LTC1430AC LINER [Linear Technology], LTC1430AC Datasheet
LTC1430AC
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LTC1430AC Summary of contents
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FEATURE S High Power 5V to 1.xV-3.xV Switching Controller: Can Exceed 10A Output Maximum Duty Cycle > 90% Permits 3.3V to 2.xV Conversion Using a Low Power 5V Supply All N-Channel External MOSFETs Fixed Frequency Operation—Small L Excellent Output Regulation: ...
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... CC f Internal Oscillator Frequency OSC (Note 1) Junction Temperature ........................................... 150 C Operating Temperature Range LTC1430AC ............................................. LTC1430AI ........................................ – Storage Temperature Range ................ – 150 C Lead Temperature (Soldering, 10 sec)................. 300 C + 0.3V ORDER PART NUMBER 1 G1 LTC1430ACS8 2 PV ...
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... FETs used. Note 4: The I amplifier can sink but cannot source current. Under LIM normal (not current limited) operation, the I Note 5: The open-loop DC gain and transconductance from the FB pin + (SENSE and SENSE respectively. LTC1430A LTC1430AC LTC1430AI MIN TYP MAX MIN TYP MAX 2.4 2.4 0.8 0.8 0.1 1 ...
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LTC1430A W U TYPICAL PERFOR A CE CHARACTERISTICS I Pin Sink Current MAX vs Temperature 14 13.5 13.0 12.5 12.0 11.5 11.0 10.5 – 40 – 100 TEMPERATURE ( C) 1430 ...
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CTIO S (16-Lead Package/8-Lead Package) G1 (Pin 1/Pin 1): Driver Output 1. Connect this pin to the gate of the upper N-channel MOSFET, Q1. This output will swing from PV to PGND. It will always ...
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LTC1430A W BLOCK DIAGRAM DELAY SHDN 50 s FREQSET COMP LIM + I MAX 12 A TEST CIRCUITS PV CC2 + 100 CC2 + V CC 0 ...
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TEST CIRCUITS SHDN CC SHDN CC2 CC1 NC I MAX NC FREQSET LTC1430A NC COMP NC SS – GND PGND SENSE SENSE Figure 2 + 100 + 4.7 F 0.1 F SHUTDOWN ...
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LTC1430A U U APPLICATIONS INFORMATION OVERVIEW The LTC1430A is a voltage feedback PWM switching regulator controller (see Block Diagram) designed for use in high power, low voltage step-down (buck) converters. It includes an onboard PWM generator, a precision refer- ence ...
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U U APPLICATIONS INFORMATION MOSFET Gate Drive Gate drive for the top N-channel MOSFET Q1 is supplied from PV . This supply must be above PV CC1 power supply input least one power MOSFET V for efficient operation. ...
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LTC1430A PPLICATI S I FOR ATIO scheme input designs where an auxiliary 12V supply is available to power PV and PV CC1 CC2 with R specified can be ...
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PPLICATI S I FOR ATIO A are only 1.1W per device or less — large TO-220 packages and heat sinks are not necessarily required in high effi- ciency applications. Siliconix Si4410DY (in SO-8) and Motorola MTD20N03HL (in ...
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LTC1430A PPLICATI FOR ATIO The output capacitor in a buck converter sees much less ripple current under steady-state conditions than the input capacitor. Peak-to-peak current is equal to that in the inductor, usually a ...
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PPLICATI S I FOR ATIO by using a larger RC filter from the PV work well here. The 10 F capacitor must be VERY close to the part (preferably right underneath the unit) or output regulation ...
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LTC1430A PPLICATI FOR ATIO properly with an RC network from COMP to GND and an additional small C from COMP to GND (Figure 11). Loop stability is affected by inductor and output capacitor values ...
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PPLICATI S I FOR ATIO LTC1430A will be in full operation. An internal switch shorts the SS pin to GND during shutdown. The LTC1430A detects the output current by watching the voltage at I while Q1 ...
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LTC1430A PPLICATI FOR ATIO internal 20 A source and runs at 200kHz. Connecting a 50k resistor from FREQSET to ground will sink an addi- tional 25 A from FREQSET, causing the internal oscillator to ...
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PPLICATI S I FOR ATIO A + 4.7 F 35V 0.1 F GND 220pF 7. 4700pF 0.01 F GND Figure 14. Typical Schematic Showing Layout Considerations + SENSE ...
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... Figure synchronous buck regulator designed to provide a low voltage, very high current output from lower input voltage. The circuit uses two 8-pin LTC1430ACS8s, operated 180 out of phase from each other. Each half of the circuit is good for 15A of output ® current, giving 30A total. The LT 1006 amplifier forces the two half circuits to share the load current equally ...
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PPLICATI FOR ATIO W U LTC1430A 19 ...
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LTC1430A PPLICATI S I FOR ATIO the sense resistors should be well matched. This is accomplished by using trace resistors that are laid out symmetrically. Since they are formed of the same material and processed identically, ...
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PACKAGE DESCRIPTIO 0.007 – 0.0098 (0.178 – 0.249) 0.016 – 0.050 (0.406 – 1.270) * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL ...
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LTC1430A PACKAGE DESCRIPTIO 0.010 – 0.020 (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...
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PACKAGE DESCRIPTIO 0.010 – 0.020 45 (0.254 – 0.508) 0.008 – 0.010 (0.203 – 0.254) 0.016 – 0.050 0.406 – 1.270 * DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES ...
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LTC1430A O U TYPICAL A PPLICATI 15k 0 0.1 F R10 R8 3.3k 130k C3 C6 220pF 0. C11 35V 0.068 F SHDN RELATED PARTS PART NUMBER DESCRIPTION LTC1142 ...