All Output Voltage Versions Electrical Characteristics

Specifications with standard type face are for T

less otherwise specified, V

Symbol

Parameter

Conditions

LM2825-XX

Units

(Limits)

Typical

Limit

(Note 6)

(Note 7)

I

CL

DC Output Current

Limit

R

1.4

A

1.2

A(min)

2.4

A(max)

I

Q

Operating Quiescent

Current

SD/SS Pin = 3.1V

5

mA

(Note 8)

10

mA(max)

I

STBY

Standby Quiescent

Current

SD/SS Pin = 0V

65

µA

(Note 8)

200

µA(max)

I

ADJ

Adjust Pin Bias Current

Adjustable Versions Only, V

6

nA

50/100

nA(max)

f

O

Oscillator Frequency

(Note 9)

150

kHz

θ

JA

Thermal Resistance

Junction to Ambient (Note 10)

30

˚C/W

SHUTDOWN/SOFT-START CONTROL Test Circuit

Figure 2

V

SD

Shutdown Threshold

Voltage

1.3

V

Low (Shutdown Mode)

0.6

V(max)

High (Soft-start Mode)

2.0

V(min)

V

SS

Soft-start Voltage

V

2

V

V

3

I

SD

Shutdown Current

V

5µA

(Note 8)

10

µA(max)

I

SS

Soft-start Current

V

1.6

µA

(Note 8)

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 in-

tended 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 5 mA.

Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin.

Note 4: When the LM2825 is used as shown in

Figure 2 test circuit, system performance will be as shown in Electrical Characteristics.

Note 5: When the LM2825 is used as shown in

Figure 3 test circuit, system performance will be as shown in Electrical Characteristics.

Note 6: Typical numbers are at 25˚C and represent the most likely norm.

Note 7: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face) when output current is limited to the value given

in the temperature derating curves. See the application section for curves. All limits at temperature extremes are guaranteed using standard Statistical Quality Control

(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).

Note 9: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current over-

load.

Note 10: Junction to ambient thermal resistance (no external heat sink) for the DIP-24 package with the leads soldered to a printed circuit board with (1 oz.) copper

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