View SE5221ADLG-LF_4611095.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 120A 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 (c) 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 (c) 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 JA 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 = 2.2F; COUT = 2.2F; TJ = 25C; unless otherwise specified
Symbol
Parameter
VOUT
Output Voltage Accuracy
VOUT/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 --% --
VOUT/VOUT
Load Regulation (5)
Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice (c) 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 = 2.2F; COUT = 2.2F; TJ = 25C; unless otherwise specified
SE5221
Symbol VOUT/T
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 A
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)/JA. 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 (c) 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
IQuA
120 110 100 90 80
Iqno load IqBoth 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 (c) 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]/JA where TJ is the junction temperature, TA is the ambient temperature, and JA for SOT-23-6 is around 230C/W for SE5221. SE5221 is designed to enter thermal protection at 120C. For example, if TA is 25C 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 1F 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 1F but may be increased without limit.
Revision 9/4/2008 Preliminary and all contents are subject to change without prior notice (c) 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 (c) Seaward Electronics Inc., 2007. * www.seawardinc.com * Page 7

▲Up To Search▲

Price & Availability of SE5221ADLG-LF

	To Download SE5221ADLG-LF Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .