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LM2675 Scheda tecnica(PDF) 4 Page - Texas Instruments

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Il numero della parte LM2675
Spiegazioni elettronici  SIMPLE SWITCHER짰 Power Converter High Efficiency 1A Step-Down Voltage Regulator
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LM2675
SNVS129E – MAY 2004 – REVISED JUNE 2005
www.ti.com
LM2675-3.3 Electrical Characteristics
Specifications with standard type face are for TJ = 25°C, and those with bold type face apply over full Operating
Temperature Range.
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 7 (3)
VOUT
Output Voltage
VIN = 8V to 40V, ILOAD = 20 mA to 1A
3.3
3.251/3.201
3.350/3.399
V
VOUT
Output Voltage
VIN = 6.5V to 40V, ILOAD = 20 mA to 500 mA
3.3
3.251/3.201
3.350/3.399
V
η
Efficiency
VIN = 12V, ILOAD = 1A
86
%
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits guaranteed 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 guaranteed via correlation using standard Statistical Quality
Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2675 is used as shown in Figure 7 Figure 8 test circuits, system performance will be as
specified by the system parameters section of the Electrical Characteristics.
LM2675-5.0 Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 7 (3)
VOUT
Output Voltage
VIN = 8V to 40V, ILOAD = 20 mA to 1A
5.0
4.925/4.850
5.075/5.150
V
VOUT
Output Voltage
VIN = 6.5V to 40V, ILOAD = 20 mA to 500 mA
5.0
4.925/4.850
5.075/5.150
V
η
Efficiency
VIN = 12V, ILOAD = 1A
90
%
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits guaranteed 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 guaranteed via correlation using standard Statistical Quality
Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2675 is used as shown in Figure 7 Figure 8 test circuits, system performance will be as
specified by the system parameters section of the Electrical Characteristics.
LM2675-12 Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 7 (3)
VOUT
Output Voltage
VIN = 15V to 40V, ILOAD = 20 mA to 1A
12
11.82/11.64
12.18/12.36
V
η
Efficiency
VIN = 24V, ILOAD = 1A
94
%
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits guaranteed 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 guaranteed via correlation using standard Statistical Quality
Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2675 is used as shown in Figure 7 Figure 8 test circuits, system performance will be as
specified by the system parameters section of the Electrical Characteristics.
LM2675-ADJ Electrical Characteristics
Symbol
Parameter
Conditions
Typ(1)
Min(2)
Max(2)
Units
SYSTEM PARAMETERS Test Circuit Figure 8 (3)
VFB
Feedback Voltage
VIN = 8V to 40V, ILOAD = 20 mA to 1A
VOUT Programmed for 5V
1.210
1.192/1.174
1.228/1.246
V
(see Circuit of Figure 8)
(1)
Typical numbers are at 25°C and represent the most likely norm.
(2)
All limits guaranteed 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 guaranteed via correlation using standard Statistical Quality
Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(3)
External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator performance. When the LM2675 is used as shown in Figure 7 Figure 8 test circuits, system performance will be as
specified by the system parameters section of the Electrical Characteristics.
4
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