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Richtek Wide Input Voltage Range DC/DC Power Solutions for Industrial, Automotive and LED lighting applications



Introduction

Richtek provides comprehensive power conversion solutions for input voltages ranging from 1.4V up to 80V, suitable for a wide range of applications in the industrial, automotive, and professional lighting field.

The selected product range in this brochure highlights Richtek linear and switching converters, from low quiescent LDOs to highly efficient step-up and step down converters and controllers, LED lighting drivers, Power Switches and DDR terminators.

· Many parts come with extra features such as PGOOD signaling and programmable Soft-Start.

· Richtek Buck converters use robust control architectures like ACOT™ which is compensation free and simple to use.

· The listed parts have thermally enhanced packages, allowing higher ambient temperature operation.

· Richtek also offers both 3T parts (qualified over the full -40°C ~ 85°C industrial temperature range) and Automotive AEC-Q100 qualified parts.

· All parts can be used with ceramic input and output capacitors which extends operation life time.

These features make the Richtek parts extremely suitable for demanding applications fields such as:

描述: D:\Task file\03.eNews\10-Issue 10\Icons\Icon_Industrial.jpg

描述: D:\Task file\03.eNews\10-Issue 10\Icons\Icon_Car.jpg

描述: D:\Task file\03.eNews\10-Issue 10\Icons\Icon_Communication.jpg

描述: D:\Task file\03.eNews\10-Issue 10\01-Pictures\Icons\新增資料夾\Icon_LED_Lighting-2.jpg.png

Industrial

 · eMetering

 · Embedded Computing

 · Industrial control systems

 · Portable equipment

 · Instrumentation

 · Surveillance Cameras

Automotive

           · Infotainment

           · USB power

Communications

          · Networking

          · Servers

          · Data storage

Professional LED Lighting

           · Car lighting

           · Street Lighting

           · Display lighting

           · Lighting controls



Power conversion IC Portfolio for Industrial, Automotive and LED lighting applications

Technical Document Image Preview



Step down converters and LDOs


1.4V~6V VIN, up to 4A, Buck converters/LDOs

Ideal for Li-ion battery powered applications, 5V input power rails and intermediate power conversions.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT2657BQ

Synchronous

Buck converter

0.6A

2.7V~5.5V

0.6V~5.5V

2.25MHz

· AEC-Q100 Compliance

· Built-in Soft-Start

· 1.5A Current limit peak

WDFN-8L 3x3

RT5712A

2A

2.7V~5.5V

0.6V~3.4V

1MHz

· RON 100mΩ HS / 70mΩ LS

· 1.2ms fixed Soft-Start

· CMCOT topology: good transient response, stable with MLCC

· Hiccup or Latch off UVP

WDFN-6L-2x2

RT8079

3A

2.95V~6V

VREF: 0.827V

300kHz~2MHz

· RON 45mΩ HS / 45mΩ LS

· Power Good

· Adjustable Soft-Start

WQFN-16L-3x3

RT8086B

3.5A

2.8V~5.5V

0.6V~3.3V

1.2MHz

· RON 50mΩ HS / 40mΩ LS

· CMCOT topology: good transient response, stable with MLCC

· Power Good

· Built-in Soft-Start

· Hiccup UVP

UQFN-12L-2x2 (FC)

RT8074

4A

2.7V~5.5V

0.8V~5V

200kHz~2MHz

· Built-in Soft-Start

PSOP-8

P/N

Description

IOUT

VIN

VOUT

VDropout

Key Features

Package

RT2517B

LDO

1A

2.2V~6V

1.2V~VIN

200mV@1A

· AEC-Q100 Compliance

· Low Quiescent 1.5µA in Shutdown Mode

PSOP-8

RT2517C

1A

2.2V~6V

1.2V~VIN

150mV@1A

· 3T Grade

· Low Quiescent 0.1µA in Shutdown Mode

VDFN-8AL-3x3

RT2518

LDO with EN

1A

1.4V~6V

0.5V~VIN

200mV@1A

· 3T Grade

· EN control

WDFN-8L-3x3

RT2515H

2A

1.4V~6V

0.5V~VIN

400mV@2A

· 3T Grade

· EN control

PSOP-8



4V~18V VIN, up to 6A Buck converters

Ideal for applications powered from 5V~12V power rails, intermediate power conversions, etc.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT8297B

Current Mode Synchronous Buck converter

1.5A

4V~17V

0.8V~12V

800kHz

· Power Good

WDFN-8L-2x2

RT6232/33/A/B

A:PSM

B:PWM

ACOT™ Synchronous

Buck converter

2A/3A

4.5V~18V

0.765V~8V

500kHz

· ACOT™ topology for ultra-fast transient response and MLCC COUT stable

· Adjustable Soft-Start

· Power Good

· Force PWM or PSM (enhanced light load efficiency)

