RT9164A-28GL

RT9164A 1A Fixed and Adjustable Low Dropout Positive Voltage Regulators General Description The RT9164A series of high performance positive voltage regulators is designed for applications requiring low dropout performance at fully rated current. Additionally, the RT9164A series provides excellent regulation over variations in line and load. Outstanding features include low dropout performance at rated current, fast transient response, internal current-limiting, and thermal-shutdown protection of the output device. The RT9164A series of three terminal regulators offers fixed and adjustable voltage options available in space-saving SOT-223, TO-252, and TO-263 packages. Features Low Dropout Performance, 1.4V Max. Full Current Rating Over Line and Temperature Fast Transient Response ± 2% Output Voltage Accuracy 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, and 3.5V Fixed Adjustable Output Voltage SOT-223, TO-252, and TO-263 Packages RoHS Compliant and 100% Lead (Pb)-Free Applications Active SCSI Termination Low Voltage Microcontrollers Switching Power Supply Post-Regulator Ordering Information RT9164APackage Type G : SOT-223 L: TO-252 LR : TO-252 (R-Type) M : TO-263 Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commercial Standard) Output Voltage Default : Adjustable 15 : 1.5V 18 : 1.8V 25 : 2.5V 28 : 2.85V 30 : 3.0V 33 : 3.3V 35 : 3.5V Pin ConFigurations (TOP VIEW) 3 2 1 VIN VOUT (TAB) ADJ/GND SOT-223 3 2 1 VIN VOUT (TAB) ADJ/GND TO-252 3 2 1 VOUT ADJ/GND (TAB) VIN Note : 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. TO-252 (R-Type) 3 2 1 VIN VOUT (TAB) ADJ/GND TO-263 DS9164A-13 August 2007 www.richtek.com 1 RT9164A Typical Application Circuit VIN = 5V CIN + VIN RT9164A VOUT ADJ VREF IADJ R1 133 1% R2 232 1% VOUT = 3.45V + 10uF COUT 10uF Tantalum R2 VOUT = VREF(1+ )+IADJ R2 R1 (1) CIN needed if device is far from filter capacitors. (2) COUT required for stability. Figure 1. Adjustable Voltage Regulator VIN = 5V CIN + RT9164A-33 VIN VOUT GND + VOUT 3.3V COUT 10uF IQ 10uF Tantalum (1) CIN needed if device is far from filter capacitors. (2) COUT required for stability. Figure 2. Fixed Voltage Regulator VIN = 5V CIN 10uF + RT9164A-28 VIN VOUT GND COUT + 18 - 27 Lines 22uF IQ Figure 3. Active SCSI Bus Terminator www.richtek.com 2 DS9164A-13 August 2007 RT9164A Function Block Diagram VIN S.O.A. Current Limiting Amplifier LIMIT VOUT SENSE Thermal Overload Voltage Regulation Amplifer VREF ADJ/GND Functional Pin Description Pin Name ADJ/GND VOUT VIN Pin Function Adjust Output or Ground Output Voltage Power Input DS9164A-13 August 2007 www.richtek.com 3 RT9164A Absolute Maximum Ratings (Note 1) Supply Input Voltage -------------------------------------------------------------------------------------------------- 15V Power Dissipation, PD @ TA = 25°C SOT-223 ----------------------------------------------------------------------------------------------------------------- 0.740W TO-252 ------------------------------------------------------------------------------------------------------------------- 1.471W TO-263 ------------------------------------------------------------------------------------------------------------------- 2.222W Package Thermal Resistance (Note 6) SOT-223, θJA ------------------------------------------------------------------------------------------------------------ 