TPS62361BYZHT datasheet(30/52 Pages) TI

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HS-Master Code

Data

A/A

From TPS6236x to Master

From Master to TPS6236x

Acknowledge

START condition

REPEATED START condition

STOP condition

Slave Address

R/W

F/S Mode

H/S Mode

F/S Mode

Slave Address

H/S Mode continues

Data Transferred

(n x Bytes + Acknowledge)

TPS62360, TPS62361B, TPS62362

SLVSAU9A

– MAY 2011 – REVISED AUGUST 2011

www.ti.com

Figure 47. Data Transfer Format in H/S-Mode

Slave Address Byte

MSB

LSB

The slave address byte is the first byte received following the START condition from the master device.

MSB

LSB

Following the successful acknowledgment of the slave address, the bus master will send a byte to the

TPS6236x, which will contain the address of the register to be accessed.

2C REGISTER RESET

The I2C registers can be reset by pulling VDD to GND. Refer to the Input Under Voltage Protection section for

details.

PULL DOWN RESISTORS

The EN, VSEL0 and VSEL1 inputs feature internal pull down resistors to discharge the potential if one of the pins

is not connected or is triggered by a high impedance source.

To achieve lowest possible quiescent current, the pull down resistors can be disabled individually at EN, VSEL0

and VSEL1 by I2C programming the registers PD_EN, PD_VSEL0 and PD_VSEL1.

By default, the pull down resistors are enabled.

INPUT CAPACITOR SELECTION

The input capacitor is required to buffer the pulsing current drawn by the device at VIN and reducing the input

voltage ripple. The pulsing current is originated by the operation principles of a step down converter.

Low ESR input capacitors are required for best input voltage filtering and minimal interference with other system

components. For best performance, ceramic capacitors with a low ESR at the switching frequency are

recommended. X7R or X5R type capacitors should be used.

A ceramic input capacitor in the nominal range of CIN = 4.7µF to 22µF should be a good choice for most

application scenarios. In general, there is no upper limit for increasing the input capacitor.

For typical operation, a 10

µF X5R type capacitor is recommended. Table 7 shows a list of recommended

capacitors.

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Product Folder Link(s): TPS62360 TPS62361B TPS62362

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