WDFN-8L-2x3

RT7275/76

75:PWM

76:PSM

3A

700kHz

WDFN-10L-3x3

PTSSOP-14

RT7231/32

31:PWM

32:PSM

4A

650kHz

WDFN-10L-3x3

PTSSOP-14

RT6206B

PSM

5.5A

650kHz

WDFN-10L-3x3

PSOP-8

RT2859A/B

A:PSM

B:PWM

ACOT™ Synchronous

Buck converter

3A

4.5V~18V

0.765V~7V

650kHz

· 3T Grade

· ACOT™ topology for ultra-fast transient response and MLCC COUT stable

· Adjustable Soft-Start

· Power Good

· Hiccup or Latch off UVP

WDFN-16L-3x3

RT2855A/B

A:PSM

B:PWM

4A

650kHz

WDFN-16L-3x3

RT2856

Current Mode Synchronous Buck converter

6A

4.5V~18V

VREF: 0.8V

200kHz~1.6MHz

· 3T Grade

· RON 26mΩ HS / 19mΩ LS

· Adjustable Soft-Start

· Power Good

· VREF:0.8V ±1% over -40°C ~ 85°C

WQFN-14AL-3.5x3.5



3V~24V VIN, up to 8A Buck converters

Ideal for applications powered from 12V system power rails requiring extra input voltage de-rating

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT7262/63/64

Current Mode Synchronous Buck converter

2A/3A/4A

4.5V~21V

0.808V~15V

500kHz

· Synchronized external clock from 300kHz~2MHz

· Adjustable Soft-Start

· Low LS RON ideal for low VOUT

WDFN-14L-4x3

PSOP-8

RT8299

3A

3V~24V

0.8V~15V

500kHz

· Power Good and very wide VIN range

WDFN-10L-3x3

PSOP-8

RT6220

ACOT™ Synchronous

Buck converter

6A

4.5V~23V

0.6V~5V

500kHz

· ACOT™ topology for ultra-fast transient response and MLCC COUT stable

· RON 31mΩ HS / 20mΩ LS

· Power Good

UQFN-16L-3x3(FC)

RT7238

ACOT™ Synchronous

Buck converterwith 3.3V/5V LDO

8A

8V~23V

0.9V~5V Adj.

3.35V fixed

5.0V fixed

500kHz

· ACOT™ topology for ultra-fast transient response and MLCC COUT stable

· RON 27mΩ HS / 10mΩ LS

· With fixed 70mA 3.3V/5V LDO

UQFN-10L-3x3(FC)

Also see:

Application note ‘’Buck converter selection criteria’’

Application note "Comparing Buck converter topologies–Current mode, CMCOT™ and ACOT™"



3.5V~36V VIN, up to 0.6A Buck converters/ low quiescent LDOs

Ideal for applications from 24V rails, for powering low power MCUs in e-metering, lighting controls, sensors, etc.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT6208

Buck converter

0.1A

4.5V~36V

Adj.VOUT

VREF = 0.8V

Hysteretic mode operation using Boundary conduction mode

· Synchronous

· Adjustable current limit

· 25µA IQ

· Very high efficiency at low load

SOT-23-6

PSOP-8(w/PG)

SOT-23-8(w/PG)

RT6200

0.6A

4.5V~36V

0.8V~15V± 2%

1.2MHz

· Asynchronous with internal 0.3Ω HS MOSFET

SOT-23-6

P/N

Description

IOUT

VIN

VOUT

VDropout

Key Features

Package

RT9058

RT2560Q

LDO

100mA

3.5V~36V

2.5V,3.3V,5V,12V fixed

550mV@10mA

· AEC-Q100 Grade(RT2560Q)

· 2µA ultra low IQ

SOT-23-3

SOT-89

PSOP-8

Application note “How to power small MCU’s from industrial supply rails

Technical Document Image Preview



4.5V~36V VIN, up to 5A Buck converters

Ideal for applications from 24V power rails, such as USB supply, displays, medium power MCUs, Instrumentation, etc.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT7272A
RT7272B

(PWM/PSM)

Current Mode

Buck converter

3A

4.5V~36V

0.8V~30V

500kHz

· Adjustable current limit: 2.5A~5.5A

· Integrated 150/80mΩ HS/LS MOSFET

PSOP-8

RT2872

3A

4.5V~36V

0.8V~30V

300kHz~1MHz

· AEC-Q100 Grade 3

· 105/80mΩ HS/LS MOSFET

· Ext.compensation

PSOP-8

RT2875A/B

(latch UV/hiccup UV)

3A

4.5V~36V

0.6V~24V

300kHz~2.1MHz

· AEC-Q100 Grade 2

· 95/70mΩ HS/LS MOSFET

· Ext.compensation

· Adjustable current limit:1.5A~6A

PTSSOP-14

RT8289

RT8279

5A

peak

5.5V~32V

5.5V~36V

1.222V~26V

500kHz

· Asynchronous with integrated 100mΩ HS MOSFET

· Internal compensation & Soft-Start

PSOP-8

RT2805A

5A

peak

5.5V~36V

1.222V~26V

500kHz

· 3T Grade

· Asynchronous with integrated 110mΩ HS MOSFET

· Internal compensation & Soft-Start

PSOP-8

Technical Document Image Preview



4.5V~80V VIN, up to 230mA. High voltage LDOs

Ideal for applications from highly fluctuating power rails (±60/±80V) such as automotive battery powered applications, for powering sensors, low power MCUs, etc.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

VDropout

Key Features

Package

RT2571

LDO

50mA

4.5V~60V

2.5V,3.3V,5V Fixed

1.25-60V Adj.

