Preliminary Datasheet LP2203 200mA,Dual Channel Ultra-Fast CMOS LDO Regulator Features General Description Wide Operating Voltage Ranges : 2.5V to 5.5V The LP2203 is a dual channel, low noise, and low dropout regulator sourcing up to 250mA at each channel. The range of output voltage is from 1.2V to 3.6V by operating from 2.5V to 5.5V input. LP2203 offers 2% accuracy, extremely low dropout voltage (80mV @ 150mA), and extremely low ground current, only 25µA per LDO. The shutdown current is near zero current which is suitable for battery-power devices. Other features include current limiting, over temperature, output short circuit protection. LP2203 can operate stably with very small ceramic output capacitors, reducing required board space and component cost. LP2203 is available in fixed output voltages in the USP-6 package. □□ □□ □ F: Pb-Free Package Type U6: USP-6 Out1/Out2 Voltage Type 18/28: 1.8V/2.8V 18/33: 1.8V/3.3V 18/26: 1.8V/2.6V 25/28: 2.5V/2.8V 28/28: 2.8V/2.8V 28/12: 2.8V/1.2V 28/33: 2.8V/3.3V 30/30: 3.0V/3.0V 30/33: 3.0V/3.3V 33/33: 3.3V/3.3V Typical Application Circuit LP2203 2 1 3 EN2 EN1 VOUT1 No Noise Bypass Capacitor Required Fast Response in Line/Load Transient TTL-Logic-Controlled Shutdown Input Dual LDO Outputs (200mA/200mA) High Output Accuracy 2% Ultra-low Quiescent Current 27uA Thermal Shutdown Protection Tiny USP-6 Package RoHS Compliant and 100% Lead (Pb)-Free Pin Configurations USP-6(Top View) Marking Information Vout2 Please see website. 6 5 CDMA/GSM Cellular Handsets Smart mobile phone Battery-Powered Equipment DSC Sensor Wireless Card Vout1 4 ON/OFF VOUT2 Vin GND VIN High PSRR 65dB at 1kHz Applications Ordering Information LP2203 - Low-Noise for RF Application LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 1 of 8 Preliminary Datasheet LP2203 Functional Pin Description Pin No. Pin Name Pin Function 1 EN2 Chip Enable2 (Active High) 2 VIN Supply Input 3 EN1 Chip Enable1 (Active High) 4 GND Common Ground 5 VOUT1 Channel 1 Output Voltage 6 VOUT2 Channel2 Output Voltage Function Block Diagram LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 2 of 8 Preliminary Absolute Maximum Ratings Datasheet LP2203 Supply Input Voltage------------------------------------------------------------------------------------------------------6V Power Dissipation, PD @ TA = 25°C USP-6----------------------------------------------------------------------------------------------------455mW Package Thermal Resistance USP-6, θJA ----------------------------------------------------------------------------------------------------------220°C/W Lead Temperature (Soldering, 10 sec.) -----------------------------------------------------------------------------260°C Storage Temperature Range ----------------------------------------------------------------------------- −65°C to 150°C ESD Susceptibility HBM (Human Body Mode) -------------------------------------------------------------------------------------------2kV MM(Machine-Mode)-----------------------------------------------------------------------------------------------------200V Recommended Operating Conditions Operation Junction Temperature Range -----------------------------------------------------------−40°C to 125°C Operation Ambient TemperatureRange---------------------------------------------------------------−40°C to 85°C Electrical Characteristics (VIN = VOUT + 1V, CIN = COUT = 1µF, TA = 25° C, unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Output Voltage Accuracy ΔVOUT IOUT = 1mA −2 -- +2 % Maximum output Current Imax Continuous 200 250 Current Limit ILIM RLOAD = 1Ω 360 400 700 mA Quiescent Current IQ VEN ≥ 1.2V, IOUT = 0mA 75 110 μA 30 45 IOUT = 30mA, VOUT > Dropout Voltage VDROP 2.8V mV IOUT = 150mA, VOUT > 80 2.8V VIN = (VOUT + 1V) to Line Regulation ΔVLINE Load Regulation ΔLOAD 1mA < IOUT < 300mA Standby Current ISTBY VEN = GND, Shutdown EN Input Bias Current IIBSD VEN = GND or VIN Logic-Low EN Threshold VIL Voltage Logic-High Voltage VIH Power Supply Rejection Rate 200mA COUT = 1µF f = 100Hz PSRR f = 10kHz LP2203 – 01 Ver. 1.1 Datasheet COUT = 1µF, TSD Feb.