Datasheet

LM2588
www.ti.com SNVS117D –APRIL 1998–REVISED APRIL 2013
LM2588-ADJ 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
1.230 1.208/1.205 1.252/1.255 V
Voltage V
COMP
= 1.0V
ΔV
REF
Reference Voltage Line V
IN
= 4V to 40V
1.5 mV
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 Voltage V
COMP
= 0.5V to 1.6V
670 400/200 V/V
Gain R
COMP
= 1.0 MΩ
(3)
I
B
Error Amp Input Bias V
COMP
= 1.0V
125 425/600 nA
Current
(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
.
All Output Voltage Versions Electrical Characteristics
(1)
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
I
S
Input Supply Current Switch Off
(2)
11 15.5/16.5 mA
I
SWITCH
= 3.0A 85 140/165 mA
I
S/D
Shutdown Input V
SH
= 3V
16 100/300 μA
Supply Current
V
UV
Input Supply R
LOAD
= 100Ω
3.30 3.05 3.75 V
Undervoltage Lockout
f
O
Oscillator Frequency Measured at Switch Pin
R
LOAD
= 100Ω, V
COMP
= 1.0V 100 85/75 115/125 kHz
Freq. Adj. Pin Open (Pin 1)
R
SET
= 22 kΩ 200 kHz
f
SC
Short-Circuit Frequency Measured at Switch Pin
25 kHz
R
LOAD
= 100Ω
V
FEEDBACK
= 1.15V
V
EAO
Error Amplifier Output Upper Limit
(3)
2.8 2.6/2.4 V
Swing
Lower Limit
(2)
0.25 0.40/0.55 V
(1) 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.
(2) To measure this parameter, the feedback voltage is set to a high value, depending on the output version of the device, to force the error
amplifier output low and the switch off.
(3) To measure this parameter, the feedback voltage is set to a low value, depending on the output version of the device, to force the error
amplifier output high and the switch on.
Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: LM2588