All Output Voltage Versions

Specifications with standard type face are for T

ture Range. Unless otherwise specified, V

sion. I

Symbol

Parameter

Conditions

LM2599-XX

Units

(Limits)

Typ

Limit

(Note

4)

(Note 5)

DEVICE PARAMETERS

I

Q

Operating Quiescent

SD /SS Pin Open (Note 10)

5mA

Current

10

mA(max)

I

STBY

Standby Quiescent

SD /SS pin = 0V

(Note 11)

80

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 12)

50

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 13)

50

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 14)

30

˚C/W

θ

JA

TO263 Package, Juncton to Ambient (Note 15)

20

˚C/W

SHUTDOWN/SOFT-START CONTROL Test Circuit of

Figure 1

V

SD

Shutdown Threshold

1.3

V

Voltage

Low, (Shutdown Mode)

0.6

V(max)

High, (Soft-start Mode)

2

V(min)

V

SS

Soft-start Voltage

V

2

V

V

3

I

SD

Shutdown Current

V

5µA

10

µA(max)

I

SS

Soft-start Current

V

1.6

µA

5

µA(max)

FLAG/DELAY CONTROL Test Circuit of

Figure 1

Regulator Dropout Detector

Low (Flag ON)

96

%

Threshold Voltage

92

%(min)

98

%(max)

VF

SAT

Flag Output Saturation

I

0.3

V

Voltage

V

0.7/1.0

V(max)

IF

L

Flag Output Leakage Current

V

0.3

µA

Delay Pin Threshold

1.25

V

Voltage

Low (Flag ON)

1.21

V(min)

High (Flag OFF) and V

1.29

V(max)

Delay Pin Source Current

V

3

µA

6

µA(max)

Delay Pin Saturation

Low (Flag ON)

55

mV

350/400

mV(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: 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 into each pin.

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 LM2599

is used as shown in the

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.

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