-2008 % 0.01 1 μA 0 100 nA 0.4 V 1.2 100 uVRMS −75 IOUT = 10mA Thermal Shutdown Temperature 0.6 Shutdown 10Hz to 100kHz, IOUT = Output Noise Voltage % VIN = 3V to 5.5V, Start-Up 150 0.3 5.5V, IOUT = 1mA VIN = 3V to 5.5V, mA −65 165 dB °C Page 3 of 8 Preliminary Datasheet LP2203 Typical Operating Characteristics LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 4 of 8 Preliminary LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Datasheet LP2203 Page 5 of 8 Preliminary Datasheet LP2203 Start-up Function Enable Function Applications Information Like any low-dropout regulator, the external capacitors used with the LP2203 must be carefully selected for regulator stability and performance. Using a capacitor whose value is > 1µF on the LP2203 input and the amount of capacitance can be increased without limit. The input capacitor must be located a distance of not more than 0.5 inch from the input pin of the IC and returned to a clean analog ground. Any good quality ceramic or tantalum can be used for this capacitor. The The LP2203 features an LDO regulator enable/disable capacitor with larger value and lower ESR (equivalent function. To assure the LDO regulator will switch on, the series and EN turn on control level must be greater than 1.2 volts. line-transient response. The output capacitor must meet The LDO regulator will go into the shutdown mode when both requirements for minimum amount of capacitance the voltage on the EN pin falls below 0.4 volts. For to and ESR in all LDOs application. The LP2203 is designed protecting specifically to work with low ESR ceramic output quick-discharge function. If the enable function is not capacitor in space-saving and performance consideration. needed in a specific application, it may be tied to VIN to Using a ceramic capacitor whose value is at least 1µF keep the LDO regulator in a continuously on state. with ESR is > 25mΩ on the LP2203 output ensures Thermal Considerations stability. The LP2203 still works well with output capacitor Thermal protection limits power dissipation in LP2203. of other types due to the wide stable ESR range. Figure 1 When the operation junction temperature exceeds 165°C, shows the curves of allowable ESR range as a function of the OTP circuit starts the thermal shutdown function turn load current for various output capacitor values. Output the pass element off. The pass element turn on again capacitor of larger capacitance can reduce noise and after the junction temperature cools by 30°C. For continue improve load transient response, stability, and PSRR. operation, do not exceed absolute maximum operation The output capacitor should be located not more than 0.5 junction temperature 125°C. inch from the VOUT pin of the LP2203 and returned to a The power dissipation definition in device is : resistance) provides better PSRR the system, the LP2203 have a PD = (VIN−VOUT) x IOUT + VIN x IQ clean analog ground. The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. The maximum power dissipation can be calculated by following formula : PD(MAX) = ( TJ(MAX) − TA ) /θJA Where TJ(MAX) is the maximum operation junction LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 6 of 8 Preliminary Datasheet LP2203 temperature 125°C, TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. For recommended operating conditions specification of LP2203, where TJ(MAX) is the maximum junction temperature of the die (125°C) and TA is the maximum ambient temperature. The junction to ambient thermal resistance (θJA is layout dependent) for USP-6 package is 250°C/W. PD(MAX) = (125°C−25°C) / 250 = 400mW (USP-6) PD(MAX) = (125°C−25°C) / 165 = 606mW The maximum power dissipation depends on operating ambient temperature for fixed TJ(MAX) and thermal resistance θJA. LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 7 of 8 Preliminary Datasheet LP2203 Packaging Information LP2203 – 01 Ver. 1.1 Datasheet Feb.-2008 Page 8 of 8