RT9187 1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator The RT9187 is a high-performance, 1A LDO regulator, offering extremely high PSRR and ultra-low dropout. Ideal for portable RF and wireless applications with demanding performance and space requirements. A noise reduction pin is also available for further reduction of output noise. Regulator ground current increases only slightly in dropout, further prolonging the battery life. The RT9187 also works with low-ESR ceramic capacitors, reducing the amount of board space necessary for power applications, critical in hand-held wireless devices. The RT9187 consumes less than 0.1μA in shutdown mode and has fast turn-on time less than 40μs. The other features include ultra-low dropout voltage, high output accuracy, current limiting protection, and high ripple rejection ratio. Available in the VDFN-8L 3x3 and SOP-8 (Exposed Pad) package. Ordering Information RT9187(- ) Package Type QV : VDFN-8L 3x3 (V-Type) SP : SOP-8 (Exposed Pad-Option 1) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Note : None : Adjustable Output Fixed Output Voltage Code 10 : 1.0V 11 : 1.1V : 32 : 3.2V 33 : 3.3V 1L : 1.34V Features Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically 40μ μs) <0.1μ μA Standby Current When Shutdown Low Dropout : 240mV at 1A Wide Operating Voltage Ranges : 2.5V to 5.5V TTL-Logic-Controlled Shutdown Input Current Limiting Protection Thermal Shutdown Protection Only 2.2μ μF Output Capacitor Required for Stability High Power Supply Rejection Ratio RoHS Compliant and 100% Lead (Pb)-Free Applications CDMA/GSM Cellular Handsets Battery-Powered Equipment Laptop, Palmtops, Notebook Computers Hand-Held Instruments Mini PCI & PCI-Express Cards PCMCIA & New Cards Portable Information Appliances Marking Information For marking information, contact our sales representative directly or through a RichTek distributor located in your area. Pin Configurations (TOP VIEW) VIN VIN VOUT VOUT 8 1 3 GND General Description 6 4 9 5 2 7 EN NC GND BP/ADJ Richtek products are : ` VDFN-8L 3x3 RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020. ` Suitable for use in SnPb or Pb-free soldering processes. VIN 8 EN 7 GND 6 9 4 5 VIN 2 NC VOUT 3 GND VOUT BP/ADJ SOP-8 (Exposed Pad) DS9187-11 June 2011 www.richtek.com 1 RT9187 Typical Application Circuit VIN VIN CIN 2.2µF VOUT COUT 2.2µF VOUT RT9187 VIN VOUT CIN 2.2µF R1 RT9187 BP Chip Enable VIN EN VOUT COUT 2.2µF ADJ CBP 10nF Chip Enable EN GND GND Figure 1. Fixed Operation R2 Figure 2. Adjustable Operation V OUT = 0.8 x ( 1 + R1 ) Volts R2 Note : The value of R2 should be less than 80k to maintain regulation. Function Pin Description Pin No. Pin Name Pin Function Fixed Output Voltage Adjustable Output Voltage 1 1 VIN Supply Input. 2 2 VIN Supply Input. 3 3 VOUT Regulator Output. 4 4 VOUT Regulator Output. 5 -- BP Noise Reduction. Connecting a 10nF capacitor to GND to reduce output noise. If external feedback resistors are applied, the output voltage will -- 6, 9 (Exposed Pad) 5 ADJ 6, GND 9 (Exposed Pad) be: VOUT = 0.8 × (1+ R1 )V R2 Ground. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. 7 7 NC No Internal Connection. 