TJ4320GDP-ADJ

2A Ultra Low Dropout Linear Regulator TJ4320 FEATURES • Ultra Low Dropout Voltage • Compatible with low ESR MLCC as Input / Output Capacitor • Good Line and Load Regulation • Guaranteed Output Current of 2A • Available in SOP8, SOP8-PP, TO-252-5L Packages • Fixed Output: 1.0V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V • VOUT Power OK Signal • Programmable Soft-Start Function • Output Auto Discharge Function • Over-Temperature/Over-Current Protection SOP8 / SOP8-PP TO-252-5L APPLICATION • • • • • • • LCD TVs and SETTOP Boxes Battery Powered Equipment Motherboards and Graphic Cards Microprocessor Power Supplies Peripheral Cards High Efficiency Linear Regulators Battery Chargers ORDERING INFORMATION Device Package TJ4320GD-ADJ SOP8 TJ4320GD-X.X TJ4320GDP-ADJ DESCRIPTION The TJ4320 series of high performance ultra-low dropout linear regulators operates from 2.5V to 5.5V 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 TJ4320 is developed on a CMOS process technology which allows low quiescent current operation independent of output load current. This CMOS process also allows the TJ4320 to operate under extremely low dropout conditions. SOP8-PP TJ4320GDP-X.X TJ4320GRS-ADJ TO-252-5L X.X = Output Voltage = 1.0, 1.2, 1.5, 1.8, 2.5, and 3.3 ABSOLUTE MAXIMUM RATINGS (Note 1) CHARACTERISTIC SYMBOL MIN. MAX. UNIT Input Supply Voltage (Survival) VIN - 6.5 V Maximum Output Current IMAX - 2 A Lead Temperature (Soldering, 5 sec) TSOL 260 ºC Storage Temperature Range TSTG -65 150 ºC Operating Junction Temperature Range TJOPR -40 125 ºC ƟJA-SOP8-PP Package Thermal Resistance * 68 ºC/W * Calculated from package in still air, mounted to 2.6mm X 3.5mm(minimum foot print) 2 layer PCB without thermal vias per JESD51 standards Dec. 2015 – Rev 1.0 1/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 OPERATING RATINGS (Note 2) CHARACTERISTIC SYMBOL MIN. MAX. UNIT VIN 2.5 5.5 V Recommend Operating Input Voltage ORDERING INFORMATION VOUT ADJ Package Order No. SOP8 TJ4320GD-ADJ SOP8-PP TJ4320GDP-ADJ TO-252-5L TJ4320GRS-ADJ-5L SOP8 TJ4320GD-1.0 SOP8-PP TJ4320GDP-1.0 SOP8 TJ4320GD-1.2 SOP8-PP TJ4320GDP-1.2 SOP8 TJ4320GD-1.5 SOP8-PP TJ4320GDP-1.5 SOP8 TJ4320GD-1.8 SOP8-PP TJ4320GDP-1.8 SOP8 TJ4320GD-2.5 SOP8-PP TJ4320GDP-2.5 SOP8 TJ4320GD-3.3 SOP8-PP TJ4320GDP-3.3 1.0V 1.2V 1.5V 1.8V 2.5V 3.3V Description 2A, Adjustable, Enable, Soft Start, Power Good 2A, Adjustable, Enable, Soft Start, Power Good 2A, Adjustable, Enable 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good 2A, Enable, Soft Start, Power Good Package Marking Status TJ4320G Contact Us TJ4320G Active TJ4320G Active TJ4320G 1.0 Contact Us TJ4320G 1.0 Contact Us TJ4320G 1.2 Contact Us TJ4320G 1.2 Contact Us TJ4320G 1.5 Contact Us TJ4320G 1.5 Contact Us TJ4320G 1.8 Contact Us TJ4320G 1.8 Contact Us TJ4320G 2.5 Contact Us TJ4320G 2.5 Contact Us TJ4320G 3.3 Contact Us TJ4320G 3.3 Contact Us T J4320 GD P–ADJ – 5L Lead Count: 5L (Applied for TO252 only) Output Voltage: ADJ / 1.0V / 1.2V / 1.5V / 1.8V / 2.5V / 3.3V Package Type D : SOP8 DP : SOP8-PP RS : TO252 Material Class G : Halogen Free Root Name Product Code Dec. 2015 – Rev 1.0 2/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 PIN CONFIGURATION POK 1 8 GND EN 2 POK 1 7 ADJ EN 2 8 GND 5 ADJ 7 ADJ 4 VOUT PAD VIN 3 6 VOUT VIN 3 6 VOUT N.C 4 5 SS N.C 4 5 SS SOP8 T A B 3 GND 2 VIN 1 EN SOP8-PP TO-252-5L PIN DESCRIPTION Pin No. Pin Name Pin Function SOP8 SOP8-PP TO-252-5L 1 1 - POK 2 2 1 EN Chip Enable. Pulling this pin below 0.4V turns the regulator off. Do not float. 