lm2590hvtadj-aq National Semiconductor Corporation, lm2590hvtadj-aq Datasheet - Page 4

• Manufacturer Part Number: lm2590hvtadj-aq
• Description: Simple Switcher Power Converter 150 Khz 1a Step-down Voltage Regulator, With Features
• Manufacturer: National Semiconductor Corporation

www.national.com
Symbol
FLAG/DELAY CONTROL Test Circuit of Figure 1
VF
IF
I
ID
VD
DELAY
All Output Voltage Versions
Electrical Characteristics
Specifications with standard type face are for T
ture Range. Unless otherwise specified, V
L
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Voltage internally clamped. If clamp voltage is exceeded, limit current to a maximum of 1 mA.
Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor; the Machine Model is 200pF discharged through a 0Ω resistor.
Note 4: Typical numbers are at 25˚C and represent the most likely norm.
Note 5: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used
to calculate Average Outgoing Quality Level (AOQL).
Note 6: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the
LM2590HV-AQ is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.
Note 7: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current
overload.
Note 8: No diode, inductor or capacitor connected to output pin.
Note 9: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 10: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version to force the output transistor switch OFF.
Note 11: V
Note 12: Junction to ambient thermal resistance (no external heat sink) for the package mounted TO-220 package mounted vertically, with the leads soldered to
a printed circuit board with (1 oz.) copper area of approximately 1 in
Note 13: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 0.5 in
Note 14: Junction to ambient thermal resistance with the TO-263 package tab soldered to a single sided printed circuit board with 2.5 in
Note 15: Junction to ambient thermal resistance with the TO-263 package tab soldered to a double sided printed circuit board with 3 in
the LM2590HVS-AQ side of the board, and approximately 16 in
model in Switchers Made Simple available at http://power.national.com.
SAT
SAT
TH
Regulator Dropout
Detector Threshold
Voltage
Flag Output
Saturation Voltage
Flag Output
Leakage Current
Delay Pin
Threshold Voltage
Delay Pin Source
Current
Delay Pin
Saturation
IN
Parameter
= 60V.
Low (Flag ON)
I
V
V
V
V
Low (Flag ON)
SINK
DELAY
FLAG
OUT
DELAY
= 3 mA
Regulated
= 60V
= 0.5V
= 0.5V
IN
(Continued)
= 12V for the 3.3V, 5V, and Adjustable version. I
Conditions
J
2
= 25˚C, and those with boldface type apply over full Operating Tempera-
of copper on the other side of the p-c board. See application hints in this data sheet and the thermal
2
.
4
(Note 5)
1.21
Min
92
LM2590HV-XXX-AQ
(Note 4)
LOAD
1.25
Typ
0.3
0.3
96
70
3
= 500 mA
2
(Note 5)
of (1 oz.) copper area on
2
2
Max
1.29
350
400
0.7
1.0
of (1 oz.) copper area.
of (1 oz.) copper area.
98
6
Units
mV
mV
µA
µA
%
V
V