Shenzhen Nanbeihang Electronic Development Co., Ltd: Shenzhen, Guangdong, China; Main products: Integrated circuit IC, Chip IC, Connector, sensor, Diode triode, STM, TI , JST, TE

Home > Products > IC > TPS54618QRTERQ1 Switch Regulator TI Original From Stock

TPS54618QRTERQ1 Switch Regulator TI Original From Stock

FOB Price

Negotiable / Piece

1 Piece(Min. Order)

Request Sample Customized Request Request Free Catalogs

Contact Now

Get lowest price

Product Details

Brand Name	TI	Place of Origin	Albania
Model Number	TPS54618QRTERQ1	Type	Drive IC
Package	9000	D/C	22+

Product Description

Introduction

The TPS54618-Q1 device is a full-featured 6-Vin, 6-A, synchronous step-down current-mode DC-DC

converter with two integrated metal-oxide-semiconductor field-effect transistors (MOSFETs). The

TPS54618-Q1 device can operate in a wide range of switching frequencies from 200-KHz to 2-MHz. The

switching frequency can be set using a pulldown resistor or an externally applied signal at the RT pin as

shown in Figure 1. Refer to Interfacing TPS57xxx-Q1,TPS65320-Q1 Family, and TPS65321-Q1 Devices

With Low Impendence External Clock Drivers (SLVA755), for more information regarding interfacing an

external clock to TPS54618-Q1 family of devices.

The regulated output voltage at no load is given by Equation 1:

Vout = Vin × tON × fSW

where

•

Vin = input voltage

•

Vout = output voltage

•

tON = ON time

and

•

fSW = switching frequency

(1)

For given input and output voltages, as switching frequency is increased, tON will reduce. If tON falls below

the minimum value allowed by the internal circuit design, the output voltage may not track the internal 0.8-

V reference and would therefore not be regulated. To maintain the regulation at higher switching

frequencies, tON must be kept above a minimum value. If the switching frequency is less than or equal to

the data sheet maximum value of 2 MHz, tON will always be above designed minimum value and the

output would be regulated.

2.35-MHz Operation

Bench test and chip-level simulations were done to check whether the TPS54618-Q1 can remain in

regulation while switching at a frequency higher than 2.0 MHz.

The test conditions for the bench test and chip-level simulation were as follows:

•

Supply input voltage: 5.33 V

•

Regulated output voltage: 1.35 V

•

Operating switching frequency in bench setup: 2.35 MHz synchronized to an external clock as shown

in Figure 1.

Under these test conditions, the on time at a 100-mA load for the TPS54618-Q1 to maintain regulation

was verified by bench measurements to be 109.6 ns, compared to the value estimated by Equation 2:

(1.35 V / 5.33 V) × (1 / 2.35 MHz) = 107.8 ns

(2)

Minimum controllable on time at higher frequency and input voltage is verified to be less than 90 ns,

confirmed by the simulations in Section 3.

2.5-MHz Operation Simulation Results

A full chip breaking-point simulation is performed at 2.5-MHz clock frequency using the input and output

voltages specified in the following list to determine the minimum controllable tON allowed by internal circuit

design. The 2.5-MHz clock frequency is chosen to have some margin for oscillator tolerances and to be

sure that it works for 2.35-MHz clock frequency.

•

Input voltage swept from 5 V to 6 V

•

Output voltage programmed to 1.35 V

•

Load current set to 10 mA using a 135-Ω resistor

•

LOUT = 0.33 µH, COUT = 33 µF

•

RCOMP = 3.83 kΩ, CZERO = 1.5 nF, CPOLE = 0 pF

Simulation results:

•

Transient turn on behavior appears normal

Contact Us

Shenzhen Nanbeihang Electronic Development Co., Ltd: Contact namesiqi
Chat Now; Phone86-88377872-13714705290; AddressHuali building, Shenzhen, Guangdong

*Email
Please enter Your valid email address.
*To

siqi
*Message
Your inquiry content must be between 20 to 5000 characters.
Please enter a correct verification code.

Product Categories

Integrated circuit

power chip

Connector

TPS54618QRTERQ1 Switch Regulator TI Original From Stock

You May Like

Product Details

Product Description

Contact Us

Product Categories

New Products

Popular Searches

Recommended Products

Find Similar Products By Category

Product Tags: