Datasheet

LM2767
www.ti.com SNVS069C –FEBRUARY 2000–REVISED MAY 2013
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for T
J
= 25°C, and limits in boldface type apply over the full operating temperature range.
Unless otherwise specified: V+ = 5V, C
1
= C
2
= 10 μF.
(1)
Symbol Parameter Condition Min Typ Max Units
V+ Supply Voltage 1.8 5.5 V
I
Q
Supply Current No Load 40 90 µA
I
L
Output Current 1.8V ≤ V+ ≤ 5.5V 15 mA
R
OUT
Output Resistance
(2)
I
L
= 15 mA 20 40 Ω
f
OSC
Oscillator Frequency See
(3)
8 22 50 kHz
f
SW
Switching Frequency See
(3)
4 11 25 kHz
R
L
(5.0k) between GND and OUT 98
P
EFF
Power Efficiency %
I
L
= 15 mA to GND 96
V
OEFF
Voltage Conversion Efficiency No Load 99.96 %
(1) In the test circuit, capacitors C
1
and C
2
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, f
OSC
= 2f
SW
.
Test Circuit
Figure 4. LM2767 Test Circuit
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