SE5221

Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Description SE5221 is a dual-channel low dropout regulator supplying up to 200mA at each channel. The output voltages are selectable between 2.8V/3.3V for Channel-1 and 1.3V/1.8V for Channel-2 with 3% accuracy. The SE5221 uses internal PMOS transistors as the pass devices to regulate the output voltages. The IC consumes 120μA supply current when both channels are turned on, and is nearly independent of load currents and dropout conditions. The EN1 and EN2 pins allows for individual channel controls. When both outputs are shut down simultaneously, the chip will be turned off and consumes nearly zero operating current which is suitable for battery-power devices. Other features include a current limiting, and over temperature protection. SE5221 Features Typical 256mV Dropout Voltage at 200mA Up to 200mA Output Current (Each Channel) Low Ground Current at 120uA (Typ.) Dual Shutdown Pins to Control Each Output Current Limiting and Thermal Protection Two LDOs in SOT-23-6L Package 100% Lead (Pb)-Free Application Cellular Phones. Laptop, Notebook, and Palmtop Computers. Battery-Powered Equipments. Hand-held Equipments. Wireless LAN Devices. Ordering Information SE5221 _ _ L G Pin (1=>6): G: Vout2/GND/EN2/EN1/VIN/VOUT1 L: SOT23-6L D: VOUT2 = 1.8V G: VOUT2 = 1.3V A: VOUT1 = 3.3V Pin Configuration Application Diagram B: VOUT1 = 2.8V Chip enable 3 Chip enable EN2 EN1 6 1 VOUT2 VOUT1 4 VIN GND 2 5 2.2uF 2.2uF 2.2uF Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 1 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Block Diagram VIN P5 OCP OTP OCP SE5221 EN2 P3 VREF EN1 P6 VOUT2 P1 VOUT1 P4 GND P2 Functional Pin Desciption Pin No. 1 2 3 4 5 6 Pin Name VOUT2 GND EN2 EN1 VIN VOU1 Pin Function Channel 2 Output Voltage Common Ground Chip Enable (Active High) Chip Enable (Active High) Supply Input Channel 1 Output Voltage Ordering/Marking Information Package Ordering Information Vout1=3.3V Vout2=1.8V Vout1=2.8V Vout2=1.8V Vout1=3.3V Vout2=1.3V Vout1=2.8V Vout2=1.3V SE5221ADLG-LF SE5221BDLG-LF SE5221AGLG-LF SE5221BGLG-LF 21ADLz 21BDLz 21AGLz 21BGLz Marking Information The last character is the batch number. A dot on top right corner is for lead-free process. LF: lead free. Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 2 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Absolute Maximum Rating (1) Parameter Input Voltage Enable Voltage Power Dissipation Thermal Resistance Junction-to-Ambient Lead Temperature (Soldering, 5 sec.) Junction Temperature Storage Temperature TJ TS Symbol VIN VEN PD ΘJA Value 6 -0.3 to VIN Internally Limited 230 (SOT-23-6) 260 +150 -40 to +150 (3) SE5221 Units V V °C/W °C °C °C Operating Rating (2) Parameter Supply Input Voltage Junction Temperature Symbol VIN TJ Value +3.3V to +5.5 0 to +125 Units V °C Electrical Characteristics VIN =Vout+1V; VEN1=VEN2=VIN; IOUT = 10mA, CIN = 2.2μF; COUT = 2.2μF; TJ = 25°C; unless otherwise specified Symbol Parameter VOUT Output Voltage Accuracy ΔVOUT/VOUT Line Regulation Conditions Channel 1 SE5221 – 2.8V SE5221 – 3.3V Channel 2 SE5221 – 1.3V SE5221 – 1.8V Channel 1 VIN = (VOUT+0.4)V to 5.5V Channel 2 VIN =(VOUT+0.4)V to 5.5V Channel 1 IOUT = 1mA to 200mA Channel 2 IOUT = 1mA to 200mA Min 2.716 3.201 1.261 1.746 ----- Typ 2.8 3.3 1.3 1.8 0.14 0.14 0.66 1.32 Max 2.884 3.399 Unit V 1.339 1.854 -%/V --% -- ΔVOUT/VOUT Load Regulation (5) Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 3 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Electrical Characteristics (Continued) VIN =Vout+1V; VEN1=VEN2=VIN; IOUT = 10mA, CIN = 2.2μF; COUT = 2.2μF; TJ = 25°C; unless otherwise specified SE5221 Symbol ΔVOUT/ΔT Parameter Output Voltage Temperature Coefficient (4) Conditions Channel 1 Channel 2 Channel 1 IOUT = 100mA IOUT = 200mA IOUT = 100mA IOUT = 200mA Min -----------1.6 --- Typ -0.025 -0.63 128 256 237 427 180 30 60 110 125 --- Max ------------- Unit mV/°C VIN – VOUT Dropout Voltage (6) Channel 2 mV TPROTECTION PSRR IQ Thermal Protection Ripple Rejection Quiescent Current Enable Input Threshold Voltage Shutdown Supply Current Current Limit Thermal Protection Temperature Protection Hysterisys f = 100 Hz, Vin=4.5V,Vp-p=1V,Iout=100mA No Load IOUT = 100mA (Both Channel) Voltage Increasing, Output Turns On, Logic High Voltage Decreasing, Output Turns Off, Logic Low °C dB μA VTH(EN) V 0.4 5 --uA mA Ileak IMAX Channel 1 Channel 2 200 200 Note 1: Exceeding the absolute maximum rating may damage the device. Note 2: The device is not guaranteed to function outside its operating range. Note 3: The maximum allowable power dissipation at any TA (ambient temperature) is calculated using: PD(MAX) = (TJ(MAX) – TA)/ΘJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details. Note 4: Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 10mA to 200mA. covered by the thermal regulation specification. Note 6: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Changes in output voltage due to heating effects are Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 4 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Typical Operating Characteristics IQ VS VIN 150 140 SE5221 IQ VS ILOAD 160 IQ (uA) 150 140 130 120 110 100 0 40 80 120 160 200 ILOAD (mA) 130 IQ（uA） 120 110 100 90 80 Iq（no load） Iq（Both load=100mA ） 2.5 3 3.5 4 4.5 5 5.5 6 VIN （V） 122 120 IQ Vs temperature 2.855 2.854 Vout(V) 2.853 2.852 2.851 2.850 Vout VS Temperture IQ(uA) 118 116 114 112 25 50 75 Temperature(℃) 100 125 25 50 75 Temperature(℃) 100 125 PSRR VS Frequency 80 70 60 50 40 30 20 10 0 0.01 PSRR(dB) Vout1 Vout2 0.1 1 10 Frequency(KHz) 100 1000 Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 5 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Application Hints Like any low dropout regulator, SE5221 requires external capacitors to ensure stability. ensure performance. The external capacitors must be carefully selected to SE5221 Thermal Considerations It is important that the thermal limit of the package is not exceeded. thermal protection. The SE5221 has built-in When the thermal limit is exceeded, the IC will enter protection, and VOUT will be gradually pulled to ground as load continued to increase. The power dissipation for a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] It The thermal limit of the package is then limited to PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction temperature, TA is the ambient temperature, and ΘJA for SOT-23-6 is around 230°C/W for SE5221. SE5221 is designed to enter thermal protection at 120°C. For example, if TA is 25°C then the maximum PD is limited to about 0.4W. In other words, if IOUT(MAX) = 200mA, then [VIN – VOUT] cannot exceed 2V. Input Capacitor An input capacitor of at least 1μF is required. Electrolytic or Ceramic or Tantalum can be used. The value can be increased without upper limit. Output Capacitor An output capacitor is required for stability. must be placed no more than 1 cm away from the VOUT pin, and connected directly between VOUT and GND pins. Electrolytic or Ceramic or Tantalum can be used. The minimum value is 1μF but may be increased without limit. Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 6 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) OUTLINE DRAWING SOT-23-6L SE5221 Customer Support Seaward Electronics Incorporated – China Section B, 2nd Floor, ShangDi Scientific Office Complex, #22 XinXi Road Haidian District, Beijing 100085, China Tel: 86-10-8289-5700/01/05 Fax: 86-10-8289-5706 Seaward Electronics Corporation – Taiwan 2F, #181, Sec. 3, Minquan East Rd, Taipei, Taiwan R.O.C Tel: 886-2-2712-0307 Fax: 886-2-2712-0191 Seaward Electronics Incorporated – North America 1512 Centre Pointe Dr. Milpitas, CA95035, USA Tel: 1-408-821-6600 Last Updated - 9/4/2008 Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 7