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LTC1044ACS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LTC1044A
1
1044afa
For more information www.linear.com/LTC1044A
Typical applicaTion
FeaTures DescripTion
12V CMOS
Voltage Converter
Generating –10V from 10V Output Voltage vs Load Current, V
+
= 10V
applicaTions
n
1.5V to 12V Operating Supply Voltage Range
n
13V Absolute Maximum Rating
n
200µA Maximum No Load Supply Current at 5V
n
Boost Pin (Pin 1) for Higher Switching Frequency
n
97% Minimum Open Circuit Voltage Conversion
Efficiency
n
95% Minimum Power Conversion Efficiency
n
I
S
= 1.5µA with 5V Supply When OSC Pin = 0V or V
+
n
High Voltage Upgrade to ICL7660/LTC1044
n
Conversion of 10V to ±10V Supplies
n
Conversion of 5V to ±5V Supplies
n
Precise Voltage Division: V
OUT
= V
IN
/2 ±20ppm
n
Voltage Multiplication: V
OUT
= ±nV
IN
n
Supply Splitter: V
OUT
= ±V
S
/2
n
Automotive Applications
n
Battery Systems with 9V Wall Adapters/Chargers
L, LT , LT C , LT M , Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
The LT C
®
1044A is a monolithic CMOS switched-capacitor
voltage converter. It plugs in for ICL7660/LTC1044 in
applications where higher input voltage (up to 12V) is
needed. The LTC1044A provides several conversion func
-
tions without
using inductors. The input voltage can be
inverted (V
OUT
= –V
IN
), doubled (V
OUT
= 2V
IN
), divided
(V
OUT
= V
IN
/2) or multiplied (V
OUT
= ±nV
IN
).
To optimize performance in specific applications, a boost
function is available to raise the internal oscillator frequency
by a factor of seven. Smaller external capacitors can be
used in higher frequency operation to save board space.
The internal oscillator can also be disabled to save power.
The supply current drops to 1.5µA at 5V input when the
OSC pin is tied to GND or V
+
.
1
2
3
4
8
7
6
5
LTC1044A
V
+
OSC
LV
V
OUT
BOOST
CAP
+
GND
CAP
–
+
10µF
+
10µF
10V INPUT
–10V OUTPUT
1044a TA01a
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE (V)
–4
–2
0
40
1044a TA01b
–6
–8
–5
–3
–1
–7
–9
–10
10
20
30
50 60 70 80 90 100
T
A
= 25°C
C1 = C2 = 10µF
SLOPE = 45Ω
LTC1044A
2
1044afa
For more information www.linear.com/LTC1044A
pin conFiguraTion
absoluTe MaxiMuM raTings
Supply Voltage ..........................................................13V
Input Voltage on Pins 1, 6 and 7
(Note 2) ..................................–0.3V < V
IN
< V
+
+ 0.3V
Current into Pin 6
....................................................20µA
Output Short-Circuit Duration
V
+
≤ 6.5V ......................................................Continuous
(Note 1)
1
2
3
4
8
7
6
5
TOP VIEW
BOOST
CAP
+
GND
CAP
–
V
+
OSC
LV
V
OUT
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 110°C, θ
JA
= 100°C/W
1
2
3
4
8
7
6
5
TOP VIEW
V
+
OSC
LV
V
OUT
BOOST
CAP
+
GND
CAP
–
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 110°C, θ
JA
= 130°C/W
Consult factory for military grade parts
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1044ACN8#PBF LTC1044ACN8#TRPBF LTC1044 ACN8 8-Lead Plastic DIP 0°C to 70°C
LTC1044AIN8#PBF LTC1044AIN8#TRPBF LTC1044 AIN8 8-Lead Plastic DIP –40°C to 85°C
LTC1044ACS8#PBF LTC1044ACS8#TRPBF 1044A 8-Lead Plastic SO 0°C to 70°C
LTC1044AIS8#PBF LTC1044AIS8#TRPBF 1044AI 8-Lead Plastic SO –40°C to 85°C
Consult LT C Marketing for parts specified with wider operating temperature ranges.
Consult LT C
Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Operating Temperature Range
LTC1044AC .............................................. 0°C to 70°C
LTC1044AI ........................................... –40°C to 85°C
Storage Temperature Range
................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
.................. 300°C
LTC1044A
3
1044afa
For more information www.linear.com/LTC1044A
elecTrical characTerisTics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Connecting any input terminal to voltages greater than V
+
or less
than ground may cause destructive latchup. It is recommended that no
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 5V, C
OSC
= 0pF, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS
LTC1044AC LTC1044AI
UNITSMIN TYP MAX MIN TYP MAX
I
S
Supply Current R
L
= ∞, Pins 1 and 7, No Connection
R
L
= ∞, Pins 1 and 7, No Connection,
V
+
= 3V
60
15
200 60
15
200 μA
μA
Minimum Supply V
oltage R
L
= 10k
l
1.5 1.5 V
Maximum Supply Voltage R
L
= 10k
l
12 12 V
R
OUT
Output Resistance I
L
= 20mA, f
OSC
= 5kHz
V
+
= 2V, I
L
= 3mA, f
OSC
= 1kHz
l
l
100
120
310
100
130
325
Ω
Ω
Ω
f
OSC
Oscillator Frequency V
+
= 5V, (Note 3)
V
+
= 2V
l
l
5
1
5
1
kHz
kHz
P
EFF
Power Efficiency RL = 5k, f
OSC
= 5kHz 95 98 95 98 %
Voltage Conversion Efficiency RL = ∞ 97 99.9 97 99.9 %
Oscillator Sink or Source
Current
V
OSC
= 0V or V
+
Pin 1 (BOOST) = 0V
Pin 1 (BOOST) = V
+
l
l
3
20
3
20
µA
µA
inputs from sour
ces operating from external supplies be applied prior to
power-up of the LTC1044A.
Note 3: f
OSC
is tested with C
OSC
= 100pF to minimize the effects of test
fixture capacitance loading. The 0pF frequency is correlated to this 100pF
test point, and is intended to simulate the capacitance at pin 7 when the
device is plugged into a test socket and no external capacitor is used.
P1-P3P4-P6P7-P9P10-P12P13-P14

LTC1044ACS8#PBF

Mfr. #:
Buy LTC1044ACS8#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Switched Cap Volt Conv 13V
Lifecycle:
New from this manufacturer.
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