Datasheet

LM2585
www.ti.com SNVS120F –APRIL 2000–REVISED APRIL 2013
Electrical Characteristics
LM2585-3.3
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 19
(1)
V
OUT
Output Voltage V
IN
= 4V to 12V 3.3 3.17/3.14 3.43/3.46 V
I
LOAD
= 0.3A to 1.2A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 12V 20 50/100 mV
ΔV
IN
I
LOAD
= 0.3A
ΔV
OUT
/ Load Regulation V
IN
= 12V 20 50/100 mV
ΔI
LOAD
I
LOAD
= 0.3A to 1.2A
η Efficiency V
IN
= 5V, I
LOAD
= 0.3A 76 %
UNIQUE DEVICE PARAMETERS
(2)
V
REF
Output Reference Measured at Feedback Pin 3.3 3.242/3.234 3.358/3.366 V
Voltage V
COMP
= 1.0V
ΔV
REF
Reference Voltage V
IN
= 4V to 40V 2.0 mV
Line Regulation
G
M
Error Amp I
COMP
= −30 μA to +30 μA 1.193 0.678 2.259 mmho
Transconductance V
COMP
= 1.0V
A
VOL
Error Amp V
COMP
= 0.5V to 1.6V 260 151/75 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
.
LM2585-5.0
Symbol Parameters Conditions Typical Min Max Units
SYSTEM PARAMETERS Test Circuit of Figure 19
(1)
V
OUT
Output Voltage V
IN
= 4V to 12V 5.0 4.80/4.75 5.20/5.25 V
I
LOAD
= 0.3A to 1.1A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 12V 20 50/100 mV
ΔV
IN
I
LOAD
= 0.3A
ΔV
OUT
/ Load Regulation V
IN
= 12V 20 50/100 mV
ΔI
LOAD
I
LOAD
= 0.3A to 1.1A
η Efficiency V
IN
= 12V, I
LOAD
= 0.6A 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
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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