LM5085-Q1

Name: LM5085-Q1
Brand: TI
SKU: LM5085-Q1
Price: 1.136 USD

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Nicht synchroner PFET-Abwärtsregler, Automotive Grade, großer Vin-Bereich 4,5–75 V, mit konstanter E

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Datenblatt

document-pdfAcrobat LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller datasheet (Rev. I) (Englisch) PDF | HTML

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Alternativen vergleichen

Gleiche Funktionalität, andere Pinbelegung als verglichener Baustein

LM5141-Q1

AKTIV

Synchroner Abwärtscontroller mit breitem Eingangsspannungsbereich für die Automobilindustrie, 2,2 MH Optional spread spectrum for improved EMI.

LM5085-Q1

AKTIV

Datenblatt

Jetzt bestellen

Produktdetails

Vin (min) (V)

4.5

Vin (max) (V)

75

Iout (max) (A)

10

Operating temperature range (°C)

-40 to 125

Control mode

Constant on-time (COT)

Rating

Automotive

Vout (min) (V)

1.25

Vout (max) (V)

75

Iq (typ) (A)

0.0013

Duty cycle (max) (%)

100

Number of phases

1

Vin (min) (V)

4.5

Vin (max) (V)

75

Iout (max) (A)

10

Operating temperature range (°C)

-40 to 125

Control mode

Constant on-time (COT)

Rating

Automotive

Vout (min) (V)

1.25

Vout (max) (V)

75

Iq (typ) (A)

0.0013

Duty cycle (max) (%)

100

Number of phases

1

HVSSOP (DGN)

8

14.7 mm² 3 x 4.9

LM5085-Q1 is an Automotive Grade Product that
is AEC-Q100 Grade 1 Qualified (–40°C to 125°C
Operating Junction Temperature)
Wide 4.5-V to 75-V Input Voltage Range
Adjustable Current Limit Using R_DS(ON) or a
Current Sense Resistor
Programmable Switching Frequency to 1MHz
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency with Line
and Load Variations
Adjustable Output Voltage from 1.25 V
Precision ±2% Feedback Reference
Capable of 100% Duty Cycle Operation
Internal Soft-start Timer
Integrated High Voltage Bias Regulator
Thermal Shutdown
Package:
- HVSSOP-8
- VSSOP-8
- WSON-8

LM5085-Q1 is an Automotive Grade Product that
is AEC-Q100 Grade 1 Qualified (–40°C to 125°C
Operating Junction Temperature)
Wide 4.5-V to 75-V Input Voltage Range
Adjustable Current Limit Using R_DS(ON) or a
Current Sense Resistor
Programmable Switching Frequency to 1MHz
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency with Line
and Load Variations
Adjustable Output Voltage from 1.25 V
Precision ±2% Feedback Reference
Capable of 100% Duty Cycle Operation
Internal Soft-start Timer
Integrated High Voltage Bias Regulator
Thermal Shutdown
Package:
- HVSSOP-8
- VSSOP-8
- WSON-8

The LM5085 is a high efficiency PFET switching regulator controller that can be used to quickly and easily develop a small, efficient buck regulator for a wide range of applications. This high voltage controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide 4.5-V to 75-V input range. The constant on-time regulation principle requires no loop compensation, simplifies circuit implementation, and results in ultrafast load transient response. The operating frequency remains nearly constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The PFET architecture allows 100% duty cycle operation for a low dropout voltage. Either the R_DS(ON) of the PFET or an external sense resistor can be used to sense current for over-current detection.

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Technische Dokumentation

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Alle anzeigen 4

	Typ	Titel		Datum
*	Data sheet	LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller datasheet (Rev. I)	PDF \| HTML	12 Aug 2015
	EVM User's guide	AN-1878 LM5085 Evaluation Board (Rev. B)		30 Apr 2013
	Application note	Constant Current Constant Voltage Buck Converter w/LM25085 (Rev. A)		23 Apr 2013
	Application note	Designing Non-Invert Buck-Boost (Zeta) Cnvrts w/a Buck P-FET Cntrl		22 Apr 2011

Design und Entwicklung

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Evaluierungsplatine

LM5085EVAL — LM5085 – PFET-Abwärts-Schaltregler mit konstanter Einschaltdauer bei 75 V und großem Vin

The LM5085 evaluation board provides the design engineer with a fully functional buck regulator, employing the LM5085 PFET switching controller which uses the constant on-time (COT) operating principle. The evaluation board provides a 5V output over an input range of 5.5V to 55V. The circuit (...)

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