RT9193 300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator General Description Features The RT9193 is designed for portable RF and wireless applications with demanding performance and space requirements. The RT9193 performance is optimized for battery-powered systems to deliver ultra low noise and low quiescent current. A noise bypass pin is available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9193 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless z Ultra-Low-Noise for RF Application z devices. The RT9193 consumes less than 0.01μA in shutdown mode and has fast turn-on time less than 50μs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the 5-lead of SC-70, SOT-23 and WDFN-6L 2x2 packages. z Ultra-Fast Response in Line/Load Transient μs) Quick Start-Up (Typically 50μ < 0.01μ μA Standby Current When Shutdown Low Dropout : 220mV @ 300mA Wide Operating Voltage Ranges : 2.5V to 5.5V TTL-Logic-Controlled Shutdown Input Low Temperature Coefficient Current Limiting Protection Thermal Shutdown Protection Only 1μ μF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available RoHS Compliant and 100% Lead (Pb)-Free z z z z z z z z z z z Applications z Ordering Information z RT9193- z Package Type U5 : SC-70-5 B : SOT-23-5 QW : WDFN-6L 2x2 (W-Type) z z z CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances Operating Temperature Range Marking Information P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- For marking information, contact our sales representative cial Standard) directly or through a RichTek distributor located in your Output Voltage area, otherwise visit our website for detail. 15 : 1.5V 16 : 1.6V : Pin Configurations 49 : 4.9V (TOP VIEW) 50 : 5.0V 1H : 1.85V 2H : 2.85V 1 5 VOUT VIN 4G : 4.75V Note : GND 2 EN 3 EN GND VIN 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. 4 1 6 2 5 3 4 BP NC VOUT BP SC-70-5/SOT-23-5 WDFN-6L 2x2 `100% matte tin (Sn) plating. DS9193-09 March 2007 www.richtek.com 1 RT9193 Typical Application Circuit RT9193 VIN CIN 1uF/X7R Chip Enable VIN VOUT GND COUT VOUT 1uF/X7R EN BP CBP 22nF Functional Pin Description Pin Name EN Pin Function Chip Enable (Active High). Note that this pin is high impedance. There should be a pull low 100kΩ resistor connected to GND when the control signal is floating. BP Reference Noise Bypass GND Ground VOUT Output Voltage VIN Power Input Voltage Function Block Diagram EN Shutdown and Logic Control Quick Start BP VIN VREF + MOS Driver Error Amplifier VOUT Current-Limit and Thermal Protection GND www.richtek.com 2 DS9193-09 March 2007 RT9193 Absolute Maximum Ratings z z z z z z z (Note 1) Supply Input Voltage -----------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C SC-70-5 ---------------------------------------------------------------------------------------------------------------------SOT-23-5 -------------------------------------------------------------------------------------------------------------------WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 4) SOT-70-5, θJA --------------------------------------------------------------------------------------------------------------SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------Junction Temperature ----------------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------Storage Temperature Range -------------------------------------------------------------------------------------------ESD Susceptibility (Note 2) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------MM (Machine Mode) ------------------------------------------------------------------------------------------------------ Recommended Operating Conditions z z z z 6V 300mW 400mW 606mW 333°C/W 250°C/W 165°C/W 150°C 260°C −65°C to 150°C 2kV 200V (Note 3) Supply Input Voltage -----------------------------------------------------------------------------------------------------EN Input Voltage ----------------------------------------------------------------------------------------------------------Junction Temperature Range -------------------------------------------------------------------------------------------Ambient Temperature Range -------------------------------------------------------------------------------------------- 2.5V to 5.5V 0V to 5.5V −40°C to 125°C −40°C to 85°C Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1μF, CBP = 22nF, TA = 25°C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Output Voltage Accuracy ΔVOUT IOUT = 1mA −2 -- +2 % Current Limit ILIM RLOAD = 1Ω 360 400 -- mA Quiescent Current IQ VEN ≥ -- 90 130 μA 170 200 -- 220 300 -- -- 0.3 % Dropout Voltage (Note 5) VDROP 1.2V, IOUT = 0mA IOUT = 200mA, VOUT > 2.8V IOUT = 300mA, VOUT > 2.8V VIN = (VOUT + 1V) to 5.5V, mV Line Regulation ΔVLINE Load Regulation ΔVLOAD 1mA < IOUT < 300mA -- -- 0.6 % Standby Current ISTBY VEN = GND, Shutdown -- 0.01 1 μA EN Input Bias Current IIBSD VEN = GND or VIN -- 0 100 nA VIL VIN = 3V to 5.5V, Shutdown -- -- 0.4 1.2 -- -- -- 100 -- -- −70 -- -- −50 -- -- 165 -- EN Threshold Logic-Low Voltage Logic-High Voltage VIH Output Noise Voltage eNO Power Supply f = 100Hz Rejection Rate f = 10kHz Thermal Shutdown Temperature PSRR TSD IOUT = 1mA VIN = 3V to 5.5V, Start-Up 10Hz to 100kHz, IOUT = 200mA COUT = 1μF COUT = 1μF, IOUT = 10mA V μVRMS dB °C To be continued DS9193-09 March 2007 www.richtek.com 3 RT9193 Parameter Thermal Shutdown Temperature Hysteresis Symbol Test Conditions ΔTSD Min Typ Max Units -- 30 -- °C 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. θ JA is measured in the natural convection at T A = 25°C on a low effective thermal conductivity test board (Single Layer, 1S) 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. www.richtek.com 4 DS9193-09 March 2007 RT9193 Typical Operating Characteristics Output Voltage vs. Temperature 1.8 RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R 90 Quiescent Current (uA) 1.7 Output Voltage (V) Quiescent Current vs. Temperature 95 1.6 1.5 1.4 1.3 85 80 75 70 65 1.2 60 -50 -25 0 25 50 75 100 125 -50 -25 0 Dropout Voltage vs. Load Current 200 TJ = 25°C 150 TJ = -40°C 100 50 -40 ILoad = 100mA 0.15 0.2 0.25 0.3 ILoad = 10mA 10 0.01 100 0.1 1K 1 10K 10 100K 100 Load Current (A) Frequency (kHz) (Hz) EN Pin Shoutdown Threshold vs. Temperature EN Pin Shutdown Response 1.5 RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R EN Pin Voltage (V) 1.75 1.25 Output Voltage (V) EN Pin Shoutdown Threshold (V) -20 -80 0 0.1 125 VIN = 4V to 5V CIN = COUT = 1uF, X7R -60 0.05 100 0 PSRR (dB) Dropout Voltage (mV) TJ = 125°C 0 75 PSRR 20 RT9193-33CB CIN = COUT = 1uF 250 50 Temperature (°C) Temperature (°C) 300 25 1 0.75 10 VIN = 5V CIN = COUT = 1uF 1M 1000 RT9193-28CU5 No Load 5 0 2 1 0 0.5 -50 -25 0 25 50 75 100 125 Time (500μs/Div) Temperature (°C) DS9193-09 March 2007 www.richtek.com 5 RT9193 Load Transient Response ILoad = 1mA to 60mA 50 Output Voltage Deviation (mV) 0 20 0 -20 0 50 0 -50 Line Transient Response Line Transient Response RT9193-25CB ILoad = 1mA 5 4 10 0 -10 6 VIN = 4V to 5V COUT = 1uF RT9193-25CB ILoad = 100mA 5 4 10 0 -10 Time (50μs/Div) Time (100μs/Div) Noise Noise RT9193-30CB ILoad = 50mA VIN = 4.5V CIN = COUT = 1uF, X7R VIN = 4.5V CIN = COUT = 1uF, X7R 200 200 100 100 Noise (μV) Noise (μV) 200 Time (500μs/Div) VIN = 4V to 5V COUT = 1uF 0 -100 -200 RT9193-15CU5 ILoad = 50mA 0 -100 -200 f = 10Hz to 100kHz Time (10ms/Div) www.richtek.com 6 ILoad = 1mA to 250mA VIN = 5V, VOUT = 2.8V 400 CIN = COUT = 1uF Time (500μs/Div) Input Voltage Deviation (V) 6 Load Current (mA) VIN = 5V, VOUT = 2.8V 100 CIN = COUT = 1uF Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage Deviation (V) Output Voltage Deviation (mV) Load Current (mA) Load Transient Response f = 10Hz to 100kHz Time (10ms/Div) DS9193-09 March 2007 RT9193 Output Voltage (V) EN Pin Voltage (V) Start Up 10 VIN = 5V CIN = COUT = 1uF RT9193-28CU5 No Load 5 0 2 1 0 Time (10μs/Div) DS9193-09 March 2007 www.richtek.com 7 RT9193 Applications Information Like any low-dropout regulator, the external capacitors used with the RT9193 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1μF on the RT9193 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 RT9193 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 > 25mΩ on the RT9193 output ensures stability. The RT9193 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 RT9193 and