RT mA, Ultra-Low Noise, Ultra-Fast CMOS LDO Regulator. Features. General Description. Applications. Ordering Information RT9193-
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1 RT9193 3mA, 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.1μa in shutdown mode and has fast turn-on time less than μs. The other features include ultra low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the SC-7-, SOT-23-, TSOT-23-, WDFN-6L 2x2 and MSOP-8 packages. Ordering Information RT9193- Note : Richtek products are : Package Type U : SC-7- B : SOT-23- J : TSOT-23- QW : WDFN-6L 2x2 (W-Type) F : MSOP-8 Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Output Voltage 1 : 1.V 16 : 1.6V : 49 : 4.9V :.V 1H : 1.8V 2H : 2.8V 4G : 4.7V (1.V to V with.1v step is available) RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-2. Suitable for use in SnPb or Pb-free soldering processes. Features Ultra Low Noise for RF Application Ultra Fast Response in Line/Load Transient Quick Start-Up (Typically μs) <.1μA Standby Current When Shutdown Low Dropout : 3mA Wide Operating Voltage Ranges : 2.V to.v TTL-Logic-Controlled Shutdown Input Low Temperature Coefficient Current Limiting Protection Thermal Shutdown Protection Only 1μF Output Capacitor Required for Stability High Power Supply Rejection Ratio Custom Voltage Available RoHS Compliant and 1% Lead (Pb)-Free Applications CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments PCMCIA Cards Portable Information Appliances Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Typical Application Circuit V IN C IN 1µF/X7R Chip Enable VIN GND EN RT9193 VOUT BP C OUT 1µF/X7R V OUT C BP 22nF (Option for low noise) Copyright 216 Richtek Technology Corporation. All rights reserved. DS January 216 1
2 Pin Configurations VOUT BP (TOP VIEW) EN GND VIN BP NC VOUT NC VIN NC VOUT NC EN BP GND VIN GND EN SC-7-/SOT-23-/TSOT-23- WDFN-6L 2x2 MSOP-8 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 1k resistor connected to GND when the control signal is floating. BP GND VOUT VIN Reference Noise Bypass. This pin can be floating. For lowest noise performance, connect a 22nF capacitor between the BP and GND pins. Ground. Output Voltage. Power Input Voltage. Function Block Diagram EN Quick Start Shutdown and Logic Control VIN BP V REF + - Error Amplifier MOSFET Driver Current-Limit and Thermal Protection VOUT GND Copyright 216 Richtek Technology Corporation. All rights reserved. 2 DS January 216
3 Absolute Maximum Ratings (Note 1) Supply Input Voltage V Power Dissipation, P T A = 2 C SC mW TSOT-23-/SOT mW WDFN-6L 2x mW MSOP mW Package Thermal Resistance (Note 2) SC-7-, θ JA C/W SC-7-, θ JC C/W TSOT-23-/SOT-23-, θ JA C/W TSOT-23-/SOT-23-, θ JC C/W WDFN-6L 2x2, θ JA C/W WDFN-6L 2x2, θ JC C/W MSOP-8 θ JA C/W MSOP-8 θ JC C/W Junction Temperature C Lead Temperature (Soldering, 1 sec.) C Storage Temperature Range C to 1 C ESD Susceptibility (Note 3) HBM (Human Body Model) kV MM (Machine Model) V Recommended Operating Conditions (Note 4) Supply Input Voltage V to.v EN Input Voltage V to.v Junction Temperature Range C to 12 C Ambient Temperature Range C to 8 C Electrical Characteristics (V IN = V OUT + 1V, C IN = C OUT = 1μF, C BP = 22nF, T A = 2 C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage Accuracy V OUT I OUT = 1mA % Current Limit I LIM R LOAD = ma Quiescent Current I Q V EN 1.2V, I OUT = ma A Dropout Voltage (Note ) V DROP I OUT = 2mA, V OUT > 2.8V 17 2 I OUT = 3mA, V OUT > 2.8V mv Line Regulation V LINE V IN = (V OUT + 1V) to.v, I OUT = 1mA % Load Regulation V LOAD 1mA I OUT 3mA % Standby Current I STBY V EN = GND, Shutdown A Copyright 216 Richtek Technology Corporation. All rights reserved. DS January 216 3
4 Parameter Symbol Test Conditions Min Typ Max Unit EN Input Bias Current I IBSD V EN = GND or VIN -- 1 na EN Threshold Logic-Low V IL V IN = 3V to.v, Shutdown Voltage Logic-High V IH V IN = 3V to.v, Start-Up Output Noise Voltage Power Supply Rejection Rate e NO 1Hz to 1kHz, I OUT = 2mA C OUT = 1 F V RMS f = 1Hz PSRR C OUT = 1 F, I OUT = 1mA f = 1kHz Thermal Shutdown Temperature T SD C Thermal Shutdown Temperature TSD C Note 1. Stresses beyond those listed Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and 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 may affect device reliability. Note 2. θ JA is measured at T A = 2 C on a low effective thermal conductivity single-layer test board per JEDEC 1-3. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note. The dropout voltage is defined as V IN V OUT, which is measured when V OUT is V OUT(NORMAL) 1mV. V db Copyright 216 Richtek Technology Corporation. All rights reserved. 4 DS January 216