135°C/W SOT-223, θJC ----------------------------------------------------------------------------------------------------------- 19°C/W TO-252, θJA ------------------------------------------------------------------------------------------------------------- 68° C/W TO-252, θJC ------------------------------------------------------------------------------------------------------------- 7.5° C/W TO-263, θJA ------------------------------------------------------------------------------------------------------------- 45° C/W TO-263, θJC ------------------------------------------------------------------------------------------------------------- 7.8° 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 (Human Body Mode) ------------------------------------------------------------------------------------------ 8 kV MM (Machine Mode) -------------------------------------------------------------------------------------------------- 750V Recommended Operating Conditions (Note 3) Supply Input Voltage -------------------------------------------------------------------------------------------------- 3V to 14V Junction Temperature Range ---------------------------------------------------------------------------------------- −40°C to 125°C Electrical Characteristics (TA = 25°C, unless otherwise specified) Parameter Reference Voltage (Note 4) Symbol Test Conditions IOUT = 10mA, (VIN−VOUT) = 2V, TA = 25°C 10mA < IOUT < 1.0A, 1.5V < VIN-VOUT < 10V IOUT = 10mA, VIN = 3.3V, TJ = 25°C 10mA < IOUT < 1.0A, 3.3V < VIN < 10V IOUT = 10mA, VIN = 3.3V, TJ = 25°C IOUT = 10mA, VIN = 4.0V, TJ = 25°C 10mA < IOUT < 1.0A, 4.0V < VIN < 10V IOUT= 10mA, VIN= 4.25V, TJ = 25°C IOUT= 10mA, VIN= 4.5V, TJ = 25°C 10mA < IOUT < 1.0A, 4.5V < VIN < 10V Min Typ Max Units V V 1.243 1.256 1.281 1.231 1.256 1.294 1.485 1.470 1.5 1.5 1.53 1.55 1.85 1.87 RT9164A VREF RT9164A -15 RT9164A -18 Output Voltage (Note 4) RT9164A -25 VOUT RT9164A -28 RT9164A -30 1.797 1.815 10mA < IOUT < 1.0A, 3.3V < VIN < 10V 1.779 1.815 2.475 2.500 2.550 2.450 2.500 2.575 2.822 2.850 2.910 2.970 3.000 3.060 2.940 3.000 3.090 V 10mA < IOUT < 1.0A, 4.25V < VIN < 10V 2.793 2.850 2.936 To be continued www.richtek.com 4 DS9164A-13 August 2007 RT9164A Parameter RT9164A -33 V OUT RT9164A -35 Symbol Test Conditions IOUT = 1 0mA, VIN = 4 .75V, TJ = 25° C IOUT = 1 0mA, VIN= 5V, TJ = 25 °C Min Typ Max Units 3.267 3.300 3.365 V Output Voltage (Note 4) 1 0mA < IOUT < 1.0A, 4.75V < V IN < 10V 3.234 3.300 3.400 3.465 3.500 3.570 1 0mA < IOUT < 1.0A, 5.0V < V IN < 10V 3.430 3.500 3.605 IOUT = 10mA, 1.5V ≤ VIN− V OUT ≤ 10V IOUT = 1 0mA, 3.3V ≤ VIN ≤ 15V IOUT = 1 0mA, 3.3V ≤ VIN ≤ 15V ------------------1.0 ----1 0mA ≤ IOUT ≤ 1.0A, V IN = 5V -0.1 1 1 1 1 1 1 1 0.2 1 1 1 1 1 1 1 1.3 1.8 5 5 72 65 0.2 0.3 6 6 6 6 6 6 6 0.4 10 10 10 10 12 12 15 1.4 -10 10 -120 5 RT9164A RT9164A -15 RT9164A -18 Line Regulation (Note 4) RT9164A -25 RT9164A -28 RT9164A -30 RT9164A -33 RT9164A -35 RT9164A RT9164A -15 RT9164A -18 Load Regulation (Note 4) RT9164A -25 RT9164A -28 RT9164A -30 RT9164A -33 RT9164A -35 Dropout Voltage Current Limit Minimum Load Current RT9164A Quiescent Current Ripple Rejection Adjust Pin Current Adjust Pin Current Change RT9164A -XX IQ PSRR IADJ ΔIADJ (Note 5) V DROP ILIM ΔVLOA D ΔVLINE % mV mV mV mV mV mV mV % mV mV mV mV mV mV mV V V A mA mA dB μA μA IOUT = 1 0mA, 4.0V ≤ VIN ≤ 15V IOUT = 1 0mA, 4.25V ≤ VIN ≤ 15V IOUT = 1 0mA, 4.5V ≤ VIN ≤ 15V IOUT = 1 0mA, 4.75V ≤ VIN ≤ 15V IOUT = 1 0mA, 5.0V ≤ VIN ≤ 15V ( V IN −VOUT) = 3V, 10mA ≤ I OUT ≤ 1.0A V IN = 3.3V, 10mA ≤ I OUT ≤ 1 .0A V IN = 3.3V, 10mA ≤ I OUT ≤ 1.0A V IN = 4.0V, 10mA ≤ I OUT ≤ 1 .0A V IN = 4.25V, 10mA ≤ I OUT ≤ 1.0A V IN = 4.5V, 10mA ≤ I OUT ≤ 1 .0A V IN = 4.75V, 10mA ≤ I OUT ≤ 1 .0A V IN = 5.0V, 10mA ≤ I OUT ≤ 1.0A IOUT = 5 00mA IOUT = 1.0A V IN = 5V (V IN −VOUT) = 2V V IN = 5V f RIP PLE = 120Hz , ( V IN − VOUT) = 2V, VRIP PLE = 1V P-P 1.15 1.25 DS9164A-13 August 2007 www.richtek.com 5 RT9164A 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. Low duty cycle pulse testing with Kelvin connections. Note 5. The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV. Note 6. θJA i s 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. The case point of θJC is on the center of the exposed pad. The pad size is 6mm2 on SOT-223 packages, 100mm2 on TO-252 packages, 125mm2 on TO-263 packages. www.richtek.com 6 DS9164A-13 August 2007 RT9164A Typical Operating Characteristics Output Voltage vs. Temperature 3.4 1.27 Reference Voltage vs. Temperature VOUT = 3.3V 3 Reference Voltage (V) Output Voltage (V) 1.26 2.6 VOUT = 2.5V 2.2 1.25 1.8 VOUT = 1.5V 1.4 -50 -25 0 25 VIN = 5V CIN = 10uF Electrolytic CO = 10uF Tantalum RL = ∞ 1.24 VIN = 5V CIN = 10uF Electrolytic CO = 10uF Tantalum R1 = R2 = 100Ω RL = ∞ -50 -25 0 25 50 75 100 125 1.23 50 75 100 125 Temperature (° C) Temperature (° C) ADJ Pin Current vs. Temperature 80 7 6 5 4 3 2 1 0 Quiescent Current vs. Temperature 70 Quiescent Current (mA) ADJ Pin Current (uA) VOUT = 2.5V 60 50 VIN = 5V CIN = 10uF Electrolytic CO = 10uF Tantalum R1 = R2 = 100Ω RL = ∞ -50 -25 0 25 50 75 100 125 40 VIN = 5V CIN = 10uF Electrolytic CO = 10uF Tantalum RL = ∞ -50 -25 0 Temperature (° C) Temperature(° C) 25 50 75 100 125 Current Limit vs. Input Voltage 3 2.5 2 Current Limit vs. Temperature 1.9 Current Limit (A) 2 1.5 1 0.5 0 2 4 6 8 Current Limit (A)1 VOUT = 2.5V, RL = 1Ω 1.8 VOUT = 2.5V, RL = 1Ω 1.7 1.6 CIN = 10uF Electrolytic CO = 10uF Tantalum 10 12 14 1.5 -50 -25 0 25 VIN = 5V CIN = 10uF Electrolytic CO = 10uF Tantalum 50 75 100 125 Input Voltage (V) DS9164A-13 August 2007 Temperature (° C) www.richtek.com 7 RT9164A Dropout Voltage vs. Io 1.3 Current Limit 3.5 -40°C 3 VOUT = 2.5V Dropout Voltage (V)1 1.2 25°C 1.1 Current Limit (A) 2.5 2 1.5 1 0.5 0 VIN = 5V, VOUT = 2.5V CIN = 10uF Electrolytic CO = 10uF Tantalum RL = 1Ω 1.0 0.9 125°C CIN = 10uF Electrolytic CO = 10uF Tantalum 0 0.3 0.6 0.9 1.2 1.5 0.8 Load Current (A) Time (2.5ms/Div) Line Transient Response Output Voltage Deviation (mV) 20 10 0 -10 Line Transient Response Output Voltage Deviation (mV) 40 30 20 0 -20 VOUT = 2.5V CO = 10uF Tantalum ILOAD = 100mA 30 VOUT = 1.5V CO = 10uF Tantalum ILOAD = 100mA Input Voltage Deviation (V) Input Voltage Deviation (V) 7 6 5 7 6 5 Time (10us/Div) Time (10us/Div) Line Transient Response Output Voltage Deviation (mV) 30 20 0 -20 7 6 5 Load Transient Response Output Voltage Deviation (mV) 300 200 100 0 -100 VIN = 3.3V, VOUT = 1.5V CIN = CO = 10uF Tantalum Preload = 0.1A 40 VOUT = 3.3V CO = 10uF Tantalum ILOAD = 100mA Load Current (A) Input Voltage Deviation (V) 1 0.5 0 Time (10us/Div) Time (10us/Div) www.richtek.com 8 DS9164A-13 August 2007 RT9164A Load Transient Response Output Voltage Deviation (mV) Output Voltage Deviation (mV) 