with standard type face are for T
J = 25˚C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, V
IN = 5V, and ISWITCH = 0.
LM1577-15
LM2577-15
Units
Symbol
Parameter
Conditions
Typical
Limit
Limit
(Limits)
(Notes 3, 4)
(Note 5)
DEVICE PARAMETERS
Undervoltage
2.70/2.65
2.70/2.65
V(min)
Lockout
3.10/3.15
3.10/3.15
V(max)
f
O
Oscillator Frequency
Measured at Switch Pin
52
kHz
I
SWITCH = 100 mA
48/42
48/42
kHz(min)
56/62
56/62
kHz(max)
V
REF
Output Reference
Measured at Feedback Pin
V
Voltage
V
IN = 3.5V to 40V
15
14.70/14.55
14.70/14.55
V(min)
V
COMP = 1.0V
15.30/15.45
15.30/15.45
V(max)
Output Reference
V
IN = 3.5V to 40V
10
mV
Voltage Line Regulation
R
FB
Feedback Pin Input
12.2
k
Ω
Voltage Line Regulator
G
M
Error Amp
I
COMP = −30 µA to +30 µA
300
µmho
Transconductance
V
COMP = 1.0V
170/110
170/110
µmho(min)
420/500
420/500
µmho(max)
A
VOL
Error Amp
V
COMP = 1.1V to 1.9V
65
V/V
Voltage Gain
R
COMP = 1.0 MΩ
40/20
40/20
V/V(min)
(Note 7)
Error Amplifier
Upper Limit
2.4
V
Output Swing
V
FEEDBACK = 12.0V
2.2/2.0
2.2/2.0
V(min)
Lower Limit
0.3
V
V
FEEDBACK = 18.0V
0.4/0.55
0.40/0.55
V(max)
Error Amp
V
FEEDBACK = 12.0V to 18.0V
±200
µA
Output Current
V
COMP = 1.0V
±130/±90
±130/±90
µA(min)
±300/±400
±300/±400
µA(max)
I
SS
Soft Start Current
V
FEEDBACK = 12.0V
5.0
µA
V
COMP = 0V
2.5/1.5
2.5/1.5
µA(min)
7.5/9.5
7.5/9.5
µA(max)
D
Maximum Duty
V
COMP = 1.5V
95
%
Cycle
I
SWITCH = 100 mA
93/90
93/90
%(min)
Switch
Transconductance
12.5
A/V
I
L
Switch Leakage
V
SWITCH = 65V
10
µA
Current
V
FEEDBACK = 18.0V
300/600
300/600
µA(max)
(Switch Off)
V
SAT
Switch Saturation
I
SWITCH = 2.0A
0.5
V
Voltage
V
COMP = 2.0V
0.7/0.9
0.7/0.9
V(max)
(Max Duty Cycle)
NPN Switch
V
COMP = 2.0V
4.3
A
Current Limit
3.7/3.0
3.7/3.0
A(min)
5.3/6.0
5.3/6.0
A(max)
www.national.com
4



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com