3 3 2 VIN Input Supply. 4 4 - N.C No connection. 5 5 - SS Soft-Start. Connect a capacitor between this pin and the ground. Do not connect to ground. 6 6 4 VOUT 7 7 5 ADJ Output Adjust. 8 8 3 GND Ground. - PAD TAB Thermal Exposed PAD / TAB Dec. 2015 – Rev 1.0 3/20 Power OK Indication. This pin is an open-drain output and is set high impedance once VOUT reaches 92% of its rating voltage. Output Voltage. Connect to ground. HTC 2A Ultra Low Dropout Linear Regulator TJ4320 BLOCK DIAGRAM VIN EN Enable Bandgap Reference Over Current Protection SS ADJ VOUT Thermal Protection Auto Discharge POK Power OK GND Dec. 2015 – Rev 1.0 4/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 TYPICAL APPLICATION R3 10K C1 10nF VEN VIN EN POK VIN VOUT VOUT CFF ADJ SS CIN R2 2.2nF GND 10μF COUT R1 CSS 220pF 10μF VIN2 R3 10K C1 10nF VEN VIN EN POK VIN VOUT VOUT CFF ADJ SS CIN R2 2.2nF GND 10μF COUT R1 CSS 220pF VEN EN POK VIN VOUT 10μF R3 10K VIN VOUT CFF ADJ SS CIN 2.2nF GND 10μF COUT R1 CSS 220pF VEN VIN EN POK VIN VOUT ADJ SS CIN R2 2.2nF GND 10μF COUT R1 CSS 220pF 5/20 10μF VOUT CFF Dec. 2015 – Rev 1.0 R2 10μF HTC 2A Ultra Low Dropout Linear Regulator TJ4320 ELECTRICAL CHARACTERISTICS (Note 3) 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 4) = VO(NOM) + 1 V, IL = 10 mA, CIN = 10 μF, COUT = 10 μF, 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 % 0.588 0.582 0.6 0.612 0.618 V Line Regulation(Note 5) ΔVLINE VOUT+1 V < VIN < 5.5 V - 0.25 - %/V Load Regulation(Note 5, 6) ΔVLOAD 10 mA < IL < 2 A - 0.20 - % IL = 200 mA - 45 55 65 Dropout Voltage(Note 7) VDROP mV IL = 2 A - 400 500 600 IL = 200 mA - 0.20 0.30 0.40 IL = 2 A - 0.30 0.40 0.60 VEN < 0.2 V, POK=Open - 0.1 1 f = 1kHz - 45 - f = 1kHz, CFF = 1μF - 60 - TSD - - 165 - ºC Thermal Shutdown Hysteresis ΔTSD - - 20 - ºC OCP Threshold Level IOCP - - 3.6 - A Power OK Threshold VPOKTH - - 92 - % Power OK Hysteresis VPOKHYS - - 7 - % RDS VIN = 5V, VEN = 0V - 330 - Ω Logic Low VIL Output = Low - - 0.4 V Logic High VIH Output = High 2.0 - - V IEN VEN = VIN - 0.1 1 μA Ground Pin Current(Note 8) Ground Pin Current(Note 9) Power Supply Rejection Ratio Thermal Shutdown Temperature Auto Discharge Resistance IGND IGND_OFF mA PSRR μA dB Enable threshold Enable Input Current Note 1. Exceeding the absolute maximum ratings may damage the device. Dec. 2015 – Rev 1.0 6/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 Note 2. The device is not guaranteed to function outside its operating ratings. Note 3. 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 4. The minimum operating value for input voltage is equal to either (VOUT,NOM + VDROP) or 2.5V, whichever is greater. Note 5. 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 6. 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 2A. Note 7. 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 8. Ground current, or quiescent current, is the difference between input and output currents. It's defined by I GND1 = 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 9. Ground current, or standby current, is the input current drawn by a regulator when the output voltage is disabled by an enable signal. APPLICATION INFORMATION Introduction TJ4320 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. Component Selection Input Capacitor A large bulk capacitance over than 10μF should be closely placed to the input supply pin of the TJ4320 to ensure that the input supply voltage does not sag. Also a minimum of 10μF 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 10μF should be very closely placed to the output voltage pin of the TJ4320. 