300mA Ultra Low Dropout Linear Regulator TJ4203 FEATURES • • • • • • • • • SOT23-5L Ultra Low Dropout Voltage Compatible with low ESR MLCC as Input/Output Capacitor Good Line and Load Regulation Guaranteed Output Current of 300mA Available in SOT23-5L, DFN2X2-6L and SC70-5L Fixed Output Voltages : 1.0V, 1.2V, 1.8V, 2.5V, and 3.3V SENSE Option Improves Load Regulation Over-Temperature/Over-Current Protection -40 ºC to 125 ºC Junction Temperature Range DFN2X2-6L APPLICATION • • • • • • • LCD TVs and SETTOP Boxes Battery Powered Equipments Motherboards and Graphic Cards Microprocessor Power Supplies Peripheral Cards High Efficiency Linear Regulators Battery Chargers SC70-5L DESCRIPTION The TJ4203 series of high performance ultra-low dropout linear regulators operates from 2.5V to 6V input supply and provides ultra-low dropout voltage, high output current with low ground current. Wide range of preset output voltage options are available. These ultra-low dropout linear regulators respond fast to step changes in load which makes them suitable for low voltage micro-processor applications. The TJ4203 is developed on a CMOS process technology which allows low quiescent current operation independent of output load current. This CMOS process also allows the TJ4203 to operate under extremely low dropout conditions. ORDERING INFORMATION Device Package TJ4203GSF5-ADJ SOT23-5L TJ4203GSF5-X.X TJ4203GQ-ADJ TJ4203GQ-X.X DFN2X2-6L TJ4203GTF5-ADJ SC70-5L TJ4203GTF5-X.X X.X = Output Voltage = 1.0, 1.2, 1.8, 2.5, and 3.3 Absolute Maximum Ratings CHARACTERISTIC SYMBOL MIN. MAX. UNIT VIN - 6.5 V Enable Input Voltage (Survival) VEN - 6.5 V Maximum Output Current IMAX - 300 mA Input Supply Voltage (Survival) Lead Temperature (Soldering, 5 sec) TSOL 260 ºC Storage Temperature Range TSTG -65 150 ºC Operating Junction Temperature Range TJOPR -40 125 ºC Apr. 2011 – Rev.1.0 1/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 Ordering Information VOUT ADJ 1.0V 1.2V 1.8V 2.5V 3.3V Package Order No. Description Package Marking Status SOT23-5L TJ4203GSF5-ADJ 300mA, Adjustable, Enable 03GAD Contact Us DFN2X2-6L TJ4203GQ-ADJ 300mA, Adjustable, Enable 03GAD Contact Us SC70-5L TJ4203GTF-ADJ 300mA, Adjustable, Enable 03GAD Contact Us SOT23-5L TJ4203GSF5-1.0 300mA, Enable 03G10 Contact Us DFN2X2-6L TJ4203GQ-1.0 300mA, Enable 03G10 Contact Us SC70-5L TJ4203GTF-1.0 300mA, Enable 03G10 Contact Us SOT23-5L TJ4203GSF5-1.2 300mA, Enable 03G12 Contact Us DFN2X2-6L TJ4203GQ-1.2 300mA, Enable 03G12 Contact Us SC70-5L TJ4203GTF-1.2 300mA, Enable 03G12 Contact Us SOT23-5L TJ4203GSF5-1.8 300mA, Enable 03G18 Contact Us DFN2X2-6L TJ4203GQ-1.8 300mA, Enable 03G18 Contact Us SC70-5L TJ4203GTF-1.8 300mA, Enable 03G18 Contact Us SOT23-5L TJ4203GSF5-2.5 300mA, Enable 03G25 Contact Us DFN2X2-6L TJ4203GQ-2.5 300mA, Enable 03G25 Contact Us SC70-5L TJ4203GTF-2.5 300mA, Enable 03G25 Contact Us SOT23-5L TJ4203GSF5-3.3 300mA, Enable 03G33 Contact Us DFN2X2-6L TJ4203GQ-3.3 300mA, Enable 03G33 Contact Us SC70-5L TJ4203GTF-3.3 300mA, Enable 03G33 Contact Us TJ 4203 Output Voltage : ADJ / 1.2V / 1.8V / 2.5V / 3.3V / 5.0V Package Type SF5 : SOT23-5L Q : DFN2X2-6L TF: SC70-5L Material Class G : Halogen Free Root Name Product Code Apr. 2011 – Rev.1.0 2/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 PIN CONFIGURATION SENSE/ADJ VOUT 3 4 5 EN 2 GND 1 VIN SENSE/ADJ 1 GND 2 EN 3 SOT23-5L Top view 6 VOUT 5 NC 4 VIN DFN2X2-6L SC70-5L PIN DESCRIPTION Pin No. SOT23-5L / SC70-5L DFN2X2-6L Name Function Name Function 1 VIN Input Supply SENSE/ADJ Remote Sense or Output Adjust 2 GND Ground GND Ground 3 EN Chip Enable EN Chip Enable 4 SENSE/ADJ Remote Sense or Output Adjust VIN Input Supply 5 VOUT Output Voltage NC No Internal Connection 6 - - VOUT Output Voltage Apr. 2011 – Rev.1.0 3/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 BASIC APPLICATION Typical 5 Pin Application VIN VOUT VIN CIN 1uF VOUT TJ4203 EN EN GND COUT 1uF SENSE 5 Pin Remote Load Sense Application VIN VIN CIN 1uF VOUT VOUT TJ4203 EN EN GND L O A D COUT 1uF SENSE Typical Adjustable Version Application VIN VIN CIN 1uF TJ4203 EN EN VOUT VOUT GND CFF R2 ADJ COUT 2.2uF R1 * TJ4203 can deliver a continuous current of 300mA over the full operating temperature. However, the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output current of 300mA may be still undeliverable. * See Application Information. Apr. 2011 – Rev.1.0 4/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 ELECTRICAL CHARACTERISTICS(Note 1) Limits in standard typeface are for TJ=25ºC, and limits in boldface type apply over the full operating temperature range. Unless otherwise specified: VIN(Note 2) = VO(NOM) + 1 V, IL = 10 mA, CIN = 1 uF, COUT = 1 uF, VEN = VIN - 0.3 V PARAMETER Output Voltage Tolerance Adjustable Pin Voltage (ADJ version) SYMBOL VO VADJ TEST CONDITION VOUT+1 V < VIN < 5.5 V 2.5 V < VIN < 5.5 V MIN. TYP. MAX. UNIT -2 -3 0 2 3 % 0.784 0.776 0.8 0.816 0.824 V Line Regulation(Note 3) ΔVLINE VOUT+1 V < VIN < 5.5 V - 0.15 0.40 %/V Load Regulation(Note 3, 4) ΔVLOAD 10 mA < IL < 300m A - 0.10 0.25 0.40 % IL = 30 mA - 30 45 55 (Note 5) Dropout Voltage VDROP Ground Pin Current(Note 6) Ground Pin Current(Note 7) Power Supply Rejection Ratio IL = 300 mA - 300 400 500 IL = 30 mA - 0.10 0.15 0.20 IL = 300 mA - 0.15 0.20 0.25 VEN < 0.2 V - 0.5 1 2 f = 1kHz - 55 - f = 1kHz, CFF = 0.1uF - 60 - IGND IGND_OFF PSRR mV mA uA dB Thermal Shutdown Temperature TSD - - 165 - ºC Logic Low VIL Output = Low - - 0.4 V Logic High VIH Output = High 2.0 - - V IEN VEN = VIN - 0.1 1 uA 500 - - mA Enable threshold Enable Input Current Over Current Limit ILIMIT - Note 1. Stresses listed as the absolute maximum ratings may cause permanent damage to the device. These are for stress ratings. Functional operating 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 possibly to affect device reliability. Note 2. The minimum operating value for input voltage is equal to either (VOUT,NOM + VDROP) or 2.5V, whichever is greater. Note 3. Output voltage line regulation is defined as the change in output voltage from the nominal value due to change in the input line voltage. Output voltage load regulation is defined as the change in output voltage from the nominal value due to change in load current. Note 4. Regulation is measured at constant junction temperature by using a 10ms current pulse. Devices are tested for load regulation in the load range from 10mA to 300mA. Note 5. Dropout voltage is defined as the minimum input to output differential voltage at which the output drops 2% below the nominal value. Dropout voltage specification applies only to output voltages of 2.5V and above. For output voltages below 2.5V, the dropout voltage is nothing but the input to output differential, since the minimum input voltage is 2.5V Note 6. Ground current, or quiescent current, is the difference between input and output currents. It's defined by IGND1 = IIN - IOUT under the given loading condition. The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 7. Ground current, or standby current, is the input current drawn by a regulator when the output voltage is disabled by an enable signal. Apr. 2011 – Rev.1.0 5/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 APPLICATION INFORMATION Introduction TJ4203 is intended for applications where high current capability and very low dropout voltage are required. It provides a simple, low cost solution that occupies very little PCB estate. Additional features include an enable pin to allow for a very low power consumption standby mode, an adjustable pin to provide a fully adjustable output voltage, and SENSE pin to provide better remote load regulation characteristics. Component Selection Input Capacitor : A minimum of 1uF ceramic capacitor is recommended to be placed directly next to the VIN Pin. It allows for the device being some distance from any bulk capacitor on the rail. Additionally, input droop due to load transients is reduced, improving load transient response. Additional capacitance may be added if required by the application.(See Fig.1) Output Capacitor : A minimum ceramic capacitor over than 1uF should be very closely placed to the output voltage pin of the TJ4203. Increasing capacitance will improve the overall transient response and stability. Decoupling (Bypass) Capacitor : In very electrically noisy environments, it is recommended that additional ceramic capacitors be placed from VIN to GND. The use of multiple lower value ceramic capacitors in parallel with output capacitor also allows to achieve better transient performance and stability if required by the application.(See Fig.1) Feed-Forward Capacitor To get the higher PSRR than the inherent performance of TJ4203, it is recommended that additional ceramic feed-forward capacitor be placed from VOUT pin to ADJ pin. The capacitance of feed-forward capacitor with range of 1nF to 100nF allows to achieve better PSRR performance when required by the application. In this case, over than 2.2uF output capacitor should be placed to the output voltage pin of the TJ4203.(See Fig.2) CC1 VIN EN GND TJ4203 RP COUT 1uF SENSE CIN 1uF CC2 CC1 VOUT VOUT VIN TJ4203 RP CIN 1uF VOUT VOUT VIN VIN EN GND CFF R2 COUT 2.2uF ADJ CC2 R1 Fig. 1. Application with Decoupling Capacitor, CC1 & CC2 Fig. 2. Application with Feed-Forward Capacitor, CFF Delayed Start-Up When power sequence control is required or rising time of input supply voltage is over than 100usec, it is recommended to apply delayed start-up by using Cdelay as shown in Fig. 3. It can adjust proper delay by Rp-Cdelay time constant. And also it can prevent any unexpected transient characteristics at output voltage when the rising time of input supply voltage is as long as 100usec or longer. VIN CIN 1uF TJ4203 EN VOUT VOUT VIN RP GND Cdelay CFF R2 COUT 2.2uF ADJ R1 Fig. 3. Application with Delayed Start-Up Apr. 2011 – Rev.1.0 6/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 Output Adjustment (Adjustable Version) An adjustable output device has output voltage range of 0.8V to 5.0V. The operating condition of VIN and the operating characteristics of VOUT depend on the dropout voltage performance in accordance with output load current. To obtain a desired output voltage, the following equation can be used with R1 resistor range of 100Ω to 50kΩ. VIN VIN TJ4203 CIN 1uF EN EN VOUT VOUT GND CFF R2 COUT 2.2uF ADJ R1 V R 2 R1 OUT 1 0. 8 Fig. 4. Application for Adjustable Output Voltage To enhance output stability, a feed-forward capacitor of 10nF to 1uF can be placed in series with VOUT and ADJ.