Datasheet

LM2574, LM2574HV
www.ti.com SNVS104C –JUNE 1999–REVISED APRIL 2013
LM2574-15, LM2574HV-15 Electrical Characteristics
Specifications with standard type face are for T
J
= 25°C, and those with boldface type apply over full Operating
Temperature Range.
Symbol Parameter Conditions LM2574-15 Units
LM2574HV-15 (Limits)
Typ Limit
(1)
SYSTEM PARAMETERS Test Circuit in Figure 23 and Figure 24,
(2)
V
OUT
Output Voltage V
IN
= 30V, I
LOAD
= 100 mA 15 V
14.70 V(Min)
15.30 V(Max)
V
OUT
Output Voltage 18V ≤ V
IN
≤ 40V, 0.1A ≤ I
LOAD
≤ 0.5A 15 V
LM2574 14.40/14.25 V(Min)
15.60/15.75 V(Max)
V
OUT
Output Voltage 18V ≤ V
IN
≤ 60V, 0.1A ≤ I
LOAD
≤ 0.5A 15 14.40/14.25 V(Min)
LM2574HV 15.68/15.83 V(Max)
η Efficiency V
IN
= 18V, I
LOAD
= 0.5A 88 %
(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.
LM2574-ADJ, LM2574HV-ADJ Electrical Characteristics
Specifications with standard type face are for T
J
= 25°C, and those with boldface type apply over full Operating
Temperature Range. Unless otherwise specified, V
IN
= 12V, I
LOAD
= 100 mA.
Symbol Parameter Conditions LM2574-ADJ Units
LM2574HV-ADJ (Limits)
Typ Limit
(1)
SYSTEM PARAMETERS Test Circuit in Figure 23 and Figure 24
(2)
V
FB
Feedback Voltage V
IN
= 12V, I
LOAD
= 100 mA 1.230 V
1.217 V(Min)
1.243 V(Max)
V
FB
Feedback Voltage 7V ≤ V
IN
≤ 40V, 0.1A ≤ I
LOAD
≤ 0.5A 1.230 V
LM2574 V
OUT
Programmed for 5V. Circuit of Figure 24 1.193/1.180 V(Min)
1.267/1.280 V(Max)
V
FB
Feedback Voltage 7V ≤ V
IN
≤ 60V, 0.1A ≤ I
LOAD
≤ 0.5A 1.230
LM2574HV
V
OUT
Programmed for 5V. Circuit of Figure 24 1.193/1.180 V(Min)
1.273/1.286 V(Max)
η Efficiency V
IN
= 12V, V
OUT
= 5V, I
LOAD
= 0.5A 77 %
(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.
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