250mV@50mA

· 30µA low IQ

· -60V reverse protection

PSOP-8, PMSOP-8,
SOT-223

RT9074

100mA

4.5V~60V

2.5V,3.3V,5V Fixed

1.25-60V Adj.

300mV@100mA

· 30µA low IQ

· -60V reverse protection

PSOP-8, PMSOP-8,
SOT-223

RT9068

230mA

4.5V~60V

2.5V,3.3V,5V fixed

1.25V~60V Adj.

230mV@50mA

· 30µA low IQ

· -60V reverse protection

PSOP-8, PMSOP-8,
SOT-223

RT9072A/B

20mA

4.5V~80V

1.25V~60V Adj.

180mV@20mA

· 23µA low IQ

· -80V reverse protection

SOT-23-5,
WDFN-8L 3x3

Technical Document Image Preview



Step up controller for high power Boost applications


4.5V~29V VIN, Boost controller

Ideal for applications in high boost power, such as 24V to 48V conversion, large display backlighting, thermal printers, battery pack charging, etc.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VOUT

fSW

Key Features

Package

RT8525

Boost controller

Limited by ext.MOSFET

4.5V~29V

Limited by MOSFET

50K-600kHz

· Programmable Soft-Start Time

· Programmable Boost SW Frequency

· Fault signaling pin

SOP-14

Technical Document Image Preview



LED Drivers


4.5V~50V VIN, Constant Current Buck converters

Ideal for medium power industrial LED lighting applications.

Technical Document Image Preview

P/N

Description

IOUT

VIN

Key Features

Where to use, (application examples)

Package

RT8471

Hysteretic control, high brightness LED driver

1/1.2A

7V~36V

· Simple application: no COUT needed

· Analog or digital dimming control

· Ultra-fast response

· Colour control for single string

· LED strips, signage, < 15W

· MR-16 ≤ 4WSingle string buck with color control via LED shunt dimming

TSOT-23-5

PMSOP-8

PSOP-8

RT8474
RT8474A

(A:OVP for hot swap function)

50V high voltage LED driver

2A

4.5V~50V

· Analog or digital dimming control

· Low RON

· LED strips, signage, LED engines, POUT< 30W

· RT8474A with special open string protection is ideal for hot-swap LED string

PSOP-8

Technical Document Image Preview



4.5V~150V VIN, Constant Current Buck / Boost / Buck-Boost controllers

Ideal for industrial/automotive LED lighting applications, such as high power LED string applications, street lighting, display backlight.

Technical Document Image Preview

P/N

Description

IOUT

VIN

VLED

Key Features

Where to use

Package

RT8477A

Buck / Boost controller

Limited by external MOSFET

4.5V~50V

up to 50V

· low component count

· Analog or PWM Dimming control

· Wide input / output range with medium power: LED modules, down-light, emergency lighting

· Buck ≤ 60W, Boost ≤ 40W

PSOP-8

RT8475/
RT8494

LED Driver Controller for Buck, Boost or Buck-Boost Topology

4.5V~36V

(IC VIN)

up to 90V

· Programmable FSW 100kHzto 1MHz

· Analog or Digital to Analog Dimming control

· Industrial Display Backlight

· AEC-Q100 Compliance (RT8494)

SOP-14,

WQFN-16L 3x3

RT8485

LED Driver controller for

Buck/Boost/Buck-Boost topologies

4.5V~36V

(IC VIN)

up to 150V

· Programmable switching frequency

· Analog, Digital or Digital to Analog Dimming control

· Street lighting

· High power, high LED string application

· Buck ≤ 100W, Boost ≤ 80W

SOP-14

Technical Document Image Preview



Power Switch and DDR termination regulator

P/N

Description

IOUT

VIN

Key Features

Package

RT2528

Power Switch with adj.ILIM

0.5A~2.5A

2.5V~5.5V

· AEC-Q100 Grade 3

· Adjustable current limit: 0.5A~2.5A via an ext. resistance

· 120mΩ P-MOSFET

· Built-in Soft-Start

· Low supply current:120µA

· Reverse input-out voltage

PSOP-8

RT2526Q

DDR Termination regulator

DDRII/III:2A

VIN:3.1V~3.6V

VLDOIN:1.2V~1.8V

· 3T Grade

· S3, S5 off modes

· MLCC stable

· Remote sense

PSOP-8


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