Leshan Radio Co ., Ltd LR8558 Low noise, fast response 500mA LDO regulator General Description： Features： • • • • • • • • • Low Power Consumption: 75uA（Typ.） Low output noise (47uVRMS) Standby Mode: 0.1uA Low dropout Voltage: 0.46V@500mA (Typ.) High Ripple Rejection: 66dB@100Hz (Typ.) Low Temperature Coefficient: ±100ppm/°C Excellent Line regulation: 0.05%/V Build-in chip enable and discharge circuit Output Voltage Range: 1.2V~4.5V (customized on command every 0.1V step) • • Highly Accurate: ±2% (±1% customized) Output Current Limit Applications： • Power source for cellular phones and various kind of PCSs • • Battery Powered equipment Power Management of MP3, PDA, DSC, Mouse, PS2 Games • • LR8558 series is a group of positive voltage output, low power consumption, low dropout voltage regulator. LR8558 can provide output value in the range of 1.2V~4.5V every 0.1V step. It also can be customized on command. LR8558 includes high accuracy voltage reference, error amplifier, current limit circuit and output driver module with discharge capability. LR8558 has excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage accuracy within±2%. LR8558 is available in SOT-23-5, SC-82 packages which is lead free. It also can available in these packages with lead. Reference Voltage Source Regulation after Switching Power L8558 Ty pical Performance Characteristics： LR8558 Typical Application Circuit L58558 Vout(V) L58558-2.8V Output 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2 0 200 400 600 Iload(mA) 1/11 Leshan Radio Co ., Ltd Selection Guide： LR8558-XX X X Package Type： SA：SOT-89-3 SB：SOT-89-3 RM：SOT-23-3 RN：SOT-23-5 T： TO-92 Features： P：Standard（defualt、lead free） C：Customized Output Voltage： 12……1.2V 15……1.5V 28……2.8V 30……3.0V 35……3.5V …… 45……4.5V Pin Assignment： LR8558-XXPSA LR8558-XXPSB LR8558-XXPRM LR8558-XXPRN LR8558-XXPT 2/11 Leshan Radio Co ., Ltd Pin Description： Pin Number SOT-89-3 (A) SOT-89-3 (B) 1 3 2 3 2 1 SOT-23-5 SOT-23-3 TO-92 5 1 2 3 4 2 3 1 3 1 2 Symbol Function Vout Vin Vss CE NC Output pin Input Pin Ground Pin Chip Enable Pin No Connection Product Classification： Output Voltage Package Type Product Name Package Type Product Name Package Type Product Name 1.2V 1.5V 1.8V 2.1V 2.5V 2.8V 3.0V 3.2V 3.3V 3.5V SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A SOT-89-3A LR8558-12PSA LR8558-15PSA LR8558-18PSA LR8558-21PSA LR8558-25PSA LR8558-28PSA LR8558-30PSA LR8558-32PSA LR8558-33PSA LR8558-35PSA SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B SOT-89-3B LR8558-12PSB LR8558-15PSB LR8558-18PSB LR8558-21PSB LR8558-25PSB LR8558-28PSB LR8558-30PSB LR8558-32PSB LR8558-33PSB LR8558-35PSB SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 SOT-23-5 LR8558-12PRN LR8558-15PRN LR8558-18PRN LR8558-21PRN LR8558-25PRN LR8558-28PRN LR8558-30PRN LR8558-32PRN LR8558-33PRN LR8558-35PRN 4.5V SOT-89-3A LR8558-45PSA SOT-89-3B LR8558-45PSB SOT-23-5 LR8558-45PRN Output Voltage Package Type Product Name Package Type Product Name 1.2V 1.5V 1.8V 2.1V 2.5V 2.8V 3.0V 3.2V 3.3V 3.5V SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 SOT-23-3 LR8558-12PRM LR8558-15PRM LR8558-18PRM LR8558-21PRM LR8558-25PRM LR8558-28PRM LR8558-30PRM LR8558-32PRM LR8558-33PRM LR8558-35PRM TO-92 TO-92 TO-92 TO-92 TO-92 TO-92 TO-92 TO-92 TO-92 TO-92 LR8558-12PT LR8558-15PT LR8558-18PT LR8558-21PT LR8558-25PT LR8558-28PT LR8558-30PT LR8558-32PT LR8558-33PT LR8558-35PT 4.5V SOT-23-3 L58558-45PRM TO-92 LR8558-45PT 3/11 Leshan Radio Co ., Ltd Product Marking information: SOT23-5 SOT-23-3 LR8558 SOT-89-3(A) SOT-89-3(B) TO-92 1： Output voltage 2.