Preliminary
RT9011
Portable Power Management 300mA Dual LDO Regulator
General Description
The RT9011 is a dual channel, low noise, and low dropoutregulator sourcing up to 300mA at each channel. The rangeof output voltage is from 1.2V to 3.6V by operating from2.5V to 5.5V input.
RT9011 offers 2% accuracy, extremely low dropout voltage(240mV @ 300mA), and extremely low ground current,only 27μA per LDO. The shutdown current is near zerocurrent which is suitable for battery-power devices. Otherfeatures include current limiting, over temperature, outputshort circuit protection.
RT9011 is short circuit thermal folded back protected.RT9011 lowers its OTP trip point from 165°C to 110°Cwhen output short circuit occurs (VOUT < 0.4V) providingmaximum safety to end users.
RT9011 can operate stably with very small ceramic outputcapacitors, reducing required board space and componentcost. RT9011 is available in fixed output voltages in theTSOT-23-6 and WDFN-8L 2x2 package.
Features
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Wide Operating Voltage Ranges : 2.5V to 5.5VLow-Noise for RF Application
No Noise Bypass Capacitor RequiredFast Response in Line/Load TransientTTL-Logic-Controlled Shutdown InputLow Temperature Coefficient
Dual LDO Outputs (300mA/300mA)
Ultra-low Quiescent Current 27μA/LDOHigh Output Accuracy 2%Short Circuit Protection
Thermal Shutdown ProtectionCurrent Limit Protection
Short Circuit Thermal Folded Back ProtectionTiny TSOT-23-6 and 8-Lead WDFN PackageRoHS Compliant and 100% Lead (Pb)-Free
Applications
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Ordering Information
RT9011-Package TypeJ6 : TSOT-23-6QW : WDFN-8L 2x2 (W-Type)Operating Temperature RangeP : Pb Free with Commercial StandardG : Green (Halogen Free with Commer- cial Standard)Output Voltage : VOUT1/VOUT2CM : 1.20V/2.80V, FM : 1.50V/2.80VGK : 1.80V/2.60V, GS : 1.80V/3.30VJG : 2.50V/1.80V, JM : 2.50V/2.80VJP : 2.50V/3.00V, JS : 2.50V/3.30VJN : 2.50V/2.85V, MG : 2.80V/1.80VMM : 2.80V/2.80V, NN : 2.85V/2.85VMS : 2.80V/ 3.30V, PG : 3.00V/1.80VMP : 2.80V/3.00V, PP : 3.00V/3.00VSS : 3.30V/3.30V, SQ : 3.30V/3.10VBM : 1.30V/2.80V
CDMA/GSM Cellular HandsetsBattery-Powered Equipment
Laptop, Palmtops, Notebook ComputersHand-Held InstrumentsPCMCIA Cards
Portable Information Appliances
Pin Configurations
(TOP VIEW)
VOUT1VIN6152EN143VINEN1EN2NC
123489765VOUT1VOUT2NCGND
VOUT2GNDEN2
TSOT-23-6
WDFN-8L 2x2
Note : There is no pin1 indicator on top mark for TSOT-23-6type, and pin 1 will be lower left pin when reading top markfrom left to right.
Note :
Richtek Pb-free and Green 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.`100% matte tin (Sn) plating.DS9011-05 August 2007
Marking Information
For marking information, contact our sales representativedirectly or through a Richtek distributor located in yourarea, otherwise visit our website for detail.
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RT9011
Typical Application Circuit
VIN
CIN1uFPreliminary
VINVOUT1RT9011Chip EnableEN1VOUT2EN2GNDCOUT21uFVOUT2
COUT11uFVOUT1
Functional Pin DescriptionPin No. RT9011-□□PQW RT9011-□□PJ6 1 2 3 5 7 8 4, 6 Exposed Pad (9) Pin Name Pin Function 5 VIN Supply Input. 4 3 EN1 EN2 Chip Enable1 (Active High). Chip Enable2 (Active High). 2 GND Common Ground. 1 VOUT2 Channel 2 Output Voltage. 6 VOUT1 Channel 1 Output Voltage. -- -- NC GND No Internal Connection. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. Available Voltage VersionCode Voltage Code C B F W G D Y H E J K 1.2 1.3 1.5 1.6 1.8 1.85 1.9 2 2.1 2.5 2.6 T L M N V P Q R S -- -- 3.2 3.3 -- -- Voltage 2.65 2.7 2.8 2.85 2.9 3 3.1 www.richtek.com
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Preliminary
Function Block Diagram
EN1
0.2uAShutdownandLogic ControlVIN
RT9011
VREF-+MOS DriverVOUT1
Current-Limitand ThermalProtectionGND
ErrorAmplifierEN20.2uAShutdownandLogic ControlVREF-+MOS DriverVOUT2
Current-Limitand ThermalProtectionGND
ErrorAmplifierDS9011-05 August 2007
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RT9011
z
Preliminary
Absolute Maximum Ratings (Note 1)
Supply Input Voltage------------------------------------------------------------------------------------------------------zOther I/O Pin Voltages---------------------------------------------------------------------------------------------------zPower Dissipation, PD @ TA = 25°C
TSOT23-6-------------------------------------------------------------------------------------------------------------------WDFN-6L 2x2--------------------------------------------------------------------------------------------------------------zPackage Thermal Resistance (Note 4)
TSOT23-6, θJA--------------------------------------------------------------------------------------------------------------WDFN-6L 2x2, θJA---------------------------------------------------------------------------------------------------------zLead Temperature (Soldering, 10 sec.)-------------------------------------------------------------------------------zStorage Temperature Range--------------------------------------------------------------------------------------------zESD Susceptibility (Note 2)
HBM (Human Body Mode)----------------------------------------------------------------------------------------------MM (Machine Mode)------------------------------------------------------------------------------------------------------6V6V0.455W0.606W220°C/W165°C/W260°C
−65°C to 150°C2kV200V
Recommended Operating Conditions (Note 3)
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Supply Input Voltage------------------------------------------------------------------------------------------------------2.5V to 5.5VEnable Input Voltage------------------------------------------------------------------------------------------------------0V to 5.5V
Junction Temperature Range--------------------------------------------------------------------------------------------−40°C to 125°CAmbient Temperature Range--------------------------------------------------------------------------------------------−40°C to 85°C
(VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 1μF, TA = 25°C, unless otherwise specified.)
Electrical Characteristics
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 Parameter Symbol Test Conditions Min Typ Max Units VIN VOUT ΔV ΔVLINE VIN = 2.5V to 5.5V 2.5 -- 5.5 V -- 240 330 mV -2 -- +2 % -- -- 0.2 %/V -- -- 0.6 % 330 450 700 mA -- 58 80 μA -- -- 1 μA 1.5 -- -- V -- -- 0.4 -- 100 -- ppm/°C VDROP IOUT = 300mA IOUT = 1mA VIN = (VOUT + 0.3V) to 5.5V or VIN > 2.5V, whichever is larger RLOAD = 1Ω VEN > 1.5V VEN < 0.4V VIN = 2.5V to 5.5V, Power On VIN = 2.5V to 5.5V, Shutdown 1.2 -- 3.6 V ΔVLOAD 1mA < IOUT< 300mA IQ IQ_SD VIH VIL TSD ΔTSD -- 170 -- °C -- 40 -- °C
To be continued
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Preliminary
RT9011
-- -- -- -- -- -- 65 60 50 65 50 50 -- -- -- -- -- -- dB dB dB dB dB dB Parameter Symbol Test Conditions Min Typ Max Units PSRR ILOAD = 10mA f =100Hz PSRR f =1kHz f =10kHz PSRR ILOAD = 150mA f =100Hz PSRR f =1kHz f =10kHz 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 theoperational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extendedperiods 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. θJA is measured in the natural convection at TA = 25°C 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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RT9011
Preliminary
Typical Operating Characteristics
Output Voltage vs. Temperature
1.9
3.4
Output Voltage vs. Temperature
RT9011-GS, VOUT2RT9011-GS, VOUT1Output Voltage (V)Output Voltage (V)1.853.35
1.83.3
1.753.25
1.7-50
-25
0
25
50
75
100
125
3.2-50
-25
0
25
50
75
100
125
Temperature(°C)Temperature(°C)
Quiescent Current vs. Temperature
70
Dropout Voltage vs. Load Current
350300
Quiescent Current (uA)65
Dropout Voltage (mV)RT9011-GSVIN = VEN = 4.3VCIN = COUT1 = COUT2 = 1uF/X7RRT9011-GS, VOUT2TJ = 125°CTJ = 25°C25020015010050
60
TJ = -40°C55
50-50
-25
0
25
50
75
100
125
00
50
100
150
200
250
300
Temperature(°C)Load Current (mA)
PSRR
20
Power-On
RT9011-FM
Both ILOAD = 10mA
ILOAD = 100mAILOAD = 50mA0
RT9011-FM, VOUT1VIN = 4.3V ± 0.1VCIN = COUT1 = COUT2 = 1uF/X7RPSRR (dB)-20
VEN(5V/Div)VOUT1(1V/Div)VOUT2(2V/Div)POR(5V/Div)
Time (10μs/Div)
-40
ILOAD = 10mA-60
-80
0.01 0.1 1 10k 100k 1000k101001000100001000001000000
Frequency (Hz)(Hz)
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Preliminary
RT9011
Line Transient ResponseRT9011-GS, Both ILOAD = 10mAVIN = 3.8V to 4.8V
Line Transient ResponseRT9011-GS, Both ILOAD = 1mAVIN = 3.8V to 4.8V
VIN4.8(V)
3.8
VIN4.8(V)
3.8
VOUT2(10mV/Div)VOUT1(10mV/Div)
VOUT2(10mV/Div)VOUT1(10mV/Div)
Time (100μs/Div)Time (100μs/Div)
Line Transient ResponseRT9011-GS, Both ILOAD = 50mAVIN = 3.8V to 4.8V
Line Transient ResponseRT9011-GS, Both ILOAD = 100mAVIN = 3.8V to 4.8V
VIN4.8(V)
3.8
VIN4.8(V)
3.8
VOUT2(10mV/Div)VOUT1(10mV/Div)
VOUT2(10mV/Div)VOUT1(10mV/Div)
Time (100μs/Div)Time (100μs/Div)
Load Transient ResponseRT9011-GS, ILOAD = 10mA to 50mAVIN = VEN = 4.3V
CIN = COUT1 = COUT2 = 1uF/X7R
Load Transient Response
RT9011-GS, ILOAD = 10mA to 100mAVIN = VEN = 4.3V
CIN = COUT1 = COUT2 = 1uF/X7R
IOUT
(50mA/Div)VOUT1(20mV/Div)VOUT2(20mV/Div)
Time (250μs/Div)
IOUT
(100mA/Div)VOUT1(20mV/Div)VOUT2(20mV/Div)
Time (250μs/Div)
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RT9011
Start Up
RT9011-FM, VIN = 5VIOUT1 = IOUT2 = 50mA
Preliminary
EN Pin Shutdown Response
RT9011-FM, VIN = 5VIOUT1 = IOUT2 = 50mA
(5V/Div)
VEN
VOUT2
(5V/Div)
VEN
VOUT2
VOUT1
VOUT1
(1V/Div)
Time (5μs/Div)
(1V/Div)
Time (50μs/Div)
Noise
RT9011-GS, ILOAD = 50mAVIN = VEN = 4.5V(By battery)300
CIN = COUT1 = COUT2 = 1uF/X7R200
Noise
RT9011-GS, No LOAD
VIN = VEN = 4.5V(By battery)150
CIN = COUT1 = COUT2 = 1uF/X7R100
Noise (μV/Div)Noise (μV/Div)1000-100-200-300
500-50-100-150
Time (10ms/Div)
Time (10ms/Div)
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Preliminary
Applications Information
Like any low-dropout regulator, the external capacitors usedwith the RT9011 must be carefully selected for regulatorstability and performance. Using a capacitor whose valueis > 1μF on the RT9011 input and the amount of capacitancecan be increased without limit. The input capacitor mustbe located a distance of not more than 0.5 inch from theinput pin of the IC and returned to a clean analog ground.Any good quality ceramic or tantalum can be used for thiscapacitor. The capacitor with larger value and lower ESR(equivalent series resistance) provides better PSRR andline-transient response.
The output capacitor must meet both requirements forminimum amount of capacitance and ESR in all LDOsapplication. The RT9011 is designed specifically to workwith low ESR ceramic output capacitor in space-savingand performance consideration. Using a ceramic capacitorwhose value is at least 1μF with ESR is > 20mΩ on theRT9011 output ensures stability. The RT9011 still workswell with output capacitor of other types due to the widestable ESR range. Figure 1. shows the curves of allowableESR range as a function of load current for various outputcapacitor values. Output capacitor of larger capacitancecan reduce noise and improve load transient response,stability, and PSRR. The output capacitor should be locatednot more than 0.5 inch from the VOUT pin of the RT9011and returned to a clean analog ground.
Thermal Considerations
RT9011
Thermal protection limits power dissipation in RT9011.When the operation junction temperature exceeds 170°C,the OTP circuit starts the thermal shutdown function andturns the pass element off. The pass element turn on againafter the junction temperature cools by 40°C. RT9011lowers its OTP trip level from 170°C to 110°C when outputshort circuit occurs (VOUT < 0.4V) as shown in Figure 2.It limits IC case temperature under 100°C and providesmaximum safety to customer while output short circuitoccurring.
VOUT Short to GND
0.4VVOUT
IOUT
TSD
°170 C110 C°OTP Trip Point°110 CIC Temperature80 C°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 absolutemaximum operation junction temperature 125°C. Thepower dissipation definition in device is :PD = (VIN-VOUT) x IOUT + VIN x IQ
RReeggionn of fStabble CESSRΩ))OUUTTio o Stale CO ER ((Ω10
RT9014-FM, VIN = 5VCIN = COUT1 =COUT2 = 1uF/X7RUnstable Range1
0.1
Stable Range0.01
Simulation Verify0.001
0
50
100
150
200
250
300
The maximum power dissipation depends on the thermalresistance of IC package, PCB layout, the rate ofsurroundings airflow and temperature difference betweenjunction to ambient. The maximum power dissipation canbe calculated by following formula :PD(MAX) = ( TJ(MAX) - TA ) /θJA
Where TJ(MAX) is the maximum operation junctiontemperature 125°C, TA is the ambient temperature and theθJA is the junction to ambient thermal resistance.
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Load Current (mA)
Figure 1. Stable Cout ESR Range
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RT9011
Preliminary
For recommended operating conditions specification ofRT9011, where TJ(MAX) is the maximum junctiontemperature of the die (125°C) and TA is the operatedambient temperature. The junction to ambient thermalresistance (θJA is layout dependent) for TSOT-23-6 packageis 220°C/W and WDFN-8L 2x2 is 165°C/W on the standardJEDEC 51-3 single-layer thermal test board. The maximumpower dissipation at TA = 25°C can be calculated byfollowing formula :
PD(MAX) = ( 125°C - 25°C ) / 220 = 0.455 W for TSOT-23-6packages
PD(MAX) = ( 125°C - 25°C ) / 165 = 0.606 W forWDFN-8L 2x2 packages
The maximum power dissipation depends on operatingambient temperature for fixed TJ(MAX) and thermalresistance θJA. For RT9011 packages, the Figure 3 of de-rating curves allows the designer to see the effect of risingambient temperature on the maximum power allowed.
Power Dissipation vs. Ambient Temperature
0.80.7
Power Dissipation (W)0.60.50.40.30.20.100
25
WDFN-8L 2x2TSOT-23-65075100125
Ambient Temperature(°C)
Figure 3. Derating Curves for RT9011 Packages
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Preliminary
Outline Dimension
RT9011
H
DLCBbAA1
eSymbol Dimensions In Millimeters Dimensions In Inches 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 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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元器件交易网www.cecb2b.comRT9011PreliminaryDD2LEE2SEE DETAIL A1eAA1A3b2121DETAIL APin #1 ID and Tie Bar Mark OptionsNote : The configuration of the Pin #1 identifier is optional,but must be located within the zone indicated.Symbol Dimensions In Millimeters Dimensions In Inches 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 0.012 0.016
W-Type 8L DFN 2x2 Package
Richtek Technology Corporation
Headquarter
5F, No. 20, Taiyuen Street, Chupei CityHsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
Richtek Technology Corporation
Taipei Office (Marketing)
8F, No. 137, Lane 235, Paochiao Road, Hsintien CityTaipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465Email: marketing@richtek.com
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