430_ Ranges _ 2.5V to 5

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Preliminary

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. RT9011 offers 2% accuracy, extremely low dropout voltage (240mV @ 300mA), and extremely low ground current, only 27?ÌA 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. RT9011 is short circuit thermal folded back protected. RT9011 lowers its OTP trip point from 165?ãC to 110?ãC when output short circuit occurs (VOUT < 0.4V) providing maximum safety to end users. RT9011 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. RT9011 is available in fixed output voltages in the TSOT-23-6 and WDFN-8L 2x2 package.

Features

Wide Operating Voltage Ranges : 2.5V to 5.5V Low-Noise for RF Application No Noise Bypass Capacitor Required Fast Response in Line/Load Transient TTL-Logic-Controlled Shutdown Input Low Temperature Coefficient Dual LDO Outputs (300mA/300mA) Ultra-low Quiescent Current 27?ÌA/LDO ?Ì High Output Accuracy 2% Short Circuit Protection Thermal Shutdown Protection Current Limit Protection Short Circuit Thermal Folded Back Protection Tiny TSOT-23-6 and 8-Lead WDFN Package RoHS Compliant and 100% Lead (Pb)-Free

Applications

CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances

Ordering Information

RT9011Package Type J6 : TSOT-23-6 QW : WDFN-8L 2x2 (W-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Output Voltage : VOUT1/VOUT2 CM : 1.20V/2.80V, FM : 1.50V/2.80V GK : 1.80V/2.60V, GS : 1.80V/3.30V JG : 2.50V/1.80V, JM : 2.50V/2.80V JP : 2.50V/3.00V, JS : 2.50V/3.30V JN : 2.50V/2.85V, MG : 2.80V/1.80V MM : 2.80V/2.80V, NN : 2.85V/2.85V MS : 2.80V/ 3.30V, PG : 3.00V/1.80V MP : 2.80V/3.00V, PP : 3.00V/3.00V SS : 3.30V/3.30V, SQ : 3.30V/3.10V BM : 1.30V/2.80V, MB : 2.80V/1.30V MJ :

2.8V/2.5V

Pin Configurations

(TOP VIEW)

VOUT1 VIN 6 1 5 2 EN1 4 3

VIN EN1 EN2 NC

1 2 3

4

8

7 6

5

VOUT1 VOUT2 NC GND

VOUT2 GND EN2

TSOT-23-6

WDFN-8L 2x2

Note : There is no pin1 indicator on top mark for TSOT-23-6 type, and pin 1 will be lower left pin when reading top mark from left to right.

Note : RichTek Pb-free and Green 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. DS9011-05PT00 November 2006

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.

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RT9011

Typical Application Circuit

VIN

Preliminary

VIN CIN 1uF EN1 VOUT2 EN2 GND COUT2 1uF VOUT2 VOUT1 RT9011 Chip Enable COUT1 1uF VOUT1

Functional Pin Description

Pin No. RT9011-?õ?õPQW 1 2 3 5 7 8 4, 6 Exposed Pad RT9011-?õ?õPJ6 5 4 3 2 1 6 --Pin Name VIN EN1 EN2 GND VOUT2 VOUT1 NC GND Supply Input Chip Enable1 (Active High) Chip Enable2 (Active High) Common Ground Channel 2 Output Voltage Channel 1 Output Voltage No Connection Exposed pad should be soldered to PCB board and connected to GND. Pin Function

Available Voltage Version

Code Voltage Code Voltage C 1.2 T 2.65 B 1.3 L 2.7 F 1.5 M 2.8 W 1.6 N 2.85 G 1.8 V 2.9 D 1.85 P 3 Y 1.9 Q 3.1 H 2 R 3.2 E 2.1 S 3.3 J 2.5 --K 2.6 ---

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DS9011-05PT00

November 2006

Preliminary Function Block Diagram

EN1 Shutdown and Logic Control VREF VIN

RT9011

+

MOS Driver VOUT1 Current-Limit and Thermal Protection GND

Error Amplifier

EN2

Shutdown and Logic Control VREF -

+

MOS Driver VOUT2 Current-Limit and Thermal Protection GND

Error Amplifier

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November 2006

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RT9011

Absolute Maximum Ratings

Preliminary

(Note 1) 6V 6V 0.455W 0.606W 220?ãC/W 165?ãC/W 260?ãC ?65?ãC to 150?ãC 2kV 200V

Supply Input Voltage

-----------------------------------------------------------------------------------------------------Other I/O Pin Voltages --------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25?ãC TSOT23-6

------------------------------------------------------------------------------------------------------------------WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 4) TSOT23-6, ?ÈJA

-------------------------------------------------------------------------------------------------------------WDFN-6L 2x2, ?ÈJA --------------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.)

