Datasheet

LM2588
SNVS117D –APRIL 1998–REVISED APRIL 2013 www.ti.com
LM2588-12 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 19
(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 Line V
IN
= 4V to 40V
7.8 mV
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 Voltage V
COMP
= 0.5V to 1.6V 70 41/21 V/V
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
LM2588 is used as shown in Figure 18 and Figure 19, 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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