LT3150 Fast Transient Response, Low Input Voltage, Very Low Dropout Linear Regulator Controller UFEATURESDESCRIPTIO ■ Fast Transient Response Optimized with The LT®3150 drives a low cost external N-channel MOSFET Ceramic Output Capacitors as a source follower to produce a fast transient response, ■ FET RDS(ON) Defines Dropout Voltage very low dropout voltage linear regulator. Selection of the ■ ± 1% Reference Tolerance Over Temperature N-channel MOSFET RDS(ON) allows dropout voltages below ■ Multifunction LDO Shutdown Pin with Latchoff 300mV for low VIN to low VOUT applications. ■ Fixed Frequency 1.4MHz Boost Converter Generates The LT3150 includes a fixed frequency boost regulator MOSFET Gate Drive that generates gate drive for the N-channel MOSFET. The ■ Internally Compensated Boost Converter Uses Tiny internally compensated current mode PWM architecture Capacitors and Inductor combined with the 1.4MHz switching frequency permits ■ Independent Boost Converter Shutdown Control the use of tiny, low cost capacitors and inductors. Permits LDO Output Voltage Supply Sequencing ■ 16-Lead SSOP Package The LT3150’s transient load performance is optimized with ceramic output capacitors. A precision 1.21V refer- U ence accommodates low voltage supplies. APPLICATIO S Protection includes a high side current limit amplifier that ■ Microprocessor, ASIC and I/O Supplies activates a fault timer circuit. A multifunction shutdown ■ Very Low Dropout Input-to-Output Conversion pin provides either current limit time-out with latchoff, ■ Logic Termination Supplies overvoltage protection or thermal shutdown. Independent , LTC and LT are registered trademarks of Linear Technology Corporation. shutdown control of the boost converter provides on/off and sequencing control of the LDO output voltage. UTYPICAL APPLICATIO1.8V to 1.5V, 4A Very Low Dropout Linear RegulatorTransient Response for(Typical Dropout Voltage = 65mV at IOUT = 4A)0.1A to 4A Output Load Step MBR0520L + L1 C1 6.19k LT3150 10µH 50mV/DIV 4.7µF 1% VIN2 SW FB1 VIN1 1.37k SHDN2 SHDN1 1% V SWGND I IN POS + C 1.8V GND I IN NEG 5.1Ω 220µF Si4410 2A/DIV GND GATE 2.5V VOUT FB2 ×2 1.5V COMP 243Ω 4A 1.5k 1% 2.2µF ×10 X5R CERAMIC 3150 TA02 6800pF 50pF 1020Ω 0805 CASE 20µs/DIV 1% CIN: PANASONIC SP SERIES EEFUE0E221R 20% C1: AVX TAJA475M020R 20V 20% 3150 TA01 L1: MURATA LQH32CN100K11 OR SUMIDA CDRH3D16100 3150f 1
Купить LT3150CGN#PBF на РадиоЛоцман.Цены — от 169 до 2 103 ₽
