Datasheet LT8331 (Analog Devices) - 7

LT8331
BLOCK DIAGRAM
L1 C1 D1 V • IN VOUT R4 R3 C OPT IN OPT L2 COUT • EN/UVLO VIN SW1 SW2 BIAS + + VBIAS + 0.4V(+) – – 4.4V(+) INTERNAL VBIAS – 1.6V(–) 4.0V(–) REFERENCE UVLO + 1.74V(+) UVLO A6 1.6V(–) – TJ > 170°C 3.2V REGULATOR INTV INTV CC CC UVLO SYNC/MODE CVCC RT OSCILLATOR FREQUENCY R5 FOLDBACK ERROR AMP SWITCH M1 SELECT SLOPE LOGIC BURST DRIVER DETECT + ERROR AMP 1.6V VC – – FBX 1.9× R1 A1 MAX VOUT I A5 A7 – LIMIT + + R2 PWM OVER- ERROR + COMPARATOR CURRENT AMP – A2 MAX ILIMIT –0.8V – A3 + ISS 2μA UVLO + M2 OVERCURRENT Q1 SLOPE A4 RSENSE – PGND/GND SS 8331 BD CSS Rev. B For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts