RP108J081D-T1-FE

RP108J Series Low Input Voltage 3A LDO Regulator NO.EA-203-201216 OUTLINE The RP108J is a CMOS-based voltage regulator IC featuring 3A output with low ON-resistance. The RP108J consists of a voltage reference unit, an error amplifier, resistor-net for voltage setting, a fold-back protection circuit, and a thermal shutdown circuit. The RP108J features both low supply current and high output current, and the dropout voltage is much smaller than bi-polar's. The minimum input voltage is as low as 1.6V and the output voltage can be set from 0.8V, therefore it can be connected with the DC/DC converter as the latter power supply for high density LSI that is operated by low output voltage. The output voltage of RP108J081x is externally adjustable by using external divide resistors. The CE pin of the RP108J can switch the regulator to standby mode. In addition to a fold-back protection circuit, which is already built in the conventional regulators, The RP108J contains a thermal shutdown circuit, a constant slope circuit as a soft-start function and a reverse current protection circuit. Ceramic capacitors can be used. FEATURES                 Output Current ............................................................. Min. 3A Supply Current ............................................................. Typ. 350A Standby Current ........................................................... Typ. 2A Input Voltage Range .................................................... 1.6V to 5.25V Output Voltage Range.................................................. Fixed Output Voltage Type: 0.8V to 4.2V (0.1V steps) * Refer to MARK INFORMATIONS for other voltages. Adjustable Output Voltage Type: 0.8V to 4.2V Output Voltage Accuracy.............................................. 1.0% (15mV accuracy, When VSET ≤ 1.5V) Output Voltage Temperature-drift Coefficient ........... Typ. 100ppm/C Ripple Rejection ........................................................... Typ. 65dB (f = 1kHz, VSET = 2.8V) Dropout Voltage ........................................................... Typ. 0.51V (VSET=2.8V) Line Regulation ............................................................ Typ. 0.1%/V Package ....................................................................... TO-252-5-P2 Built-in Fold-back Protection Circuit ............................. Typ. 220mA Built-in Thermal Shutdown Circuit................................ Stops at 165C Built-in Constant Slope Circuit Built-in Reverse Current Protection Circuit Ceramic capacitors are recommended to be used with this IC ꞏꞏꞏꞏ 10F or more APPLICATIONS  Power source for battery-powered equipments.  Power source for portable communication equipments such as cameras and VCRs.  Power source for electrical home appliances. 1 RP108J NO.EA-203-201216 BLOCK DIAGRAMS RP108Jxx1B/E VDD RP108Jxx1D/F VOUT VDD VOUT VFB VFB Vref Vref Current Limit Thermal Shutdown Current Limit Thermal Shutdown CE GND CE Reverse Detecter GND Reverse Detecter SELECTION GUIDE The output voltage, auto discharge function, and the soft-start time for the ICs can be selected at the user’s request. Product Name RP108Jxx1(y) -T1-FE Package Quantity per Reel Pb Free Halogen Free TO-252-5-P2 3,000 pcs Yes Yes xx: The set output voltage (VSET) can be designated in the range of 0.8V(08) to 4.2V(42) in 0.1V steps. y: If the output voltage includes the 3rd digit, indicate the digit of 0.01V. (1.25V, 1.85V, 2.85V) Ex. If the output voltage is 1.25V, RP108J1215-T1-FE. If the output voltage is 1.85V, RP108J1815-T1-FE. If the output voltage is 2.85V, RP108J2815-T1-FE. : Designation of auto-discharge function at off state and the soft-start time (B) No auto-discharge function, soft start time typ. 180 μs (D) Auto-discharge function, soft start time typ. 180 μs (E) No auto-discharge function, soft start time typ. 570 μs (F) Auto-discharge function, soft start time typ. 570 μs . Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. Refer to CONSTANT SLOPE CIRCUIT for detailed information on the difference of soft-start time and its effect. 2 RP108J NO.EA-203-201216 PIN DESCRIPTIONS TO-252-5-P2  1 2 3 4 5 TO-252-5-P2 Pin No. Symbol Description 1 CE Chip Enable Pin ("H" Active) 2 VDD Input Pin 3 GND Ground Pin 4 VOUT Output Pin 5 VFB Feedback Pin *1The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate level). It is recommended that the tab be connected to the ground plane on the board, or otherwise be left floating. The VOUT pin should be connected to the VFB pin when using RP108J as an internal fixed output voltage type. In case of using RP108J as an external adjustable type, please refer to "Adjustable Output Voltage Type Settings". 3 RP108J NO.EA-203-201216 ABSOLUTE MAXIMUM RATINGS Symbol Item Rating Unit 6.0 V V VIN Input Voltage VCE Input Voltage (CE Input Pin) 0.3 to 6.0 VFB Input Voltage (VFB Pin) 0.3 to 6.0 V VOUT Output Voltage 0.3 to VIN0.3 V High Wattage Land Pattern 3800 Standard Land Pattern 1900 PD Power Dissipation (TO-252-5P2)*1 Ta Operating Temperature 40 to 85 C Storage Temperature 55 to 125 C Tstg mV *1 For Power Dissipation, please refer to PACKAGE INFORMATION. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings are not assured. 4 RP108J NO.EA-203-201216 ELECTRICAL CHARACTERISTICS VIN = VSET +1.0V, IOUT 1mA, CIN COUT 10μF, unless otherwise noted. The specifications surrounded by are guaranteed by design engineering at - 40C ≤ Ta ≤85C. RP108Jxx1B/D/E/F Symbol (Ta25C) Item Conditions Ta = 25ºC VOUT Output Voltage -40ºC ≤ Ta ≤ 85ºC ILIM Min. Typ. Max. Unit VSET > 1.5V 0.99 1.01 V VSET ≤ 1.5V -15 15 mV VSET > 1.5V 0.97 1.02 V VSET ≤ 1.5V -45 30 mV Output Current Limit 3.0 A 1mA ≤ IOUT ≤ 300mA -15 2.0 20 1mA ≤ IOUT ≤ 3000mA -70 3.0 50 VOUT/ IOUT Load regulation VDIF Dropout Voltage ISS Supply Current IOUT = 0mA 350 500 A Istandby Standby Current VCE = 0V 2.0 5.0 A VOUT /VIN Line Regulation VSET 0.5V ≤ VIN ≤ 5.25V, IOUT=1mA (When VSET ≤ 1.1V, VIN = 1.6V) 0.10 0.15 %/V VIN Input Voltage1 5.25 V RR Ripple Rejection mV Please refer to Dropout Voltage on the next page. 1.6 f = 1kHz, Ripple 0.2Vp-p IOUT =100mA VSET ≤ 2.8V 65 dB VSET > 2.8V 55 dB Output Voltage -40C ≤ Ta ≤ 85ºC Temperature Coefficient 100 ppm /ºC ISC Short Current Limit 220 mA IPD CE Pull-down Current VCEH CE Input Voltage "H" VCEL CE Input Voltage "L" VOUT /Ta en TTSD TTSR RLOW IREV Output Noise Thermal Shutdown Temperature Thermal Shutdown Released Temperature Auto-discharge Nch Tr. ON Resistance (D/F version) Reverse Current Limit VOUT = 0V 0.3 0.6 1.0 A V 0.4 V BW = 10Hz to 100kHz 70 Vrms Junction Temperature 165 ºC Junction Temperature 95 ºC VIN = 4.0V, VCE = 0V 30 Ω VOUT > 0.5V, 0V ≤ VIN ≤ 5.25V 10 A All test items listed under Electrical Characteristics are done under the pulse load condition (Tj ≈ Ta = 25ºC) except Ripple Rejection, Output Voltage Temperature Coefficient, Output Noise and Thermal Shutdown. 1 The maximum input voltage listed under Electrical Characteristics is 5.25V. If for any reason the input voltage exceeds 5.25V, it has to be no more than 5.5V with 500 cumulative operating hours. 5 RP108J NO.EA-203-201216 The specifications surrounded by are guaranteed by design engineering at - 40C ≤ Ta ≤85C. Dropout Voltage by Output Voltage Output Voltage VSET (V) (Ta25C) Dropout Voltage VDIF (V) Typ. Max. 0.8 ≤ VSET < 0.9 0.910 1.110 0.9 ≤ VSET < 1.0 0.865 1.000 1.0 ≤ VSET < 1.1 0.810 0.950 0.755 0.895 0.720 0.840 1.5 ≤ VSET < 2.5 0.630 0.760 2.5 ≤ VSET < 3.3 0.510 0.600 3.3 ≤ VSET ≤ 4.2 0.480 0.560 1.1 ≤ VSET < 1.2 1.2 ≤ VSET < 1.5 Condition IOUT3000mA RECOMMENDED OPERATING CONDITIONS (ELECTRICAL CHARACTERISTICS) All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions. The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions. 6 RP108J NO.EA-203-201216 TYPICAL APPLICATIONS VDD VOUT VOUT RP108Jxx1x C1 C2 VFB CE GND Typical Application VDD RP108J081x C1 VOUT VOUT R1 C2 VFB R2 CE GND Typical application for adjustable output voltage type External Components： Symbol Descriptions