ME6221CM5G

ME6221 400mA , Low Output Voltage 1.25V, Adjustable , High Speed LDO ME6221 Series General Description Features The ME6221 series are highly accurate, low  Voltage Setting via External Resistor：1.25V~5.0V noise, LDO Voltage Regulators .The output voltage  Maximum Output Current： 400mA can be set via the external resistor. On chip  Dropout Voltage： trimming adjusts the reference/output voltage to  125mV@ IOUT =100mA (Vout=3.3V) within ±2% accuracy. Internal protection features  Operating Voltage Range： 2.8V～18V consist of output current limiting, safe operating  Highly Accuracy： ±2％ area compensation, and thermal shutdown. The  Standby Current：45uA（TYP.） current limiter’s feedback circuit also operates as a  Line Regulation:：30mV（TYP.） short protect for the output current limiter and the  Temperature Stability≤0.5% output pin. The CE function allows the output of  Thermal Shutdown Protection：165℃ regulator to be turned off, resulting in greatly reduced power consumption. The ME6221 series can operate with up to 18V input. Package Applications     Consumer and Industrial Equipment Point of Regulation Switching Power Supply Post Regulation Hard Drive Controllers Battery Chargers V04 www.microne.com.cn ● 5-pin SOT23-5 Page 1 of 10 ME6221 Typical Application Circuit Fig.1 Fig.2 V04 VOUT  1.25V R1   VOUT  1.25  1    R2  www.microne.com.cn Page 2 of 10 ME6221 Selection Guide ME 6221X X X G Environment mark Package: M5-SOT23-5 Function Product Type Product Series Microne product series ME6221CM5G product description VFB =1.25V， the output voltage is adjustable Pin Configuration Pin Assignment Pin Number Pin Name Functions 1 VIN Power Input Voltage 2 VSS Ground 3 CE ON / OFF Control 4 FB Feedback Voltage 5 VOUT Output Voltage www.microne.com.cn Page 3 of 10 SOT23-5 V04 ME6221 Block Diagram Absolute Maximum Ratings Parameter Symbol Ratings Units Input Voltage VIN 18 V Output Current IOUT 500 mA Output Voltage VOUT Vss-0.3～8.0 V CE Pin Voltage VCE Vss-0.3～VIN +0.3 V FB Pin Voltage VFB Vss-0.3～VIN +0.3 V PD 300 mW Operating Temperature Range TOPR －40～＋150 ℃ Storage Temperature Range TSTG －55～＋150 ℃ Power Dissipation SOT23-5 Lead Temperature V04 260℃，4sec www.microne.com.cn Page 4 of 10 ME6221 Electrical Characteristics (VIN= Vout+1，VCE＝VIN ，VOUT=VFB, CIN=COUT=1uF，Ta=25OC，unless otherwise noted) Parameter Symbol Conditions Min. Typ. Max. Units VOUT(E) (Note 2) IOUT=30mA, X 0.98 VOUT (T) (Note 1) X 1.02 V Output Voltage Range VROUT VIN= VOUT(T)+1V，VCE＝VIN Using test circuit 2 1.25 5.0 V Maximum Output Current IOUTMAX VIN= VOUT+1V（Note1） 400 550 mA Load Regulation ∆VOUT 1mA≤IOUT≤100mA 4 10 mV VDIF1 IOUT =100mA 125 140 mV VDIF2 IOUT =200mA 250 270 mV Supply Current ISS VIN= 3V, VCE＝VIN 45 60 μA Stand-by Current ICEL VIN= 3V,VCE＝0V 0 1 μA Line Regulation (Note 1) ∆VOUT IOUT =30mA Vout+1V ≤VIN≤18V 4 15 mV CE “High” Voltage VCEH RL=1.0KΩ 1.3 18 V CE “Low” Voltage VCEL RL=1.0KΩ 0 0.7 V CE “High”Current ISH VCE=7V -0.1 0.1 μA CE “Low” Current ISL VCE=0V -0.1 0.1 μA Short-circuit Current ISHORT VOUT＝0V 70 mA Thermal Shutdown Protection Tsd IOUT=1mA, 165 ℃ Over Current Protection Ilimit 600 mA Output Voltage Dropout Voltage (Note 3) Note ： 1. VOUT (T) ：Output Voltage less than 1.25V, the input Voltage should be 2.8V at least, and the others fulfil the rule of Vin=Vout+1. 2.VOUT (E) ：Effective Output Voltage ( le. The output voltage when “VOUT (T)+1.0V”is provided at the Vin pin while maintaining a certain IOUT value.) 3.VDIF：VIN1 –VOUT (E)’ VIN1 ：The input voltage when VOUT(E)’ appears as input voltage is gradually decreased. VOUT (E)’=A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VOUT (T)+1.0V} is input. V04 www.microne.com.cn Page 5 of 10 ME6221 Type Characteristics (1) Feedback Voltage VS. Input Voltage (2) Feedback Voltage VS. Temperature Feedback Voltage(V) Feedback Voltage VS.Input Voltage Feedback Voltage(V) 1.4 1.25 1.1 VCE=VIN 0.95 0.8 VFB=VOUT 0.65 IO=10mA 5 10 15 1.28 1.25 1.22 20 VCE=VIN=3V 1.19 1.16 VFB=VOUT 1.13 IO=10mA 1.10 -40 0.5 0 Fe e dba ck Volta ge VS. Te mpe ra ture 0 (3) Feedback Voltage VS. Output Current 120 160 (4) Quiescent Current VS. Input Voltage Feedback Voltage VS. Output Current Quiescent