(Refer to "Component Selection" Section) SENSE Pin In applications where the regulator output is not very close to the load, the TJ4203 can provide better remote load regulation characteristics using the SENSE pin. TJ4203 regulates the voltage at the output pin. Hence, the voltage at the remote load will be lower than the voltage at the output pin as a value of the voltage drop across the trace series resistance. If the sense option pin is not required, the sense pin must be connected to the VOUT pin. Connecting the sense pin to the remote load will provide regulation at the remote load because the TJ4203 regulates the voltage at the sense pin when the sense option pin is used. Fig. 5. Conventional Linear Regulator Application Fig.6. Remote Load Sense Application Maximum Output Current Capability The TJ4203 can deliver a continuous current of 300mA over the full operating junction temperature range. However, the output current is limited by the restriction of power dissipation which differs from packages. A heat sink may be required depending on the maximum power dissipation and maximum ambient temperature of application. With respect to the applied package, the maximum output current of 300mA may be still undeliverable due to the restriction of the power dissipation of TJ4203. Under all possible conditions, the junction temperature must be within the range specified under operating conditions. The temperatures over the device are given by: TC = TA + PD X θCA TJ = TC + PD X θJC TJ = TA + PD X θJA Apr. 2011 – Rev.1.0 7/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 where TJ is the junction temperature, TC is the case temperature, TA is the ambient temperature, PD is the total power dissipation of the device, θCA is the thermal resistance of case-to-ambient, θJC is the thermal resistance of junction-to-case, and θJA is the thermal resistance of junction to ambient. The total power dissipation of the device is given by: PD = PIN – POUT = (VIN X IIN)–(VOUT X IOUT) = (VIN X (IOUT+IGND)) – (VOUT X IOUT) = (VIN - VOUT) X IOUT + VIN X IGND where IGND is the operating ground current of the device which is specified at the Electrical Characteristics. The maximum allowable temperature rise (TRmax) depends on the maximum ambient temperature (TAmax) of the application, and the maximum allowable junction temperature (TJmax): TRmax = TJmax – TAmax The maximum allowable value for junction-to-ambient thermal resistance, θJA, can be calculated using the formula: θJA = TRmax / PD Apr. 2011 – Rev.1.0 8/10 HTC 300mA Ultra Low Dropout Linear Regulator TJ4203 TYPICAL OPERATING CHARACTERISTICS Test Circuit Vin VIN Cff 10K EN 1uF Vout VOUT R2 ADJ GND 2.2uF R1 CDelay Case 1 ( VIN = 3.3V, VOUT = 2.5V ) VIN : 2.0V/div, VIN : 1.0V/div, VOUT : 1.0V/div, Time : 500ms/div VIN : 2.0V/div, VOUT : 1.0V/div, Time : 500ms/div Start Up @ Iout=0A Start Up @ Iout=300mA (Cff=10nF, R2=51KΩ, R1=24KΩ) (Cff=10nF, R2=51KΩ, R1=24KΩ) VOUT : 1.0V/div, Time : 50ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 50ms/div Start Up @ Iout=0A Start Up @ Iout=300mA (Cff=1uF, R2=51KΩ, R1=24KΩ) (Cff=1uF, R2=51KΩ, R1=24KΩ) Apr. 2011 – Rev.1.0 9/10 HTC 300mA Ultra Low Dropout Linear Regulator VIN : 1.0V/div, VOUT : 1.0V/div, VIN : 20mV/div, VIN : 1V/div, Time : 50ms/div VIN : 2.0V/div, TJ4203 VOUT : 2.0V/div, Time : 5ms/div Start Up @ Iout=300mA Start Up @ Iout=10mA (Cff is varied, R2=51KΩ, R1=24KΩ) (Cff is varied, R2=51KΩ, R1=24KΩ) IOUT : 300mA/div, Time : 500us/div VIN : 20mV/div, IOUT : 300mA/div, Time : 500us/div Load Transient Response Load Transient Response (Cff =10nF, R2=51KΩ, R1=24KΩ) (Cff =10nF, R2=51KΩ, R1=24KΩ) VEN: 1V/div, VOUT : 1V/div, Time : 1ms/div VIN : 1V/div, VEN: 1V/div, VOUT : 1V/div, Time : 1ms/div Start Up @ Iout=0A Start Up @ Iout=300mA (Cff=10nF, R2=51KΩ, R1=24KΩ) (Cff=10nF, R2=51KΩ, R1=24KΩ) Apr. 2011 – Rev.1.0 10/10 HTC