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

-------------------------------------------------------------------------------------------ESD Susceptibility (Note 2) HBM (Human Body Mode)

---------------------------------------------------------------------------------------------MM (Machine Mode)

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

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

Recommended Operating Conditions

(Note 3)

Supply Input Voltage

------------------------------------------------------------------------------------------------------ 2.5V to 5.5V Enable Input Voltage ------------------------------------------------------------------------------------------------------ 0V to 5.5V Junction Temperature Range

-------------------------------------------------------------------------------------------- ?40?ãC to 125?ãC Ambient Temperature Range -------------------------------------------------------------------------------------------- ?40?ãC to 85?ãC

(VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 1?ÌF, TA = 25?ãC, unless otherwise specified.)

Electrical Characteristics

Parameter Input Voltage Dropout Voltage (Note 5) Output voltage range VOUT Accuracy Line Regulation Load Regulation Current Limit Quiescent Current Shutdown Current EN Threshold Output Voltage TC Thermal Shutdown Thermal Shutdown Hysteresis IQ

Symbol VIN VDROP VOUT ??V ??VLINE

Test Conditions VIN = 2.5V to 5.5V IOUT = 300mA IOUT = 1mA VIN = (VOUT + 0.3V) to 5.5V or VIN > 2.5V, whichever is larger RLOAD = 1? VEN > 1.5V VEN < 0.4V VIN = 2.5V to 5.5V, Power On VIN = 2.5V to 5.5V, Shutdown

Min 2.5 -1.2 -2 --330 --1.5 -----

Typ -240 ----450 58 ---100 170 40

Max 5.5 330 3.6 +2 0.2 0.6 700 80 1 -0.4 ----

Units V mV V % %/V % mA ?ÌA ?ÌA V ppm/?ãC ?ãC ?ãC

??VLOAD 1mA < IOUT< 300mA

IQ_SD VIH VIL TSD ??TSD

To be continued

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November 2006

Preliminary

Parameter PSRR ILOAD = 10mA Symbol PSRR Test Conditions f =100Hz f =1kHz f =10kHz PSRR ILOAD = 150mA f =100Hz PSRR f =1kHz f =10kHz Min ------Typ 65 60 50 65 50 50

RT9011

Max ------Units dB dB dB dB dB dB

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. Devices are ESD sensitive. Handling precaution recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. ?ÈJA is measured in the natural convection at T A = 25?ãC on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) ? 100mV.

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November 2006

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RT9011

Preliminary

Typical Operating Characteristics

Output Voltage vs. Temperature

1.9

Output Voltage vs. Temperature

3.4

RT9011-GS, VOUT1

RT9011-GS, VOUT2

Output Voltage (V)

1.85

3.35

1.8

3.3

1.75

3.25

1.7 -50 -25 0 25 50 75 100 125

3.2 -50 -25 0 25 50 75 100 125

Temperature (?ãC)

Quiescent Current vs. Temperature

70

Dropout Voltage vs. Load Current

350 300

Quiescent Current (uA)

65

Dropout Voltage (mV)

RT9011-GS VIN = VEN = 4.3V CIN = COUT1 = COUT2 = 1uF/X7R

RT9011-GS, VOUT2 TJ = 125?ãC TJ = 25?ãC

250 200 150 100 50

60

TJ = -40?ãC

55

50 -50 -25 0 25 50 75 100 125

0 0 50 100 150 200 250 300

Temperature (?ãC)

Load Current (mA)

20

PSRR

RT9011-FM, VOUT1 VIN = 4.3V ?À 0.1V CIN = COUT1 = COUT2 = 1uF/X7R

RT9011-FM Both ILOAD = 10mA ILOAD = 100mA ILOAD = 50mA

Power-On

0

PSRR (dB)

-20

VEN (5V/Div) VOUT1 (1V/Div) VOUT2 (2V/Div) POR (5V/Div) Time

(10?Ìs/Div)

-40

ILOAD = 10mA

-60

-80

0.01 10

0.1 100

1 1000

10k 10000

100k 100000

1000k 1000000

Frequency (Hz) (Hz)

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Preliminary

RT9011

Line Transient Response

RT9011-GS, Both ILOAD = 10mA VIN = 3.8V to 4.8V

Line Transient Response

RT9011-GS, Both ILOAD = 1mA VIN = 3.8V to 4.8V

VIN 4.8 (V)

3.8

VIN 4.8 (V)

3.8

VOUT2 (10mV/Div) VOUT1 (10mV/Div)

Time (100?Ìs/Div)

Line Transient Response

RT9011-GS, Both ILOAD = 50mA VIN = 3.8V to 4.8V

Line Transient Response

RT9011-GS, Both ILOAD = 100mA VIN = 3.8V to 4.8V

VIN 4.8 (V)

3.8

VIN 4.8 (V)

3.8

VOUT2 (10mV/Div) VOUT1 (10mV/Div)

Time (100?Ìs/Div)

