Datasheet LT8471 (Analog Devices) - 8

LT8471
block DiagraM
R3A R3B 2.15V VIN2 OV/UV 1.37V 250k + SR22 UVLO 1.215V – S Q R + 2.15V 0.5V – 250k SR21 S OV/UV Q LOGIC R 50mV + SHOUT SS1 – – DSH C3 CSS1 SOFT- + 0.5V L3 VC1 PEAK C3 START DETECT VIN1 50mV + SKYHOOK DRIVER SS2 – DISABLE Q3 C2 CSS2 SOFT- START VC2 V Q3 SWITCH CONTROL SHOUT-C2 CC V IN1 UVLO AND COMPENSATION VOLTAGE COMPARE CVCC INTERNAL SUPPLY 2.15V REG + 1.215V CURRENT LIMIT VOLTAGE A43 0.789V CONTROLLER – 40mV 80mΩ REFS SYNC SYNC –0.788V BLOCK VC2 SR12 VIN2 – C2 DRIVER A32 R Q Q2 VOUT2 RT ADJUSTABLE OSC + S OSCILLATOR + OSC COMPARATOR C2 RT + A42 R 0.789V SENSE2 R2A – – L2 FB2 RAMP E2 + R GENERATOR 2B RPG2 PG2 0.73V – D2 PGOOD –0.788V DET. GND –0.727V FREQUENCY OSC FOLDBACK VC1 SR11 V L1 – IN1 C1 DRIVER A31 R Q Q1 D1 + + S V 0.789V OUT1 – + COMPARATOR R1A FB1 + A41 RSENSE1 RPG1 – C1 PG1 0.73V – RAMP R –0.788V 1B PGOOD DET. GENERATOR E1 –0.727V FREQUENCY OSC FOLDBACK 8471 BD 8471fd 8 For more information www.linear.com/8471 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Related Parts