Dual 200mA CMOS LDO Voltage Regulator (Preliminary) Description SE5221 SE5221 Features is a low dropout ¾ Typical 256mV Dropout Voltage at 200mA regulator supplying up to 200mA at each channel. ¾ Up to 200mA Output Current (Each Channel) The output voltages are selectable between ¾ Low Ground Current at 120uA (Typ.) 2.8V/3.3V ¾ Dual Shutdown Pins to Control Each Output ¾ Current Limiting and Thermal Protection The SE5221 uses internal PMOS transistors ¾ Two LDOs in SOT-23-6L Package as the pass devices to regulate the output voltages. ¾ 100% Lead (Pb)-Free for dual-channel Channel-1 and 1.3V/1.8V for Channel-2 with 3% accuracy. 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 Application ¾ Cellular Phones. ¾ Laptop, Notebook, and Palmtop Computers. ¾ Battery-Powered Equipments. ¾ Hand-held Equipments. ¾ Wireless LAN Devices. devices. Other features include a current limiting, and over temperature protection. Ordering Information SE5221 _ _ L G Pin Configuration 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 B: VOUT1 = 2.8V Application Diagram Chip enable Chip enable 3 EN2 1 VOUT2 VOUT1 4 EN1 2.2uF VIN GND 6 2.2uF 5 2.2uF 2 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) SE5221 Block Diagram VIN P5 OCP OTP OCP EN2 EN1 P3 P6 VREF VOUT2 VOUT1 P1 P4 GND P2 Functional Pin Desciption Pin No. Pin Name Pin Function 1 VOUT2 Channel 2 Output Voltage 2 GND Common Ground 3 EN2 Chip Enable (Active High) 4 EN1 Chip Enable (Active High) 5 VIN Supply Input 6 VOU1 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 Marking Information SE5221ADLG-LF 21ADLz SE5221BDLG-LF 21BDLz SE5221AGLG-LF 21AGLz SE5221BGLG-LF 21BGLz 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) SE5221 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage VIN 6 V Enable Voltage VEN -0.3 to VIN Power Dissipation Thermal Resistance Junction-to-Ambient V (3) PD Internally Limited ΘJA 230 (SOT-23-6) °C/W 260 °C Lead Temperature (Soldering, 5 sec.) Junction Temperature TJ +150 °C Storage Temperature TS -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage VIN +3.3V to +5.5 V Junction Temperature TJ 0 to +125 °C Electrical Characteristics VIN =Vout+1V; VEN1=VEN2=VIN; IOUT = 10mA, CIN = 2.2μF; COUT = 2.2μF; TJ = 25°C; unless otherwise specified Symbol VOUT ΔVOUT/VOUT Parameter Output Voltage Accuracy Line Regulation ΔVOUT/VOUT Load Regulation (5) 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 Min Typ Max 2.716 3.201 2.8 3.3 2.884 3.399 Unit V 1.261 1.746 1.3 1.8 1.339 1.854 -- 0.14 -- Channel 2 VIN =(VOUT+0.4)V to 5.5V -- 0.14 -- Channel 1 IOUT = 1mA to 200mA -- 0.66 -- Channel 2 IOUT = 1mA to 200mA -- %/V % 1.32 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) SE5221 Electrical Characteristics (Continued) VIN =Vout+1V; VEN1=VEN2=VIN; IOUT = 10mA, CIN = 2.2μF; COUT = 2.2μF; TJ = 25°C; unless otherwise specified Symbol Parameter Output Voltage Temperature Coefficient (4) ΔVOUT/ΔT Conditions Min Typ Max Channel 1 -- -0.025 -- Channel 2 -- -0.63 -- ----- 128 256 237 427 ----- Thermal Protection Temperature -- 180 -- Protection Hysterisys -- 30 -- -- 60 -- dB --- 110 125 --- μA 1.6 -- -- Channel 1 VIN – VOUT Dropout Voltage (6) Channel 2 TPROTECTION Thermal Protection PSRR Ripple Rejection IQ Quiescent Current VTH(EN) Enable Input Threshold Voltage Ileak Shutdown Supply Current IMAX Current Limit IOUT = 100mA IOUT = 200mA IOUT = 100mA IOUT = 200mA 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 Channel 1 Channel 2 Unit mV/°C mV °C V -- -- 0.4 -- 5 uA 200 200 --- mA 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. Changes in output voltage due to heating effects are 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. 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) SE5221 Typical Operating Characteristics IQ VS VIN IQ VS ILOAD 150 160 140 150 140 IQ (uA) IQ（uA） 130 120 110 100 110 100 Iq（no load） 90 Iq（Both load=100mA ） 0 80 2.5 3 3.5 4 4.5 5 5.5 130 120 40 80 6 120 160 200 ILOAD (mA) VIN （V） IQ Vs temperature 122 2.854 Vout(V) 120 IQ(uA) Vout VS Temperture 2.855 118 116 2.853 2.852 2.851 114 2.850 112 25 50 75 100 125 Temperature(℃) 25 50 75 Temperature(℃) PSRR(dB) PSRR VS Frequency 80 70 60 50 40 30 20 10 0 0.01 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 5 100 125 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) SE5221 Application Hints Thermal Considerations Like any low dropout regulator, SE5221 requires It is important that the thermal limit of the package external capacitors to ensure stability. is not exceeded. The SE5221 has built-in external capacitors must be carefully selected to thermal protection. When the thermal limit is ensure performance. exceeded, the IC will enter protection, and VOUT The will be gradually pulled to ground as load 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. a given application can be calculated as following: The power dissipation (PD) is PD = IOUT * [VIN – VOUT] Output Capacitor An output capacitor is required for stability. continued to increase. The power dissipation for It must be placed no more than 1 cm away from the The thermal limit of the package is then limited to VOUT pin, and connected directly between VOUT PD(MAX) = [TJ – TA]/ΘJA where TJ is the junction and GND pins. Electrolytic or Ceramic or temperature, TA is the ambient temperature, and Tantalum can be used. The minimum value is ΘJA for SOT-23-6 is around 230°C/W for SE5221. 1μF but may be increased without limit. 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. 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 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 SE5221