LM2598

SNVS125C – MARCH 1998 – REVISED APRIL 2013

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All Output Voltage Versions Electrical Characteristics (continued)

Symbol

Parameter

Conditions

LM2598-XX

Units

(Limits)

Typ

Limit

(1)

(2)

Standby Quiescent

85

μA

Current

200/250

μA(max)

Thermal Resistance

TO220 or DDPAK Package, Junction to Case

2

°C/W

50

°C/W

50

°C/W

30

°C/W

20

°C/W

SHUTDOWN/SOFT-START CONTROL Test Circuit of Figure 24

Shutdown Threshold

1.3

V

Voltage

Low, (Shutdown Mode)

0.6

V(max)

High, (Soft-start Mode)

2

V(min)

Soft-start Voltage

2

V

3

Shutdown Current

5

μA

10

μA(max)

Soft-start Current

1.6

μA

5

μA(max)

FLAG/DELAY CONTROL Test Circuit of Figure 24

Regulator Dropout Detector

Low (Flag ON)

96

%

Threshold Voltage

92

%(min)

98

%(max)

Flag Output Saturation

0.3

V

Voltage

0.7/1.0

V(max)

Flag Output Leakage Current

0.3

μA

Delay Pin Threshold

1.25

V

Voltage

Low (Flag ON)

1.21

V(min)

1.29

V(max)

Delay Pin Source Current

3

μA

6

μA(max)

Delay Pin Saturation

Low (Flag ON)

55

mV

350/400

mV(max)

(8)

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

(9)

oz.) copper area.

oz.) copper area.

Information in this data sheet and the thermal model in Switchers Made Simple™ version 4.2 software.

6

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