Richtek RT9011-BJGJ6, RT9011-BMPJ6, RT9011-BMPQW, RT9011-CBGJ6, RT9011-CCPJ6 Schematic [ru]

RT9011

Portable Power Management 300mA Dual LDO Regulator

General Description

The RT9011 is a dual channel, low noise, and low dropout

regulator sourcing up to 300mA at each channel. The range

of output voltage is from 1.2V to 3.6V by operating from

2.5V to 5.5V input.

The RT9011 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.

The RT9011 is short circuit thermal folded back protected.

The IC 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.

The RT9011 can operate stably with very small ceramic

output capacitors, reducing required board space and

component cost. The RT9011 is available in fixed output

voltages in the TSOT-23-6, WDFN-8L 2x2, WDFN-10L 3x3,

WDFN-8L 3x3 and WDFN-6L 1.6x1.6 packages.

Ordering Information

RT9011-

Package Type
J6 : TSOT-23-6
QW : WDFN-8L 2x2 (W-Type)
QWA : WDFN-10L 3x3 (W-Type)
QWB : WDFN-8L 3x3 (W-Type)
QWC : WDFN-6L 1.6x1.6 (W-Type)

Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)

Output Voltage : VOUT1/VOUT2
VOUT2 > VOUT1 is Recommended

Note :

Richtek products are :

` RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

Features

z Wide Operating Voltage Ranges : 2.5V to 5.5V
z Low-Noise for RF Application
z No Noise Bypass Capa citor Required
z Fast Response in Line/Load Transient
z TTL-Logic-Controlled Shutdown Input
z Low Temperature Coefficient

zz

z Dual LDO Outputs (300mA/300mA)

zz

zz

z Ultra-low Quiescent Current 27

zz

zz

z High Output Accuracy 2%

zz

zz

z Short Circuit Protection

zz

zz

z Thermal Shutdown Protection

zz

zz

z Current Limit Protection

zz

zz

z Short Circuit Thermal Folded Back Protection

zz

zz

z Tiny TSOT-23-6 and 6-Lead/8-Lead/10-Lead WDFN

zz

μμ

μA/LDO

μμ

Packages

zz

z RoHS Compliant and 100% Lead (Pb)-Free

zz

Applications

zz

z CDMA/GSM Cellular Handsets

zz

zz

z Battery-Powered Equipment

zz

zz

z Laptop, Palmtops, Notebook Computers

zz

zz

z Hand-Held Instruments

zz

zz

z PCMCIA Cards

zz

zz

z Portable Information Appliances

zz

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

Available Voltage Version

Code Voltage Code Voltage Code Voltage

A 3.5 B 1.3 C 1.2

D 1.85 E 2.1 F 1.5

G 1.8 H 2 J 2.5

K 2.6 L 2.7 M 2.8
N 2.85 P 3 Q 3.1

R 3.2 S 3.3 T 2.65
V 2.9 W 1.6 X 3.15
Y 1.9

DS9011-08 April 2011 www.richtek.com

1

RT9011

Pin Configurations

VIN EN1VOUT1

(TOP VIEW)

4

56

23

VIN
EN1
EN2

NC

1

2

3

4

GND

8

VOUT1

7

VOUT2

6

NC

9

5

GND

GND EN2VOUT2

TSOT-23-6

WDFN-8L 2x2

Typical Application Circuit

V

IN

C

1uF

IN

Chip Enable

Functional Pin Description

Pin No.

TSOT-23-6

WDFN-8L

2x2

WDFN-10L

3x3

WDFN-8L

3x3

1

VIN

2

EN1
EN2

NC
NC

GND

3
4
5

WDFN-10L 3x3

VIN

EN1

EN2

WDFN-6L

1.6x1.6

10

VOUT1

9

VOUT2

8

NC

7

NC

9

11

GND

VIN
EN1
EN2

NC

1

2

3

4

GND

8

VOUT1

7

NC

6

GND

9

5

VOUT2

WDFN-8L 3x3

RT9011

GND

VOUT1

VOUT2

C

1uF

C

1uF

OUT1

OUT2

V

V

OUT1

OUT2

Pin Name Pin Function

VIN

EN2

1

2

3

GND

6

5

7

4

WDFN-6L 1.6x1.6

VOUT1
VOUT2EN1
GND

5 1 1 1 1 VIN Supply Input.

4 2 2 2 2 EN1 Chip Enab le1 (Active High).

3 3 3 3 3 EN2 Chip Enab le2 (Active High).

5,

2

Exposed

Pad (9)

6,

Exposed

Pad (11)

6,

Exposed

Pad (9)

4,

Expo sed

Pad (7)

GND

Common Ground. Th e exposed pad must be

soldered to a large PCB and connected to
GND for maximum power dissipation.

1 7 9 5 5 VOUT2 Channel 2 Out put Voltage.

6 8 10 8 6 VOUT1 Channel 1 Out put Voltage .

-- 4, 6 4, 5, 7, 8 4, 7 -- NC No Interna l Co nnection.

DS9011-08 April 2011www.richtek.com

2

Function Block Diagram

RT9011

EN1

EN2

0.2uA

0.2uA

Shutdown

and

Logic Control

V

REF

-

+

Error

Amplifier

Shutdown

Logic Control

V

REF

-

+

Error

Amplifier

MOS Driver

Current-Limit

and

Thermal

Protection

and

MOS Driver

Current-Limit

and

Thermal

Protection

VIN

VOUT1

GND

VOUT2

GND

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3

RT9011

Absolute Maximum Ratings (Note 1)

z Supply Input Voltage ------------------------------------------------------------------------------------------------------ −0.3V to 7V
z Other I/O Pin Voltages --------------------------------------------------------------------------------------------------- −0.3V to 7V

z Power Dissipation, P

TSOT-23-6------------------------------------------------------------------------------------------------------------------- 0.455W

WDFN-8L 2x2 -------------------------------------------------------------------------------------------------------------- 0.606W

WDFN-10L 3x3 ------------------------------------------------------------------------------------------------------------- 0.926W

WDFN-8L 3x3 -------------------------------------------------------------------------------------------------------------- 0.926W

WDFN-6L 1.6x1.6 --------------------------------------------------------------------------------------------------------- 0.571W

z Package Thermal Resistance (Note 2)

TSOT-23-6, θJA------------------------------------------------------------------------------------------------------------- 220°C/W

WDFN-8L 2x2, θJA--------------------------------------------------------------------------------------------------------- 165°C/W

WDFN-10L 3x3, θJA------------------------------------------------------------------------------------------------------- 108°C/W

WDFN-8L 3x3, θJA--------------------------------------------------------------------------------------------------------- 108°C/W

WDFN-6L 1.6x1.6, θJA---------------------------------------------------------------------------------------------------- 175°C/W

z Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C

z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C

z Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C

z ESD Susceptibility (Note 3)

HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV

MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V

@ T

D

= 25°C

A

Recommended Operating Conditions (Note 4)

z Supply Input Voltage ------------------------------------------------------------------------------------------------------ 2.5V to 5.5V

z Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V
z Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
z Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C

Electrical Characteristics

(V

= V

OUT

+ 1V, V

IN

Parameter Symbol Test Conditions Min Typ Max Unit

Input Voltage

Dropout Voltage (Note 5)

Output voltage range

V

Accuracy ΔV I

OUT

Line Regulation

Load Regulation

Current Limit

Quiescent Current

Shutdown Current

EN Threshold

4

= VIN, C

EN

= C

IN

= 1μF, TA = −40°C to 85°C, unless otherwise specified.)