：Lot NO. 4/11 Leshan Radio Co ., Ltd Block Diagram： Absolute Maximum Ratings： Max input voltage------------------------------------------------------------------------------------10V Junction Temperature (TJ) ------------------------------------------------------------------------125°C Output Current --------------------------------------------------------------------------------------- 500mA Power Dissipation SOT-23-5 -------------------------------------------------------------------------------------------250mW SOT-23-3 -------------------------------------------------------------------------------------------200mW SOT-89-3 -------------------------------------------------------------------------------------------500mW TO-92 ------------------------------------------------------------------------------------------------350mW Storage Temperature (Ts)--------------------------------------------------------------------------45°C～150°C Recommended Work Conditions： Item Input Voltage Range Ambient Temperature Min Recommended -40 Max 8 85 unit V °C Electrical Characteristics： （Test Conditions: Cin=1uF,Cout=3.4uF,TA=25°C, unless otherwise specified. ） LR8558, for arbitrary output voltage Symbol Parameter Vin Input Voltage Conditions Min Vout Output Voltage Vin=Set Vout+1V 1mA≤Iout≤30mA Vout x0.98 Iout (Max.) Maximun Output Current Vin-Vout=1V 500 Typ Vout1 Max Units 8 Vout X1.02 V V mA ge 5/11 Leshan Radio Co ., Ltd Dropout Voltage,Vout≥2.8V Iout=100mA Iout=300mA Iout=500mA 88 270 460 120 350 600 mV mV mV ∆Vout ∆Vin ⋅ Vout Line Regulation Iout=40mA 2.8V≤Vin≤8V 0.05 0.2 %/V ∆Vout / ∆Iout Load Regulation 20 40 mV Iss 75 90 uA 0.1 1.0 uA ∆Vout ∆T ⋅ Vout Supply Current Supply Current (Srandby) Output Voltage Temperature Coefficiency PSRR Ripple Rejection Ilim Short Current Limit CE Pull down Resistance CE Input Voltage “H” CE Input Voltage “L” Output Noise Vdrop 1 Istandby Rpd Vceh Vcel en 1. Vin=Set Vout+1V 1mA≤Iout≤500mA Vin=Set Vout+1V Vin=Set Vout+1V Vce=GND Iout=30mA F=100Hz, Ripple=0.5Vp-p Vin=Set Vout+1V Vout=0V 2.0 ±100 ppm/°C 65 dB 200 mA 5.0 1.5 0 BW=10Hz~100kHz 47 10.0 MΩ Vin 0.25 V V uVrms Vdrop=Vin1-(Vout2*0.98) Vout2 is the output voltage when Vin=Vout1+1.0V and Iout=300mA or Iout=500mA. Vin1 is the input voltage at which the output voltage becomes 98% of Vout1 after gradually decreasing the input voltage. Typical Application Circuit： Application hints： NOTE1: Input capacitor (Cin=1uF) is recommended in all application circuit. LR8558 NOTE2: Output capacitor (Cout=3.3uF/4.7uF) is recommended in all application to assure the stability of circuit. Explanation： LR8558 series is a group of positive voltage output, low noise, low power consumption, low dropout voltage regulator. LR8558 can provide output value in the range of 1.2V~4.5V every 0.1V step. It also can be customized on command. LR8558 includes high accuracy voltage reference, error amplifier, current limit circuit and output driver module. LR8558 has excellent load and line transient response and good temperature characteristics, which can assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage accuracy within±2%. 6/11 Leshan Radio Co ., Ltd Typical Performance Characteristics： 1) Output Voltage vs. Output Current (with output short protection) 2) Output Voltage vs. Input Voltage 3 2 1.8 2.5 1.6 1.4 Vout(V) Vout(V) 2 1.5 Vin=3.3V 1 0.5 1.2 Iload=0 Iload=28mA 1 0.8 Vin=3.8V 0.6 Vin=4.8V 0.4 0.2 0 0 200 400 600 800 1000 0 1200 0 2 Iload(mA) 6 8 10 Vin(V) 3) Dropout Voltage vs. Output Current 4) Ripple rejection vs. Frequency 0.7 90 80 0.6 Vout=2.8V 70 Vout=1.8V 60 PSRR(dB) 0.5 Dropout(V) 4 0.4 0.3 50 40 30 0.2 20 0.1 10 0 0 100 200 300 Iload(mA) 400 500 600 0 0.01 0.1 1 10 100 Freq(kHz) 7/11 Leshan Radio Co ., Ltd 5) Line transient response Iout=1mA Cout=1uF Iout=50mA Cout=1uF 5V 4V 5V Input Voltage Input Voltage 4V Output Voltage Output Voltage 6) Load transient response Vin=4.6V Cout=1uF Vin=4.6V Cout=4.7uF Output Voltage Output Voltage 50mA 1mA Output Current 50mA Output Current 1mA Vin=5.8V Cout=1uF Vin=5.8V Cout=1uF 60mA 250mA Output Current Output Current 1mA 1mA Output Voltage Output Voltage 8/11 Leshan Radio Co ., Ltd 7) Startup response 8) Shutdown response EN voltage EN voltage Output voltage Output voltage 9/11 Leshan Radio Co ., Ltd Package Information: SOT-23-5: Package specification： SOT-89-3: Package Dimension: Unit: mm Unit: mm 10/11 Leshan Radio Co ., Ltd SOT-23-3: Package dimension： Unit: mm 11/11