RT9187 1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator General Description 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 0.1uA 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) Features Ultra-Low-Noise for RF Application Ultra-Fast Response in Line/Load Transient Quick Start-Up (Typically 40μ μs) < 0.1uA 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 2.2uF 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 Operating Temperature Range P : Pb Free with Commercial Standard For marking information, contact our sales representative G : Green (Halogen Free with Commerdirectly or through a RichTek distributor located in your cial Standard) area, otherwise visit our website for detail. None : Adjustable Output Fixed Output Voltage Code Pin Configurations 10 : 1.0V (TOP VIEW) 11 : 1.1V : 8 EN VIN 1 32 : 3.2V 7 NC VIN 2 33 : 3.3V 6 GND VOUT 3 9 5 BP/ADJ VOUT 4 1L : 1.34V Note : VDFN-8L 3x3 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. VIN VIN VOUT VOUT 2 8 EN 7 NC GND 3 6 9 4 5 GND BP/ADJ SOP-8 (Exposed Pad) DS9187-09 April 2008 www.richtek.com 1 RT9187 Typical Application Circuit VIN VIN CIN 2.2uF VOUT COUT 2.2uF VOUT VIN RT9187 VOUT R1 RT9187 BP Chip Enable VIN CIN 2.2uF ADJ CBP 10nF EN VOUT COUT 2.2uF 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. Fixed Output Adjustable Voltage Output Voltage Pin Name Pin Function 1 1 VIN Supply Input. 2 2 VIN Supply Input. 3 3 VOUT Regulator Output. 4 4 VOUT Regulator Output. 5 -- BP -- 5 ADJ 6 6 GND Ground 7 7 NC No Internal Connection. 8 8 EN Noise Reduction. Connecting a 10nF capacitor to GND to reduce output noise. If external feedback resistors are applied, the output voltage will be: Exposed Pad (9) www.richtek.com 2 NC VOUT = 0.8 × (1+ R1 ) Volts R2 Enable Input Logic, Active High. W hen the EN goes to a logic low, the device is in shutdown mode. No Internal Connection. The exposed pad must be soldered to a large PCB and connected to GND for maximum power dissipation. DS9187-09 April 2008 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 DS9187-09 April 2008 GND www.richtek.com 3 RT9187 Absolute Maximum Ratings (Note 1) Supply Input Voltage -------------------------------------------------------------------------------------------------- 6V EN Input Voltage ------------------------------------------------------------------------------------------------------- 6V Power Dissipation, PD @ TA = 25°C VDFN-8L 3x3 ----------------------------------------------------------------------------------------------------------- 0.923W SOP-8 (Exposed Pad) ----------------------------------------------------------------------------------------------- 1.33W Package Thermal Resistance (Note 9) VDFN-8L 3x3, θJC ----------------------------------------------------------------------------------------------------- 8.2°C/W VDFN-8L 3x3, θJA ------------------------------------------------------------------------------------------------------ 108°C/W SOP-8 (Exposed Pad), θJC ----------------------------------------------------------------------------------------- 15°C/W SOP-8 (Exposed Pad)-8, θJA --------------------------------------------------------------------------------------- 75°C/W Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260°C Junction Temperature ------------------------------------------------------------------------------------------------- 150°C Storage Temperature Range ---------------------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility (Note 2) HBM ---------------------------------------------------------------------------------------------------------------------- 2kV MM ------------------------------------------------------------------------------------------------------------------------ 200V Recommended Operating Conditions (Note 3) Supply Input Voltage -------------------------------------------------------------------------------------------------- 2.5V to 5.5V EN Input Voltage ------------------------------------------------------------------------------------------------------- 0V to 5.5V Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C Ambient Temperature Range ---------------------------------------------------------------------------------------- −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 Output Voltage Accuracy (Fixed Output Voltage) Symbol ΔV OUT Test Conditions IO UT = 10mA Min Typ Max Units −2 0 +2 % 0.8 -- 4.5 V Output Voltage Range (Adjustable) V OUT_Adj Quiescent Current (Note 6) IQ V EN ≥ VIH, IOUT = 0mA -- 380 500 μA Standby Current (Note 7) IS TBY V EN ≤ VIL,V IN = 3.3V -- 0.1 1 μA Current Limit ILIM RLO AD = 0.5Ω, VIN = 3.3V 2 2.8 3 A I OUT = 0.25A (Note 8) -- 60 100 IO UT = 0.5A -- 120 180 IO UT = 1.0A -- 240 360 -- 0.4 -- Dropout Voltage (Note 4) Load Regulation (Note 5) (Fixed Output Voltage) EN Threshold V DROP ΔV LOAD V IN = (VOUT + 0.5V) 10mA < IOUT < 1.0A Logic-Low Voltage V IL V IN = 3.3V -- -- 0.6 Logic-High Voltage V IH V IN = 3.3V 1.8 -- -- IE N V IN = 3.3V, Enable -- 0.1 1 Enable Pin Current mV %/A V μA To be continued www.richtek.com 4 DS9187-09 April 2008 RT9187 Parameter Power Supply Rejection Rate f = 100Hz f = 10kHz Symbol PSRR Test Conditions IOUT = 300mA Min Typ Max -- −60 -- -- −50 -- Units dB Line Regulation ΔV LINE VIN = (VOUT +0.5) to 5.5V, IOUT = 1mA -- -- 0.3 % Start-Up Time TStart_Up RLO AD = 3Ω, 1nF ≤ CBP ≤ 0.1μF -- 40 -- μs Thermal Shutdown Temperature TSD -- 170 -- Thermal Shutdown Hysteresis ΔTSD -- 30 -- Reference Voltage Tolerance V REF 0.784 0.8 0.816 V ADJ Pin Current IA DJ -- 10 100 nA °C ADJ V ADJ = 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. Devices are ESD sensitive. Handling precaution is recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV. Note 5. 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 6. 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 7. Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (VEN >1.8V ). Note 8. Performance at -5°C ≤ TA ≤ 85°C is assured by design. Note 9. θJA is measured in the natural convection at T A = 25°C on a low effective thermal conductivity test board of JEDEC 51-3 thermal measurement standard. DS9187-09 April 2008 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) DS9187-09 April 2008 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 of Stable Stable C COUT ESR(Ω) (Ω) Region OUTESR 20 Time (100us/Div) PSRR (dB) 0 -20 -40 ILOAD = 280mA -60 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) DS9187-09 April 2008 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. Symbol Dimensions In Millimeters Dimensions In Inches 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 DS9187-09 April 2008 RT9187 H A M EXPOSED THERMAL PAD (Bottom of Package) Y J X B F C I D Dimensions In Millimeters Symbol Dimensions In Inches 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 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] DS9187-09 April 2008 www.richtek.com 9