OUT

= 2.5V to 5.5V

V

IN

I

V

DROP

V

OUT

ΔV

LINE

ΔV

LOA D

I

VEN > 1.5V

Q

I

VEN < 0.4V

Q_SD

VIH V

V

V

IL

= 300mA

OU T

1.2 -- 3.6 V

= 1mA to 300mA −3

OU T

= (V

V

IN

> 2.5V, whichever is larger

V

IN

1mA < I

R

= 1Ω

LOA D

= 2.5V to 5.5V, Power On

IN

= 2.5V to 5.5V, Shutdown

IN

+ 0.3V) to 5.5V or

OUT

< 300mA

OU T

2.5 -- 5.5 V

-- 240 330 mV

-- +3 %

-- -- 0.2 %/V

-- -- 0.6 %

330 450 700 mA

-- 58 80 μA

-- -- 1

μA

1.5 -- -­V

-- -- 0.4

To be continued

DS9011-08 April 2011www.richtek.com

RT9011

Parameter Symbol Test Conditions Min Typ Max Unit

Output Voltage TC -- 100 -- ppm/°C

V

Discharge Resistance in

OU T

Shutdown (Note 6)

EN Pull Low Current

Thermal Shutdown

Thermal Shutdown Hysteresis

I

EN

T

ΔT

SD

= 5V, EN1 = EN2 = GND

V

IN

-- 0.2 -- μA

-- 170 --

-- 40 -- °C

SD

f = 100Hz

f = 1kHz -- 70 -­PSRR
V

IN

I

LOA D

= V

+ 1V, C

OUT

= 50mA

OUT

= 2.2μF

PSRR

Output Voltage Noise

Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for

stress ratings. 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 for extended

periods may remain possibility to affect device reliability.

Note 2. θ

Note 3. Devices are ESD sensitive. Handling precaution recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Note 5. The dropout voltage is defined as V
Note 6. It is guaranteed by design.

is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of

JA

JEDEC 51-3 thermal measurement standard.

f = 10kHz -- 70 --

f = 100kHz -- 54 --

= C

OUT1

= 10uF, 10Hz to

OUT2

= I

OUT2

= 1mA

OUT

is V

-V

IN

OUT

f = 200kHz

f = 300kHz

C

OU T1

100kHz, I

, which is measured when V

-- 3 -- kΩ

°C

-- 70 --

dB

-- 45 --

-- 38 --

-- 100 -- uVrms

OUT(NORMAL)

− 100mV.

DS9011-08 April 2011 www.richtek.com

5

RT9011

Typical Operating Characteristics

Output Voltage vs. Temperature

1.9

RT9011-GS, V

1.85

1.8

Output Voltage (V)

1.75

1.7

-50 -25 0 25 50 75 100 125

OUT1

Temperature

(°C)

Quiescent Current vs. Temperature

70

RT9011-GS
VIN = V

CIN = C

65

60

55

Quiescent Current (uA)

EN

OUT1

= 4.3V

= C

OUT2

= 1uF/X7R

Output Voltage vs. Temperature

3.4

RT9011-GS, V

3.35

3.3

3.25

Output Voltage (V)

3.2

-50 -25 0 25 50 75 100 125

OUT2

Temperature

(°C)

Dropout Voltage vs. Load Current

350

RT9011-GS, V

300

250

200

150

100

Dropout Voltage (mV)

50

OUT2

TJ = 125°C

TJ = 25°C

TJ = -40°C

6

50

V

EN

(5V/Div)

V

OUT1

(1V/Div)

V

OUT2

(2V/Div)

POR

(5V/Div)

-50 -25 0 25 50 75 100 125

Temperature

(°C)

Power-On

RT9011-FM
Both I

LOAD

= 10mA

Time (10μs/Div)

0

4.8

V

IN

(V)

3.8

V

OUT2

(10mV/Div)

V

OUT1

(10mV/Div)

0 50 100 150 200 250 300

Load Curre nt (mA)

Line Transient Response

RT9011-GS, Both I
V

= 3.8V to 4.8V

IN

= 1mA

LOAD

Time (100μs/Div)

DS9011-08 April 2011www.richtek.com

RT9011

4.8

V

IN

(V)

3.8

V

OUT2

(10mV/Div)

V

OUT1

(10mV/Div)

4.8

V

IN

(V)

3.8

V

OUT2

(10mV/Div)

V

OUT1

(10mV/Div)

Line Transient Response

RT9011-GS, Both I
V

= 3.8V to 4.8V

IN

= 10mA

LOAD

Time (100μs/Div)