Load Transient Response

RT9011-GS, ILOAD = 10mA to 50mA VIN = VEN = 4.3V CIN = COUT1 = COUT2

= 1uF/X7R

Load Transient Response

RT9011-GS, ILOAD = 10mA to 100mA VIN = VEN = 4.3V CIN = COUT1 = COUT2

= 1uF/X7R

IOUT (50mA/Div) VOUT1 (20mV/Div) VOUT2 (20mV/Div) Time (250?Ìs/Div)

IOUT (100mA/Div) VOUT1 (20mV/Div) VOUT2 (20mV/Div) Time (250?Ìs/Div)

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November 2006

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RT9011

Start Up

RT9011-FM, VIN = 5V IOUT1 = IOUT2 = 50mA

Preliminary

EN Pin Shutdown Response

RT9011-FM, VIN = 5V IOUT1 = IOUT2 = 50mA

(5V/Div)

V EN V OUT2

(5V/Div)

V EN

V OUT2 V OUT1 V OUT1

(1V/Div) Time (5?Ìs/Div)

(1V/Div) Time (50?Ìs/Div)

Noise

RT9011-GS, ILOAD = 50mA VIN = VEN = 4.5V(By battery) 300 CIN = COUT1

= COUT2 = 1uF/X7R 200

Noise

RT9011-GS, No LOAD VIN = VEN = 4.5V(By battery) 150 CIN = COUT1 =

COUT2 = 1uF/X7R 100

Noise (?ÌV/Div)

100 0 -100 -200 -300

50 0 -50 -100 -150

Time (10ms/Div)

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November 2006

Preliminary Applications Information

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 > 1?ÌF 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 1?ÌF with ESR is > 20m?? 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

RT9011

Thermal protection limits power dissipation in RT9011. When the operation junction temperature exceeds 170?ãC, the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turn on again after the junction temperature cools by 40?ãC. RT9011 lowers its OTP trip level from 170?ãC to 110?ãC when output short circuit occurs (VOUT < 0.4V) as shown in Figure 2. It limits IC case temperature under 100?ãC and provides maximum safety to customer while output short circuit occurring.

VOUT Short to GND

0.4V VOUT

IOUT

TSD 170 ?ãC 110 ?ãC OTP Trip Point 110 ?ãC IC Temperature 80 ?ãC

Region of Stable COUT ESR vs. Load Current

100

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?ãC. The power dissipation definition in device is : PD = (VIN-VOUT) x IOUT + VIN x IQ

Region of Stable C OUT ESR (??) Region of Stable C OUT ESR (?)

10

RT9014-FM, VIN = 5V CIN = COUT1 = COUT2 = 1uF/X7R Unstable Range

1

0.1

Stable Range

0.01

Simulation Verify

0.001 0 50 100 150 200 250 300

The maximum powerdissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : PD(MAX) = ( TJ(MAX) - TA ) /?ÈJA Where T J(MAX) is the maximum operation junction temperature 125?ãC, TA is the ambient temperature and the ?ÈJA is the junction to ambient thermal resistance.

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Load Current (mA)

Figure 1. Stable Cout ESR Range

DS9011-05PT00

November 2006

RT9011

Preliminary

For recommended operating conditions specification of RT9011, where T J(MAX) is the maximum junction temperature of the die (125?ãC) and TA is the operated ambient temperature. The junction to ambient thermal resistance (?ÈJA is layout dependent) for TSOT-23-6 package is 220?ãC/W and WDFN-8L 2x2 is 165?ãC/W on the standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at TA = 25?ãC can be calculated by following formula : PD(MAX) = ( 125?ãC - 25?ãC ) / 220 = 0.455 W for TSOT-23-6 packages P D(MAX) = ( 125?ãC - 25?ãC ) / 165 = 0.606 W for WDFN-8L 2x2 packages The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance ?ÈJA. For RT9011 packages, the Figure 3 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed.

Power Dissipation vs. Ambient Temperature

0.8 0.7

Power Dissipation (W)

0.6 0.5 0.4 0.3 0.2 0.1 0 0 25

WDFN-8L 2x2

TSOT-23-6

50

75

100

125

Ambient Temperature (?ãC)

Figure 3. Derating Curves for RT9011 Packages

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Preliminary Outline Dimension

RT9011

H D L C B

b A A1 e

Symbol A A1 B b C D e H L

Dimensions In Millimeters Min 0.700 0.000 1.397 0.300 2.591 2.692

0.838 0.080 0.300 Max 1.000 0.100 1.803 0.559 3.000 3.099 1.041 0.254

0.610

Dimensions In Inches Min 0.028 0.000 0.055 0.012 0.102 0.106 0.033

0.003 0.012 Max 0.039 0.004 0.071 0.022 0.118 0.122 0.041 0.010 0.024

TSOT-23-6 Surface Mount Package

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November 2006

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RT9011

Preliminary

D

D2

L

E

E2 SEE DETAIL A

1

e A A1 A3

b

2

1

2

1

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

DOCSFORD

430_ Ranges _ 2.5V to 5