All Output Voltage Versions

Specifications with standard type face are for T

ture Range. Unless otherwise specified, V

Symbol

Parameter

Conditions

LM2590HV-XXX-AQ

Units

Min

Typ

Max

(Note 5)

(Note 4)

(Note 5)

FLAG/DELAY CONTROL Test Circuit of Figure 1

Regulator Dropout

Detector Threshold

Voltage

Low (Flag ON)

92

96

98

%

VF

SAT

Flag Output

Saturation Voltage

I

V

0.3

0.7

1.0

V

IF

L

Flag Output

Leakage Current

V

0.3

µA

VD

TH

Delay Pin

Threshold Voltage

V

1.21

1.25

1.29

V

I

DELAY

Delay Pin Source

Current

V

3

6

µA

ID

SAT

Delay Pin

Saturation

Low (Flag ON)

70

350

400

mV

mV

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 0

Ω 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 12: Junction to ambient thermal resistance (no external heat sink) for the package mounted TO-220 package mounted vertically, with the leads soldered to

model in Switchers Made Simple available at http://power.national.com.

www.national.com

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