View RT9011_4100338.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 27A 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 165C to 110C 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 27A/LDO 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
Pin Configurations
(TOP VIEW)
VOUT1 VIN 6 1 5 2 EN1 4 3
VIN 1 EN1 2 EN2 3 NC 4
8
9
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. DS9011-05 August 2007
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.
www.richtek.com 1
GND
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-PQW RT9011-PJ6 1 2 3 5 7 8 4, 6 Exposed Pad (9) 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 Internal Connection. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 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 ---
www.richtek.com 2
DS9011-05 August 2007
Preliminary Function Block Diagram
EN1 0.2uA Shutdown and Logic Control VIN
RT9011
VREF
-
+
MOS Driver VOUT1 Current-Limit and Thermal Protection GND
Error Amplifier
EN2
0.2uA
Shutdown and Logic Control VREF
-
+
MOS Driver VOUT2 Current-Limit and Thermal Protection GND
Error Amplifier
DS9011-05 August 2007
www.richtek.com 3
RT9011
Absolute Maximum Ratings
Preliminary
(Note 1) 6V 6V 0.455W 0.606W 220C/W 165C/W 260C -65C to 150C 2kV 200V
Supply Input Voltage -----------------------------------------------------------------------------------------------------Other I/O Pin Voltages --------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25C TSOT23-6 ------------------------------------------------------------------------------------------------------------------WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 4) TSOT23-6, JA -------------------------------------------------------------------------------------------------------------WDFN-6L 2x2, JA --------------------------------------------------------------------------------------------------------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 -------------------------------------------------------------------------------------------- -40C to 125C Ambient Temperature Range -------------------------------------------------------------------------------------------- -40C to 85C
(VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 1F, TA = 25C, 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 A A V ppm/C C C
VLOAD 1mA < IOUT< 300mA
IQ_SD VIH VIL TSD TSD
To be continued
www.richtek.com 4
DS9011-05 August 2007
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. JA is measured in the natural convection at T A = 25C 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.
DS9011-05 August 2007
www.richtek.com 5
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)
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 (C)
Temperature (C)
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 = 125C TJ = 25C
250 200 150 100 50
60
TJ = -40C
55
50 -50 -25 0 25 50 75 100 125
0 0 50 100 150 200 250 300
Temperature (C)
Load Current (mA)
20
PSRR
RT9011-FM, VOUT1 VIN = 4.3V 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 (10s/Div)
-40
ILOAD = 10mA
-60
-80
0.01 10
0.1 100
1 1000
10k 10000
100k 100000
1000k 1000000
Frequency (Hz) (Hz)
www.richtek.com 6
DS9011-05 August 2007
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)
VOUT2 (10mV/Div) VOUT1 (10mV/Div)
Time (100s/Div)
Time (100s/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)
VOUT2 (10mV/Div) VOUT1 (10mV/Div)
Time (100s/Div)
Time (100s/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 (250s/Div)
IOUT (100mA/Div) VOUT1 (20mV/Div) VOUT2 (20mV/Div) Time (250s/Div)
DS9011-05 August 2007
www.richtek.com 7
RT9011
Start Up
RT9011-FM, VIN = 5V IOUT1 = IOUT2 = 50mA
Preliminary
EN Pin Shutdown Response
RT9011-FM, VIN = 5V IOUT1 = IOUT2 = 50mA
(5V/Div)
VEN V OUT2
(5V/Div)
V EN
VOUT2 V OUT1 V OUT1
(1V/Div) Time (5s/Div)
(1V/Div) Time (50s/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 (V/Div)
Noise (V/Div)
100 0 -100 -200 -300
50 0 -50 -100 -150
Time (10ms/Div)
Time (10ms/Div)
www.richtek.com 8
DS9011-05 August 2007
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 > 1F 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 1F 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 170C, 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 40C. RT9011 lowers its OTP trip level from 170C to 110C when output short circuit occurs (VOUT < 0.4V) as shown in Figure 2. It limits IC case temperature under 100C and provides maximum safety to customer while output short circuit occurring.
VOUT Short to GND
0.4V VOUT
IOUT
TSD 170 C 110 C OTP Trip Point 110 C IC Temperature 80 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 absolute maximum operation junction temperature 125C. 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 power dissipation 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 ) /JA Where T J(MAX) is the maximum operation junction temperature 125C, TA is the ambient temperature and the JA is the junction to ambient thermal resistance.
www.richtek.com 9
Load Current (mA)
Figure 1. Stable Cout ESR Range
DS9011-05 August 2007
RT9011
Preliminary
For recommended operating conditions specification of RT9011, where T J(MAX) is the maximum junction temperature of the die (125C) and TA is the operated ambient temperature. The junction to ambient thermal resistance (JA is layout dependent) for TSOT-23-6 package is 220C/W and WDFN-8L 2x2 is 165C/W on the standard JEDEC 51-3 single-layer thermal test board. The maximum power dissipation at TA = 25C can be calculated by following formula : PD(MAX) = ( 125C - 25C ) / 220 = 0.455 W for TSOT-23-6 packages P D(MAX) = ( 125C - 25C ) / 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 JA. 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 (C)
Figure 3. Derating Curves for RT9011 Packages
www.richtek.com 10
DS9011-05 August 2007
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
DS9011-05 August 2007
www.richtek.com 11
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 zone indicated.
Symbol A A1 A3 b D D2 E E2 e L
Dimensions In Millimeters Min 0.700 0.000 0.175 0.200 1.950 1.000 1.950 0.400 0.500 0.300 0.400 Max 0.800 0.050 0.250 0.300 2.050 1.250 2.050 0.650
Dimensions In Inches Min 0.028 0.000 0.007 0.008 0.077 0.039 0.077 0.016 0.020 0.012 0.016 Max 0.031 0.002 0.010 0.012 0.081 0.049 0.081 0.026
W-Type 8L DFN 2x2 Package
Richtek Technology Corporation
Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611
Richtek Technology Corporation
Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com
www.richtek.com 12
DS9011-05 August 2007

▲Up To Search▲

Price & Availability of RT9011

	To Download RT9011 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .