Datasheet
LM2587
SNVS115D –APRIL 2000–REVISED APRIL 2013
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LM2587-5.0 Electrical Characteristics
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.
Symbol Parameters Conditions Typical Min Max Units
SYSTEM PARAMETERS Test Circuit of Figure 7
(1)
V
OUT
Output Voltage V
IN
= 4V to 12V 5.0 4.80/4.75 5.20/5.25 V
I
LOAD
= 500 mA to 1.45A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 12V 20 50/100 mV
ΔV
IN
I
LOAD
= 500 mA
ΔV
OUT
/ Load Regulation V
IN
= 12V 20 50/100 mV
ΔI
LOAD
I
LOAD
= 500 mA to 1.45A
η Efficiency V
IN
= 12V, I
LOAD
= 750 mA 80 %
UNIQUE DEVICE PARAMETERS
(2)
V
REF
Output Reference Measured at Feedback Pin 5.0 4.913/4.900 5.088/5.100 V
Voltage V
COMP
= 1.0V
ΔV
REF
Reference Voltage V
IN
= 4V to 40V 3.3 mV
Line Regulation
G
M
Error Amp I
COMP
= −30 μA to +30 μA 0.750 0.447 1.491 mmho
Transconductance V
COMP
= 1.0V
A
VOL
Error Amp V
COMP
= 0.5V to 1.6V 165 99/49 V/V
Voltage Gain R
COMP
= 1.0 MΩ
(3)
(1) External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the
LM2587 is used as shown in Figure 7 and Figure 8, system performance will be as specified by the system parameters.
(2) All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using
standard Statistical Quality Control (SQC) methods.
(3) A 1.0 MΩ resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring A
VOL
.
LM2587-12 Electrical Characteristics
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.
Symbol Parameters Conditions Typical Min Max Units
SYSTEM PARAMETERS Test Circuit of Figure 8
(1)
V
OUT
Output Voltage V
IN
= 4V to 10V 12.0 11.52/11.40 12.48/12.60 V
I
LOAD
= 300 mA to 1.2A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 10V 20 100/200 mV
ΔV
IN
I
LOAD
= 300 mA
ΔV
OUT
/ Load Regulation V
IN
= 10V 20 100/200 mV
ΔI
LOAD
I
LOAD
= 300 mA to 1.2A
η Efficiency V
IN
= 10V, I
LOAD
= 1A 90 %
UNIQUE DEVICE PARAMETERS
(2)
V
REF
Output Reference Measured at Feedback Pin 12.0 11.79/11.76 12.21/12.24 V
Voltage V
COMP
= 1.0V
ΔV
REF
Reference Voltage V
IN
= 4V to 40 7.8 mV
Line Regulation
G
M
Error Amp I
COMP
= −30 μA to +30 μA 0.328 0.186 0.621 mmho
Transconductance V
COMP
= 1.0V
A
VOL
Error Amp V
COMP
= 0.5V to 1.6V 70 41/21 V/V
Voltage Gain R
COMP
= 1.0 MΩ
(3)
(1) External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the
LM2587 is used as shown in Figure 7 and Figure 8, system performance will be as specified by the system parameters.
(2) All room temperature limits are 100% production tested, and all limits at temperature extremes are specified via correlation using
standard Statistical Quality Control (SQC) methods.
(3) A 1.0 MΩ resistor is connected to the compensation pin (which is the error amplifier output) to ensure accuracy in measuring A
VOL
.
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