C1, C2 10F (Ceramic), CM21X7R106M06AB, KYOCERA 7 RP108J NO.EA-203-201216 TECHNICAL NOTES When using the RP108J as an internally fixed output voltage type, please connect the VOUT pin to the VFB pin. However, when using it as the Adjustable Output Voltage Type, The output voltage of the externally adjustable output voltage type should be set to 4.2V or less. Also, total resistors value of R1 and R2 should be 20k or less. Phase Compensation In the IC, phase compensation is made for securing stable operation even if the load current is varied. For this purpose, use a 10μF or more capacitor C2. In case of using a tantalum capacitor and its ESR is large, the output may be unstable. Therefore, select C2 carefully considering its frequency characteristics. The recommended temperature characteristics for C1 and C2 capacitors are the followings.  B Characteristics: Temperature range from 25C to 85C, Capacitance change of 10%  X5R Characteristics: Temperature range from 55C to 85C, Capacitance change of 15%  X7R Characteristics: Temperature range from 55C to 125C, Capacitance change of 15% The recommended capacitor’s tolerable voltage is twice as large as the voltage of use (C1: Input voltage, C2: Output voltage). The upper limit of the capacitance value for C2 is 100F. However, the increase of C2 leads to the increase of inrush current. Refer to CONSTANT SLOPE CIRCUIT for detailed information. PCB Layout Make VDD and GND lines sufficient. If their impedance is high, noise pickup or unstable operation may result. Connect a capacitor C1 with a capacitance value as much as 10μF or more between VDD and GND pin, and as close as possible to the pins. Set external components, especially the output capacitor C2, as close as possible to the ICs and make wiring as short as possible. Transient Response When using the Adjustable Output Voltage Type, the transient response could be affected by the external resistors. Evaluate the circuit taking the actual conditions of use into account. 8 RP108J NO.EA-203-201216 ADUSTABLE OUTPUT VOLTAGE TYPE SETTINGS  Output Voltage Setting Method RP108J081x can be adjusted the output voltage by using the external divider resistors. If the VFB voltage fixed into the IC is described as SetVFB, the output voltage can be set by using the following equations SetVFB is equal to 0.8V. The VOUT pin of RP108J081x should be connected to the VFB pin. VOUT R1 I1 VFB RIC GND VOUT IIC R2 I2 SetVFB I1IIC I2 .................................................................................................................................. (1) I2 SetVFB / R2......................................................................................................................... (2) Thus, I1IIC  SetVFB /R2.................................................................................................................... (3) Therefore, VOUT SetVFB R1 I1 ............................................................................................................ (4) Put Equation (3) into Equation (4), then VOUT ........................................................................................................................................................ SetVFB R1(IIC  SetVFB / R2)  SetVFB (1+R1R2) R1 IIC....................................................................................... (5) In Equation (5), R1x IIC is the error-causing factor in VOUT. As for IIC, IIC SetVFB / RIC ........................................................................................................................ (6) Therefore, the error-causing factor R1x IIC can be described as follows. R1IIC .................................................................................................................................................................................... R1  SetVFB / RIC  SetVFB R1 / RIC ......................................................................................................... (7) For better accuracy, choosing R1 (