Richtek RT9014A-CSPQW, RT9014A-FMPQW, RT9014A-FPPQW, RT9014A-GKPQW, RT9014A-GPPQW Schematic [ru]

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4 (1)

Preliminary

RT9014/A

Ultra Low Noise 300mA Dual LDO Regulator with POR, NMOS Driver and Requiring No Bypass Capacitor

General Description

Features

RT9014/A is a dual channel, low noise, and low dropout with the sourcing ability up to 300mA, an open drain driver and power-on reset function. The open-drain output is capable of sinking 150mA for LED backlighting applications.

The range of output voltage is from 1.2V to 3.6V by operating from 2.5V to 5.5V input.

RT9014/A offers 2% accuracy, extremely low dropout voltage (240mV @ 300mA), and extremely low ground current, only 27μA per LDO. The shutdown current is near zero current which is suitable for battery-power devices. Other features include current limiting, over temperature, output short circuit protection.

RT9014/A is short circuit thermal folded back protected. RT9014/A lowers its OTP trip point from 165°C to 110°C when output short circuit occurs (VOUT < 0.4V) providing maximum safety to end users.

RT9014/A can operate stably with very small ceramic output capacitors, reducing required board space and component cost. RT9014/A is available in fixed output voltages in the WDFN-10L 3x3 package.

Ordering Information

RT9014/A-

Package Type

QW : WDFN-10L 3x3 (W-Type)

Operating Temperature Range

P : Pb Free with Commercial Standard

Output Voltage : VOUT1/VOUT2 FM : 1.50V/2.80V, FP : 1.50V/3.00V GK : 1.80V/2.60V, GM : 1.80V/2.80V GP : 1.80V/3.00V, JG : 2.50V/1.80V JM : 2.50V/2.80V, JP : 2.50V/3.00V JN : 2.50V/2.85V, PP : 3.00V/3.00V

zWide Operating Voltage Ranges : 2.5V to 5.5V

zLow-Noise for RF Application

zNo Noise Bypass Capacitor Required

zFast Response in Line/Load Transient

zTTL-Logic-Controlled Shutdown Input

zLow Temperature Coefficient

zDual LDO Outputs (300mA/300mA)

z1 Open-Drain Driver

zUltra-low Quiescent Current 27μA/LDO

zHigh Output Accuracy 2%

zShort Circuit Protection

zThermal Shutdown Protection

zCurrent Limit Protection

zShort Circuit Thermal Folded Back Protection

zTiny 10-Lead WDFN Package

zRoHS Compliant and 100% Lead (Pb)-Free

Applications

zCDMA/GSM Cellular Handsets

zBattery-Powered Equipment

zLaptop, Palmtops, Notebook Computers

zHand-Held Instruments

zPCMCIA Cards

zPortable Information Appliances

Pin Configurations

(TOP VIEW)

VIN

1

 

10

VOUT1

VIN

1

 

10

VOUT1

EN

2

GND

9

VOUT2

EN1

2

GND

9

VOUT2

NC 3

8

POR

EN2 3

8

POR

SW 4

 

7

DRV

SW 4

 

7

DRV

SET

5

 

9

GND

SET

5

 

9

GND

EN Function Independent

EN Function Dependent

Note :

RichTek Pb-free products are :

`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes. `100% matte tin (Sn) plating.

RT9014

RT9014A

WDFN-10L 3x3

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.

DS9014/A-02 May 2006

www.richtek.com

 

1

RT9014/A

 

 

 

 

Preliminary

 

 

 

 

 

 

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

100K

 

 

 

 

 

 

100K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIN

VIN

 

POR

 

 

V

 

VIN

 

POR

 

 

CIN

 

 

 

 

 

IN

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

1uF Chip Enable

 

 

 

 

IN

Chip Enable EN1

 

 

 

 

 

DRV

 

 

1uF

 

DRV

 

 

 

EN

RT9014

 

 

RT9014A

 

 

 

 

 

VOUT1

 

 

 

 

 

 

 

 

VOUT1

 

 

 

EN2

 

 

V

DRV Enable

 

COUT1

DRV Enable

 

VOUT1

C

 

 

 

 

 

 

 

 

OUT1

 

SW

 

 

1uF

 

 

 

SW

 

 

OUT1

 

 

 

 

 

 

 

 

 

1uF

 

100k

 

 

 

 

 

 

 

 

 

 

SET

VOUT2

C

VOUT2

 

100k

SET

VOUT2

 

V

 

 

GND

 

 

 

 

 

 

COUT2

OUT2

 

 

 

OUT2

 

 

 

 

GND

 

 

 

CDELAY

 

 

1uF

 

 

 

CDELAY

 

1uF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Functional Pin Description

Pin No.

