LTC1143LCS#TR Linear Technology, LTC1143LCS#TR Datasheet
LTC1143LCS#TR
Specifications of LTC1143LCS#TR
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LTC1143LCS#TR Summary of contents
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... The LTC1143 series is ideal for applications requiring dual output voltages with high conversion efficiencies over a wide load current range in a small amount of board space. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation ...
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LTC1143/LTC1143L LTC1143L-ADJ ABSOLUTE MAXIMUM Input Supply Voltage (Pins 5,13) ............... 16V to –0.3V Continuous Output Current (Pins 4,12) ................ 50mA Sense Voltages (Pins 16) V 12.7V .......................................... 13V to – 0. < ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER Current Sense Threshold Voltage LTC1143/LTC1143L 8 9 LTC1143L-ADJ Shutdown Pin Threshold 2 10 LTC1143/LTC1143L Shutdown Pin Input Current 2 10 LTC1143/LTC1143L ...
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LTC1143/LTC1143L LTC1143L-ADJ W U TYPICAL PERFORMANCE CHARACTERISTICS 5V Output Efficiency 100 10V 100 1000 LOAD CURRENT (mA) LTC1143 G01 3.3V Efficiency vs Input Voltage 100 ...
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W U TYPICAL PERFORMANCE CHARACTERISTICS Gate Charge Supply Current 100nC 29nC 200 260 140 OPERATING FREQUENCY (kHz) LTC1143 G10 PIN FUNCTIONS ...
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LTC1143/LTC1143L LTC1143L-ADJ PIN FUNCTIONS V (Pin 13): Supply Pin, 3.3V Section. Must be closely IN3 decoupled to 3.3V power ground Pin 3. C (Pin 14): External capacitor sets the operating frequency for the 3.3V ...
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U U FUNCTIONAL DIAGRA Only one regulator block shown. Connections shown for LT1143/LTC1143L; changes create LTC1143L-ADJ SLEEP – – V TH1 V TH2 T + OFF-TIME 14(6) CONTROL OPERATION Refer to Functional Diagram and ...
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LTC1143/LTC1143L LTC1143L-ADJ U OPERATION Refer to Functional Diagram and Figure 1 The circuit now enters sleep mode with the power MOSFET turned off. In sleep mode a majority of the circuitry is turned off, dropping the quiescent current from 1.6mA ...
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U U APPLICATIONS INFORMATION 0.20 0.15 0.10 0. MAXIMUM OUTPUT CURRENT (A) Figure 2. Selecting R The load current below which Burst Mode operation commences and the peak short circuit current, BURST I ...
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LTC1143/LTC1143L LTC1143L-ADJ U U APPLICATIONS INFORMATION Once the frequency has been set chosen to provide no more than 25mV/R to-peak inductor ripple current. This results in a minimum required inductor value of 5.1(10 )(R ...
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U U APPLICATIONS INFORMATION but = 0.005/ C can be used as an approximation for low voltage MOSFETs. When selecting the P-channel power MOSFET for each section, consideration should be given to using a dual MOSFET with the other half ...
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LTC1143/LTC1143L LTC1143L-ADJ U U APPLICATIONS INFORMATION Aluminum electrolytic and dry tantalum capacitors are both available in surface mount configurations. In the case of tantalum it is critical that the capacitors are surge tested for use in switching power supplies. An ...
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U U APPLICATIONS INFORMATION drawn from V , the resulting loss increases with IN input voltage. For V = 10V the DC bias losses are IN generally less than 1% for load currents over 30mA. However at very low load ...
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LTC1143/LTC1143L LTC1143L-ADJ U U APPLICATIONS INFORMATION The LTC1143L-ADJ outputs can be turned off in one of two ways placing a power MOSFET switch in the V to the entire regulator pulling the V 1.4V, which ...
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U U APPLICATIONS INFORMATION (a) CONTINUOUS MODE OPERATION (b) Burst Mode OPERATION Figure 7. C Waveforms T Auxiliary Windings––Suppressing Burst Mode Operation The LTC1143 series operates nonsynchronously with the normal limitation that the power drawn from the inductor primary winding ...
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LTC1143/LTC1143L LTC1143L-ADJ U U APPLICATIONS INFORMATION 5) Is the V decoupling capacitor (1 F, 0.1 F) con- IN nected closely between Pin 13 (5) and GND Pin 3 (11)? This capacitor carries the MOSFET driver peak currents. 6) For the ...
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U TYPICAL APPLICATIONS C + IN3 22 F 25V 2 P1A L1 R SENSE3 50 H 0.10 V OUT3 3.3V/1A 0. OUT3 D1 220 F MBRS140T3 10V AVX TPSD226K025R0200 IN3 IN5 C ...
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LTC1143/LTC1143L LTC1143L-ADJ U TYPICAL APPLICATIONS + C IN1 22 F 0.22 F 25V SENSE1 27 H 0.05 V OUT1 3.3V/2A 1 1000pF C + OUT1 220 F 82.5k MBRS130L 10V 1% 2 ...
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... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... Dual Synchronous Controller with Auxiliary Linear Regulator Controller and 5V Standby LTC1539 Dual Synchronous Controller with Phase-Locked Loop TM and Adaptive Power Operation Adaptive Power is a trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 www.linear-tech.com ...