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 0.1μA 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 package. Ordering Information RT9187(- ) Package Type QV : VDFN-8L 3x3 (V-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) None : Adjustable Output Fixed Output Voltage Code 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.8V 30 : 3.0V 33 : 3.3V Note : Richtek Pb-free and Green products are : `RoHS compliant and compatible with the current require- 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, otherwise visit our website for detail. Pin Configurations (TOP VIEW) VIN VIN VOUT VOUT 1 2 3 4 9 8 7 6 5 EN NC GND BP/ADJ VDFN-8L 3x3 ments of IPC/JEDEC J-STD-020. `Suitable for use in SnPb or Pb-free soldering processes. `100% matte tin (Sn) plating. DS9187-08 August 2007 www.richtek.com 1 RT9187 Typical Application Circuit VIN VIN CIN 2.2uF VOUT COUT 2.2uF VOUT RT9187 VIN VOUT CIN 2.2uF R1 RT9187 BP Chip Enable VIN ADJ CBP 10nF EN VOUT COUT 2.2uF Chip Enable EN GND R2 GND Figure 1. Fixed Operation 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. RT9187-xxPQV RT9187PQV (Fixed) (Adjustable) 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 Noise Reduction. Connecting a 10nF capacitor to GND to reduce output noise. If external feedback resistors are applied, the output voltage will be: 5 ADJ 6 6 GND Common Ground. 7 7 NC No Internal Connection. 8 8 EN Exposed Pad (9) www.richtek.com 2 NC VOUT = 0.8 × (1+ R1 ) Volts R2 Enable Input Logic, Active High. When the EN goes to a logic low, the device is in shutdown mode. No Internal Connection. DS9187-08 August 2007 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 DS9187-08 August 2007 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 Package Thermal Resistance (Note 9) VDFN-8L 3x3, θJC ----------------------------------------------------------------------------------------------------- 8.2°C/W VDFN-8L 3x3, θJA ------------------------------------------------------------------------------------------------------ 108°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 Symbol Test Conditions Min Typ Max Units −2 0 +2 % 0.8 -- 4.5 V Output Voltage Accuracy (Fixed Output Voltage) ΔVOUT Output Voltage Range (Adjustable) VOUT_Adj Quiescent Current (Note 6) IQ VEN ≥ VIH, IOUT = 0mA -- 380 500 μA Standby Current (Note 7) ISTBY VEN ≤ VIL,VIN = 3.3V -- 0.1 1 μA Current Limit ILIM RLOAD = 0.5Ω, VIN = 3.3V 2 2.8 3 A IOUT = 0.25A (Note 8) -- 60 100 IOUT = 0.5A -- 120 180 IOUT = 1.0A -- 240 360 ΔVLOAD VIN = (VOUT + 0.5V) 10mA < IOUT < 1.0A -- 0.4 -- Logic-Low Voltage VIL VIN = 3.3V -- -- 0.6 Logic-High Voltage VIH VIN = 3.3V 1.8 -- -- IEN VIN = 3.3V, Enable -- 0.1 1 PSRR IOUT = 300mA -- −60 -- -- −50 -- Dropout Voltage (Note 4) VDROP Load Regulation (Note 5) (Fixed Output Voltage) EN Threshold Enable Pin Current Power Supply Rejection Rate f = 100Hz f = 10kHz IOUT = 10mA mV %/A V μA dB To be continued www.richtek.com 4 DS9187-08 August 2007 RT9187 Parameter Symbol Test Conditions Min Typ Max Units Line Regulation ΔV LINE V IN = (V OUT +0.5) to 5.5V, IO UT = 1mA -- -- 0.3 % Start-Up Time TStart_Up RLOAD = 3Ω, 1nF ≤ C BP ≤ 0.1μF -- 40 -- μs Thermal Shutdown Temperature TSD -- 170 -- Thermal Shutdown Hysteresis ΔTS D -- 30 -- Reference Voltage Tolerance VREF 0.784 0.8 0.816 V ADJ Pin Current IADJ -- 10 100 nA °C ADJ VADJ = V REF 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. 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. DS9187-08 August 2007 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) DS9187-08 August 2007 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 Regulation Load Transient Regulation 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 Regulation Output Voltage Deviation (mV) Output Voltage Deviation (mV) Input Voltage Deviation (V) Line Transient Regulation 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) DS9187-08 August 2007 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 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 8 DS9187-08 August 2007