RT9193(芯片资料).pdf-资料库

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RT9193 300mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator General Description 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 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, WDFN-6L 2x2 and MSOP-8 packages. Ordering Information RT9193- Features Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically 50μμμμμs) < 0.01μμμμμA 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 1μμμμμF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available 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 Package Type U5 : SC-70-5 B : SOT-23-5 QW : WDFN-6L 2x2 (W-Type) F : MSOP-8 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) Output Voltage 15 : 1.5V 16 : 1.6V : 49 : 4.9V 50 : 5.0V 1H : 1.85V 2H : 2.85V 4G : 4.75V 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. 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. Typical Application Circuit VIN CIN 1uF/X7R RT9193 VOUT VIN GND Chip Enable EN BP VOUT COUT 1uF/X7R CBP 22nF DS9193-10 September 2007 www.richtek.com 1

RT9193 Pin Configurations VIN GND EN 1 2 3 5 4 VOUT BP SC-70-5/SOT-23-5 Functional Pin Description Pin Name Pin Function (TOP VIEW) EN GND VIN 1 2 3 6 5 4 BP NC VOUT 7 NC VIN NC VOUT 2 3 4 8 7 6 5 NC EN BP GND WDFN-6L 2x2 MSOP-8 EN BP GND VOUT VIN 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. Reference Noise Bypass. Ground . Output Voltage. Power Input Voltage. Function Block Diagram EN BP Quick Start VREF Shutdown and Logic Control + - Error Amplifier MOS Driver Current-Limit and Thermal Protection VIN VOUT GND www.richtek.com 2 DS9193-10 September 2007

RT9193 Absolute Maximum Ratings (Note 1) Supply Input Voltage------------------------------------------------------------------------------------------------------ 6V Power Dissipation, PD @ TA = 25°C SC-70-5 ---------------------------------------------------------------------------------------------------------------------- 300mW SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 400mW WDFN-6L 2x2 -------------------------------------------------------------------------------------------------------------- 606mW MSOP-8 --------------------------------------------------------------------------------------------------------------------- 625mW Package Thermal Resistance (Note 4) SOT-70-5, θJA --------------------------------------------------------------------------------------------------------------- 333°C/W SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W WDFN-6L 2x2, θJA --------------------------------------------------------------------------------------------------------- 165°C/W MSOP-8 θJA ---------------------------------------------------------------------------------------------------------------- 160°C/W Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 2) HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V Recommended Operating Conditions (Note 3) Supply Input Voltage------------------------------------------------------------------------------------------------------ 2.5V to 5.5V EN Input Voltage ----------------------------------------------------------------------------------------------------------- 0V to 5.5V Junction Temperature Range-------------------------------------------------------------------------------------------- Ambient Temperature Range-------------------------------------------------------------------------------------------- Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1μF, CBP = 22nF, TA = 25°C, unless otherwise specified) −40°C to 125°C −40°C to 85°C Parameter Output Voltage Accuracy Current Limit Quiescent Current Dropout Voltage (Note 5) Line Regulation Load Regulation Standby Current EN Input Bias Current EN Threshold Logic-Low Voltage VIL Logic-High Voltage VIH Output Noise Voltage eNO DS9193-10 September 2007 Symbol ΔVOUT ILIM IQ VDROP ΔVLINE Test Conditions IOUT = 1mA RLOAD = 1Ω VEN ≥ 1.2V, IOUT = 0mA IOUT = 200mA, VOUT > 2.8V IOUT = 300mA, VOUT > 2.8V VIN = (VOUT + 1V) to 5.5V, IOUT = 1mA ΔVLOAD 1mA < IOUT < 300mA ISTBY IIBSD VEN = GND, Shutdown VEN = GND or VIN VIN = 3V to 5.5V, Shutdown VIN = 3V to 5.5V, Start-Up 10Hz to 100kHz, IOUT = 200mA COUT = 1μF Min −2 360 -- -- -- -- -- -- -- 1.2 -- Typ Max Units -- 400 90 +2 -- 130 % mA μA 170 220 -- -- 0.01 0 -- -- 200 300 0.3 0.6 1 100 0.4 -- mV % % μA nA V 100 -- μVRMS To be continued www.richtek.com 3

RT9193 Parameter Symbol Test Conditions Power Supply Rejection Rate Thermal Shutdown Temperature Thermal Shutdown Temperature f = 100Hz f = 10kHz PSRR COUT = 1μF, IOUT = 10mA TSD ΔTSD Min -- -- -- -- Typ Max Units −70 −50 165 30 -- -- -- -- dB °C °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. θJA is measured in the natural convection at TA = 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 DS9193-10 September 2007

