RT8023GQW Richtek USA Inc, RT8023GQW Datasheet

RT8023GQW

Manufacturer Part Number

RT8023GQW

Description

IC CONV STP-DWN W/2 LDO 24WQFN

Manufacturer

Richtek USA Inc

Datasheet

1.RT8023GQW.pdf (19 pages)

Specifications of RT8023GQW

Topology

Step-Down (Buck) Synchronous (1), Linear (LDO) (2)

Function

Any Function

Number Of Outputs

Frequency - Switching

1.2MHz

Voltage/current - Output 1

0.8 V ~ 5 V, 1.5A

Voltage/current - Output 2

0.8 V ~ 5 V, 700mA

Voltage/current - Output 3

0.8 V ~ 5 V, 350mA

W/led Driver

W/supervisor

W/sequencer

Yes

Voltage - Supply

2.4 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

24-WFQFN Exposed Pad

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

RT8023GQW

Manufacturer:

INTERSIL

Quantity:

36 710

Company:

H&T Electronics

Part Number:

RT8023GQW

Quantity:

220

Current page: 1 of 19
Download datasheet (383Kb)

1.2MHz 1.5A Synchronous Step-Down Converter

with Two LDOs

General Description

The RT8023 combines two low dropout (LDO) linear

regulators and a step-down converter with an input voltage

range of 2.6V to 5.5V. Each output voltage is adjustable

from 0.8V to 5V. With independent Enable and Power-

Good pins for each regulator, it is easy to control the power

up sequence, which is important in some applications.

The

delivering up to 700mA(LDO1) and

currents with ultra-low dropout. The LDO has high PSRR

and can work with low-ESR space saving ceramic

capacitors. All these make it Ideal for portable RF and

wireless applications with demanding performance and

space requirements. Other features include high output

accuracy, current limiting protection, and 40μs fast turn-

on time.

The step-down converter is a 1.2MHz PWM, current mode

converter. Its high switching frequency allows the use of

tiny, low cost capacitors and inductors 2mm or less in

height. Internal power switches with low on-resistance

increase efficiency and eliminate the need for external

Schottky diodes. The converter can run at 100% duty cycle

for low dropout operation that extends battery life in

portable systems.

Ordering Information

Note :

Richtek Pb-free and Green products are :

DS8023-02 February 2011

RT8023

RoHS compliant and compatible with the current require-

Suitable for use in SnPb or Pb-free soldering processes.

ments of IPC/JEDEC J-STD-020.

LDO has an independent input and is capable of

Package Type

QW : WQFN-24L 4x4 (W-Type)

Lead Plating System

P : Pb Free

G : Green (Halogen Free and Pb Free)

350mA(LDO2) output

Features

Applications

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area, otherwise visit our website for detail.

Converter Input Voltage Range : 2.6V to 5.5V,

LDO Input Voltage Range : 2.4V to 5.5V

Low-Noise LDO for RF Application

Ultra-Fast Response in Line/Load Transient

LDO Turn-On Time Less Than 40us

Only 1μ μ μ μ μ F LDO Output Capacitor Required for

Stability

Current Limiting Protection

1.5A, High Efficiency Step-Down Converter

1.2MHZ Constant Switching Frequency

Low R

No Schottky Diode Required

0.8V Reference Allows Low Output Voltage

Low Dropout Operation : 100% Duty Cycle

Internally Compensated

< 2μ μ μ μ μ A Shutdown Current

Power Good Output Voltage Monitor

Internal Soft-Start for PWM Converter

Easy Power Sequence Control

Over Temperature Protection

Short Circuit Protection

Thermally Enhanced 24-Lead WQFN Package

RoHS Compliant and 100% Lead (Pb)-Free

Portable Instruments

Microprocessors and DSP Core Supplies

Cellular Phones

Wireless and DSL Modems

PC Cards

Digital Cameras

DS(ON)

Internal Switches

RT8023

www.richtek.com

Related parts for RT8023GQW

RT8023GQW Summary of contents

Page 1

Synchronous Step-Down Converter with Two LDOs General Description The RT8023 combines two low dropout (LDO) linear regulators and a step-down converter with an input voltage range of 2.6V to 5.5V. Each output voltage is adjustable from 0.8V to ...

Page 2

RT8023 Pin Configurations Typical Application Circuit V IN1 C1 10µF PGOOD1 EN1 EN2 EN3 L1 2.2µH V OUT1 1.2V/1.5A R3 100k C5 22uF Figure 1. 1.2V Output Step-Down Converter and Dual 2.5V Output Regulators Note : Must to use ceramic ...

Page 3

Functional Pin Description Pin No. Pin Name 1 PGOOD1 2 VDD1 VIN1 6, PGND 25 (Exposed Pad PHASE1 11 VIN2 12 VOUT2 13 FB2 14 PGOOD2 15 EN2 16 EN3 17 PGOOD3 18 FB3 19 ...

Page 4

RT8023 Function Block Diagram OT POR VDD1 0.8V FB1 0.72V 0.4V EN1 VIN2 EN2 VREF2 FB2 VIN3 EN3 VREF3 FB3 www.richtek.com 4 ISEN OTP Slope Compensation POR OSC Output EA Clamp Internal- Soft Start Control Logic Current Limit 0.8V EA ...

Page 5

Absolute Maximum Ratings Supply Input Voltage, VIN1, VIN2 ---------------------------------------------------------------------------- −0. Output Pin Voltage ---------------------------------------------------------------------------------------------- −0. PHASE Pin Voltage --------------------------------------------------------------------------------------------- −0. Other I/O Pin Voltages ------------------------------------------------------------------------------------------ −0. Power Dissipation ...

Page 6

RT8023 Parameter Output Voltage Load Regulation FB Threshold for PGOOD Transition PGOOD1 Pull-Down Resistance EN1 Input High EN1 Input Low Thermal Shutdown Temperature Thermal Shutdown Hysteresis LDO1 ( 0.5V OUT EN Input Voltage Range Feed ...

Page 7

Parameter Current Limit Dropout Voltage Load Regulation Line Regulation EN3 Pin Current Current Limit Dropout Voltage Load Regulation Line Regulation Power Supply Rejection Ratio 100kHz FB3 Threshold for PGOOD Transition PGOOD3 Pull-Down Resistance EN3 Input High EN3 Input ...

Page 8

RT8023 Typical Operating Characteristics Buck Efficiency vs. Output Current 100 0.1 0.3 0.5 0.7 Output Current (A) Buck Output Voltage vs. Temperature 1.220 1.215 1.210 1.205 1.200 1.195 1.190 1.185 ...

Page 9

Buck Load Transient Response 1.2V IN1 OUT1 1.5A OUT1 V OUT1 (50mV/Div) I OUT1 (1A/Div) Time (50μs/Div) Buck Power On from 3.3V 1.2V, I IN1 OUT1 ...

Page 10

RT8023 LDO1 Current Limit vs. Input Voltage 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 2.5 3 3.5 Input Voltage (V) LDO1 Current Limit vs. Temperature 1.3 1 5.5V 1.1 IN2 1.0 0 3.3V IN2 0.8 ...

Page 11

LDO1 Output Voltage vs. Temperature 2.53 2.52 2.51 2.50 2.49 2.48 2.47 -50 - Temperature LDO1 Load Transient Response 1.2V IN2 OUT2 0.7A OUT2 V OUT2 (20mV/Div) I OUT2 ...

Page 12

RT8023 LDO1 Noise V = 4.5V 1.5V, I IN2 OUT2 V OUT2 (50uV/Div) Time (10ms/Div) LDO1 PSRR 0 -10 -20 -30 -40 - 300mA -60 OUT - 10mA OUT -80 -90 V IN2 -100 ...

Page 13

LDO1 PGOOD Response 1.2V, I IN2 OUT2 V EN2 (5V/Div) V OUT2 (500mV/Div) V PGOOD (2V/Div) I OUT2 (0.5A/Div) Time (25μs/Div) DS8023-02 February 2011 = 0.3A OUT2 V (5V/Div) V OUT3 (500mV/Div) V PGOOD (2V/Div) ...

Page 14

RT8023 Application Information For Buck Converter Part The Typical Application Circuit shows the basic RT8023 application circuit. External component selection is determined by the maximum load current and begins with the selection of the inductor value and operating frequency followed ...

Page 15

The output ripple will be highest at maximum input voltage since ΔI increases with input voltage. Multiple capacitors L placed in parallel may be needed to meet the ESR and RMS current handling requirement. Dry tantalum, special polymer, aluminum electrolytic ...

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RT8023GQW Richtek USA Inc, RT8023GQW Datasheet

RT8023GQW

Specifications of RT8023GQW

Available stocks

Related parts for RT8023GQW

RT8023GQW Summary of contents

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