Datasheet Texas Instruments LM1770UMF/NOPB

Low-Voltage SOT23 Synchronous Buck Controller With No External Compensation 5-SOT-23 -40 to 125

Datasheets

PDF, 862 Kb, Revision: C, File published: Apr 3, 2013

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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)	4 A
Iq(Typ)	0.4 mA
Number of Phases	1
Operating Temperature Range	-40 to 125 C
Package Group	SOT-23
Rating	Catalog
Regulated Outputs	1
Special Features	Light Load Efficiency
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

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Evaluation Modules & Boards: LM1770EVAL
Low-Voltage SOT23 Synchronous Buck Controller With No External Compensation
Lifecycle Status: Active (Recommended for new designs)
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AN-1414 LM1770 Design Reference (Rev. A)
PDF, 226 Kb, Revision: A, File published: Apr 23, 2013
This application report presents several reference designs that can be used to implement the TexasInstruments LM1770 Synchronous Buck Controller in a wide variety of configurations.
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Advanced Topics in Powering FPGAs
PDF, 645 Kb, File published: Mar 22, 2007
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Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A)
PDF, 178 Kb, Revision: A, File published: 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

Series: LM1770 (5)

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