8 8 EN Enable Input Logic, Active High. When the EN goes to a logic low, the device is in shutdown mode. www.richtek.com 2 DS9187-11 June 2011 RT9187 Function Block Diagram VIN EN EN OTP POR BIAS VREF + Current Limit VOUT ADJ Quick start GND Adjustable VIN EN EN OTP POR BIAS VREF + VOUT Current Limit BP Quick start Fixed DS9187-11 June 2011 GND www.richtek.com 3 RT9187 Absolute Maximum Ratings (Note 1) Supply Input Voltage ---------------------------------------------------------------------------------------------------EN Input Voltage --------------------------------------------------------------------------------------------------------Power Dissipation, PD @ TA = 25°C VDFN-8L 3x3 -------------------------------------------------------------------------------------------------------------SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------------------Package Thermal Resistance (Note 2) VDFN-8L 3x3, θJC -------------------------------------------------------------------------------------------------------VDFN-8L 3x3, θJA -------------------------------------------------------------------------------------------------------SOP-8 (Exposed Pad), θJC -------------------------------------------------------------------------------------------SOP-8 (Exposed Pad), θJA -------------------------------------------------------------------------------------------Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------------------Junction Temperature --------------------------------------------------------------------------------------------------Storage Temperature Range ------------------------------------------------------------------------------------------ESD Susceptibility (Note 3) HBM -----------------------------------------------------------------------------------------------------------------------MM -------------------------------------------------------------------------------------------------------------------------- Recommended Operating Conditions 6V 6V 1.429W 1.33W 8.2°C/W 70°C/W 15°C/W 75°C/W 260°C 150°C −65°C to 150°C 2kV 200V (Note 4) 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, VEN = VIN, CIN = COUT = 2.2μF (Ceramic) & CBP = 10nF, TA = 25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit −2 0 2 % 0.8 -- 4.5 V Output Voltage Accuracy (Fixed Output Voltage) ΔVOUT Output Voltage Range (Adjustable) VOUT_Adj Quiescent Current IQ VEN ≥ VIH, IOUT = 0mA -- 380 500 μA ISTBY VEN ≤ VIL,VIN = 3.3V -- 0.1 1 μA ILIM RLOAD = 0.5Ω, VIN = 3.3V 2 2.8 3 A IOUT = 0.25A -- 60 100 IOUT = 0.5A -- 120 180 IOUT = 1.0A -- 240 360 ΔVLOAD VIN = (VOUT + 0.5V) 10mA < I OUT < 1.0A -- 0.4 -- Logic-Low VIL VIN = 3.3V -- -- 0.6 Logic-High VIH VIN = 3.3V 1.8 -- -- IEN VIN = 3.3V, Enable -- 0.1 1 Standby Current (Note 5) (Note 6) Current Limit Dropout Voltage (Note 7) Load Regulation (Note 8) (Fixed Output Voltage) EN Threshold Voltage Enable Pin Current VDROP IOUT = 10mA (Note 9) mV %/A V μA To be continued www.richtek.com 4 DS9187-11 June 2011 RT9187 Parameter Power Supply Rejection Rate f = 100Hz f = 10kHz Symbol PSRR Test Conditions IOUT = 300mA Min Typ Max -- −60 -- -- −50 -- Unit dB Line Regulation ΔVLINE VIN = (VOUT + 0.5) to 5.5V, I OUT = 1mA -- -- 0.3 % Start-Up Time TStart_Up RLOAD = 3Ω, 1nF ≤ CBP ≤ 0.1μF -- 40 -- μs Thermal Shutdown Temperature TSD -- 170 -- Thermal Shutdown Hysteresis ΔTSD -- 30 -- Reference Voltage Tolerance VREF 0.784 0.8 0.816 V ADJ Pin Current IADJ -- 10 100 nA °C ADJ VADJ = VREF 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. θJA is measured in natural convection at TA = 25°C on a high effective thermal conductivity four-layer test board of JEDEC 51-7 thermal measurement standard. The measurement case position of θJC is on the exposed pad of the package. Note 3. Devices are ESD sensitive. Handling precaution is recommended. Note 4. The device is not guaranteed to function outside its operating conditions. Note 5. Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 6. Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (VEN >1.8V ). Note 7. The dropout voltage is defined as VIN − VOUT, which is measured when VOUT is VOUT(NORMAL) −Σ 100mV. Note 8. Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load regulation in the load range from 10mA to 1.0A. Note 9. Performance at -5°C ≤ TA ≤ 85°C is assured by design. DS9187-11 June 2011 www.richtek.com 5 RT9187 Typical Operating Characteristics (COUT = 2.2μF/x5R, CBP = 10nF, unless otherwise specified ) Quiescent Current vs. Temperature Quiescent Current vs. Input Voltage 500 VIN = 3.3V 400 Quiescent Current (uA) Quiescent Current (uA) 500 300 200 100 400 300 200 100 0 0 -50 -40 300 -25 0 25 50 75 100 125 3 3.5 4 4.5 Temperature (°C) Input Voltage (V) Dropout Voltage vs. Load Current Current Limit VOUT = 2.8V 5 5.5 VIN = 3.3V 5 Output Current (A) 250 Dropout Voltage (mV) VIN = 3.3V 200 TJ = 25°C 150 TJ = 125°C 100 TJ = -40°C 4 3 2 1 0 50 0 0.0 0.2 0.4 0.6 0.8 Time (1ms/Div) 1.0 VIN = 3.3V, ILOAD : 560mA 10 5 0 4 2 0 Time (100us/Div) www.richtek.com 6 EN Pin Voltage (V) EN Pin Shutdown Response Output Voltage (V) Output Voltage (V) EN Pin Voltage (V) Load Current (A) Start Up 4 2 0 2 1 VIN = 3.3V ILOAD : 560mA 0 Time (25us/Div) DS9187-11 June 2011 RT9187 Input Voltage Deviation (V) VIN = 3.3V to 4.3V, ILOAD : 1A 4.3 3.3 100 0 VIN = 3.3V to 4.3V, ILOAD : 800mA 4.3 3.3 10 0 -10 Time (500us/Div) Time (500us/Div) Load Transient Response Load Transient Response Load Current (A) Load Current (A) -100 VIN = 3.3V, ILOAD : 50mA to 1A 1 0 Output Voltage Deviation (mV) Output Voltage Deviation (mV) Line Transient Response Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage Deviation (V) Line Transient Response 100 0 -100 VIN = 3.3V, ILOAD : 50mA to 800mA 1 0 (1A/Div) 50 0 (50mV/Div) -50 Time (100us/Div) Region of Stable COUT ESR vs. Load Current PSRR 100 VIN = VEN = 3.8V Region of Stable Stable C COUT ESR(Ω) (Ω) Region of OUTESR 20 Time (100us/Div) PSRR (dB) 0 -20 -40 -60 ILOAD = 280mA ILOAD = 10mA VIN = 3.3V 10 Unstable Range VIN = 6.0V Stable Range 1 0.1 0.01 Simulation Verify 0.001 -80 0.0 10 0.1 100 1.0 1k 10.0 10k 100.0 100k Frequency (Hz) DS9187-11 June 2011 1000.0 1M 10000.0 10M 0 0.2 0.4 0.6 0.8 1 Load Current (A) www.richtek.com 7 RT9187 Outline Dimension D2 D L E E2 1 e SEE DETAIL A b 2 1 2 1 A A1 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. Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 0.800 1.000 0.031 0.039 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 2.950 3.050 0.116 0.120 D2 2.100 2.350 0.083 0.093 E 2.950 3.050 0.116 0.120 E2 1.350 1.600 0.053 0.063 e L 0.650 0.425 0.026 0.525 0.017 0.021 V-Type 8L DFN 3x3 Package www.richtek.com 8 DS9187-11 June 2011 RT9187 H A M EXPOSED THERMAL PAD (Bottom of Package) Y J X B F C I D Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A 4.801 5.004 0.189 0.197 B 3.810 4.000 0.150 0.157 C 1.346 1.753 0.053 0.069 D 0.330 0.510 0.013 0.020 F 1.194 1.346 0.047 0.053 H 0.170 0.254 0.007 0.010 I 0.000 0.152 0.000 0.006 J 5.791 6.200 0.228 0.244 M 0.406 1.270 0.016 0.050 X 2.000 2.300 0.079 0.091 Y 2.000 2.300 0.079 0.091 X 2.100 2.500 0.083 0.098 Y 3.000 3.500 0.118 0.138 Option 1 Option 2 8-Lead SOP (Exposed Pad) Plastic Package Richtek Technology Corporation Richtek Technology Corporation Headquarter Taipei Office (Marketing) 5F, No. 20, Taiyuen Street, Chupei City 5F, No. 95, Minchiuan Road, Hsintien City Hsinchu, Taiwan, R.O.C. Taipei County, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Tel: (8862)86672399 Fax: (8862)86672377 Email: [email protected] Information that is provided by Richtek Technology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek. DS9187-11 June 2011 www.richtek.com 9