LTC2974 datasheet(14/36 Pages) LINER

部件名	LTC2974

功能描述	Quad DC/DC 關Module Regulator with Configurable 4A Output Array

Download	36 Pages

Scroll/Zoom	100%

制造商	LINER [Linear Technology]

网页	http://www.linear.com

标志

14 / 36 page

LTM4644/LTM4644-1

14

4644fe

For more information www.linear.com/LTM4644

APPLICATIONS INFORMATION

4644 F05

CH1

CSS

0.1µF

RFB1

13.3k

VIN

4V TO 14V

RTR(TOP)2

60.4k

CH2

RFB(SL)2

19.1k

CH3

RFB(SL)3

30.1k

CH4

RFB(SL)4

60.4k

RTR(BOT)2

13.3k

RTR(TOP)3

60.4k

RTR(BOT)3

13.3k

RTR(TOP)4

60.4k

RTR(BOT)4

13.3k

60.4k

4644 F04

TIME

VOUT4 = 1.2V

VOUT3 = 1.8V

VOUT2 = 2.5V

VOUT1 = 3.3V

Figure 4. Output Ratiometric Tracking Waveform

Figure 5. Output Ratiometric Tracking Schematic

Forexample,VOUT(MA)=3.3V,MR=3.3V/24msandVOUT(SL)

= 1.2V, SR = 1.2V/24ms as VOUT1 and VOUT4 shown in

Figure 5. From the equation, we could solve out that

RTR4(TOP) = 60.4k and RTR4(BOT) = 13.3k is a good com-

bination. Follow the same equation, we can get the same

RTR(TOP)/RTR(BOT) resistor divider value for VOUT2 and

VOUT3.

The TRACK pins will have the 2.5µA current source on

when a resistive divider is used to implement tracking on

that specific channel. This will impose an offset on the

TRACK pin input. Smaller value resistors with the same

ratios as the resistor values calculated from the above

equation can be used. For example, where the 60.4k is

used then a 6.04k can be used to reduce the TRACK pin

offset to a negligible value.

The coincident output tracking can be recognized as a

special ratiometric output tracking which the master’s

output slew rate (MR) is the same as the slave’s output

slew rate (SR), as waveform shown in Figure 6.

From the equation we could easily find out that, in the

coincident tracking, the slave regulator’s TRACK/SS pin

resistor divider is always the same as its output voltage

divider.

RFB(SL)

RFB(SL) +60.4k

=

RTR(BOT)

RTR(TOP) +RTR(BOT)

类似零件编号 - LTC2974

制造商	部件名	数据表	功能描述
Linear Technology	LTC2974	1Mb / 32P	Wide Range I2C Power Monitor Rail-to-Rail Input Range: 0V to 80V
Analog Devices	LTC2974	6Mb / 138P	30V to 58V Input, Dual 30A, Single 60A 關Module Regulator with Digital Power System Management Rev. 0
Linear Technology	LTC2974	469Kb / 28P	de36VIN, 5A 關Module Regulator with 5-Output Configurable LDO Array
Analog Devices	LTC2974	1Mb / 92P	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement Rev. F
Linear Technology	LTC2974	327Kb / 22P	Inverting or SEPIC 關Module DC/DC Converter with up to 700mA Output Current

More results

类似说明 - LTC2974

制造商	部件名	数据表	功能描述
Linear Technology	LTM4644	527Kb / 32P	Quad DC/DC Module Regulator with Configurable 4A Output Array
Linear Technology	LTM4643EV	954Kb / 8P	Quad DC/DC 關Module Regulator with Configurable 3A Output Array
Analog Devices	LTM4671	1Mb / 36P	Quad DC/DC 關Module Regulator with Configurable Dual 12A, Dual 5A Output Array Rev. B
Linear Technology	LTM4643	567Kb / 32P	Ultrathin Quad 關Module Regulator with Configurable 3A Output Array
Analog Devices	LTM8051	2Mb / 28P	Quad 40VIN Silent Switcher 關Module Regulator with Configurable 1.2A Output Array
Analog Devices	LTM8060	2Mb / 28P	Quad 40VIN, Silent Switcher 關Module Regulator with Configurable 3A Output Array
Linear Technology	LTM4619	300Kb / 24P	Dual, 26VIN, 4A DC/DC 關Module Regulator
	LTM4624	347Kb / 26P	14VIN, 4A Step-Down DC/DC 關Module Regulator
	LTM4644EY	436Kb / 6P	Quad 4A Output Step-Down 關Module Regulator
Monolithic Power System...	MPM54504	1Mb / 20P	16V, Quad DC/DC Power Module with 5A Output Array Rev. 1.0 3/19/2021