LTC1983-3/LTC1983-5
100mA Regulated
Charge-Pump Inverters
in ThinSOT
Fea T Descrip T
n
Fixed Output Voltages: 3V, 5V or Low Noise V The LTC 1983-3 and LTC1983-5 are inverting charge
IN
to V Inverted Output pump DC/DC converters that produce negative regulated
IN
n
4% Output Voltage Accuracy outputs. The parts require only three tiny external capaci-
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Low Quiescent Current: 25A tors and can provide up to 100mA of output current. The
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100mA Output Current Capability devices can operate in open loop mode (creating a V
IN
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2.3V to 5.5V Operating Voltage Range supply) or regulated output mode depending on the input
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Internal 900kHz Oscillator supply voltage and the output current.
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Zero Current Shutdown
The LTC1983-3/LTC1983-5 have many useful features for
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Short-Circuit and Over-Temperature Protected
portable applications including very low quiescent current
TM
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Low Profile (1mm) ThinSOT Package
(25A typical) and a zero current shutdown mode pro-
grammed through the SHDN pin.
a T
The LTC1983-3/LTC1983-5 are over-temperature and
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3V Generation in Single-Supply Systems
short-circuit protected. The parts are available in a 6-pin
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Portable Equipment
low profile (1mm) ThinSOT package.
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LCD Bias Supplies
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
n
and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the
GaAs FET Bias Supplies
property of their respective owners.
Typical a T
3V at 100mA DC/DC Converter V vs I
OUT OUT
3.3
V V = 3V
IN OUT
V V
IN OUT
3V TO 5.5V I = UP TO 100mA
OUT
C
IN
3.2
C
OUT
LTC1983-3
10F
10F
SHDN GND
OFF ON 3.1
+
V = 5V
IN
C C
3.0
2.9
1983-3 TA01
V = 3.3V
C
FLY IN
1F
2.8
C : TAIYO YUDEN LMK212BJ105
FLY
C , C : TAIYO YUDEN JMK316BJ106ML
IN OUT
2.7
0 20 40 60 80 100
I (mA)
OUT
1983 TA02
1983fc
1
For more information www.linear.com/LTC1983-3
V (V)
OUT
ion pplica
ions pplica
ion uresLTC1983-3/LTC1983-5
a T e Maxi Mu M r a T p c F T
(Note 1)
V to GND ................................................... 0.3V to 6V
IN
SHDN Voltage .............................................. 0.3V to 6V
TOP VIEW
V to GND (LTC1983-3) ...................0.2V to V Max
OUT OUT
V 1 6 SHDN
CC
V to GND (LTC1983-5)...................0.2V to V Max
OUT OUT
V 2 5 GND
OUT
I Max ..............................................................125mA
OUT
+
C 3 4 C
Output Short-Circuit Duration .......................... Indefinite
S6 PACKAGE
Operating Temperature Range (Note 2)....40C to 85C
6-LEAD PLASTIC SOT-23
T = 125C, = 256C/W
JMAX JA
Storage Temperature Range ..................65C to 125C
Lead Temperature (Soldering, 10 sec) ...................300C
o r D i n F Ma T