Richtek RT8010-10GQW, RT8010-10PQV, RT8010-10PQW, RT8010-12GQW, RT8010-12PQV, RT8010-12PQW, RT8010-15GQW, RT8010-15PQV, RT8010-15PQW, RT8010-16PQW, RT8010-18GQW, RT8010-18PQV, RT8010-18PQW, RT8010-25GQW, RT8010-25PQV, RT8010-25PQW, RT8010-33GQW, RT8010-33PQV, RT8010-33PQW, RT8010AGQW, RT8010APQW, RT8010GQW, RT8010PQV, RT8010PQW Schematic [ru]

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®

RT8010/A

1.5MHz, 1A, High Efficiency PWM Step-Down DC/DC Converter

General Description

The RT8010/A is a high efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8010/A is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices.

Two operating modes are available including : PWM/LowDropout autoswitch and shutdown modes. The Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application.

The RT8010/A enters Low Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. RT8010/A enter shut-down mode and consumes less than 0.1μA when EN pin is pulled low.

The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. This along with small WDFN-6L 2x2 and WQFN-16L 3x3 package provides small PCB area application. Other features include soft start, lower internal reference voltage with 2% accuracy, over temperature protection, and over current protection.

Pin Configurations

(TOP VIEW)

IC LX LX LX

 

 

 

 

 

 

16 15

14

13

 

 

 

 

 

 

 

GND

1

 

 

 

12

VIN

IC

1

 

6

FB/VOUT

GND

2

 

 

 

11

VIN

 

GND

3

 

 

 

10

VIN

EN 2

 

5

GND

 

17

7

FB/VOUT

4

 

9

VIN

VIN

3

4

LX

 

 

 

 

 

5

6

7

8

 

 

 

 

 

 

 

 

 

 

 

GND IC EN IC

WDFN-6L 2x2 (RT8010)

WQFN-16L 3x3 (RT8010A)

Marking Information

For marking information, contact our sales representative directly or through a Richtek distributor located in your area.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

Features

2.5V to 5.5V Input Range

Output Voltage (Adjustable Output From 0.6V to VIN)

`RT8010 : 1V, 1.2V, 1.5V, 1.6V, 1.8V, 2.5V and 3.3V Fixed/Adjustable Output Voltage

`RT8010A Adjustable Output Voltage Only

1A Output Current

95% Efficiency

No Schottky Diode Required

1.5MHz Fixed-Frequency PWM Operation

Small 6-Lead WDFN and 16-Lead WQFN Package RoHS Compliant and 100% Lead (Pb)-Free

Applications

Mobile Phones

Personal Information Appliances

Wireless and DSL Modems

MP3 Players

Portable Instruments

Ordering Information

RT8010/A(-)

Package Type

QW : WDFN/WQFN (W-Type)

Lead Plating System P : Pb Free

G : Green (Halogen Free and Pb Free)

Output Voltage

Default : Adjustable (RT8010/A) Fixed (RT8010)

10 : 1.0V

12 : 1.2V

15 : 1.5V

16 : 1.6V

18 : 1.8V

25 : 2.5V

33 : 3.3V

WQFN-16L 3x3

WDFN-6L 2x2

Note :

Richtek 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.

is a registered trademark of Richtek Technology Corporation.

DS8010/A-09 September 2012

www.richtek.com

 

1

RT8010/A

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

VIN

 

 

 

 

 

3

VIN

 

4

 

 

 

2.2µH

2.5V to 5.5V

 

 

 

 

CIN

 

LX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT

 

 

 

 

 

RT8010/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.7µF

2

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COUT

 

 

 

 

 

EN

VOUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 IC

GND

5

 

 

 

 

 

 

 

 

 

 

 

 

 

10µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 1. Fixed Voltage Regulator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIN

 

 

 

 

3

VIN

LX

4

 

 

 

2.2µH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT

 

 

2.5V to 5.5V

 

 

 

CIN

 

 

 

 

 

 

 

 

 

 

 

 

C1

 

 

 

 

 

 

 

 

 

 

 

 

 

RT8010/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.7µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

 

 

 

COUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EN

FB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 IC

GND

 

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10µF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IR2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT = VREF x 1

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with R2 = 300kΩ to 60kΩ so the IR2 = 2μA to 10μA,

and (R1 x C1) should be in the range between 3x10-6 and 6x10-6 for component selection.