Pin

Pin Function

RT9014-□□PQW

RT9014A-□□PQW

Name

1

1

VIN

Supply Input

2

--

EN

Chip Enable (Active High)

--

2

EN1

Chip Enable 1 (Active High)

--

3

EN2

Chip Enable 2 (Active High)

3

--

NC

No Internal Connection Pin.

 

 

 

Active high signal drives open-drain N-Channel MOSFET.

4

4

SW

Note that this pin is high impedance. There should be a pull low

100kΩ resistor connected to GND when the control signal is

 

 

 

 

 

 

floating.

 

 

 

Delay Set Input: Connect external capacitor to GND to set the

5

5

SET

internal delay for the POR output. When left open, there is no

 

 

 

delay. This pin cannot be grounded.

 

 

 

 

6

6

GND

Common Ground

7

7

DRV

Open-Drain Output: Capable of sinking 150mA.

8

8

POR

Power-On Reset Output: Open-drain output. Active low indicates

an output under-voltage condition on regulator 2.

 

 

 

 

 

 

 

9

9

VOUT2

Channel 2 Output Voltage

10

10

VOUT1

Channel 1 Output Voltage

Exposed Pad

Exposed Pad

GND

Exposed pad should be soldered to PCB board and connected to

GND.

 

 

 

 

 

 

 

www.richtek.com

DS9014/A-02 May 2006

2

 

 

 

 

 

Preliminary

 

 

RT9014/A

Available Voltage Version

 

 

 

 

 

 

 

 

Voltage

C

F

W

G

D

Y

H

E

J

K

T

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code

1.2

1.5

1.6

1.8

1.85

1.9

2

2.1

2.5

2.6

2.65

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Voltage

L

M

N

V

P

Q

R

S

--

--

--

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Code

2.7

2.8

2.85

2.9

3

3.1

3.2

3.3

--

--

--

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Function Block Diagram

 

Shutdown

 

VIN

 

and

 

 

 

Logic Control

 

 

VREF

 

 

 

-

MOS Driver

 

 

+

 

 

 

 

 

Error

 

VOUT1

 

Amplifier

Current-Limit

 

 

 

 

 

and

 

 

 

Thermal

 

 

 

Protection

 

 

 

 

GND

EN

Shutdown

 

 

 

 

 

 

and

 

 

 

Logic Control

 

 

VREF

 

 

 

-

MOS Driver

 

 

+

 

 

 

 

 

Error

 

VOUT2

 

Amplifier

Current-Limit

 

 

 

 

 

and

 

 

 

Thermal

 

 

 

Protection

 

 

 

 

GND

SET

 

POR& Delay

POR

 

 

 

 

 

 

DRV

SW

 

SW Logic

 

 

RT9014

 

 

To be continued

DS9014/A-02 May 2006

www.richtek.com

3

Richtek RT9014A-CSPQW, RT9014A-FMPQW, RT9014A-FPPQW, RT9014A-GKPQW, RT9014A-GPPQW Schematic

RT9014/A

Preliminary

 

EN1

Shutdown

 

VIN

 

and

 

 

 

Logic Control

 

 

VREF

 

 

 

-

MOS Driver

 

 

+

 

 

 

 

 

Error

 

VOUT1

 

Amplifier

Current-Limit

 

 

 

 

 

and

 

 

 

Thermal

 

 

 

Protection

 

 

 

 

GND

EN2

Shutdown

 

 

 

 

 

 

and

 

 

 

Logic Control

 

 

VREF

 

 

 

-

MOS Driver

 

 

+

 

 

 

 

 

Error

 

VOUT2

 

Amplifier

Current-Limit

 

 

 

 

 

and

 

 

 

Thermal

 

 

 

Protection

 

 

 

 

GND

SET

 

POR& Delay

POR

 

 

 

 

 

 

DRV

SW

 

SW Logic

 

 

RT9014A

 

 

www.richtek.com

DS9014/A-02 May 2006

4

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