RP132x Series Low Voltage 1A LDO with Ext. VOUT Adjustable The RP132x Series are CMOS-based LDO regulators featuring 1A output with low on-resistance. RP132x offers almost the same basic performances as the RP131x Series. But RP132x offers an excellent load regulation. While the output voltage is internally set in the RP131x Series, the RP132x Series is available in two versions: fixed version in which the output voltage is internally set and the adjusted version in which it is set with an external resistor. RP132x has an inrush current limit circuit that limits approximately 500mA when the voltage regulator turns on. The E/F Version can set the inrush current limit time by connecting a capacitor with DELAY pin. ) RP132H/S/J Series are suitable for automotive applications too. Please refer to our "Car Electronics Products Catalog" or contact us. FEATURES * Supply Current (ISS) ************************ Typ. 65A (VIN=6.5V) * Standby Current (Istandby) ***************** Typ. 0.15A (VIN=6.5V, CE="L") * Dropout Voltage (VDIF) ******************** Typ. 0.52V (IOUT=1A, VSET=2.8V) * Ripple Rejection (RR)********************* Typ. 70dB (f=1kHz, VSET 3.3V) * Input Voltage Range (VIN) *************** 1.4V to 6.5V * Output Voltage Range (VOUT)********** 0.8V to 5.5V (Internally fixed) * * * * Load Regulation ***************************** Typ. 3mV(IOUT=300mA) Typ. 5mV(IOUT=1A) * Fold-back Protection Circuit *********** Current limit Typ. 250mA * Inrush Current Limit Circuit ************ Typ.500mA (B/D: for 500s after start-up) (E/F: The inrush current limit Time can be adjusted with an external capacitor.) 0.8V to 5.5V with external resistors (001) (Feedback voltage : 0.8V) Output Voltage Accuracy **************** 1% Temp. coeff. of Output Voltage ******* Typ. 60ppm/C Line Regulation******************************* Typ. 0.05%/V * Thermal Shutdown Circuit************** Stops at 165C. * Auto-discharge Function **************** D/F Version * Packages *************************************** DFN (PLP)1820-6, SOT-89-5, HSOP-6J, TO-252-5-P2 * Ceramic capacitors can be used.*** 2.2F or more (VSET 3.6V) (The above shows specification at Topt=25C. Design assurance value at -40C Topt 85C is also available. For details, please refer to the datasheet.) BLOCK DIAGRAMS RP132S/Hxx1x RP132J/Kxx1x RP132x001x (Internally fixed output voltage type) (Internally fixed output voltage type) (Externally adjustable output voltage type) VDD VDD VOUT VDD VOUT VOUT VFB VFB Vref Vref Vref GND CE Package DFN(PLP)1820-6 SOT-89-5 HSOP-6J TO-252-5-P2 Q'ty per Reel 5,000 pcs 1,000 pcs 1,000 pcs 3,000 pcs Part No. RP132K.xx.1. -TR RP132H.xx.1.# -T1-FE RP132S.xx.1. -E2-FE RP132J.xx.1.# -T1-FE PACKAGES (Top View) 5 SOT-89-5 4 5 4 DELAY pin: only RP132K0001E/F TYPICAL APPLICATIONS .xx. :Specify the output voltage within the range of 0.8V (.08.) to 5.5V (.55.) in 0.1V steps. For the externally adjustable output voltage type (.00.). .#. :Select from (.B.) without auto-discharge function or (.D.) with auto-discharge function. . :Select from (.B.) without auto-discharge function or (.D.) with auto-discharge function, (.E.) without auto-discharge function, with inrush current limit time adjustable pin, (.F. ) with auto-discharge function, with inrush current limit time adjustable pin. (RP132S001E/F is not available) 6 RP132x001x Ext. adjustable output voltage type VDD VFB 1 2 3 4 VOUT VFB GND CE NC or 5 DELAY 6 VDD 1 2 3 4 5 2 3 CE or GND NC or VDD VOUT 1 VDD OUT VOUT RP132x CIN R1 COUT VFB