 

 

 

 

Figure 2. Adjustable Voltage Regulator

 

 

 

 

Layout Guide

 

 

 

 

 

 

 

 

 

 

RT8010/A_FIX

 

 

 

RT8010/A_ADJ

 

 

 

 

 

 

 

 

 

 

 

 

IC

1

6 VOUT

 

IC

1

6

FB

Output

 

Output capacitor

 

 

 

 

capacitor

 

 

 

 

must be near

EN

2

5

GND

must be near

EN

2

5 GND

 

RT8010

 

 

 

L1

RT8010/A

 

 

 

 

L1

VIN

3

4

LX

 

 

VIN

3

4 LX

 

 

 

 

 

 

 

 

 

 

 

R1

 

 

 

 

 

 

 

 

COUT

 

 

 

 

COUT

 

 

 

 

 

 

 

 

 

 

 

LX should be

 

 

 

 

 

 

 

 

CIN

 

 

R2

 

CIN

 

LX should be connected

 

 

connected to

 

 

 

 

 

 

Inductor by wide

 

 

 

 

 

 

 

 

 

 

 

CIN must be placed

to Inductor by wide and

CIN must be placed

and short trace,

 

 

 

to the VIN as close

short trace, keep

to the VIN as close

keep sensitive

 

 

 

as possible.

 

sensitive components

as possible.

 

components away

 

 

 

 

 

away from this trace.

 

 

 

from this trace.

 

 

Figure 3

Layout note :

1.The distance that CIN connects to VIN is as close as possible (Under 2mm).

2.COUT should be placed near RT8010/A.

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS8010/A-09 September 2012

2

Richtek RT8010-10GQW, RT8010-10PQV, RT8010-10PQW, RT8010-12GQW, RT8010-12PQV, RT8010-12PQW, RT8010-15GQW, RT8010-15PQV, RT8010-15PQW, RT8010-16PQW, RT8010-18GQW, RT8010-18PQV, RT8010-18PQW, RT8010-25GQW, RT8010-25PQV, RT8010-25PQW, RT8010-33GQW, RT8010-33PQV, RT8010-33PQW, RT8010AGQW, RT8010APQW, RT8010GQW, RT8010PQV, RT8010PQW Schematic

RT8010/A

Functional Pin Description

Pin No.

Pin Name

Pin Function

RT8010

RT8010A

 

 

1

6, 8, 16

IC

Internal Connection. Leave floating and do not make connection

to this pin.

 

 

 

2

7

EN

Chip Enable (Active High).

 

 

 

 

3

9, 10, 11, 12

VIN

Power Input. (Pin 9 and Pin 10 must be connected with Pin 11).

 

 

 

 

4

13, 14, 15

LX

Pin for Switching. (Pin 13 must be connected with Pin 14).

 

 

 

 

5

1, 2, 3, 5

GND

Ground.

 

 

 

 

6

4

FB/VOUT

Feedback/Output Voltage.

 

 

 

 

7 (Exposed Pad)

17 (Exposed Pad)

GND

Ground. The exposed pad must be soldered to a large PCB and

connected to GND for maximum thermal dissipation.