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) VOUT VIN VIN VOUT RP CIN 10μF CC1 EN GND COUT SS CC2 10μF CSS 220pF Fig. 1. Application with Decoupling Capacitor, CC1 & CC2 Dec. 2015 – Rev 1.0 7/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 Feed-Forward Capacitor To get the higher PSRR than the inherent performance of TJ4320, 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 2.2nF to 1μF allows to achieve better PSRR performance when required by the application.(See Fig.2) VOUT VOUT VIN VIN CFF 2.2nF RP R2 ADJ COUT CIN CC1 EN GND 10μF CC2 10μF SS R1 CSS 220pF 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 100μsec, 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 100μsec or longer. VIN VOUT VIN VOUT CFF 2.2nF RP R2 ADJ COUT CIN 10μF EN 10μF GND Cdelay SS R1 CSS 220pF Fig. 3. Application with Delayed Start-Up Output Adjustment (Adjustable Version) An adjustable output device has output voltage range of 1.0V 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 1kΩ to 100kΩ. VIN VOUT VIN VOUT CFF 2.2nF R2 ADJ CIN 10μF VEN EN COUT 10μF GND SS R1 CSS 220pF VOUT R2 = R1 ( -1) 0.6 Fig. 4. Application for Adjustable Output Voltage Dec. 2015 – Rev 1.0 8/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 To enhance output stability, a feed-forward capacitor of 2.2nF to 1μF can be placed in series with VOUT and ADJ.(Refer to "Component Selection" Section) Soft Start Time The TJ4320 has an internal current source that charges an external slow start capacitor to implement a slow start time. Equation and Table 1 shows how to select a slow start capacitor based on an expected slow start time. The R is 450kΩ, VO is 0.6V and i(t) is 130nA. TSS (s) = -RCSS × ln i(t)R Vo CSS Calculated Soft-Start Time 220pF 0.23ms 470pF 0.49ms 1nF 1.04ms 2.7nF 2.82ms 5.6nF 5.86ms 10nF 10.4ms Table 1. Capacitor Values for the soft-start time Auto Discharge Function The TJ4320 provides an auto discharge function that is used for faster discharging of the output capacitor. This function is automatically activated when the EN input goes into an active low state. Maximum Output Current Capability The TJ4320 can deliver a continuous current of 2A 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 2A may be still undeliverable due to the restriction of the power dissipation of TJ4320. 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 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 (T Rmax) depends on the maximum ambient temperature (T Amax) Dec. 2015 – Rev 1.0 9/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 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 TJ4320 is available in SOP8, SOP8-PP, TO-252-5L packages. amount of copper area or heat sink, and on air flow. The thermal resistance depends on If proper cooling solution such as heat sink, copper plane area, or air flow is applied, the maximum allowable power dissipation could be increased. However, if the ambient temperature is increased, the allowable power dissipation would be decreased. SOP8-PP The graph above is valid for the thermal impedance specified in the Absolute Maximum Ratings section on page 