300 200 100 0 -100 VIN = 3.3V, VOUT = 1.5V CIN = CO = 10uF Tantalum Preload = 0.1A 300 200 100 0 -100 Load Transient Response VIN = 5V, VOUT = 2.5V CIN = CO = 10uF Tantalum Preload = 0.1A Load Current (A) Load Current (A) 2 1 0 1 0.5 0 Time (10us/Div) Time (10us/Div) Load Transient Response Output Voltage Deviation (mV) 300 200 100 0 -100 Load Transient Response 300 Output Voltage Deviation (mV) Load Current (A) VIN = 5V, VOUT = 2.5V CIN = CO = 10uF Tantalum Preload = 0.1A VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 3.3V 200 CIN = CO = 10uF Tantalum CIN = CO = 10uF Tantalum Preload = 0.1A Preload = 0.1A 100 0 -100 1 0.5 0 Load Current (A) 2 1 0 Time (10us/Div) Time (10us/Div) Load Transient Response Output Voltage Deviation (mV) 300 200 100 0 -100 VIN = 5V, VOUT = 3.3V CIN = CO = 10uF Tantalum Preload = 0.1A Load Current (A) 2 1 0 Time (10us/Div) DS9164A-13 August 2007 www.richtek.com 9 RT9164A Application Information Output voltage adjustment Like most regulators, the RT9164A regulates the output by comparing the output voltage to an internally generated reference voltage. On the adjustable version as shown in Figure 4, the VREF is available externally as 1.25V between VOUT and ADJ. The voltage ratio formed by R1 and R2 should be set to conduct 10mA (minimum output load). The output voltage is given by the following equation: VOUT = VREF (1+ R2 R1 Output Capacitor RT9164A requires a capacitor from VOUT to GND to provide compensation feedback to the internal gain stage. This is to ensure stability at the output terminal. Typically, 10μF tantalum or 50μF aluminum electrolytic with 30mΩ to 2Ω range capacitor is sufficient. The output capacitor does not have a theoretical upper limit and increasing its value will increase stability. COUT = 100μF or more is typical for high current regulator design. ) + IADJ R2 On fixed versions of RT9164A, the voltage divider is provided internally. Region of Stable COUT ESR vs. Load Current 10 VIN CIN 10uF + RT9164A VIN VOUT ADJ IADJ 65uF COUT = 100uF VOUT Instable 10uF + C OUT ESR (Ω) VREF R1 COUT 1 COUT = 10uF Stable + CADJ R2 0.1 Figure 4. Basic Adjustable Regulator Input Bypass Capacitor An input capacitor is recommended. A 10μF tantalum on the input is a suitable input bypassing for almost all applications. Adjust Terminal Bypass Capacitor The adjust terminal can be bypassed to ground with a bypass capacitor (CADJ) to improve ripple rejection. This bypass capacitor prevents ripple from being amplified as the output voltage is increased. At any ripple frequency, the impedance of the CADJ should be less than R1 to prevent the ripple from being amplified: (2π x fRIPPLE x CADJ) < R1 The R1 is the resistor between the output and the adjust pin. Its value is normally in the range of 100-200Ω. For example, with R1 = 124Ω and fRIPPLE = 120Hz, the CADJ should be > 11μF. 0.01 0 0.2 0.4 Instable 0.6 0.8 1 Load Current (A) Figure 5 Load Regulation When the adjustable regulator is used (Figure 6), the best load regulation is accomplished when the top of the resistor divider (R1) is connected directly to the output pin of the RT9164A. When so connected, RP is not multiplied by the divider ratio. For Fixed output version, the top of R1 is internally connected to the output and ground pins can be connected to low side of the load. www.richtek.com 10 DS9164A-13 August 2007 RT9164A VIN