Datasheet

LM2588
SNVS117D –APRIL 1998–REVISED APRIL 2013 www.ti.com
LM2588-3.3 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 18
(1)
V
OUT
Output Voltage V
IN
= 4V to 12V
3.3 3.17/3.14 3.43/3.46 V
I
LOAD
= 400 mA to 1.75A
ΔV
OUT
/ Line Regulation V
IN
= 4V to 12V
20 50/100 mV
ΔV
IN
I
LOAD
= 400 mA
ΔV
OUT
/ Load Regulation V
IN
= 12V
20 50/100 mV
ΔI
LOAD
I
LOAD
= 400 mA to 1.75A
η Efficiency V
IN
= 12V, I
LOAD
= 1A 75 %
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 Line V
IN
= 4V to 40V
2.0 mV
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 Voltage V
COMP
= 0.5V to 1.6V
260 151/75 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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