Line Transient Response

RT9011-GS, Both I
V

= 3.8V to 4.8V

IN

LOAD

= 100mA

4.8

V

IN

(V)

3.8

V

OUT2

(10mV/Div)

V

OUT1

(10mV/Div)

I

OUT

(50mA/Div)

V

OUT1

(20mV/Div)

V

OUT2

(20mV/Div)

Line Transient Response

RT9011-GS, Both I
V

= 3.8V to 4.8V

IN

= 50mA

LOAD

Time (100μs/Div)

Load Transient Response

RT9011-GS, I
V

= V

IN

EN

CIN = C

OUT1

LOAD

= 4.3V

= C

OUT2

= 10mA to 50mA

= 1uF/X7R

Time (250μs/Div)

= 5V

IN

= 50mA

OUT2

Start Up

V

OUT2

I

OUT

(100mA/Div)

V

OUT1

Time (100μs/Div)

Load Transient Response

RT9011-GS, I
V

= V

IN

EN

CIN = C

OUT1

LOAD

= 4.3V

= C

OUT2

= 10mA to 100mA

= 1uF/X7R

(5V/Div)

RT9011-FM, V
I

= I

OUT1

V

EN

(20mV/Div)

V

V

OUT2

(20mV/Div)

(1V/Div)

Time (250μs/Div)

OUT1

Time (5μs/Div)

DS9011-08 April 2011 www.richtek.com

7

RT9011

0

(5V/Div)

(1V/Div)

150

100

EN Pin Shutdown Response

RT9011-FM, V
I

= I

OUT1

OUT2

V

EN

V

OUT2

V

OUT1

RT9011-GS, No LOAD
V

= V

= 4.5V(By battery)

EN

= C

= C

OUT1

50

IN

C

IN

= 5V

IN

= 50mA

Time (50μs/Div)

Noise

= 1uF/X7R

OUT2

PSRR

20

I

= 50mA

OUT

0

-20

-40

PSRR(dB)

-60

-80
10 100 1000 10000 100000 100000

PSRR

Frequency(Hz)

Noise

300

200

100

RT9011-GS, I
V

= V

IN

EN

= C

C

IN

OUT1

= 50mA

LOAD

= 4.5V(By battery)

= C

= 1uF/X7R

OUT2

1M100k10k1k

Noise (μV/Div)

-100

-150

V

EN1

(2V/Div)

V

EN2

(2V/Div)

(1V/Div)

-50

-100

Noise (μV/Div)

0

0

-200

-300

Time (10ms/Div)

EN1 Pin Response

V

V

V

EN2

V

EN1

OUT2

OUT1

V

EN1

(2V/Div)

V

EN2

(2V/Div)

(1V/Div)

Time (10ms/Div)

EN2 Pin Response

V

V

V

EN1

V

EN2

OUT1

OUT2

Time (10ms/Div) Time (10ms/Div)

DS9011-08 April 2011www.richtek.com

8

Applications Information

RT9011

Like any low-dropout regulator, the external capacitors used

with the RT9011 must be carefully selected for regulator

stability and performance. Using a capacitor whose value

is > 1μF on the RT9011 input and the amount of capacitance

can be increased without limit. The input capacitor must

be located a distance of not more than 0.5 inch from the

input pin of the IC and returned to a clean analog ground.

Any good quality ceramic or tantalum can be used for this

capacitor. The capacitor with larger value and lower ESR

(equivalent series resistance) provides better PSRR and

line-transient response.

The output capacitor must meet both requirements for

minimum amount of capacitance and ESR in all LDOs

application. The RT9011 is designed specifically to work

with low ESR ceramic output capacitor in space-saving

and performance consideration. Using a ceramic capacitor

whose value is at least 1μF with ESR is > 20mΩ on the

RT9011 output ensures stability. The RT9011 still works

well with output capacitor of other types due to the wide

stable ESR range. Figure 1. shows the curves of allowable

ESR range as a function of load current for various output

capacitor values. Output capacitor of larger capacitance

can reduce noise and improve load transient response,

stability, and PSRR. The output capacitor should be located

not more than 0.5 inch from the VOUT pin of the RT9011

and returned to a clean analog ground.

