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LM2577M-ADJ Datasheet(PDF) 4 Page - Texas Instruments

Part # LM2577M-ADJ
Description  SIMPLE SWITCHER짰 Step-Up Voltage Regulator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LM2577M-ADJ Datasheet(HTML) 4 Page - Texas Instruments

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LM1577, LM2577
SNOS658D – JUNE 1999 – REVISED APRIL 2013
www.ti.com
Electrical Characteristics—LM1577-12, LM2577-12 (continued)
Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature
Range. Unless otherwise specified, VIN = 5V, and ISWITCH = 0.
Symbol
Parameter
Conditions
Typical
LM1577-12
LM2577-12
Units
Limit(1)(2)
Limit(3)
(Limits)
VUV
Input Supply
ISWITCH = 100 mA
2.90
V
Undervoltage Lockout
2.70/2.65
2.70/2.65
V(min)
3.10/3.15
3.10/3.15
V(max)
fO
Oscillator Frequency
Measured at Switch Pin
52
kHz
ISWITCH = 100 mA
48/42
48/42
kHz(min)
56/62
56/62
kHz(max)
VREF
Output Reference
Measured at Feedback Pin
V
Voltage
VIN = 3.5V to 40V
12
11.76/11.64
11.76/11.64
V(min)
VCOMP = 1.0V
12.24/12.36
12.24/12.36
V(max)
Output Reference
VIN = 3.5V to 40V
7
mV
Voltage Line Regulator
RFB
Feedback Pin Input
9.7
k
Ω
Resistance
GM
Error Amp
ICOMP = −30 μA to +30 μA
370
μmho
Transconductance
VCOMP = 1.0V
225/145
225/145
μmho(min)
515/615
515/615
μmho(max)
AVOL
Error Amp
VCOMP = 1.1V to 1.9V
80
V/V
Voltage Gain
RCOMP = 1.0 MΩ
(5)
50/25
50/25
V/V(min)
Error Amplifier
Upper Limit
2.4
V
Output Swing
VFEEDBACK = 10.0V
2.2/2.0
2.2/2.0
V(min)
Lower Limit
0.3
V
VFEEDBACK = 15.0V
0.40/0.55
0.40/0.55
V(max)
Error Amplifier
VFEEDBACK = 10.0V to 15.0V
±200
μA
Output Current
VCOMP = 1.0V
±130/±90
±130/±90
μA(min)
±300/±400
±300/±400
μA(max)
ISS
Soft Start Current
VFEEDBACK = 10.0V
5.0
μA
VCOMP = 0V
2.5/1.5
2.5/1.5
μA(min)
7.5/9.5
7.5/9.5
μA(max)
D
Maximum Duty Cycle
VCOMP = 1.5V
95
%
ISWITCH = 100 mA
93/90
93/90
%(min)
Switch
12.5
A/V
Transconductance
IL
Switch Leakage
VSWITCH = 65V
10
μA
Current
VFEEDBACK = 15V (Switch Off)
300/600
300/600
μA(max)
VSAT
Switch Saturation
ISWITCH = 2.0A
0.5
V
Voltage
VCOMP = 2.0V (Max Duty Cycle)
0.7/0.9
0.7/0.9
V(max)
NPN Switch
4.5
A
Current Limit
3.7/3.0
3.7/3.0
A(min)
5.3/6.0
5.3/6.0
A(max)
(5)
A 1.0 M
Ω resistor is connected to the compensation pin (which is the error amplifier's output) to ensure accuracy in measuring AVOL. In
actual applications, this pin's load resistance should be
≥10 MΩ, resulting in AVOL that is typically twice the ensured minimum limit.
4
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Copyright © 1999–2013, Texas Instruments Incorporated
Product Folder Links: LM1577 LM2577


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