1. Dec. 2015 – Rev 1.0 10/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 The θJA could be decreased with respect to the copper plane area. So, the specification of maximum power dissipation for an application is fixed, the proper plane area could be estimated by following graphs. Wider copper plane area leads lower θJA. SOP8-PP The maximum allowable power dissipation is also influenced by the ambient temperature. With the θJACopper plane area relationship, the maximum allowable power dissipation could be evaluated with respect to the ambient temperature. As shown in graph, the higher copper plane area leads θJA. And the higher ambient temperature leads lower maximum allowable power dissipation. Dec. 2015 – Rev 1.0 11/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 TYPICAL OPERATING CHARACTERISTICS Test Circuit 10nF POK VOUT VOUT Cff 10K VIN R2 ADJ VIN 10μF 10K EN SS GND R1 10μF Css CDelay VOUT = 1.2V ( VIN = 2.5V, R1 = 10KΩ, R2 = 10KΩ ) VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) VIN VIN VOUT VOUT VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 1.2V ( Css = 220pF, Cff = 10nF ) VOUT = 1.2V ( Css = 220pF, Cff = 10nF ) VIN VIN VOUT VOUT VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=0A Start Up @ Iout=2A Dec. 2015 – Rev 1.0 12/20 HTC 2A Ultra Low Dropout Linear Regulator VOUT = 1.2V ( Css = 220pF, Cff = 1μF ) TJ4320 VOUT = 1.2V ( Css = 220pF, Cff = 1μF ) VIN VIN VOUT VOUT VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 1.2V ( Cff = 10nF ) VOUT = 1.2V ( Cff = 10nF ) VIN VIN VOUT VOUT VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 1.2V ( Cff = 1μF ) VOUT = 1.2V ( Cff = 1μF ) VIN VIN VOUT VOUT VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=0A Start Up @ Iout=2A Dec. 2015 – Rev 1.0 13/20 HTC 2A Ultra Low Dropout Linear Regulator VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) TJ4320 VOUT = 1.2V ( Css : varied, Cff = 2.2nF ) VIN VIN VOUT without Css VOUT POK 1nF 5.6nF 10nF VIN : 2.0V/div, VOUT : 1.0V/div, POK : 2.0V/div, Time : 1ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=2A Start Up @ Iout=10mA VOUT = 1.2V ( Cff : varied, Css = 220pF ) VOUT = 1.2V ( Cff : varied ) VIN VIN VOUT without Cff 100nF VOUT 1μF 10nF 100nF 1μF VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up @ Iout=10mA Start Up @ Iout=10mA VOUT = 1.2V ( Cdelay : varied, Css = 220pF, Cff = 2.2nF ) VOUT = 1.2V ( Cdelay : varied, Cff = 10nF ) VIN VIN 220nF without Cdelay 220nF without Cdelay 1μF VEN VOUT 1μF VEN without Cdelay 220nF VOUT 1μF without Cdelay 220nF 1μF VIN : 2.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div VIN : 2.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 10ms/div Start Up with Cdelay @ Iout=10mA Start Up with Cdelay @ Iout=10mA Dec. 2015 – Rev 1.0 14/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) VIN VIN VEN VEN VOUT VOUT VIN : 1.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 5ms/div VIN : 1.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 5ms/div Start Up by External VEN @ Iout=0A Start Up by External VEN @ Iout=2A VOUT = 1.2V ( Cff = 10nF ) VOUT = 1.2V ( Cff = 10nF ) VIN VIN VEN VEN VOUT VOUT VIN : 1.