Typical Operating Characteristics Output Voltage vs. Temperature RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R RT9193 Quiescent Current vs. Temperature RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R ) A u ( t n e r r u C t n e c s e u Q i 95 90 85 80 75 70 65 60 1.8 1.7 1.6 1.5 1.4 1.3 1.2 300 250 200 150 100 50 0 1.5 1.25 1 0.75 0.5 ) V ( e g a t l o V t u p t u O ) V m ( e g a t l o V t u o p o r D ) V ( l d o h s e r h T n w o d t u o h S n P N E i -50 -25 25 50 0 (°C) Temperature 75 100 125 -50 -25 25 50 0 (°C) Temperature 75 100 125 Dropout Voltage vs. Load Current RT9193-33CB CIN = COUT = 1uF TJ = 125°C TJ = 25°C TJ = -40°C 0 0.05 0.15 0.1 0.2 Load Current (A) 0.25 0.3 ) B d ( R R S P 20 0 -20 -40 -60 -80 PSRR VIN = 4V to 5V CIN = COUT = 1uF, X7R ILoad = 100mA ILoad = 10mA 10 0.01 100 0.1 1K 1 10K 10 Frequency (kHz) (Hz) 100K 100 1M 1000 EN Pin Shoutdown Threshold vs. Temperature 1.75 RT9193-15CU5 VIN = 3.3V CIN = COUT = 1uF X7R EN Pin Shutdown Response VIN = 5V CIN = COUT = 1uF RT9193-28CU5 No Load 10 5 0 2 1 0 e g a t l o V n P N E i ) V ( e g a t l o V t u p u O t ) V ( -50 -25 25 0 Temperature 50 (°C) 75 100 125 Time (500μs/Div) DS9193-10 September 2007 www.richtek.com 5

RT9193 Load Transient Response VIN = 5V, VOUT = 2.8V CIN = COUT = 1uF ILoad = 1mA to 60mA t n e r r u C d a o L ) A m ( e g a t l o V t ) V m ( n o i t t u p u O i a v e D Load Transient Response VIN = 5V, VOUT = 2.8V CIN = COUT = 1uF ILoad = 1mA to 250mA 400 200 0 50 0 -50 t n e r r u C d a o L ) A m ( e g a t l o V t ) V m ( n o i t t u p u O i a v e D e g a t l o V ) V ( n o i t t u p n I i a v e D e g a t l o V t ) V m ( n o i t t u p u O i a v e D 100 50 0 20 0 -20 6 5 4 10 0 -10 Time (500μs/Div) Time (500μs/Div) Line Transient Response VIN = 4V to 5V COUT = 1uF RT9193-25CB ILoad = 1mA e g a t l o V ) V ( n o i t t u p n I i a v e D e g a t l o V t ) V m ( n o i t t u p u O i a v e D Line Transient Response VIN = 4V to 5V COUT = 1uF RT9193-25CB ILoad = 100mA 6 5 4 10 0 -10 Time (50μs/Div) Noise Time (100μs/Div) Noise VIN = 4.5V CIN = COUT = 1uF, X7R RT9193-30CB ILoad = 50mA VIN = 4.5V CIN = COUT = 1uF, X7R RT9193-15CU5 ILoad = 50mA 200 100 0 -100 -200 ) V μ ( e s o N i 200 100 0 -100 -200 ) V μ ( e s o N i f = 10Hz to 100kHz Time (10ms/Div) f = 10Hz to 100kHz Time (10ms/Div) www.richtek.com 6 DS9193-10 September 2007

RT9193 Start Up VIN = 5V CIN = COUT = 1uF RT9193-28CU5 No Load 10 5 0 2 1 0 Time (10μs/Div) e g a t l i o V n P N E ) V ( e g a t l o V t t u p u O ) V ( DS9193-10 September 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 ) Ω ( R S E T U O C 10 10.00 1 1.00 0.10 0.01 0.00 Instable Stable Simulation Verify RT9193-15CU5 CIN = COUT = 1uF, X7R 0 50 150 200 100 Load Current (mA) 250 300 Figure 1 Bypass Capacitor and Low Noise 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. Enable Function 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 = (VIN−VOUT) x IOUT + VIN x IQ 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 ) /θJA Where TJ(MAX) is the maximum operation junction temperature 125°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. www.richtek.com 8 DS9193-10 September 2007

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