GND CE GND CIN : 2.2F or more, RP132K001E/F COUT : 2.2F or more (VSET 3.6V) Ext. adjustable output voltage with DELAY pin 4.7F or more (VSET > 3.6V) OUT V V Please refer to the datasheet for R1 RP132K 001E/F details of the externally adjustable C C V R2 output voltage type. DD OUT CE GND OUT IN FB DELAY 5 TO-252-5-P2 RP132x331x 4 2 3 1 VOUT 2 GND NC or 3 or DELAY 4 CE 5 GND 6 VDD 1 1 2 3 4 5 2 3 4 Dropout Voltage vs. Output Current 0.8 5 CE VDD GND VOUT VFB Dropout Voltage VDIF (V) 1 3 OUT COUT R2 CE 2 VOUT RP132J/K CIN TYPICAL CHARACTERISTIC HSOP-6J 6 RP132J/Kxx1x Internally fixed output voltage type 1 GND DELAY DELAY DELAY pin: only RP132Kxx1E/F SELECTION GUIDES DFN(PLP)1820-6 CE GND DELAY DELAY pin: only RP132Sxx1E/F Halogen Free Current Limit Thermal Shutdown Current Limit Thermal Shutdown Current Limit Thermal Shutdown CE 0.6 85C 25C - 40C 0.4 0.2 0 0 100 200 300 400 500 600 700 800 900 1000 Output Current IOUT (mA) ) The tab is substrate level (GND). APPLICATIONS * Power source for hand-held communication equipment, cameras, and VCRs * Power source for home appliances No.EK-265-121001 * Power source for battery-powered equipment CMOS LDO Regulator RP132x Series CMOS LDO Regulator Low Voltage 1A LDO with Ext. VOUT Adjustable Technical Information on Ricoh LDO Regulators Adjustable Output Voltage Type Adjustable Output Voltage Type Settings The externally adjustable output voltage type can adjust the output voltage by using the external division resistance. If the VFB voltage is described as set VFB, the output voltage can be set by using the following equations (set VFB:0.8V) For better accuracy, choosing R1 (<<RIC) reduces this error.RIC=Typ.1.3M:(guaranteed by design), Topt=25C The output voltage without the error-causing factor VOUT = Set VFB x ((R1 + R2) / R2) Notes * The VOUT pin of RP132x081x should be connected to the VFB pin. * RP132x081x can be adjusted the output voltage up to 5.5V. * Please use 16k or less for R2 resistor. VOUT R1 I1 VFB RIC V OUT IIC R2 GND I2 setV FB Inrush Current Limit Time Adjustable Function If you need to limit the inrush current completely in case of using the large output capacitor, Ricoh recommends the product equipped with the Inrush Current Limit Time Adjustable Function. The inrush current limit circuit of the RP132x Series has a DELAY pin and is able to adjust time of the inrush current limitation by connecting capacitor with a DELAY pin. (Graph 4) The relation between the inrush current limit time (tD) and the capacitance of the capacitor connecting with DELAY pin (CD(F)) is calculatable by the following formula; -12 6 tD=( CD + 70 x 10 ) x 0.525 x 10 The inrush current is limited even if the capacitor is not connected with the DELAY pin. In this case, the time is calculated as CD=0 by the formula above. (tD = about 37s) When you do not use CD of E/F version, the delay pin should be open. Imaginary graph CE Input Voltage CE Input Voltage Output Voltage Output Voltage Limiting not enough because of the limiting time is too short Limiting the inrush current Inrush Current Inrush Current Extended the inrush current limiting time Time t (s) Time t (s) (Graph 4) Good Load Regulation RP132x is less affected by the output current load because it separates the output voltage pin and the feedback voltage pin. So, RP132x is very good load regulation, the load regulation is Typ.5mV (IOUT=1A) The currently available information as of October 2012 is provided in this New Product News. EK-265-121001