Datasheet
LM2585
SNVS120F –APRIL 2000–REVISED APRIL 2013
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LM2585-12
Symbol Parameters Conditions Typical Min Max Units
SYSTEM PARAMETERS Test Circuit of Figure 20
(1)
V
OUT
Output Voltage V
IN
= 4V to 10V 12.0 11.52/11.40 12.48/12.60 V
I
LOAD
= 0.2A to 0.8A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 10V 20 100/200 mV
ΔV
IN
I
LOAD
= 0.2A
ΔV
OUT
/ Load Regulation V
IN
= 10V 20 100/200 mV
ΔI
LOAD
I
LOAD
= 0.2A to 0.8A
η Efficiency V
IN
= 10V, I
LOAD
= 0.6A 93 %
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 40V 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
LM2585 is used as shown in Figure 19 and Figure 20, 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
.
LM2585-ADJ
Symbol Parameters Conditions Typical Min Max Units
SYSTEM PARAMETERS Test Circuit of Figure 20
(1)
V
OUT
Output Voltage V
IN
= 4V to 10V 12.0 11.52/11.40 12.48/12.60 V
I
LOAD
= 0.2A to 0.8A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 10V 20 100/200 mV
ΔV
IN
I
LOAD
= 0.2A
ΔV
OUT
/ Load Regulation V
IN
= 10V 20 100/200 mV
ΔI
LOAD
I
LOAD
= 0.2A to 0.8A
η Efficiency V
IN
= 10V, I
LOAD
= 0.6A 93 %
UNIQUE DEVICE PARAMETERS
(2)
V
REF
Output Reference Measured at Feedback Pin 1.230 1.208/1.205 1.252/1.255 V
Voltage V
COMP
= 1.0V
ΔV
REF
Reference Voltage V
IN
= 4V to 40V 1.5 mV
Line Regulation
G
M
Error Amp I
COMP
= −30 μA to +30 μA 3.200 1.800 6.000 mmho
Transconductance V
COMP
= 1.0V
A
VOL
Error Amp V
COMP
= 0.5V to 1.6V 670 400/200 V/V
Voltage Gain R
COMP
= 1.0 MΩ
(3)
I
B
Error Amp V
COMP
= 1.0V 125 425/600 nA
Input Bias Current
(1) External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the
LM2585 is used as shown in Figure 19 and Figure 20, 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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