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MAX16929HGUI Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX16929HGUI Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 25 page ���������������������������������������������������������������� Maxim Integrated Products 10 MAX16929 Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators Pin Configuration Pin Description PIN NAME FUNCTION 1 ENP Boost Circuitry and 1.8V/3.3V Regulator Controller Enable Input. ENP has an internal 500kI pulldown resistor. Drive high for normal operation and drive low to place the device (except buck converter) in shutdown. 2 DR 1.8V or 3.3V Regulator Output. DR has a 4.5mA (min) drive capability. For greater output current capa- bility, use an external npn bipolar transistor whose base is connected to DR. 3 FB 1.8V or 3.3V Regulator Feedback Input. FB is regulated to 1.8V or 3.3V. Connect FB to DR when power- ing loads demanding less than 4.5mA. For greater output current capability, use an external npn bipo- lar transistor whose emitter is connected to FB. 4 GATE External p-Channel FET Gate Drive. GATE is an open-drain driver connected to the gate of the external input series p-channel FET. Connect a pullup resistor between GATE and INA. During a fault condition, the gate driver turns off and the pullup resistor turns off the FET. 5 PGNDP Boost Converter Power Ground 6 LXP Boost Converter Switching Node. Connect LXP to the inductor and catch diode of the boost converter. 7 INA Boost Circuitry and 1.8V/3.3V Regulator Controller Power Input. Connect INA to a 3V to 5.5V supply. 8 COMPV Boost Error Amplifier Compensation Connection. Connect a compensation network between COMPV to GND. 9 FBP Boost Converter Feedback Input. FBP is regulated to 1V. Connect FBP to the center of a resistive divid- er connected between the boost output and GND. TOP VIEW TSSOP 25 4 FBGH GATE 26 3 FBGL FB 27 2 REF DR 28 1 SEQ ENP 22 7 DRVN INA 23 6 GND LXP 21 8 GH COMPV 20 9 CP FBP 19 10 PGOOD FBB 18 11 GND AVL 17 12 ENB BST 16 13 INB LXB 24 5 COMPI PGNDP 15 14 INB LXB EP MAX16929 |
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