 

 

 

Function Block Diagram

 

 

EN

 

 

VIN

 

 

OSC &

 

 

RS1

 

 

Current

 

 

 

 

Shutdown

 

 

 

 

Limit

 

 

 

 

Control

 

 

 

Slope

Detector

 

 

 

 

 

 

 

 

 

 

 

 

Compensation

Current

 

 

 

 

 

 

 

 

 

 

Sense

 

 

 

 

 

 

Control

Driver

LX

 

 

PWM

Logic

 

 

 

 

 

 

 

FB/VOUT

Error

Comparator

 

 

 

 

Amplifier

 

 

 

 

 

RC

 

 

 

 

 

COMP

UVLO &

 

 

RS2

 

Power Good

 

 

 

 

 

 

 

 

 

 

Detector

VREF

 

 

 

 

 

 

 

 

 

 

 

GND

 

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8010/A-09 September 2012

www.richtek.com

3

RT8010/A

Absolute Maximum Ratings

(Note 1)

 

 

 

 

 

 

 

Supply Input Voltage -------------------------------------------------------------------------------------------------

 

 

 

 

 

 

6.5V

 

 

EN, FB Pin Voltage --------------------------------------------------------------------------------------------------

 

 

 

 

 

 

−0.3V to VIN

 

 

LX Pin Switch Voltage -----------------------------------------------------------------------------------------------

 

 

 

 

 

 

−0.3V to (VIN + 0.3V)

<20ns -------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

 

−4.5V to 7.5V

 

 

LX Pin Switch Current -----------------------------------------------------------------------------------------------

 

 

 

 

 

 

2A

 

 

Power Dissipation, PD @ TA = 25°C

 

 

 

 

 

 

 

 

WDFN-6L 2x2 ---------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

 

0.833W

 

 

WQFN-16L 3x3

-------------------------------------------------------------------------------------------------------

 

 

 

 

 

 

 

1.47W

 

 

Package Thermal Resistance

(Note 2)

 

 

 

 

 

 

 

 

WDFN-6L 2x2, θJA ----------------------------------------------------------------------------------------------------

 

 

 

 

 

 

120°C/W

 

 

WDFN-6L 2x2, θJC ---------------------------------------------------------------------------------------------------

 

 

 

 

 

 

20°C/W

 

 

WQFN-16L 3x3, θJA --------------------------------------------------------------------------------------------------

 

 

 

 

 

 

68°C/W

 

 

WQFN-16L 3x3, θJC -------------------------------------------------------------------------------------------------

 

 

 

 

 

 

7.5°C/W

 

 

Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------

 

 

 

 

260°C

 

 

Storage Temperature Range ---------------------------------------------------------------------------------------

 

 

 

 

 

 

−65°C to 150°C

Junction Temperature ------------------------------------------------------------------------------------------------

 

 

 

 

 

 

150°C

 

 

ESD Susceptibility (Note 3)

 

 

 

 

 

 

 

 

 

 

HBM (Human Body Model) -----------------------------------------------------------------------------------------

 

 

 

 

 

 

2kV

 

 

Recommended Operating Conditions

(Note 4)

 

 

 

 

 

 

Supply Input Voltage -------------------------------------------------------------------------------------------------

 

 

 

 

 

 

2.5V to 5.5V

 

 

Junction Temperature Range ---------------------------------------------------------------------------------------

 

 

 

 

 

 

−40°C to 125°C

Ambient Temperature Range ---------------------------------------------------------------------------------------

 

 

 

 

 

 

−40°C to 85°C

 

Electrical Characteristics

 

 

 

 

 

 

 

 

(VIN = 3.6V, VOUT = 2.5V, L = 2.2μH, CIN = 4.7μF, COUT = 10μF, TA = 25°C, IMAX = 1A unless otherwise specified)

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Symbol

 

Test Conditions

Min

Typ

Max

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Voltage Range

 

VIN

 

 

 

2.5

--

5.5

 

 

V

 

 

 

 

 

 

 

 

 

 

 

 

Quiescent Current

 

IQ

 

IOUT = 0mA, VFB = VREF + 5%

--

50

70

 

 

μA

Shutdown Current

 

ISHDN

 

EN = GND

 

--

0.1

1

 

 

μA

 

 

 

 

 

 

 

 

 

 

 

 

Reference Voltage

 

VREF

 

For Adjustable Output Voltage

0.588

0.6

0.612

 

 

V

Adjustable Output Range

 

