HE2028A50FR

HE2028 series 800mA Low Power LDO Features  Good Transient Response  High input voltage (up to 50V)  Output voltage accuracy: tolerance ±2%  Low Power Consumption: 2µA (Typ)  SOT223-3L，and TO252-3L package  Maximum Output Current: 800mA  PSRR:85dB@1KHz  Voltage drop:360mV@100mA(3.3V) Applications  Portable, Battery Powered Equipmpm  Audio/Video equipment  Microcontroller Applications  Weighting Scales  Smoke detector and sensor  Home Automation General Description The HE2028 series is a high voltage，ultralow-power，low dropout voltage regulator. The device can deliver 800mA output current with a dropout voltage of 360mV and allows an input voltage as high as 50V. The typical quiescent current is only 2µA. The device is available in fixed output voltages of 3.3 and 5.0V.The device features integrated shortcircuit and thermal shutdown protection.Although designed primarily as fixed voltage regulators, the device can be used with external components to obtain variable voltages. Selection Table Part No. Output Voltage Package HE2028A33FR 3.3V SOT223 HE2028A50FR 5.0V SOT223 HE2028A33GR 3.3V TO252 HE2028A50GR 5.0V TO252 Marking Application Circuits HE2028Axx Ver1.1 1 Aug 3,2021 HE2028 series 800mA Low Power LDO Pin Assignment SOT223 (Top View) VIN TO252 (Top View) GND GND Mark Mark GND VOUT VIN VOUT Functional Block Diagrara Ver1.1 2 Aug 3,2021 HE2028 series 800mA Low Power LDO Absolute Maximum Ratings (1) (2) Parameter Symbol Maximum Rating Unit VIN VSS -0.3~VSS+50.0 V VOUT VSS -0.3~VSS+6.0 V IOUT 800 mA Input Voltage Output Current Power Dissipation Thermal Resistance SOT223-3L 1200 Pd TO252-3L SOT223-3L RθJA TO252-3L mW 1800 (3) 200 ℃/W 150 ℃/W Operating Temperature Topr -40~85 ℃ Storage Temperature Tstg -40~125 ℃ Soldering Temperature & Time Tsolder 260℃, 10s Note (1): Exceeding these ratings may damage the device. Note (2): The device is not guaranteed to function outside of its operating conditions Note (3): The package thermal impedance is calculated in accordance to JESD 51-7. ESD Ratings Item Description Value Unit V(ESD-HBM) Human Body Model (HBM) ANSI/ESDA/JEDEC JS-001-2014 Classification, Class: 2 ±4000 V V(ESD-CDM) Charged Device Mode (CDM) ANSI/ESDA/JEDEC JS-002-2014 Classification, Class: C0b ±200 V JEDEC STANDARD NO.78E APRIL 2016 Temperature Classification, Class: I ±150 mA ILATCH-UP ESD testing is performed according to the respective JESD22 JEDEC standard.The human body model is a 100 pF capacitor discharged through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. Recommended Operating Conditions Parameter MIN. MAX. Units Supply voltage at VIN --- 30 V Operating junction temperature range, Tj -40 125 °C Operating free air temperature range, TA -40 85 °C Note : All limits specified at room temperature (TA = 25°C) unless otherwise specified. All room temperature limits are 100% production tested. All limits at temperature extremes are ensured through correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Ver1.1 3 Aug 3,2021 HE2028 series 800mA Low Power LDO Electrical characteristics （At TA=25°C, CIN=1uF, VIN=VOUTNOM+1.0V, COUT=10µF, unless otherwise noted） Min Typ. Max Units 3.0 — 50 V VIN=12V No load — 2.0 5.0 μA VIN=12V IOUT =10mA -2.0 +2.0 % VIN=0V — — 0.1 μA — — 0.1 μA — 800 — mA IOUT =10mA VIN = VOUTNOM-0.1V — 36 — mV IOUT =100mA VIN = VOUTNOM-0.1V — 360 — mV ΔLOAD Load Regulation VIN= VOUT +1V 1mA≤IOUT≤100mA — 40 — mV ΔLINE Line Regulation IOUT=1mA, VOUTNOM +0.5V≤VIN≤50V — 0.01 — %/V PSRR Power Supply Rejection Ratio VIN=12V , IOUT =10mA f=1KHz, VOUT =3.3V — 85 — dB Symbol VIN IQ Parameter Input Voltage Quiescent Current VOUT Output Voltage ISD ILEAK Test Conditions Shutdown Ground Current VOUT Shutdown Leakage Current VOUT = 0V IOUT_MAX Output Current VDROP Dropout