RT9187GSP

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) 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: marketing@richtek.com 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