Datasheet LTC3637 (Analog Devices) - 8

LTC3637
BLOCK DIAGRAM
1.3V ACTIVE: 5µA V SLEEP: 1µA + IN 3 VIN ISET 11 CIN PEAK CURRENT COMPARATOR + – RUN 14 + 1.21V – LOGIC L1 SW 1 VOUT + D1 COUT GND OVLO 16 12 – + INTVCC* – REVERSE CURRENT 20µA COMPARATOR FEEDBACK VOLTAGE COMPARATOR INTVCC* REFERENCE FBO 5 + START-UP: 50µA 0.800V NORMAL: 5µA 70Ω + SS SOFTSTART 10 – R1 VFB 9 GND R2 VPRG1 8 7 GND
VPRG2 VPRG1 VOUT R1 R2
VPRG2 17 6 GND GND ADJUSTABLE 1.0M ∞ GND SS 5V FIXED 4.2M 800k IMPLEMENT DIVIDER SS GND 3.3V FIXED 2.5M 800k EXTERNALLY FOR SS SS 1.8V FIXED 1.0M 800k ADJUSTABLE VERSION 3637 BD *WHEN VIN > 5V, INTVCC = 5V WHEN VIN ≤ 5V, INTVCC FOLLOWS VIN 3637fa 8 For more information www.linear.com/LTC3637 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 Typical Application Related Parts