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LM2574MX-12 Folha de dados(PDF) 3 Page - Texas Instruments

Nome de Peças LM2574MX-12
Descrição Electrónicos  LM2574/LM2574HV SIMPLE SWITCHER??0.5A Step-Down Voltage Regulator
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LM2574MX-12 Folha de dados(HTML) 3 Page - Texas Instruments

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LM2574, LM2574HV
www.ti.com
SNVS104C – JUNE 1999 – REVISED APRIL 2013
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings
(1) (2)
Maximum Supply Voltage
LM2574
45V
LM2574HV
63V
ON /OFF Pin Input Voltage
−0.3V ≤ V ≤ +VIN
Output Voltage to Ground
(Steady State)
−1V
Minimum ESD Rating
(C = 100 pF, R = 1.5 k
Ω)
2 kV
Storage Temperature Range
−65°C to +150°C
Lead Temperature
(Soldering, 10 seconds)
260°C
Maximum Junction Temperature
150°C
Power Dissipation
Internally Limited
(1)
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured specifications and test
conditions, see the LM2574-3.3, LM2574HV-3.3 Electrical Characteristics.
(2)
If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.
Operating Ratings
Temperature Range
LM2574/LM2574HV
−40°C ≤ TJ ≤ +125°C
Supply Voltage
LM2574
40V
LM2574HV
60V
LM2574-3.3, LM2574HV-3.3 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
LM2574-3.3
Units
LM2574HV-3.3
(Limits)
Typ
Limit (1)
SYSTEM PARAMETERS Test Circuit in Figure 23 and Figure 24,(2)
VOUT
Output Voltage
VIN = 12V, ILOAD = 100 mA
3.3
V
3.234
V(Min)
3.366
V(Max)
VOUT
Output Voltage
4.75V
≤ VIN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A
3.3
V
LM2574
3.168/3.135
V(Min)
3.432/3.465
V(Max)
VOUT
Output Voltage
4.75V
≤ VIN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A
3.3
3.168/3.135
V(Min)
LM2574HV
3.450/3.482
V(Max)
η
Efficiency
VIN = 12V, ILOAD = 0.5A
72
%
(1)
All limits specified at room temperature (Standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level.
(2)
External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2574 is used as shown in the Figure 24 test circuit, system performance will be as shown in system parameters section of
Electrical Characteristics.
Copyright © 1999–2013, Texas Instruments Incorporated
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