All Output Voltage Versions

Electrical Characteristics

Specifications with standard type face are for T

ture Range. Unless otherwise specified, V

Symbol

Parameter

Conditions

LM2591HV-XX

Units

(Limits)

Typ

Limit

(Note 3)

(Note 4)

DEVICE PARAMETERS

I

b

Feedback Bias Current

Adjustable Version Only, V

10

nA

50/100

nA (max)

f

O

Oscillator Frequency

(Note 6)

150

kHz

127/110

kHz(min)

173/173

kHz(max)

V

SAT

Saturation Voltage

I

0.95

V

1.2/1.3

V(max)

DC

Max Duty Cycle (ON)

(Note 8)

100

%

Min Duty Cycle (OFF)

(Note 9)

0

I

CLIM

Switch current Limit

Peak Current, (Note 7) (Note 8)

1.9

A

1.3/1.2

A(min)

2.8/3.0

A(max)

I

L

Output Leakage Current

(Note 7) (Note 9) (Note 10)

Output = 0V

50

µA(max)

Output = −1V

5

mA

30

mA(max)

I

Q

Operating Quiescent

SD /SS Pin Open (Note 9)

5mA

Current

10

mA(max)

I

STBY

Standby Quiescent

SD /SS pin = 0V

(Note 10)

90

µA

Current

200/250

µA(max)

θ

JC

Thermal Resistance

TO220 or TO263 Package, Junction to Case

2

˚C/W

θ

JA

TO220 Package, Juncton to Ambient (Note 11)

50

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 12)

50

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 13)

30

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 14)

20

˚C/W

ON/OFF CONTROL Test Circuit Figure 1

ON /OFF Pin Logic Input

1.3

V

V

IH

Threshold Voltage

Low (Regulator ON)

0.6

V(max)

V

IL

High (Regulator OFF)

2.0

V(min)

I

H

ON /OFF Pin Input Current

V

5

µA

15

µA(max)

I

L

V

0.02

µA

5

µA(max)

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: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.

Note 3: Typical numbers are at 25˚C and represent the most likely norm.

Note 4: 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 5: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the

LM2591HV is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics.

Note 6: 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 7: No diode, inductor or capacitor connected to output pin.

Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 9: 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.

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