Current VS. Input Voltage Quiescent Current(uA) 1.28 Feedback Voltage(V) 80 Te mpe ra tu ℃) re( Input Voltage(V) 1.25 1.22 1.19 VCE= VIN=3V 1.16 VFB=VOUT 1.13 60 50 40 30 20 VCE=VIN 10 VFB=VOUT 0 1.1 0 100 200 300 400 0 500 5 (5)Output Voltage VS. Output Current （VIN=VOUT+1V, VOUT=3.3V） Output Voltage(V) 3.32 3.29 3.26 V CE=VIN=4.3V Vce=Vin=4.3V Vout=3.3V 3.2 100 200 300 400 500 600 Output Current V04 20 Output Volta ge VS. Te mpe ra ture 3.35 0 15 (6) Output Voltage VS. Temperature （VIN=VOUT+1V , VOUT=3.3V, IOUT=10mA） Output Current VS. Output Voltage 3.23 10 Input Voltage(V) Output Current(mA) Output Voltage 40 3.35 3.30 3.25 3.20 3.15 3.10 3.05 3.00 -40 VCE=V V IN i n=4.3V =4.3V Io= 10mA IO=10mA Vout=3.3V 0 40 80 120 T e m p e r a t℃) ure( www.microne.com.cn Page 6 of 10 160 ME6221 (7)Dropout Voltage VS. Output Current （VIN=VOUT+1V,VOUT=3.3V） （8）Output Voltage VS. Input Voltage （VOUT=3.3V） Output Volta ge VS. Input Volta ge Output Voltage(V) Dropout Voltage VS. Output current Dropout Voltage(mV) 800 600 400 200 VCE=VIN=4.3V 3.5 3 2.5 2 1mA 1.5 30mA 1 0.5 0 0 0 100 200 300 400 500 VCE=VIN 100mA 0 5 10 15 20 Input Volta ge (V) Output current(mA) Applications Information 1. Setting the Output Voltage ME6221 series output voltage can be set via a external resistor. AS the internal reference is 1.25V (Typical), the external voltage can optionally set between 1.25V and 5.0V by connecting a extra resistor between the Vout and VFB pins and a resistor between the VFB and VSS pins. The output voltage is calculated as below: R1   VOUT  1.25  1    R2  Table 1: Resistor selection for output voltage setting (e.g.) VO (V) R1 (KΩ) R2 (KΩ) 1.8 53 120 2.5 120 120 3.0 168 120 3.3 197 120 3.6 225 120 5.0 360 120 Caution: The value of R2 is more than 100K in the best. V04 www.microne.com.cn Page 7 of 10 ME6221 2. Input Bypass Capacitor An input capacitor is recommended. A 1uFor more tantalum on the input is a suitable input bypassing for almost all applications. 3. Output Capacitor The output capacitor is critical in maintaining regulator stability, and must meet the required conditions for both minimum amount of capacitance and ESR (Equivalent Series Resistance).The output capacitance required by the ME6221 is 2.2µF or more, If a tantalum capacitor is used. Any increase of the output capacitance will merely improve the loop stability and transient response. The ESR of the output capacitor should be less than 1Ω . 4. Load Regulation The ME6221 regulates the voltage that appears between its output and adjust pins. In some cases, line resistances can introduce errors to the voltage across the load. To obtain the best load regulation, a few precautions are needed. Figure 1, shows a typical application. The Rt1 and Rt2 are the line resistances. It is obvious that the VLOAD is less than the VOUT by the sum of the voltage drops along the line resistances. In this case, the load regulation seen at the RLOAD would be degraded from the datasheet specification. To improve this , the load should be tied directly to the output terminal on the positive side and directly tied to the ground terminal on the negative side. Rt1 CE VIN VIN VSS Rt1 IL VOUT FB Vload R load VOUT Rt2 Vload=VOUT-IL(Rt1+ Rt2) Fig.1 Typical Application V04 www.microne.com.cn Page 8 of 10 ME6221 Packaging Information ● Packaging Type: SOT23-5 DIM Millimeters Inches Min Max Min Max A 0.9 1.45 0.0354 0.0570 A1 0 0.15 0 0.0059 A2 0.9 1.3 0.0354 0.0511 B 0.2 0.5 0.0078 0.0196 C 0.09 0.26 0.0035 0.0102 D 2.7 3.1 0.1062 0.1220 E 2.6 3.1 0.0866 0.1181 E1 1.50 1.80 0.0511 0.0708 e 0.95REF 0.0374REF e1 1.90REF 0.0748REF L 0.10 0.60 0.0039 0.0236 a0 00 300 00 300 V04 www.microne.com.cn Page 9 of 10 ME6221      The information described herein is subject to change without notice. Nanjing Micro One Electronics Inc is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Nanjing Micro One Electronics Inc is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Nanjing Micro One Electronics Inc. Although Nanjing Micro One Electronics Inc exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. The user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. V04 www.microne.com.cn Page 10 of 10