LTC1983-5 Ver la hoja de datos (PDF) - Linear Technology
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LTC1983-5 Datasheet PDF : 12 Pages
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LTC1983-3/LTC1983-5
100mA Regulated
Charge-Pump Inverters
in ThinSOT
FEATURES
■ Fixed Output Voltages: –3V, –5V or Low Noise VIN
to –VIN Inverted Output
■ ±4% Output Voltage Accuracy
■ Low Quiesient Current: 25µA
■ 100mA Output Current Capability
■ 2.3V to 5.5V Operating Voltage Range
■ Internal 900kHz Oscillator
■ “Zero Current” Shutdown
■ Short-Circuit and Over-Temperature Protected
■ Low Profile (1mm) ThinSOTTM Package
U
APPLICATIO S
■ –3V Generation in Single-Supply Systems
■ Portable Equipment
■ LCD Bias Supplies
■ GaAs FET Bias Supplies
DESCRIPTIO
The LTC®1983-3 and LTC1983-5 are inverting charge
pump DC/DC converters that produce negative regulated
outputs. The parts require only three tiny external capaci-
tors and can provide up to 100mA of output current. The
devices can operate in open loop mode (creating a –VIN
supply) or regulated output mode depending on the input
supply voltage and the output current.
The LTC1983-3/LTC1983-5 have many useful features for
portable applications including very low quiescent current
(25µA typical) and a zero current shutdown mode pro-
grammed through the SHDN pin.
The LTC1983-3/LTC1983-5 are over-temperature and
short-circuit protected. The parts are available in a 6-pin
low profile (1mm) ThinSOT package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
–3V at 100mA DC/DC Converter
VIN
3V TO 5.5V
CIN
10µF
OFF ON
VIN
VOUT
LTC1983-3
SHDN GND
C+
C–
VOUT = –3V
IOUT = UP TO 100mA
COUT
10µF
CFLY
1µF
1983-3 TA01
CFLY: TAIYO YUDEN LMK212BJ105
CIN, COUT: TAIYO YUDEN JMK316BJ106ML
–3.3
–3.2
–3.1
–3.0
–2.9
–2.8
–2.7
0
VOUT vs IOUT
VIN = 5V
VIN = 3.3V
20
40
60
80
100
IOUT (mA)
1983 TA02
1983fa
1
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