All Output Voltage Versions Electrical Characteristics

Parameter

Symbol

Test Condition

Min.

Typ.

Max.

Unit

Device Parameters

Feedback Bias Current

-

10

50

100

nA

Oscillator Frequency

(Note 5)

127

110

150

173

173

KHz

Saturation Voltage

(Note 6,7)

-

1.3

1.4

1.5

V

Max. Duty Cycle (ON)

Min. Duty Cycle (OFF)

DC

(Note 7)

(Note 8)

-

100

0

-

%

Current Limit

Peak Current

(Note 6,7)

3.6

4.5

5.5

6.5

A

Output Leakage Current

Output=0V

(Note 6,8)

-

-

50

uA

Quiescent Current

(Note 8)

-

5

10

mA

Standby Quiescent Current

ON/OFF pin=5V

(Note 9)

-

150

250

300

uA

TO220-5L

-

2.5

-

θ

JC

TO263-5L

Junction to

Case

-

3.5

-

TO220-5L

-

28

-

Thermal Resistance

θ

JA

(Note 10)

TO263-5L

Junction to

ambient

-

23

-

ON/OFF Control

Low (Regulator ON)

-

0.6

ON/OFF Pin Logic Input Threshold

Voltage

High (Regulator OFF)

2.0

1.3

-

V

-

5

15

ON/OFF Pin Input Current

-

0.02

5

uA

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: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect

switching regulator system performance.

Note 3: Typical numbers are at 25

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: The switching frequency is reduced when the second stage current limit is activated.

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

Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.

Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output

transistor switch OFF.

Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in

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