All Output Voltage Versions

Specifications with standard type face are for T

ture Range. Unless otherwise specified, V

sion. I

Symbol

Parameter

Conditions

LM2597/LM2597HV-XX

Units

(Limits)

Typ

Limit

(Note 4)

(Note 5)

DEVICE PARAMETERS

Current

10

mA(max)

I

STBY

Standby Quiescent

SD /SS pin = 0V

(Note 10)LM2597

85

µA

Current

200/250

µA(max)

LM2597HV

140

250/300

µA(max)

θ

JA

Thermal Resistance

N Package, Junction to Ambient (Note 12)

95

˚C/W

M Package, Junction to Ambient (Note 12)

150

SHUTDOWN/SOFT-START CONTROL Test Circuit of

Figure 12

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 12

Regulator Dropout

Low (Flag ON)

96

%

Detector

92

%(min)

Threshold Voltage

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

V

3

µA

Current

6

µA(max)

Delay Pin Saturation

Low (Flag ON)

55

mV

350/400

mV(max)

BIAS SUPPLY

I

BS

Bias Supply Pin Current

V

(Note 10)

120

µA

400

µA(max)

V

4

mA

10

mA(max)

I

Q

Operating Quiescent

Current

V

1

2

mA

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.

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