returned to a clean analog ground. Region of Stable COUT ESR vs. Load Current 100.00 100 Instable C OUT ESR (Ω) Stable 0.01 Simulation Verify 100 The RT9193 features an LDO regulator enable/disable function. To assure the LDO regulator will switch on, the EN turn on control level must be greater than 1.2 volts. The LDO regulator will go into the shutdown mode when the voltage on the EN pin falls below 0.4 volts. For to protecting the system, the RT9193 have a quick-discharge function. If the enable function is not needed in a specific application, it may be tied to VIN to keep the LDO regulator in a continuously on state. Thermal Considerations Thermal protection limits power dissipation in RT9193. When the operation junction temperature exceeds 165°C, the OTP circuit starts the thermal shutdown function turn the pass element off. The pass element turn on again after the junction temperature cools by 30°C. For continue operation, do not exceed absolute maximum operation junction temperature 125°C. The power dissipation definition in device is : PD(MAX) = ( TJ(MAX) − TA ) /θJA RT9193-15CU5 CIN = COUT = 1uF, X7R 0.00 50 Enable Function 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 : 1 1.00 0 Connecting a 22nF between the BP pin and GND pin significantly reduces noise on the regulator output, it is critical that the capacitor connection between the BP pin and GND pin be direct and PCB traces should be as short as possible. There is a relationship between the bypass capacitor value and the LDO regulator turn on time. DC leakage on this pin can affect the LDO regulator output noise and voltage regulation performance. PD = (VIN−VOUT) x IOUT + VIN x IQ 10.00 10 0.10 Bypass Capacitor and Low Noise 150 200 Load Current (mA) 250 300 Where T J(MAX) is the maximum operation junction temperature 125°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. Figure 1 www.richtek.com 8 DS9193-09 March 2007 RT9193 For recommended operating conditions specification of RT9193, where T J(MAX) is the maximum junction temperature of the die (125°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for SOT-23-5 package is 250°C/W, SC-70-5 package is 333°C/W and WDFN-6L 2x2 package is 165°C/W on standard JEDEC 51-3 thermal test board. The maximum power dissipation at TA = 25°C can be calculated by following formula : PD(MAX) = (125°C−25°C) / 333 = 300mW (SC-70-5) PD(MAX) = (125°C−25°C) / 250 = 400mW (SOT-23-5) PD(MAX) = (125°C−25°C) / 165 = 606mW (WDFN-6L 2x2) The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θJA. For RT9193 packages, the Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. 700 Power Dissipation (mW) WDFN-6L 2x2 600 500 SOT-23-5 400 SC 70-5 300 200 100 0 0 25 50 75 100 125 150 Ambient Temperature (°C) Figure 2. Derating Curve for Packages DS9193-09 March 2007 www.richtek.com 9 RT9193 Outline Dimension H D L B C b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.800 1.100 0.031 0.044 A1 0.000 0.100 0.000 0.004 B 1.150 1.350 0.045 0.054 b 0.150 0.400 0.006 0.016 C 1.800 2.450 0.071 0.096 D 1.800 2.250 0.071 0.089 e 0.650 0.026 H 0.080 0.260 0.003 0.010 L 0.210 0.460 0.008 0.018 SC-70-5 Surface Mount Package www.richtek.com 10 DS9193-09 March 2007 RT9193 H D L B C b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.889 1.295 0.035 0.051 A1 0.000 0.152 0.000 0.006 B 1.397 1.803 0.055 0.071 b 0.356 0.559 0.014 0.022 C 2.591 2.997 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 SOT-23-5 Surface Mount Package DS9193-09 March 2007 www.richtek.com 11 RT9193 D2 D L E E2 1 e b A A1 SEE DETAIL A 2 1 2 1 A3 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 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 0.350 0.008 0.014 D 1.950 2.050 0.077 0.081 D2 1.000 1.450 0.039 0.057 E 1.950 2.050 0.077 0.081 E2 0.500 0.850 0.020 0.033 e L 0.650 0.300 0.026 0.400 0.012 0.016 W-Type 6L DFN 2x2 Package Richtek Technology Corporation Richtek Technology Corporation Headquarter Taipei Office (Marketing) 5F, No. 20, Taiyuen Street, Chupei City 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Tel: (8862)89191466 Fax: (8862)89191465 Email: [email protected] www.richtek.com 12 DS9193-09 March 2007