LM828 datasheet(2/8 Pages) NSC

2 / 8 page

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage (V+ to

GND, or GND to OUT)

5.8V

V+ and OUT Continuous

Output Current

50 mA

Output Short-Circuit

Duration to GND (Note 2)

1 sec.

Continuous Power

Dissipation (T

A =

25˚C)(Note 3)

240 mW

JMax (Note 3)

150˚C

JA (Note 3)

300˚C/W

Operating Junction

Temperature Range

−40˚C to 85˚C

Storage Temperature

Range

−65˚C to +150˚C

Lead Temp. (Soldering, 10

seconds)

300˚C

ESD Rating (Note 7)

2kV

Electrical Characteristics

Limits in standard typeface are for T

J = 25˚C, and limits in boldface type apply over the full operating temperature range. Un-

less otherwise specified: V+ = 5V, C

1 = C2 = 10 µF. (Note 4)

Symbol

Parameter

Condition

Min

Typ

Max

Units

V+

Supply Voltage

L =10kΩ

1.8

5.5

Supply Current

No Load

µA

115

OUT

Output Resistance (Note 5)

L = 5mA

Ω

OSC

Oscillator Frequency (Note 6)

Internal

kHz

Switching Frequency (Note 6)

Measured at CAP+

kHz

EFF

Power Efficiency

L = 5mA

OEFF

Voltage Conversion Efficiency

No Load

99.96

Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device

beyond its rated operating conditions.

Note 2: OUT may be shorted to GND for one second without damage. However, shorting OUT to V+ may damage the device and should be avoided. Also, for tem-

peratures above 85˚C, OUT must not be shorted to GND or V+, or the device may be damaged.

Note 3: The maximum allowable power dissipation is calculated by using PDMax = (TJMax −TA)/θJA, where TJMax is the maximum junction temperature, TA is the

ambient temperature, and

θJA is the junction-to-ambient thermal resistance of the package.

Note 4: In the test circuit, capacitors C1 and C2 are 10 µF, 0.3Ω maximum ESR capacitors. Capacitors with higher ESR will increase output resistance, reduce output

voltage and efficiency.

Note 5: Specified output resistance includes internal switch resistance and capacitor ESR. See the details in the application information.

Note 6: The output switches operate at one half of the oscillator frequency, fOSC = 2fSW.

Note 7: The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

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