LM2727

更新时间： 2024-11-25 12:33:11

品牌	Logo	应用领域
德州仪器 - TI		稳压器控制器
页数	文件大小	规格书
31页	1294K
描述
LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller

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LM2727 数据手册

LM2727, LM2737

www.ti.com

SNVS205D –AUGUST 2002–REVISED MARCH 2013

LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output

Voltages

Check for Samples: LM2727, LM2737

FEATURES

DESCRIPTION

The LM2727 and LM2737 are high-speed,

synchronous, switching regulator controllers. They

are intended to control currents of 0.7A to 20A with

up to 95% conversion efficiencies. The LM2727

employs output over-voltage and under-voltage latch-

off. For applications where latch-off is not desired, the

LM2737 can be used. Power up and down

sequencing is achieved with the power-good flag,

adjustable soft-start and output enable features. The

LM2737 and LM2737 operate from a low-current 5V

bias and can convert from a 2.2V to 16V power rail.

Both parts utilize a fixed-frequency, voltage-mode,

PWM control architecture and the switching

frequency is adjustable from 50kHz to 2MHz by

adjusting the value of an external resistor. Current

limit is achieved by monitoring the voltage drop

across the on-resistance of the low-side MOSFET,

which enhances low duty-cycle operation. The wide

range of operating frequencies gives the power

supply designer the flexibility to fine-tune component

size, cost, noise and efficiency. The adaptive, non-

overlapping MOSFET gate-drivers and high-side

bootstrap structure helps to further maximize

efficiency. The high-side power FET drain voltage can

be from 2.2V to 16V and the output voltage is

adjustable down to 0.6V.

•

Input Power from 2.2V to 16V

•

Output Voltage Adjustable Down to 0.6V

Power Good flag, Adjustable Soft-Start and

Output Enable for Easy Power Sequencing

•

Output Over-Voltage and Under-Voltage Latch-

Off (LM2727)

Output Over-Voltage and Under-Voltage Flag

(LM2737)

•

Reference Accuracy: 1.5% (0°C - 125°C)

Current Limit Without Sense Resistor

Soft Start

Switching Frequency from 50 kHz to 2 MHz

TSSOP-14 Package

APPLICATIONS

•

Cable Modems

Set-Top Boxes/ Home Gateways

DDR Core Power

High-Efficiency Distributed Power

Local Regulation of Core Power

Typical Application

+5V

V_IN= 3.3V

C_BOOT

0.1m

R_IN

C_IN1,2

Si4884DY

10W

10mF

6.3V

V_CC

1.5 mH

6.1 A, 9.6 mW

C_IN

2.2mF

BOOT

R_CS

V_O= 1.2V@5A

I_SEN

PWGD

FREQ

R_FADJ

Si4884DY

2.2k

LM27x7

PGND

C_O1,2

63.4k

C_SS

12n

R_FB2

10k

2200mF

6.3V, 2.8A

SGND

EAO

R_FB1

C_C1

10k

R_C1

392k

C_C2

180p

2.2p

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...31

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LM2727 替代型号

型号	品牌	替代类型	描述	数据表
LM2745	TI	功能相似	LM2745 / LM2748 Synchronous Buck Controller with Pre-Bias Startup, and Optional Clock
LM2743	TI	功能相似	LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller
LM2737	TI	功能相似	LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output

与LM2727相关器件

型号	品牌	获取价格	描述	数据表
LM2727_16	TI	获取价格	LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
LM2727MTC	TI	获取价格	LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output
LM2727MTC/NOPB	TI	获取价格	2.2 - 16V input, 2MHz, N-Channel FET synchronous buck controller w output over V &
LM2727MTC/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, TSSOP-14, Switching
LM2727MTCX	TI	获取价格	LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output
LM2727MTCX/NOPB	NSC	获取价格	IC SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO14, PLASTIC, TSSOP-14, Switching
LM2727MTCX/NOPB	TI	获取价格	LM2727/LM2737 N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
LM272D	STMICROELECTRONICS	获取价格	DUAL POWER OPERATIONAL AMPLIFIER
LM272M	STMICROELECTRONICS	获取价格	DUAL POWER OPERATIONAL AMPLIFIER
LM27-2PLMDA	NSC	获取价格	【3∑C Accurate, 120∑C-150∑C Factory Preset The

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