Voltage(1) VIH EN Threshold Voltage,Logic-High VIN=5.0V, IOUT=1mA 1.0 — — V VIL EN Threshold Voltage,Logic-Low VIN=5.0V — — 0.4 V 300 450 — mA ILIMIT Current Limit VIN= VOUT +1V ISHORT Short /Start Load Current RL=1 eNO Output Noise Voltage TSD ΔTSD 10Hz to 100kHz 100 mA — 100 — μVRMS Thermal Shutdown Temperature — 150 — ℃ Thermal Shutdown Hysteresis — 20 — ℃ COUT=1µF Note：*1 Dropout Voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value. Ver1.1 4 Aug 3,2021 HE2028 series 800mA Low Power LDO Typical Performance Ch Cha aracteristics: Test Condition: TA=25°C,Iout=1mA, A, C COUT=10uF, unless otherwise noted Ver1.1 5 Aug 3,2021 HE2028 series 800mA Low Power LDO Line Transient Response (VIN=5 to 24V VOUT=3.3V) Line Transient Response (VIN=24 to 5V VOUT=3.3V) 3.3V VOUT 3.3V 24V VIN 24V VOUT 0V 5V 5V VIN 0V 0V Time(4us/div) Load Transient Response （VIN=5V VOUT=0V IOUT=140mA） Time(4us/div) Load Transient Response （VIN=5V VOUT=0V IOUT=140-0mA） 140mA 140mA IOUT 0A 0V VOUT 0A IOUT 0V VOUT -280mV 5V VIN 5V VIN 0V 5V 0V Time(20us/div) Start Up （VIN=24V VOUT=3.3V） Start Up Time(20us/div) （VIN=24V VOUT=3.3V IOUT=150mA） IOUT 150mA VOUT 3.3V VOUT 0mA H E 2 0 2 1 A x x 0V 24V 24V VIN VIN 0V 0V Time(100us/div) Time(100us/div) Short Circuit Protection （VIN=6V VOUT= short to 3.3V Short Circuit Protection （VIN=5V VOUT=3.3V to short） 3.3V 3.3V VOUT VOUT 0V 500mA 500mA IOUT 0mA VIN 5V 0V 0mA IOUT 6V VIN 0V 0V Time(20ms/div) Ver1.1 Time(20ms/div) 6 Aug 3,2021 HE2028 series 800mA Low Power LDO Application Guideline Input Capacitor A 10μF ceramic capacitor is recommended to connect between VDD and GND pins to decouple input power supply glitch and noise. The amount of the capacitance may be increased without limit. This input capacitor must be located as close as possible to the device to assure input stability and less noise. For PCB layout, a wide copper trace is required for both VIN and GND. Output Capacitor An output capacitor is required for the stability of the LDO. The recommended output capacitance is 10μF, ceramic capacitor is recommended, and temperature characteristics are X7R or X5R. Higher capacitance values help to improve load/line transient response. The output capacitance may be increased to keep low undershoot/overshoot. Place output capacitor as close as possible to VOUT and GND pins. Dropout Voltage The dropout voltage refers to the voltage difference between the VIN and VOUT pins while operating at specific output current. The dropout voltage VDROP also can be expressed as the voltage drop on the pass-FET at specific output current (IRATED) while the pass-FET is fully operating at ohmic region and the pass-FET can be characterized asan resistance RDS(ON). Thus the dropout voltage can bedefined as (VDROP = VIN − VOUT = RDS(ON) x IRATED). Fornormal operation, the suggested LDO operating range is (VIN > VOUT + VDROP) for good transient response and PSRR ability. Vice versa, while operating at the ohmic region will degrade the performance severely. Thermal Application For continuous operation, do not exceed the absolute maximum junction temperature. The maximum power dissipation depends on the thermal resistance of the IC package, PCB layout, rate of surrounding airflow, and difference between junction and ambient temperature. The maximum power dissipation can be calculated as below: TA=25°C, PCB, The max PD= (125°C − 25°C) / (Thermal Resistance °C/W) Power dissipation (PD) is equal to the product of the output current and the voltage drop across the output pass element, as shown in the equation below: PD = (VIN – VOUT) × IOUT Ver1.1 7 Aug 3,2021 HE2028 series 800mA Low Power LDO ■ PACKAGING INFORMATION(Continued) Ver1.1 8 Aug 3,2021 HE2028 series 800mA Low Power LDO ■ PACKAGING INFORMATION Ver1.1 9 Aug 3,2021