HE2240A50HPR

HE2240 series 250mA Low Power LDO Features  High input voltage (up to 40V)  Good Transient Response  Low Power Consumption: 1.4µA (Typ)  Output voltage accuracy: tolerance ±2%  Maximum Output Current: 250mA  SOT23-3 and SOT89 package  Voltage drop:350mV@100mA  PSRR:80dB@1KHz Applications  Battery-powered equipment  Audio/Video equipment  Communication equipment  Home Automation General Description The HE2240 ultra-low quiescent current regulator features low dropout voltage and low current in the standby mode. With less than 1.4μA quiescent current at no load, the HE2240 is ideally suited for standby micro-control-unit systems, especially for always-on applications like E-meters, fire alarms, smoke detectors and other battery operated systems. The HE2240 retains all of the features that are common to low dropout regulators including a low dropout PMOS pass device, short circuit protection, and thermal shutdown. The device is available in fixed output voltages of 3.0,3.3,3.6,4.0 and 5.0V.The device features integrated short-circuit 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 HE2240Axx 3.0V HE2240Axx 3.3V HE2240Axx 3.6V HE2240Axx 4.0V HE2240Axx 5.0V Package Marking SOT89 AFXX SOT23-3L AZXX Note: ”XX” stands for output voltages. SOT23-3 & SOT89 packages will add a “B” mark at the end of the marking. Ver1.2 1 Aug 3,2018 HE2240 series 250mA Low Power LDO Order Information HE2240A①②③④⑤ Designator 1 ② ③ Symbol Integer H ④ ⑤ Description Output Voltage(3.0~5.0V) Standard P Package:SOT89-3 PB Package:SOT89B-3 M Package:SOT23-3 MB Package:SOT23B-3 R G RoHS / Pb Free Halogen Free Block Diagram Application Circuits HE2240Axx Ver1.2 2 Aug 3,2018 HE2240 series 250mA Low Power LDO Pin Assignment SOT89B (TOP view) SOT23B-3 (TOP view) Absolute Maximum Ratings Supply Voltage ................................-0.3V to 40V Storage Temperature ..................-50℃ to 125℃ Operating Temperature .................-40℃ to 85℃ Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maximum Ratings” may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Thermal Information Symbol Parameter Package Max. Unit SOT23 500 ℃/W θJA Thermal Resistance (Junction to Ambient) (Assume no ambient airflow, no heat sink) SOT89 200 ℃/W SOT23 0.20 W SOT89 0.50 W PD Power Dissipation Note: PD is measured at Ta= 25℃ Ver1.2 3 Aug 3,2018 HE2240 series 250mA Low Power LDO Electrical Characteristics (Test Conditions:VIN=12V, VOUT=Vset,CIN=10uF, COUT=10uF,TA=25℃, unless otherwise specified.) Parameter Symbol Input Voltage VIN Supply Current IQ Output Voltage HE2240 VOUT2 Maximum Output Current IOUT(Max) VDROP VOUT=3.0V Dropout Voltage VDROP VOUT=3.3V VDROP VOUT=5.0V Line Regulation ΔVOUT/ ΔVIN•VOUT Load Regulation ΔVOUT Enable pin pull high current EN Threshold Voltage Conditions Min Typ Max Units 3.0 — 40 V — 1.4 3.0 uA Vset*0.98 Vset Vset*1.02 V — 250 — — mA IOUT=250mA IOUT=100mA — — 900 380 — — IOUT=250mA IOUT=100mA IOUT=250mA — — — 820 350 800 — — — IOUT=100mA IOUT=10mA (Vset+1.0v)≦VIN≦38V VIN=10V 1mA≦IOUT≦100mA — 320 — — 0.1 — %/V — 30 — mV 0.3 uA VIN=12V ILOAD=0mA VIN=12V IOUT=10mA IEN VIL VIH Shutdown Start-Up VIN=12V VOUT=3.3V f=1KHz,IOUT= 10mA mV — 0.9 — — 0.4 — V V — 80 — dB VIN=12V VOUT=3.3V f=10KHz,IOUT= 10mA — 60 — dB Power Supply Rejection Rate PSRR Short Current ISHORT RL=1Ω — 42 — mA Output Noise Voltage eNO IOUT=50mA BW = 300Hz~50kHz — 50 — uVRMS IOUT=10mA — 100 — ppm/℃ Output Voltage Temperature Coefficient Ver1.2 ΔVOUT/ ΔT•VOUT 4 Aug 3,2018 HE2240 series 250mA Low Power LDO Typical Characteristics (VIN=12V, IOUT=1mA, VOUT=3.3V, CIN=COUT=1uF, TJ=25℃, unless otherwise specified) Vout vs Vin IQ vs Vin Vout vs Load Dropout vs Load PSRR vs. Frequency (VIN=9V, VOUT=3.3V) Ver1.2 5 Vout Load Transient (0 to 50mA) Aug 3,2018 HE2240 series 250mA Low Power LDO Vout Load Transient (50 to 250mA) Vout Load Transient (1 to 250mA) Vout Short to GND Vin Start up H E 2 0 2 1 A x x Layout Consideration By placing input and output capacitors on the same side of the PCB as the LDO, and placing them as close as is practical to the package can achieve the best performance. The ground connections for input and output capacitors must be back to the HE2240 ground pin using as wide and as short of a copper trace as is practical.Connections using long trace lengths, narrow trace widths, and/or connections through via must be avoided. These add parasitic inductances and resistance that results in worse performance especially during transient conditions. Ver1.2 6 Aug 3,2018 HE2240 series 250mA 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 Ver1.2 7 Aug 3,2018 HE2240 series 250mA Low Power LDO Package Information 3-pin SOT23-3 Outline Dimensions Ver1.2 8 Aug 3,2018 HE2240 series 250mA Low Power LDO 3-pin SOT89 Outline Dimensions Ver1.2 9 Aug 3,2018