LT3690 block DiagraM VIN 13 V CURRENT SENSE V IN IN 14 VIN – 15 CIN + GND 16 BIAS 19 EN 17 2.5V BST REFERENCE 0.8V 22 2µA SLEEP 0.72V VIN MONITOR OVLO TEMPERATURE UVLO CBST MONITOR TSD HS UVLO SWITCH 12 SW 1, 2 3, 4 – + R Q 23, 24, SW SYNC 25, 26 L 5 SYNC OSCILLATOR SLOPE FF V VOUT 0.17MHz COMP S IN TO 1.5MHz SWITCH COUT V CONTROL CCINT REG 20 BURST MODE RT 7 DETECT LS SOFT-START/TRACKING SWITCH RT + 2.5V 0.8V – ZERO – CVCC ERROR AMP + 2µA + OVLO SS g UVLO 11 –m TSD – C VC CLAMP 6 SS + TSD GND OVLO OVERLOAD 21 UVLO V PG C POWER GOOD 18 8 + 0.72V RC C – F C R1 C FB 9 R2 GND 10 3690 BD 3690fb 10 For more information www.linear.com/LT3690 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 Revision History Typical Application Related Parts
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