VOUT

 

(Note 5)

 

VREF

--

VIN − 0.2V

 

 

V

 

 

 

VOUT

 

VIN = 2.5V to 5.5V, VOUT = 1V

−3

--

3

 

 

 

 

 

 

 

0A < IOUT < 1A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT

 

VIN = 2.5V to 5.5V, VOUT = 1.2V

−3

--

3

 

 

 

 

 

 

 

0A < IOUT < 1A

 

 

 

 

Output Voltage

 

 

 

 

 

 

 

 

 

 

 

Fix

 

VOUT

 

VIN = 2.5V to 5.5V, VOUT = 1.5V

−3

--

3

 

 

%

Accuracy

 

 

0A < IOUT < 1A

 

 

 

 

 

 

VOUT

 

VIN = 2.5V to 5.5V, VOUT = 1.6V

−3

--

3

 

 

 

 

 

 

 

0A < IOUT < 1A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT

 

VIN = 2.5V to 5.5V, VOUT = 1.8V

−3

--

3

 

 

 

 

 

 

 

0A < IOUT < 1A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

 

 

www.richtek.com

 

 

 

 

 

 

DS8010/A-09 September

2012

4

 

 

 

 

 

 

 

 

 

 

 

 

RT8010/A

Parameter

Symbol

Test Conditions

 

Min

Typ

Max

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT

VIN = VOUT + V to 5.5V

(Note 6)

−3

--

3

 

 

 

VOUT = 2.5V, 0A < IOUT < 1A

 

 

Fix

 

 

 

 

 

%

Output Voltage

VOUT

VIN = VOUT + V to 5.5V

(Note 6)

−3

--

3

 

 

Accuracy

 

VOUT = 3.3V, 0A < IOUT < 1A

 

 

 

 

 

 

 

 

Adjustable

VOUT

VIN = VOUT + V to 5.5V

(Note 6)

3

--

3

%

 

 

 

0A < IOUT < 1A

 

 

 

 

 

 

FB Input Current

IFB

VFB = VIN

 

−50

--

50

nA

 

 

 

 

 

 

 

 

 

P-MOSFET RON

RDS(ON)_P

IOUT = 200mA

VIN = 3.6V

--

0.28

--

Ω

VIN = 2.5V

--

0.38

--

 

 

 

 

 

N-MOSFET RON

RDS(ON)_N

IOUT = 200mA

VIN = 3.6V

--

0.25

--

Ω

VIN = 2.5V

--

0.35

--

 

 

 

 

 

P-Channel Current Limit

ILIM_P

VIN = 2.5V to 5.5 V

 

1.4

1.5

--

A

EN High-Level Input Voltage

VEN_H

VIN = 2.5V to 5.5V

 

1.5

--

--

V

EN Low-Level Input Voltage

VEN_L

VIN = 2.5V to 5.5V

 

--

--

0.4

 

 

 

 

 

 

 

 

 

 

 

Under Voltage Lock Out threshold

UVLO

 

 

 

--

1.8

--

V

 

 

 

 

 

 

 

 

 

Hysteresis

 

 

 

 

--

0.1

--

V

 

 

 

 

 

 

 

 

Oscillator Frequency

fOSC

VIN = 3.6V, IOUT = 100mA

 

1.2

1.5

1.8

MHz

 

 

 

 

 

 

 

 

 

Thermal Shutdown Temperature

TSD

 

 

 

--

160

--

°C

Max. Duty Cycle

 

 

 

 

100

--

--

%

 

 

 

 

 

 

 

 

 

 

LX Leakage Current

 

VIN = 3.6V, VLX = 0V or VLX = 3.6V

1

--

1

μ

 

 

 

 

 

 

A

Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability.

Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is measured at the exposed pad of the package.

Note 3. Devices are ESD sensitive. Handling precaution recommended.

Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. Guarantee by design.

Note 6. V = IOUT x PRDS(ON)

Copyright ©2012 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

DS8010/A-09 September 2012

www.richtek.com

 

5

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