TPS65040 datasheet(61/72 Pages) TI

Part #	TPS65040

Description	CLOCK- AND POWER-MANAGEMENT IC FOR RF SYSTEM

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Manufacturer	TI [Texas Instruments]

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SUB

BANDGAP

MAIN

BANDGAP

PowerSupply

Voltage

Detecter

COVREF1

0.01uF

VBN1

VREF1

VREF2

GND1

SBG_EN

MBG_EN

Bias

Current

BuckBoost

DC/DCConverter

LDOs,PAVREF,

AFCDAC

r[PSCNTDC/DC]

CCLK

CDATA

CSTB

SerialInterface

SBG_ENandMBG_EN

comefromthecontrol

logicblock.

COVREF2

0.1uF

TPS65040

SLVS708 – NOVEMBER 2006

Figure 82. Reference Block Diagram

See the following tables for bandgap information:

• Table 18– Sub Bandgap Power-Up Condition

• Table 19– Main bandgap Power-Up Condition (REG_EN=VIO1V8=Hi)

• Table 20– Main Bandgap Power-Down Condition (REG_EN=VIO1V8=Hi)

• Table 21– External Pin Control

• Table 22– VREF1/VREF2 BG Buffer Power-Up Condition

Table 18. Sub Bandgap Power-Up Condition

CONDITION

MBG(1)

SBG(2)

REG_EN

Low

OFF

High

Table 19 or Table 20

ON

(1)

MBG: Main Bandgap

(2)

SBG: Sub Bandgap

61

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