5 Typical Operating Characteristics Output Voltage (V) Output Voltage vs. Temperature RT9193-1xU VIN = 3.3V CIN = COUT = 1μF X7R Quiescent Current (µa) Quiescent Current vs. Temperature RT9193-1xU VIN = 3.3V CIN = COUT = 1μF X7R Temperature ( C) Temperature ( C) Dropout Voltage (mv) Dropout Voltage vs. Load Current RT xB CIN = COUT = 1μF TJ = 2 C TJ = 12 C TJ = -4 C PSRR (db) VIN = 4V to V CIN = COUT = 1μF, X7R PSRR ILoad = 1mA ILoad = 1mA Load Current (A) K 1 1K 1K 1 1M Frequency (khz) (Hz) EN Pin Shutdown Threshold (V) 1 EN Pin Shutdown Threshold vs. Temperature RT9193-1xU VIN = 3.3V CIN = COUT = 1μF X7R Temperature ( C) EN Pin Voltage (V) Output Voltage (V) EN Pin Shutdown Response VIN = V CIN = COUT = 1μF Time (μs/div) RT xU No Load Copyright 216 Richtek Technology Corporation. All rights reserved. DS January 216
6 Load Transient Response Load Transient Response Load Current (ma) 1 VIN = V, VOUT = 2.8V CIN = COUT = 1μF ILOAD = 1mA to 6mA Load Current (ma) 4 2 VIN = V, VOUT = 2.8V CIN = COUT = 1μF ILOAD = 1mA to 2mA Output Voltage Deviation (mv) 2-2 Output Voltage Deviation (mv) - Time (μs/div) Time (μs/div) Line Transient Response Line Transient Response Input Voltage Deviation (V) 6 4 VIN = 4V to V COUT = 1μF RT9193-2xB ILOAD = 1mA Input Voltage Deviation (V) 6 4 VIN = 4V to V COUT = 1μF RT9193-2xB ILOAD = 1mA Output Voltage Deviation (mv) 1-1 Output Voltage Deviation (mv) 1-1 Time (μs/div) Time (1μs/Div) Noise Noise VIN = 4.V CIN = COUT = 1μF, X7R RT9193-3xB ILOAD = ma VIN = 4.V CIN = COUT = 1μF, X7R RT9193-1xU ILOAD = ma 2 2 Noise (μv) 1-1 Noise (μv) Time (1ms/Div) f = 1Hz to 1kHz Time (1ms/Div) f = 1Hz to 1kHz Copyright 216 Richtek Technology Corporation. All rights reserved. 6 DS January 216
7 Start Up EN Pin Voltage (V) 1 VIN = V CIN = COUT = 1μF RT xU No Load Output Voltage (V) 2 1 Time (1μs/Div) Copyright 216 Richtek Technology Corporation. All rights reserved. DS January 216 7
8 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. 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 >1mΩ 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. inch from the V OUT pin of the RT9193 and returned to a clean analog ground. Region of Stable C OUT ESR vs. Load Current 1 Instable 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.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 V IN 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 16 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 3 C. For continue operation, do not exceed absolute maximum operation junction temperature 12 C. The power dissipation definition in device is : COUT ESR ( Ω ) Stable Load Current (ma) Figure 1 RT9193-1xU CIN = COUT = 1μF, X7R P D = (V IN V OUT ) x I OUT + V IN x I Q 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 : P D(MAX) = ( T J(MAX) T A ) /θ JA Where T J(MAX) is the maximum operation junction temperature 12 C, T A is the ambient temperature and the θ JA is the junction to ambient thermal resistance. Copyright 216 Richtek Technology Corporation. All rights reserved. 8 DS January 216
9 For recommended operating conditions specification of RT9193, where T J(MAX) is the maximum junction temperature of the die (12 C) and T A is the maximum ambient temperature. The junction to ambient thermal resistance (θ JA is layout dependent) for TSOT-23-/ SOT-23- package is 2 C/W, SC-7- package is 333 C/W, WDFN-6L 2x2 package is 16 C/W and MSOP- 8 package is 16 C/W on standard JEDEC 1-3 thermal test board. The maximum power dissipation at T A = 2 C can be calculated by following formula : P D(MAX) = (12 C 2 C) / 333 = 3mW for SC-7- P D(MAX) = (12 C 2 C) / 2 = 4mW for TSOT-23-/SOT-23- P D(MAX) = (12 C 2 C) / 16 = 66mW for WDFN-6L 2x2 P D(MAX) = (12 C 2 C) / 16 = 62mW for MSOP-8 The maximum power dissipation depends on operating ambient temperature for fixed T J(MAX) and thermal resistance θ JA. 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. 7 MSOP-8 WDFN-6L 2x2 6 Power Dissipation (mw) TSOT-23-/ SOT-23- SC Ambient Temperature ( C) Figure 2. Derating Curve for Packages Copyright 216 Richtek Technology Corporation. All rights reserved. DS January 216 9
10 Outline Dimension D H L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e.6.26 H L SC-7- Surface Mount Package Copyright 216 Richtek Technology Corporation. All rights reserved. 1 DS January 216
11 D H L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e H L TSOT-23- Surface Mount Package Copyright 216 Richtek Technology Corporation. All rights reserved. DS January
12 D H L C B b A A1 e Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e H L SOT-23- Surface Mount Package Copyright 216 Richtek Technology Corporation. All rights reserved. 12 DS January 216
13 D D2 L E E2 1 SEE DETAIL A A A1 A3 e b 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 A A b D D E E e.6.26 L W-Type 6L DFN 2x2 Package Copyright 216 Richtek Technology Corporation. All rights reserved. DS January
14 D L E E1 e A b A1 A2 Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A A b D e.6.26 E E L Lead MSOP Plastic Package Richtek Technology Corporation 14F, No. 8, Tai Yuen 1 st Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)26789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. DS January
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