Thermal Considerations

Thermal protection limits power dissipation in RT9011.

When the operation junction temperature exceeds 170°C,

the OTP circuit starts the thermal shutdown function and

turns the pass element off. The pass element turns on

again after the junction temperature cools by 40°C.

RT9011 lowers its OTP trip level from 170°C to 110°C

when output short circuit occurs (V

< 0.4V) as shown

OUT

in Figure 2. It limits IC case temperature under 100°C and

provides maximum safety to customer while output short

circuit occurring.

V

Short to GND

OUT

0.4V

V

OUT

I

OUT

TSD

°

170 C

110 C

OTP Trip Point

IC Temperature

°

°

110 C

80 C

°

Region of Stable C

100

10

ESR (Ω)

ESR (Ω)

OUT

OUT

1

0.1

OUT

RT9011-FM, V
C

= C

IN

Unstable Range

Stable Range

ESR vs. Load Current

= 5V

IN

= C

OUT2

= 1uF/X7R

OUT1

Figure 2. Short Circuit Thermal Folded Back Protection

when Output Short Circuit Occurs (Patent)

For continuous operation, do not exceed absolute

maximum operation junction temperature 125°C. The

power dissipation definition in device is :

PD = (VIN-V

OUT

) x I

+ VIN x I

OUT

Q

The maximum power dissipation depends on the thermal

resistance of IC package, PCB layout, the rate of

0.01

Region of Stable C

Region of Stable C

0.001
0 50 100 150 200 250 300

Figure 1. Stable Cout ESR Range

Simulation Verify

Load Current (mA)

surroundings airflow and temperature difference between

junction to ambient. The maximum power dissipation can

be calculated by following formula :

P

Where T

temperature, T

D(MAX)

= ( T

J(MAX)

- TA ) /θ

J(MAX)

JA

is the maximum operation junction

is the ambient temperature and the θ

A

JA

the junction to ambient thermal resistance.

DS9011-08 April 2011 www.richtek.com

is

9

RT9011

For recommended operating conditions specification of

RT9011, the maximum junction temperature is 125°C. The

junction to ambient thermal resistance ( θJA is layout

dependent ) for TSOT-23-6 is 220°C/W, WDFN-8L 2x2 is

165°C/W, WDFN-10L 3x3 is 108°C/W, WDFN-8L 3x3 is

108°C/W and WDFN-8L 1.6x1.6 is 175°C/W on the

standard JEDEC 51-3 single-layer thermal test board. The

maximum power dissipation at TA = 25°C can be calculated

by following formula :

P

= ( 125°C − 25°C ) / (220°C/W) = 0.455W for

D(MAX)

TSOT-23-6 packages

P

= ( 125°C − 25°C ) / (165°C/W) = 0.606W for

D(MAX)

WDFN-8L 2x2 packages

P

= ( 125°C − 25°C ) / (108°C/W) = 0.926W for

D(MAX)

WDFN-10L 3x3 packages

P

= ( 125°C − 25°C ) / (108°C/W) = 0.926W for

D(MAX)

WDFN-8L 3x3 packages

P

= ( 125°C − 25°C ) / (175°C/W) = 0.571W for

D(MAX)

WDFN-6L 1.6x1.6 packages

The maximum power dissipation depends on operating

ambient temperature for fixed T

and thermal

J(MAX)

resistance θJA. For RT9011 packages, the Figure 3 of de-

rating curves allows the designer to see the effect of rising

ambient temperature on the maximum power allowed.

