Datasheet Texas Instruments LM1771UMM/NOPB — 数据表

具有精密使能且无外部补偿的低压同步降压控制器8-VSSOP

数据表

PDF, 1.3 Mb, 修订版: D, 档案已发布: Jan 8, 2016

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Lifecycle Status	Active (Recommended for new designs)
Manufacture's Sample Availability	Yes

Control Mode	Constant on-time (COT)
Duty Cycle(Max)	98 %
Iout(Max)	6 A
Iq(Typ)	0.4 mA
Number of Phases	1
Operating Temperature Range	-40 to 125 C
Package Group	VSSOP
Rating	Catalog
Regulated Outputs	1
Special Features	Enable
Switching Frequency(Max)	2000 kHz
Switching Frequency(Min)	500 kHz
Type	Controller
Vin(Max)	5.5 V
Vin(Min)	2.8 V
Vout(Max)	4.5 V
Vout(Min)	0.8 V

RoHS

Compliant

Evaluation Modules & Boards: LM1771EVAL
Low-Voltage Synchronous Buck Controller with Precision Enable and No External Compensation
Lifecycle Status: Active (Recommended for new designs)
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LM1771 and LM3880 Based FPGA Power Supply Reference Design (Rev. A)
PDF, 103 Kb, 修订版: A, 档案已发布: May 5, 2013
This application note discusses the Virtex-5 FPGA power supply prerequisites in terms of the multiplevoltage rail and current level requirements, output sequencing, and startup characteristics.
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Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A)
PDF, 178 Kb, 修订版: A, 档案已发布: Apr 23, 2013
Of all the voltage regulator control strategies ever devised, the hysteretic regulator is probably about thesimplest. This control methodology simply turns a switch on when the output voltage is below a referenceand turns the switch off when the output rises to a slightly higher reference. The output ripple is thereforea direct function of the difference between the upper and lower reference

系列: LM1771 (6)

Semiconductors > Power Management > Non-isolated DC/DC Switching Regulator > Step-Down (Buck) > Buck Controller (External Switch)