SE5221 SEAWARD | Alldatasheet

Document overview

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Technical content

Features

¾ Typical 256mV Dropout Voltage at 200mA ¾ Up to 200mA Output Current (Each Channel) ¾ Low Ground Current at 120uA (Typ.) ¾ Dual Shutdown Pins to Control Each Output ¾ Current Limiting and Thermal Protection ¾ Two LDOs in SOT-23-6L Package ¾ 100% Lead (Pb)-Free Pin Configuration Application ¾ Cellular Phones. ¾ Laptop, Notebook, and Palmtop Computers. ¾ Battery-Powered Equipments. ¾ Hand-held Equipments. ¾ Wireless LAN Devices. Application Diagram EN1EN2 GND VIN VOUT1VOUT2 2.2uF 2.2uF 2.2uF Chip enable Chip enable

Ordering Information

SE5221 _ _ L G G: V out2/GND/EN2/EN1/VIN/VOUT1 L : S O T 2 3 - 6 L D: V OUT2 = 1.8V G: V OUT2 = 1.3V A : VOUT1 = 3.3V B : VOUT1 = 2.8V

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 Block Diagram VREF OCP OTP OCP VIN EN1 VOUT2 EN2 VOUT1 GND 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 Marking Information Vout1=3.3V Vout2=1.8V SE5221ADLG-LF 21ADLz Vout1=2.8V Vout2=1.8V SE5221BDLG-LF 21BDLz Vout1=3.3V Vout2=1.3V SE5221AGLG-LF 21AGLz Vout1=2.8V Vout2=1.3V SE5221BGLG-LF 21BGLz The last character is the batch number. A dot on top right corner is for lead-free process. LF: lead free.

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 Absolute Maximum Rating (1) Parameter Symbol Value Units Input Voltage V IN 6 V Enable Voltage V EN -0.3 to V IN V Power Dissipation P D Internally Limited (3) Thermal Resistance Junction-to-Ambient ΘJA 230 (SOT-23-6) °C/W Lead Temperature (Soldering, 5 sec.) 260 °C Junction Temperature T J +150 °C Storage Temperature T S -40 to +150 °C Operating Rating (2) Parameter Symbol Value Units Supply Input Voltage V IN +3.3V to +5.5 V Junction Temperature T J 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 Parameter Conditions Min Typ Max Unit Channel 1 SE5221 – 2.8V SE5221 – 3.3V 2.716 3.201 2.8 3.3 2.884 3.399 VOUT Output Voltage Accuracy Channel 2 SE5221 – 1.3V SE5221 – 1.8V 1.261 1.746 1.3 1.8 1.339 1.854 V Channel 1 VIN = (VOUT+0.4)V to 5.5V -- 0.14 -- ΔVOUT/VOUT Line Regulation Channel 2 VIN =(VOUT+0.4)V to 5.5V -- 0.14 -- %/V Channel 1 IOUT = 1mA to 200mA -- 0.66 -- ΔVOUT/VOUT Load Regulation (5) Channel 2 IOUT = 1mA to 200mA -- 1.32 --

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 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 Conditions Min Typ Max Unit Channel 1 -- -0.025 -- ΔVOUT/ΔT Output Voltage Temperature Coefficient (4) Channel 2 -- -0.63 -- mV/°C IOUT = 100mA -- 128 -- Channel 1 IOUT = 200mA -- 256 -- IOUT = 100mA -- 237 -- VIN – VOUT Dropout Voltage (6) Channel 2 IOUT = 200mA -- 427 -- mV Thermal Protection Temperature -- 180 -- TPROTECTION Thermal Protection Protection Hysterisys -- 30 -- PSRR Ripple Rejection f = 100 Hz, Vin=4.5V,Vp-p=1V,Iout=100mA -- 60 -- dB No Load -- 110 -- IQ Quiescent Current IOUT = 100mA (Both Channel) -- 125 -- μA Voltage Increasing, Output Turns On, Logic High 1.6 -- -- VTH(EN) Enable Input Threshold Voltage Voltage Decreasing, Output Turns Off, Logic Low -- -- 0.4 V Ileak Shutdown Supply Current -- 5 uA Channel 1 200 -- IMAX Current Limit Channel 2 200 -- 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.

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) SE5221 Typical Operating Characteristics IQ Vs temperature 112 114 116 118 120 122 25 50 75 100 125 Temperature( ℃) IQ(uA) Vout VS Temperture 2.850 2.851 2.852 2.853 2.854 2.855 25 50 75 100 125 Temperature(℃) Vout(V) PSRR VS Frequency 0.01 0.1 1 10 100 1000 Frequency(KHz) PSRR(dB) Vout1 Vout2 IQ VS ILOAD 100 110 120 130 140 150 160 0 40 80 120 160 200 ILOAD (mA) IQ (uA) IQ VS VIN 100 110 120 130 140 150 2.5 3 3.5 4 4.5 5 5.5 6 VIN （V） IQ（uA） Iq（no load） Iq（Both load=100mA ）

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) SE5221 Application Hints Like any low dropout regulator, SE5221 requires external capacitors to ensure stability. The external capacitors must be carefully selected to ensure performance. Thermal Considerations It is important that the thermal limit of the package is not exceeded. The SE5221 has built-in thermal protection. When the thermal limit is exceeded, the IC will enter protection, and V OUT 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 (P D) is PD = IOUT * [VIN – VOUT] The thermal limit of the package is then limited to P D(MAX) = [T J – T A]/ΘJA where T J is the junction temperature, TA is the ambient temperature, and Θ JA for SOT-23-6 is around 230°C/W for SE5221. SE5221 is designed to enter thermal protection at 120°C. For example, if T A is 25°C then the maximum PD is limited to about 0.4W. In other words, if I OUT(MAX) = 200mA, then [V IN – V OUT] cannot exceed 2V. Input Capacitor An input capacitor of at least 1 μF is required. Electrolytic or Ceramic or Tantalum can be used. The value can be increased without upper limit. Output Capacitor An output capacitor is re quired for stability. It must be placed no more than 1 cm away from the V OUT pin, and connected directly between V OUT and GND pins. Electrolytic or Ceramic or Tantalum can be used. The minimum value is 1μF but may be increased without limit.

Preliminary and all contents are subject to change without prior notice © Seaward Electronics Inc., 2007. • www.seawardinc.com • Page 7 Dual 200mA CMOS LDO Voltage Regulator (Preliminary) SE5221 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