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LM2665 데이터시트(PDF) 5 Page - Texas Instruments

부품명 LM2665
상세설명  Switched Capacitor Voltage Converter
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LM2665 데이터시트(HTML) 5 Page - Texas Instruments

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LM2665
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SNVS009H – NOVEMBER 1999 – REVISED MARCH 2016
Product Folder Links: LM2665
Submit Documentation Feedback
Copyright © 1999–2016, Texas Instruments Incorporated
(1)
In the test circuit, capacitors C1 and C2 are 3.3-µF, 0.3-Ω maximum ESR capacitors. Capacitors with higher ESR increase output
resistance, reduce output voltage and efficiency.
(2)
Min. and Max. limits are ensured by design, test, or statistical analysis.
(3)
Typical numbers are not ensured but represent the most likely norm.
(4)
The minimum input high for the SD pin equals 40% of V+.
(5)
The maximum input low for the SD pin equals 20% of V+.
(6)
Specified output resistance includes internal switch resistance and capacitor ESR. See the details in Application and Implementation for
simple negative voltage converter.
(7)
The output switches operate at one half of the oscillator frequency, ƒOSC = 2ƒSW.
6.5 Electrical Characteristics
MIN and MAX limits apply over the full operating temperature range. Unless otherwise specified: TJ = 25°C, V+ = 5 V,
C1 = C2 = 3.3 μF.
(1)
PARAMETER
TEST CONDITIONS
MIN(2)
TYP(3)
MAX(2)
UNIT
V+
Supply voltage
2.5
5.5
V
IQ
Supply current
No load
650
1250
µA
ISD
Shutdown supply current
1
µA
VSD
Shutdown pin input voltage
Normal operation
2(4)
V
Shutdown mode
0.8(5)
IL
Output current
40
mA
RSW
Sum of the Rds(on)of the four internal
MOSFET switches
IL = 40 mA
3.5
8
Ω
ROUT
Output resistance(6)
IL = 40 mA
12
25
Ω
ƒOSC
Oscillator frequency
See(7)
80
160
kHz
ƒSW
Switching frequency
See(7)
40
80
kHz
PEFF
Power efficiency
RL (1 kΩ) between GND and OUT
90%
94%
IL = 40 mA to GND
90%
VOEFF
Voltage conversion efficiency
No load
99%
99.96%
6.6 Typical Characteristics
(Circuit of Figure 9, V+ = 5 V unless otherwise specified)
Figure 1. Supply Current vs Supply Voltage
Figure 2. Supply Current vs Temperature


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