LM2767 datasheet(5/21 Pages) TI

Part #	LM2767

Description	LM2767 Switched Capacitor Voltage Converter

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LM2767

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SNVS069D – FEBRUARY 2000 – REVISED AUGUST 2015

6.5 Electrical Characteristics

Unless otherwise specified, typical limits are for TJ = 25°C, minimum and maximum limits apply over the full operating

temperature range: V+ = 5 V, C1 = C2 = 10 μF.

(1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V+

Supply voltage

1.8

5.5

V

IQ

Supply current

No load

40

90

µA

IL

Output current

1.8 V

≤ V+ ≤ 5.5 V

15

mA

ROUT

Output resistance(2)

IL = 15 mA

20

40

Ω

ƒOSC

Oscillator frequency

See(3)

8

22

50

kHz

ƒSW

Switching frequency

See(3)

4

11

25

kHz

RL (5 kΩ) between GND and OUT

98%

PEFF

Power efficiency

IL = 15 mA to GND

96%

VOEFF

Voltage conversion efficiency

No load

99.96%

(1)

In the test circuit, capacitors C1 and C2 are 10-µF, 0.3-Ω maximum ESR capacitors. Capacitors with higher ESR may increase output

resistance, and reduce output voltage and efficiency.

(2)

Specified output resistance includes internal switch resistance and capacitor ESR. See the details in Application and Implementation for

positive voltage doubler.

(3)

The output switches operate at one half of the oscillator frequency, ƒOSC = 2 × ƒSW.

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