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 5ms/div VIN : 1.0V/div, VEN : 1.0V/div, VOUT : 1.0V/div, Time : 5ms/div Start Up by External VEN @ Iout=0A Start Up by External VEN @ Iout=2A VOUT = 1.2V ( Css = 220pF, Cff = 2.2nF ) VOUT = 1.2V ( Cff = 10nF ) IOUT IOUT VOUT VOUT IOUT : 1.0A/div, VOUT : 100mV/div, Time : 500μs/div IOUT : 1.0A/div, VOUT : 100mV/div, Load Transient Response Dec. 2015 – Rev 1.0 Time : 500μs/div Load Transient Response 15/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 VOUT = 3.3V ( VIN = 4.3V, R1 = 10KΩ, R2 = 45KΩ ) VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VIN VIN VOUT VOUT VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 3.3V ( Css = 220pF, Cff = 10nF ) VOUT = 3.3V ( Css = 220pF, Cff = 10nF ) VIN VIN VOUT VOUT VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 3.3V ( Css = 220pF, Cff = 1μF ) VOUT = 3.3V ( Css = 220pF, Cff = 1μF ) VIN VIN VOUT VOUT VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div Start Up @ Iout=0A Start Up @ Iout=2A Dec. 2015 – Rev 1.0 16/20 HTC 2A Ultra Low Dropout Linear Regulator VOUT = 3.3V ( Cff = 10nF ) TJ4320 VOUT = 3.3V ( Cff = 10nF ) VIN VIN VOUT VOUT VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 3.3V ( Cff = 1μF ) VOUT = 3.3V ( Cff = 1μF ) VIN VIN VOUT VOUT VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 20ms/div Start Up @ Iout=0A Start Up @ Iout=2A VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VOUT = 3.3V ( Css : varied, Cff = 2.2nF ) VIN VIN VOUT 1nF VOUT POK without Css 5.6nF 10nF VIN : 2.0V/div, VOUT : 2.0V/div, POK : 2.0V/div, Time : 1ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 10ms/div Start Up @ Iout=2A Start Up @ Iout=10mA Dec. 2015 – Rev 1.0 17/20 HTC 2A Ultra Low Dropout Linear Regulator VOUT = 3.3V ( Cff : varied, Css = 220pF ) TJ4320 VOUT = 3.3V ( Cff : varied ) VIN VIN 100nF without Cff VOUT 100nF VOUT 1μF 10nF 1μF VIN : 2.0V/div, VOUT : 2.0V/div, Time : 50ms/div VIN : 2.0V/div, VOUT : 2.0V/div, Time : 50ms/div Start Up @ Iout=10mA Start Up @ Iout=10mA VOUT = 3.3V ( Cdelay : varied, Css = 220pF, Cff = 2.2nF ) VOUT = 3.3V ( Cdelay : varied, Cff = 10nF ) VIN VIN without Cdelay 220nF without Cdelay 1μF VEN 220nF 1μF VEN 220nF without Cdelay VOUT 220nF 1μF VOUT without Cdelay 1μF VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 10ms/div VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 10ms/div Start Up with Cdelay @ Iout=10mA Start Up with Cdelay @ Iout=10mA VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VIN VIN VEN VEN VOUT VOUT VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 5ms/div VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 5ms/div Start Up by External VEN @ Iout=0A Start Up by External VEN @ Iout=2A Dec. 2015 – Rev 1.0 18/20 HTC 2A Ultra Low Dropout Linear Regulator VOUT = 3.3V ( Cff = 10nF ) TJ4320 VOUT = 3.3V ( Cff = 10nF ) VIN VIN VEN VEN VOUT VOUT VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 5ms/div VIN : 2.0V/div, VEN : 2.0V/div, VOUT : 2.0V/div, Time : 5ms/div Start Up by External VEN @ Iout=0A Start Up by External VEN @ Iout=2A VOUT = 3.3V ( Css = 220pF, Cff = 2.2nF ) VOUT = 3.3V ( Cff = 10nF ) IOUT IOUT VOUT VOUT IOUT : 1.0A/div, VOUT : 100mV/div, Time : 500μs/div IOUT : 1.0A/div, VOUT : 100mV/div, Load Transient Response Time : 500μs/div Load Transient Response 450 VOUT=2.5V DROPOUT VOLTAGE [mV] 400 VOUT=3.3V 350 300 250 200 150 100 50 0 0 0.5 1 1.5 2 OUTPUT CURRENT [A] Dropout Voltage Dec. 2015 – Rev 1.0 19/20 HTC 2A Ultra Low Dropout Linear Regulator TJ4320 REVISION NOTICE The description in this data sheet can be revised without any notice to describe its electrical characteristics properly. Dec. 2015 – Rev 1.0 20/20 HTC