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 n 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 n 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. n Inexpensive Negative Supplies n Data Acquisition Systems The LTC1144 contains an internal oscillator, divide-by- two, n High Voltage Upgrade to LTC1044 or 7660 voltage level shifter, and four power MOSFETs. A special n Voltage Division and Multiplications logic circuit will prevent the power N-channel switch n Automotive Applications substrate from turning on. n 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: