3mA, Low Power, Low Dropout, 3 -Terminal, Linear Regulators GENERAL DESCRIPTION FEATURES The low-power, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 3mA. They are perfect choice for low voltage, low power applications. An ultra low ground current (µa at 3mA output) makes them attractive for battery operated power systems. The series also offer ultra low dropout voltage (3mV at 3mA output) to prolong battery life in portable electronics The output voltage is preset to voltages in the range of 1.8V to 3.3V. Other features include foldback current limit and thermal shut-down protection. - Ultra-Low Dropout Voltage: 3mV at 3mA output - Low 77µA No-Load Supply Current - Low µa Operating Supply Current at 3mA Output - High PSRR - Thermal-Overload Protection - Output Current Limit - Output Voltage: Available in Fixed Outputs 1.8V, 2.5V, 2.7V, 2.8V, 2.9V, 3.V and 3.3V come in 3-pin SOT23 and 3-pin SOT89 package. APPLICATIONS P CONFIGURATIONS(TOP VIEW) Cellular Telephones Digital Cameras MP3 MP4 USB 2. Modems PC Cameras Hand-Held Instruments Electronic Dictionarys Portable/Battery-Powered Equipment OUT 1 2 SOT23-3 3 TYPICAL OPERATION CIRCUIT 1 2 3 1 2 3 PUT OUT OUTPUT OUT SOT89-3 OUT C 1μF C OUT 1μF SG Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com REV. C
ORDERG FORMATION MODEL VOUT (V) -1.8 1.8V -2.5 2.5V -2.7 2. 7V -2.8 2.8V -2.9 2.9V -3. 3.V -3.3 3.3V P- PACKAGE SPECIFIED TEMPERATURE RANGE ORDERG NUMBER PACKAGE MARKG PACKAGE OPTION SOT23-3 -1.8XN3/TR XD18 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -1.8XK3/TR -1.8XK3 Tape and Reel, 1-1.8XK3L/TR -1.8XK3L Tape and Reel, 1 SOT23-3 -2.5XN3/TR XD25 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -2.5XK3/TR -2.5XK3 Tape and Reel, 1-2.5XK3L/TR -2.5XK3L Tape and Reel, 1 SOT23-3 -2. 7XN3/TR XD27 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -2. 7XK3/TR -2. 7XK3 Tape and Reel, 1-2. 7XK3L/TR -2. 7XK3L Tape and Reel, 1 SOT23-3 -2.8XN3/TR XD28 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -2.8XK3/TR -2.8XK3 Tape and Reel, 1-2.8XK3L/TR -2.8XK3L Tape and Reel, 1 SOT23-3 -2.9XN3/TR XD29 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -2.9XK3/TR -2.9XK3 Tape and Reel, 1-2.9XK3L/TR -2.9XK3L Tape and Reel, 1 SOT23-3 -3.XN3/TR XD3 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -3.XK3/TR -3.XK3 Tape and Reel, 1-3.XK3L/TR -3.XK3L Tape and Reel, 1 SOT23-3 -3.3XN3/TR XD33 Tape and Reel, 3 SOT89-3 - 4 C to +125 C -3.3XK3/TR -3.3XK3 Tape and Reel, 1-3.3XK3L/TR -3.3XK3L Tape and Reel, 1 ABSOLUTE MAXIMUM RATGS to...-.3v to +6V Output Short-Circuit Duration...Infinite OUT to...-.3v to (V +.3V) Power Dissipation, PD @ TA = 25 SOT23-3...4W SOT89-3...571W Package Thermal Resistance SOT23-3, θja... 25 /W SOT89-3, θja...175 C/W Operating Temperature Range......- 4 C to +125 C Junction Temperature...+15 C Storage Temperature...- 65 C to +15 C Lead Temperature (soldering, 1s)...26 C ESD Susceptibility HBM...4V MM...4V Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. P DESCRIPTION NAME OUT FUNCTION Regulator Input. Supply voltage can range from 2.5V to 5.5V. Ground. Regulator Output. 2
ELECTRICAL CHARACTERISTICS (V = V OUT (NOMAL) +.5V (1), T A = - 4 C to +125 C, unless otherwise noted. Typical values are at T A = + 25 C.) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS Input Voltage V 2.5 5.5 V Output Voltage Accuracy (1) IOUT =1mA to 3mA, TA = +25 C VOUT +.5V V 5.5V -3 +3 % Maximum Output Current 3 ma Current Limit ILIM 31 75 ma Ground Pin Current Dropout Voltage (2) Line Regulation (1) IQ ΔVLNR No load, 77 145 IOUT = 3mA, IOUT = 1mA.8 IOUT = 3mA 3 3 V = 2.5V or (VOUT +.5V) to 5.5V, IOUT = 1mA µa mv.3.15 %/V Load Regulation ΔVLDR IOUT =.1mA to 3mA, COUT = 1µF.8.2 %/ma Power Supply Rejection Rate PSRR ILOAD = 5mA, COUT = 1µF THERMAL PROTECTION f = 1Hz, 75 db f = 1KHz, 53 db Thermal Shutdown Temperature TSHDN 16 Thermal Shutdown Hysteresis ΔTSHDN 15 Specifications subject to change without notice. Note 1: V = VOUT(NOMAL) +.5V or 2.5V, whichever is greater. Note 2: The dropout voltage is defined as V - VOUT, when VOUT is 1mV below the value of VOUT for V = VOUT +.5V. (Only applicable for VOUT = +2.5V to +5.V.) 3
TYPICAL OPERATG CHARACTERISTICS V = V OUT (NOMAL) +.5V or 2.5V (whichever is greater), C = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. 2.9 Output Voltage vs.load Current 3.4 Output Voltage vs.load Current Output Voltage(V) 2.85 2.8 2.75 Output Voltage(V) 3.35 3.3 3.25 2.7 1 3 Load Current(mA) 3.2 1 3 Load Current(mA) Ground Pin Current(µA) 19 1 17 16 15 14 13 11 1 9 7 Ground Pin Current vs.load Current 1 3 Load Current(mA) Ground Pin Current(µA) 16 4 Ground Pin Current vs.input Voltage I load = 5mA No Load 1 2 3 4 5 6 Input Voltage(V) Ground Pin Current(µA) 16 4 Ground Pin Current vs.input Voltage I load = 5mA No Load Output Voltage(V) 6 5 4 3 2 1 Output Voltage vs.input Voltage No Load 1 2 3 4 5 6 Input Voltage(V) 1 2 3 4 5 6 Input Voltage(V) 4
TYPICAL OPERATG CHARACTERISTICS V = V OUT (NOMAL) +.5V or 2.5V (whichever is greater), C = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. PSRR(dB) 9 7 6 5 4 3 2 1 Power-Supply Rejection Ratio vs.frequency C OUT = 1μF I LOAD = 5mA V = V OUT +1V C OUT = 1μF.1.1 1 1 1 1 Frequency(kHz) Current limit(ma) 1 9 7 6 5 4 3 Current limit vs.temperature 1-4 -2 2 4 6 1 14 Temperature( ) 5
TYPICAL OPERATG CHARACTERISTICS V = V OUT (NOMAL) +.5V or 2.5V (whichever is greater), C = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. 2.9 Output Voltage vs.temperature I LOAD = 15mA 3.4 Output Voltage vs.temperature I LOAD = 15mA Output Voltage(V) 2.85 2.8 2.75 Output Voltage(V) 3.35 3.3 3.25 2.7-4 -2 2 4 6 1 14 Temperature( ) 3.2-4 -2 2 4 6 1 14 Temperature( ) Ground Pin Current(μA) 26 24 22 1 16 14 1 6 Ground Pin Current vs.temperature I LOAD = 15mA -4-2 2 4 6 1 14 Temperature( ) Dropout Voltage(mV) 44 4 36 32 2 24 16 4 Dropout Voltage vs.load Current T A = -4 T A = +125 T A = +85 T A = +25 3 6 9 15 1 21 24 27 3 Load Current(mA) Dropout Voltage(mV) 36 33 3 27 24 21 1 15 9 6 3 Dropout Voltage vs.load Current T A = -4 T A = +85 T A = +25 T A = +125 3 6 9 15 1 21 24 27 3 Load Current(mA) 6
Application Notes When LDO is used in handheld products, Attention must be paid to voltage spike which would damage. In such applications, voltage spike will be generated at changer interface and V BUS pin of USB interface when changer adapters and USB equipments are hot-inserted. Besides this, handheld products will be tested on the production line on the condition of no battery. Test Engineer will apply power from the connector pin which connects with positive pole of the battery. When external power supply is turned on suddenly, the voltage spike will be generated at the battery connector. The voltage spike will be very high, it always exceeds the absolute maximum input voltage (6.V) of LDO. In order to get robust design. Design Engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to eliminate such voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to remove voltage spike in cell phone design. The schematic is shown in below: Vcc Input BZM55B5V6 1uF C 1 V OUT C 2 4.7uF V OUT 7
PACKAGE OUTLE DIMENSIONS SOT23-3 D b θ.2 Symbol Dimensions In Millimeters Dimensions In Inches L Min Max Min Max A 1.5 1.25.41.49 A1..1..4 E1 E A2 1.5 1.15.41.45 b.3.4.12.16 c.1..4.8 e1 e A1 L C D 2.82 3.2.111.119 E 1.5 1.7.59.67 E1 2.65 2.95.14.116 e.95typ.37typ e1 1. 2..71.79 L.7REF.28REF A2 A L1.3.6.12.24 θ 8 8 8
PACKAGE OUTLE DIMENSIONS SOT89-3 D E1 L b D1 e1 e E c A Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.4 1.6.55.63 b.32.52.13.2 b1.36.56.14.22 c.35.44.14.17 D 4.4 4.6.173.181 D1 1.4 1..55.71 E 2.3 2.6.91.12 E1 3.94 4.25.155.167 e 1.5TYP.6TYP e1 2.9 3.1.114.122 L.9 1.1.35.43 9
REVISION HISTORY Location Page 12/6 Data Sheet changed from REV. A to REV. B Changed to ABSOLUTE MAXIMUM RATGS........................................................................ 2 Added Application Notes............................................................................................7 3/7 Data Sheet changed from REV. B to REV. C Changed to TYPICAL OPERATG CHARACTERISTICS............................................................... 5 Shengbang Microelectronics Co, Ltd Unit 3, ChuangYe Plaza No.5, TaiHu Northern Street, YingBin Road Centralized Industrial Park Harbin Development Zone Harbin, HeiLongJiang 1578 P.R. China Tel.: 86-451-84348461 Fax: 86-451-8438461 www.sg-micro.com 1