LM2767 datasheet(3/16 Pages) TI

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LM2767

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SNVS069C – FEBRUARY 2000 – REVISED MAY 2013

ELECTRICAL CHARACTERISTICS

Limits in standard typeface are for TJ = 25°C, and limits in boldface type apply over the full operating temperature range.

Unless otherwise specified: V+ = 5V, C1 = C2 = 10 μF.

(1)

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

ROUT

Output Resistance (2)

IL = 15 mA

fOSC

Oscillator Frequency

See(3)

kHz

fSW

Switching Frequency

See(3)

kHz

RL (5.0k) between GND and OUT

PEFF

Power Efficiency

IL = 15 mA to GND

VOEFF

Voltage Conversion Efficiency

No Load

99.96

(1)

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.

(2)

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

positive voltage doubler.

(3)

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

Test Circuit

Figure 4. LM2767 Test Circuit

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