LM2767 datasheet(3/9 Pages) NSC

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Absolute Maximum Ratings (Note 2)

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 V+ to V

OUT)

5.8V

OUT Continuous Output Current

30 mA

Output Short-Circuit Duration to GND (Note 3)

1 sec.

Continuous Power

Dissipation (T

A = 25˚C)(Note 4)

400 mW

JMax(Note 4)

150˚C

Operating Ratings

JA (Note 4)

210˚C/W

Junction Temperature Range

−40˚C to 100˚C

Ambient Temperature Range

−40˚C to 85˚C

Storage Temperature Range

−65˚C to 150˚C

Lead Temp. (Soldering, 10 sec.)

240˚C

ESD Rating (Note 5)

Human Body Model

Machine Model

2kV

200V

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 6)

Symbol

Parameter

Condition

Min

Typ

Max

Units

V+

Supply Voltage

1.8

5.5

Supply Current

No Load

µA

Output Current

1.8V

≤ V+ ≤ 5.5V

OUT

Output Resistance (Note 7)

L = 15 mA

Ω

OSC

Oscillator Frequency

(Note 8)

kHz

Switching Frequency

(Note 8)

kHz

EFF

Power Efficiency

L (5.0k) between GND and

OUT

L = 15 mA to GND

OEFF

Voltage Conversion Efficiency

No Load

99.96

Note 2: 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 3: VOUT may be shorted to GND for one second without damage. For temperatures above 85˚C, VOUT must not be shorted to GND or device may be damaged.

Note 4: 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 specified package.

Note 5: The human body model is a 100pF capacitor discharged through a 1.5k

Ω resistor into each pin. The machine model is a 200pF capacitor discharged directly

into each pin.

Note 6: 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 7: Specified output resistance includes internal switch resistance and capacitor ESR. See the details in the application information for positive voltage doubler.

Note 8: The output switches operate at one half of the oscillator frequency, fOSC = 2fSW.

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