RT9164A VIN VOUT ADJ RP Parasitic Line Resistance R1 (Connect R1 to VOUT or case) RL R2 Connect R2 to load Figure 6. Best Load Regulation Using Adjustable Output Regulator Thermal Protection RT9164A has thermal protection which limits junction temperature to 150°C. However, device functionality is only guaranteed to a maximum junction temperature of +125°C. The power dissipation and junction temperature for RT9164A are given by PD = (VIN - VOUT) x IOUT TJUNCTION = TAMBIENT + (PD x θJA) Note: TJUNCTION must not exceed 125° C Current Limit Protection RT9164A is protected against overload conditions. Current protection is triggered at typically 1.8A. Thermal Consideration The RT9164A series contain thermal limiting circuitry designed to protect itself from over-temperature conditions. Even for normal load conditions, maximum junction temperature ratings must not be exceeded. As mention in thermal protection section, we need to consider all sources of thermal resistance between junction and ambient. It includes junction-to-case, case-to-heat-sink interface, and heat sink thermal resistance itself. Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. Proper mounting is required to ensure the best possible thermal flow from this area of the package to the heat sink. The case of all devices in this series is electrically connected to the output. Therefore, if the case of the device must be electrically isolated, a thermally conductive spacer is recommended. DS9164A-13 August 2007 www.richtek.com 11 RT9164A Outline Dimension D D1 H C B L e e L1 A b A1 Symbol A A1 b B C D D1 e H L L1 Dimensions In Millimeters Min 1.450 0.020 0.610 3.302 6.706 6.299 2.896 2.261 0.229 1.550 0.800 Max 1.803 0.100 0.787 3.708 7.290 6.706 3.150 2.362 0.330 1.950 1.100 Dimensions In Inches Min 0.057 0.0008 0.024 0.130 0.264 0.248 0.114 0.089 0.009 0.061 0.009 Max 0.071 0.0047 0.031 0.146 0.287 0.264 0.124 0.093 0.013 0.077 0.013 3-Lead SOT-223 Surface Mount Package www.richtek.com 12 DS9164A-13 August 2007 RT9164A D D1 B T V E L1 S U R C L3 b1 b e b2 L2 A Symbol A B b b1 b2 C D D1 E e L1 L2 L3 U V R S T Dimensions In Millimeters Min 2.184 0.889 0.508 0.457 0.457 6.350 5.207 5.334 2.108 9.398 0.635 Max 2.388 2.032 0.889 0.584 0.584 6.731 5.461 6.223 2.438 10.414 1.016 Dimensions In Inches Min 0.086 0.035 0.020 0.018 0.018 0.250 0.205 0.210 0.083 0.370 0.025 Max 0.094 0.080 0.035 0.023 0.023 0.265 0.215 0.245 0.096 0.410 0.040 1.016 Ref. 0.040 Ref. 0.508 Ref. 3.810 Ref. 3.048 Ref. 0.200 2.500 0.500 0.850 3.400 0.850 0.020 Ref. 0.150 Ref. 0.120 Ref. 0.008 0.098 0.020 0.033 0.134 0.033 3-Lead TO-252 Surface Mount Package DS9164A-13 August 2007 www.richtek.com 13 RT9164A D B C U V E L1 b1 L2 e b b2 A Symbol A B b b1 b2 C D E e L1 L2 U V Dimensions In Millimeters Min 4.064 1.143 0.660 1.143 0.305 1.143 9.652 8.128 2.286 14.605 2.286 Max 4.826 1.676 0.914 1.397 0.584 1.397 10.668 9.652 2.794 15.875 2.794 Dimensions In Inches Min 0.160 0.045 0.026 0.045 0.012 0.045 0.380 0.320 0.090 0.575 0.090 Max 0.190 0.066 0.036 0.055 0.023 0.055 0.420 0.380 0.110 0.625 0.110 6.223 Ref. 7.620 Ref. 0.245 Ref. 0.300 Ref. 3-Lead TO- 263 Surface Mount Package Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Richtek Technology Corporation Taipei Office (Marketing) 8F, No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com www.richtek.com 14 DS9164A-13 August 2007