LTC1144
Switched-Capacitor
Wide Input Range
Voltage Converter
with Shutdown
Fea T Descrip T
n
Wide Operating Supply Voltage Range: 2V to 18V The LTC 1144 is a monolithic CMOS switched-capacitor
n
Boost Pin (Pin 1) for Higher Switching Frequency voltage converter. It performs supply voltage conversion
n
Simple Conversion of 15V to 15V Supply from positive to negative from an input range of 2V to
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Low Output Resistance: 120 Maximum 18V, resulting in complementary output voltages of 2V to
n
Power Shutdown to 8A with SHDN Pin 18V. Only two noncritical external capacitors are needed
n
Open Circuit Voltage Conversion Efficiency: for the charge pump and charge reservoir functions.
99.9% Typical
The converter has an internal oscillator that can be
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Power Conversion Efficiency: 93% Typical
overdriven by an external clock or slowed down when
n
Easy to Use
connected to a capacitor. The oscillator runs at a 10kHz
frequency when unloaded. A higher frequency outside the
a T
audio band can also be obtained if the Boost Pin is tied to
+
V . The SHDN pin reduces supply current to 8A and can
n
Conversion of 15V to 15V Supplies
be used to save power when the converter is not in use.
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Inexpensive Negative Supplies
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Data Acquisition Systems The LTC1144 contains an internal oscillator, divide-by- two,
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High Voltage Upgrade to LTC1044 or 7660 voltage level shifter, and four power MOSFETs. A special
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Voltage Division and Multiplications logic circuit will prevent the power N-channel switch
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Automotive Applications substrate from turning on.
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Battery Systems with Wall Adapter/Charger
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical a T
+
Generating 15V from 15V Output Voltage vs Load Current, V = 15V
LTC1144
15
R = 56
1 8
+ OUT
BOOST V 15V INPUT
T = 25C
A
2 7
+
14
CAP OSC
+
3 6
10F GND SHDN
4 5
13
CAP V 15V OUTPUT
OUT
10F
12
1144 TA01
11
10
0 10 20 30 40 50
LOAD CURRENT (mA)
1144 TA02
1144fa
1
For more information www.linear.com/LTC1144
OUTPUT VOLTAGE (V)
+
ion pplica
ions pplica
ion uresLTC1144
a T e Maxi Mu M r a T
(Note 1)
+
Supply Voltage (V ) (Transient) ...............................20V Power Dissipation ............................................. 500mW
+
Supply Voltage (V ) (Operating) .............................. 18V Operating Temperature Range
Input Voltage on Pins 1, 6, 7 LTC1144C................................................. 0C to 70C
+
(Note 2) ............................ 0.3V < V < (V ) + 0.3V LTC1144I ..............................................40C to 85C
IN
Output Short-Circuit Duration Storage Temperature Range .................. 65C to 150C
+
V 10V ..................................................... Indefinite Lead Temperature (Soldering, 10 sec) ...................300C
+
V 15V .......................................................... 30 sec
+
V 20V ............................................. Not Protected
p c F T
TOP VIEW TOP VIEW
+ +
1 8
BOOST 1 8 V BOOST V
+ +
CAP 2 OSC CAP 2 7 OSC
7
GND 3 6 SHDN GND 3 6 SHDN
CAP V
4 5 CAP 4 5 V
OUT OUT
N8 PACKAGE S8 PACKAGE
8-LEAD PLASTIC DIP 8-LEAD PLASTIC SOIC
T = 110C, = 100C/W
T = 110C, = 130C/W
JMAX JA JMAX JA
o r D i n F Ma T
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC1144CN8#PBF LTC1144CN8#TRPBF LTC1144CN8 8-Lead Plastic DIP 0C to 70C
LTC1144IN8#PBF LTC1144IN8#TRPBF LTC1144IN8 8-Lead Plastic DIP 40C to 85C
LTC1144CS8#PBF LTC1144CS8#TRPBF 1144 8-Lead Plastic SOIC 0C to 70C
LTC1144IS8#PBF LTC1144IS8#TRPBF 1144I 8-Lead Plastic SOIC 40C to 85C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: