MAX16929_12 Datasheet, PDF(10/25 Page) Maxim Integrated Products – Automotive TFT-LCD Power Supply with Boost Converter and Gate Voltage Regulators

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MAX16929

Automotive TFT-LCD Power Supply with Boost

Converter and Gate Voltage Regulators

Pin Configuration

TOP VIEW

ENP 1

DR 2

FB 3

GATE 4

PGNDP 5

LXP 6

INA 7

COMPV 8

FBP 9

FBB 10

AVL 11

BST 12

LXB 13

LXB 14

MAX16929

TSSOP

28 SEQ

27 REF

26 FBGL

25 FBGH

24 COMPI

23 GND

22 DRVN

21 GH

20 CP

19 PGOOD

18 GND

17 ENB

16 INB

15 INB

Pin Description

NAME

FUNCTION

Boost Circuitry and 1.8V/3.3V Regulator Controller Enable Input. ENP has an internal 500kI pulldown

ENP resistor. Drive high for normal operation and drive low to place the device (except buck converter) in

shutdown.

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.

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.

External p-Channel FET Gate Drive. GATE is an open-drain driver connected to the gate of the external

GATE 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.

PGNDP Boost Converter Power Ground

LXP Boost Converter Switching Node. Connect LXP to the inductor and catch diode of the boost converter.

INA Boost Circuitry and 1.8V/3.3V Regulator Controller Power Input. Connect INA to a 3V to 5.5V supply.

COMPV

Boost Error Amplifier Compensation Connection. Connect a compensation network between COMPV to

GND.

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.

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