LESHAN RADIO COMPANY, LTD. LR8555 Low noise 150mA LDO regulator LR8555 series is a group of positive voltage output Low power consumption,low dropout voltage regulator. LR8555 can provide output value in the range of 1.2~5V every 0.1V step.It also can be customized on command. LR8555 includes high accuracy voltage reference,error amplifier,current limit circuit and output driver module. LR8555 has excellent load and line transient response and good temperature characteristcs,which can assure the stabllity of chip and power system.And it uses trimming technique to output voltage accuracy with ± 2%. LR8555 is avilable in SOT23-5,SC70-5 packages which is lead free.It also can available in these packages with lead. Featurel Applicationl Cellular Voltage Voltage LR8555 Typical Performance Characterilticl LR8555 Typical Application Circuit LR8555-1.8V Output CE V DD IN LR8555 + V OUT OUT + GND Cap Cap 1/9 LESHAN RADIO COMPANY, LTD. Selection Guide Pin Allignment LR8555 XX X X LR8555 SC70-5 5 4 ķĸĹĺ 1 LR8555 LR8555 2 3 SOT23-5 5 4 ķĸĹĺ 1 2 3 Pin Delcription SC-70-5 Pin Number SOT-23-5A Symbol Function SOT-23-5B Product Clallification Output Voltage Pagkage Type Produgt Name Pagkage Type Produgt Name Pagkage Type Produgt Name 1.2V 1.5V 1.8V 2.1V 2.5V 2.8V 3.0V 3.2V 3.3V 3.5V SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A SOT-23-5A LR8555-12PRA LR8555-15PRA LR8555-18PRA LR8555-21PRA LR8555-25PRA LR8555-28PRA LR8555-30PRA LR8555-32PRA LR8555-33PRA LR8555-35PRA SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B SOT-23-5B LR8555-12PRB LR8555-15PRB LR8555-18PRB LR8555-21PRB LR8555-25PRB LR8555-28PRB LR8555-30PRB LR8555-32PRB LR8555-33PRB LR8555-35PRB SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 SC-70-5 LR8555-12PQ LR8555-15PQ LR8555-18PQ LR8555-21PQ LR8555-25PQ LR8555-28PQ LR8555-30PQ LR8555-32PQ LR8555-33PQ LR8555-35PQ 5.0V SOT-23-5A LR8555-50PRA SOT-23-5B LR8555-50PRB SC-70-5 LR8555-50PQ 2/9 LESHAN RADIO COMPANY, LTD. Product Marking information: SC70-5 5 SOT23-5A 5 4 ķĸĹĺ 1 ķ 2 3 SOT23-5B 4 5 4 ķĸĹĺ ķĸĹĺ 1 1 2 3 2 ķ Output current & EN availability ĸ Output voltage Ĺ Year of manufacturing ĺ Week of mannufacturing 3 ĸ D 200mA No D 200mA Yes E 250mA No E 250mA Yes F 300mA No F 300mA Yes G 350mA No G 350mA Yes Code 2 3 4 5 6 7 8 9 H 400mA No H 400mA Yes 0 I 450mA No I 450mA Yes 1 J 500mA No J 500mA Yes 2 Code Iout EN Code Iout EN A 50mA No A 50mA Yes B 100mA No B 100mA Yes C 150mA No C 150mA Yes 3 For example: LR8555 with output current 150mA,SOT23-5 package with an EN pin its position ķ is c 4 5 6 Vout 1.2V 1.3V 1.4V 1.5V 1.6V 1.7V 1.8V 1.9V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V Code 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 Iout 2.7V 2.8V 2.9V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 3.6V 3.7V 3.8V 3.9V 4.0V 4.1V Code 2 3 4 5 6 7 8 9 0 Iout 4.2V 4.3V 4.4V 4.5V 4.6V 4.7V 4.8V 4.9V 5.0V Ĺ The year of manufacturing: "5" stands for year 2005, "6" stands for year 2006,and " 0 " for year 2010. ĺ Code Week of Mfg Code Week of Mfg Code Week of Mfg Code Week of Mfg Code Week of Mfg A B C D E F G H I J K 1 2 3 4 5 6 7 8 9 10 11 L M N O P Q R S T U V 12 13 14 15 16 17 18 19 20 21 22 W X Y Z A B C D E F G 23 24 25 26 27 28 29 30 31 32 33 H I J K L M N O P Q R 34 35 36 37 38 39 40 41 42 43 44 S T U V W X Y Z 45 46 47 48 49 50 51 52 Block Diagram V OUT V DD + Vref Current Limit CE GND 3/9 LESHAN RADIO COMPANY, LTD. Ablolute Maximum Ratingl Recommended Work Conditionl Item Min Recommended Max unit Electrical Characterilticl LR8555, for arbitrary output voltage Symbol Parameter Conditionl Min Typ Max Unitl VOUT VIN*VOUT VOUT IOUT VOUT T*VOUT LLim Short Current Limit 4/9 LESHAN RADIO COMPANY, LTD. Electrical Characterilticl by Output Voltage Output Voltage Vout (V) Dropout Voltage, VDIF (V) Condition Typ. Max. Typical Application Circuit Application hintl CE V DD IN LR8555 + VOUT OUT + GND Cap Cap 5/9 LESHAN RADIO COMPANY, LTD. Typical Performance Characterilticl 1) Output Voltage vl. Output Current (with output lhort protection) LR8555-1.8V 3) Dropout Voltage vl. Output Current 2) Output Voltage vl. Input Voltage LR8555-1.8V 4) Supply Cur rent vl. Input Voltage LR8555-1.8 6/9 LESHAN RADIO COMPANY, LTD. 5) Ripple rejection vl. Frequency 6) Line tranlient relponle Vin Vout 7) Load tranlient relponle Vout Iout = 100mA Iout = 50mA 7/9 LESHAN RADIO COMPANY, LTD. SOT23-5 8/9 LESHAN RADIO COMPANY, LTD. SC70-5 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETERS. DIM MILLIMETERS MIN MAX INCHES MIN MAX A 1.80 2.20 0.071 0.087 B C 1.15 0.80 1.35 1.10 0.045 0.031 0.053 0.043 D G H J 0.10 0.30 0.65 BSC — 0.10 0.10 0.25 0.004 0.026 — 0.004 K N S 0.10 0.30 0.20 REF 2.00 2.20 0.004 0.012 0.008 REF 0.079 0.087 0.012 BSC 0.004 0.010 9/9