鈥淚nductorless鈥?/div>
5V to 鈥?5V Converter
FEATURES
s
s
s
s
s
s
DESCRIPTIO
s
s
s
s
50mA Output Current
Plug-In Compatible with ICL7660/LTC1044
R
OUT
= 35鈩?Maximum
300碌A(chǔ) Maximum No Load Supply Current at 5V
Boost Pin (Pin 1) for Higher Switching Frequency
97% Minimum Open-Circuit Voltage Conversion
Efficiency
95% Minimum Power Conversion Efficiency
Wide Operating Supply Voltage Range: 1.5V to 6V
Easy to Use
Low Cost
The LTC
廬
1046 is a 50mA monolithic CMOS switched
capacitor voltage converter. It plugs in for ICL7660/
LTC1044 in 5V applications where more output current is
needed. The device is optimized to provide high current
capability for input voltages of 6V or less. It trades off
operating voltage to get higher output current. The
LTC1046 provides several voltage conversion functions:
the input voltage can be inverted (V
OUT
= 鈥?V
IN
), divided
(V
OUT
=V
IN/
2) or multiplied (V
OUT
=
鹵
nV
IN
).
Designed to be pin-for-pin and functionally compatible
with the ICL7660 and LTC1044, the LTC1046 provides 2.5
times the output drive capability.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
Conversion of 5V to
鹵
5V Supplies
Precise Voltage Division, V
OUT
= V
IN
/2
Supply Splitter, V
OUT
=
鹵
V
S
/2
TYPICAL APPLICATIO
Output Voltage vs Load Current for V
+
= 5V
鈥?
Generating 鈥?5V from 5V
鈥?
OUTPUT VOLTAGE (V)
LTC1046
1
2
BOOST
CAP
+
GND
CAP
鈥?/div>
8
V
+
OSC
LV
V
OUT
7
6
5
鈥?V INPUT
10碌F
5V INPUT
鈥?
ICL7660/LTC1044,
R
OUT
= 55鈩?/div>
LTC1046,
R
OUT
= 27鈩?/div>
+
10碌F
3
4
鈥?
鈥?
1046 TA01
0
0
10
20
30
40
LOAD CURRENT, I
L
(mA)
50
1046 TA02
U
T
A
= 25擄C
+
U
U
1
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