1

0.9

0.8

0.7

WDFN-8L 2x2

0.6

0.5

TSOT-23-6

0.4

0.3

Power Dissipation (W)

0.2

0.1

0

0 25 50 75 100 125

WDFN-6L 1.6x1.6

WDFN-8L 3x3
WDFN-10L 3x3

Ambient Temperature (°C)

Single Layer PCB

Figure 3. Derating Curves for RT9011 Packages

10

DS9011-08 April 2011www.richtek.com

Outline Dimension

RT9011

H

D

L

C

b

A

e

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.700 1.000 0.028 0.039

A1 0.000 0.100 0.000 0.004

B 1.397 1.803 0.055 0.071

b 0.300 0.559 0.012 0.022

C 2.591 3.000 0.102 0.118

D 2.692 3.099 0.106 0.122

e 0.838 1.041 0.033 0.041

B

A1

H 0.080 0.254 0.003 0.010

L 0.300 0.610 0.012 0.024

TSOT-23-6 Surface Mount Package

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11

RT9011

D

E

A

A3

A1

D2

L

E2

SEE DETAIL A

1

2

e

b

1

1

2

DETAIL A

Pin #1 ID and Tie Bar Mark Options

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.700 0.800 0.028 0.031

A1 0.000 0.050 0.000 0.002

A3 0.175 0.250 0.007 0.010

b 0.200 0.300 0.008 0.012

D 1.950 2.050 0.077 0.081

D2 1.000 1.250 0.039 0.049

E 1.950 2.050 0.077 0.081

E2 0.400 0.650 0.016 0.026

e 0.500 0.020

L 0.300 0.400

W-Type 8L DFN 2x2 Package

0.012 0.016

12

DS9011-08 April 2011www.richtek.com

RT9011

D

E

A

A3

A1

D2

L

E2

SEE DETAIL A

1

2

e

b

1

1

2

DETAIL A

Pin #1 ID and Tie Bar Mark Options

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.700 0.800 0.028 0.031

A1 0.000 0.050 0.000 0.002

A3 0.175 0.250 0.007 0.010

b 0.180 0.300 0.007 0.012

D 2.950 3.050 0.116 0.120

D2 2.300 2.650 0.091 0.104

E 2.950 3.050 0.116 0.120

E2 1.500 1.750 0.059 0.069

e 0.500 0.020

L 0.350 0.450

0.014 0.018

W-Type 10L DFN 3x3 Package

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13

RT9011

D

E

A

A3

A1

D2

L

E2

SEE DETAIL A

1

e

b

2

1

DETAIL A

1

2

Pin #1 ID and Tie Bar Mark Options

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.700 0.800 0.028 0.031

A1 0.000 0.050 0.000 0.002

A3 0.175 0.250 0.007 0.010

b 0.200 0.300 0.008 0.012

D 2.950 3.050 0.116 0.120

D2 2.100 2.350 0.083 0.093

E 2.950 3.050 0.116 0.120

E2 1.350 1.600 0.053 0.063

e 0.650 0.026

L 0.425 0.525

0.017 0.021

W-Type 8L DFN 3x3 Package

14

DS9011-08 April 2011www.richtek.com

RT9011

D

E

A

A3

A1

D2

L

E2

SEE DETAIL A

1

e

b

2

1

DETAIL A

1

2

Pin #1 ID and Tie Bar Mark Options

Note : The configuration of the Pin #1 identifier is optional,

but must be located within the zone indicated.

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Max

A 0.700 0.800 0.028 0.031

A1 0.000 0.050 0.000 0.002

A3 0.175 0.250

b 0.200 0.300 0.008 0.012

D 1.550 1.650 0.061 0.065

D2 0.950 1.050 0.037 0.041

E 1.550 1.650 0.061 0.065

E2 0.550 0.650 0.022 0.026

e 0.500 0.020

L 0.190 0.290

Richtek Technology Corporation

Headquarter

5F, No. 20, Taiyuen Street, Chupei City

Hsinchu, Taiwan, R.O.C.

Tel: [phone] Fax: [phone]

0.007 0.010

0.007 0.011

W-Type 6L DFN 1.6x1.6 Package

Richtek Technology Corporation

Taipei Office (Marketing)

5F, No. 95, Minchiuan Road, Hsintien City

Taipei County, Taiwan, R.O.C.

Tel: [phone] Fax: [phone]

Email: [e-mail]

Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit

design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be

guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek.

DS9011-08 April 2011 www.richtek.com

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