SGM2021 Low Power, Low Dropout, Linear Regulators

Transcription

1 GENERAL DESCRIPTION The series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input voltage. They are the perfect choice for low voltage, low power applications. A low ground current makes this part attractive for battery operated power systems. The series also offer ultra low dropout voltage to prolong battery life in portable electronics. The features include foldback current limit and thermal shut-down protection. FEATURES Low Output Noise Low Dropout Voltage Maximum Output Current: 3mA Thermal-Overload Protection Output Current Limit Available in Multiple Output Voltage Versions Fixed Outputs of.9v, 1.2V, 1.3V, 1.5V, 1.8V, 2.1V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 2.9V, 3.V, 3.1V, 3.2V, 3.3V, 3.6V, 4.2V, 5.V -4 to +85 Operating Temperature Range Available in Green SOT-23-3 Package The has Green SOT-23-3 package. It operates over an ambient temperature range of -4 C to +85 C. APPLICATIONS Cellular Telephones Cordless Telephones PHS Telephones PCMCIA Cards Modems MP3 Player Hand-Held Instruments Palmtop Computers Electronic Planners Portable/Battery-Powered Equipment PRODUCT NAME STRUCTURE -XXX X XX G / TR Tape and Reel Green Product Package Type N3 SOT-23-3 Operating Temperature Range Y -4 to +85 Output Voltage.9.9V V V V V V 5. 5.V REV. A. 2

2 ABSOLUTE MAXIMUM RATINGS IN to GND V to 6V Output Short-Circuit Duration...Infinite OUT to GND V to (V IN +.3V) Power Dissipation, P T A = 25 SOT W Package Thermal Resistance SOT-23-3, θ JA /W Operating Temperature Range C to +85 C Junction Temperature C Storage Temperature C to +15 C Lead Temperature (soldering, 1s) 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. CAUTION TYPICAL APPLICATION CIRCUIT This integrated circuit can be damaged by ESD if you don t pay attention to ESD protection. SGMICRO recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. INPUT 2.5V to 5.5V C IN 1μF IN OUT OUTPUT C OUT 1μF SGMICRO reserves the right to make any change in circuit GND design, specification or other related things if necessary without notice at any time. Please contact SGMICRO sales office to get the last datasheet. PIN CONFIGURATION (TOP VIEW) PIN DESCRIPTION SOT-23-3 NAME FUNCTION GND 1 YLxx 3 IN 3 IN 1 GND Ground. Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND. OUT 2 2 OUT Regulator Output. SOT-23-3 NOTE: (1) The location of pin 1 on the YLxx is determined by orienting the package marking as shown. (2) xx is the output voltage code. (For Example: when the output voltage is 1.8V, it is expressed as 18.) 2

3 ELECTRICAL CHARACTERISTICS (V IN = V OUT (NOMINAL) +.5V (1), T A = +25 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V IN V Output Voltage Accuracy (1) I OUT =.1mA, T A = +25 C % Maximum Output Current 3 ma Current Limit I LIM 31 5 ma Ground Pin Current I Q No load µa I OUT = 1mA 1 Dropout Voltage (2) I OUT = 3mA mv Line Regulation (1) V LNR V IN = 2.5V or (V OUT +.5V) to 5.5V I OUT = 1mA.3.6 %/V Load Regulation V LDR I OUT =.1mA to 3mA, C OUT = 1µF, V OUT > 2V I OUT =.1mA to 3mA, C OUT = 1µF, V OUT 2V %/ma Output Voltage Noise e n f = 1Hz to 1kHz, C OUT = 1µF 12 µv RMS Power Supply Rejection Rate THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis PSRR I LOAD = 5mA, f = 217Hz 62 db C OUT = 1µF, V IN = V OUT+1V f = 1Hz 69 db T SHDN 15 T SHDN 15 Note 1: V IN = V OUT (NOMINAL) +.5V or 2.5V, whichever is greater. Note 2: The dropout voltage is defined as V IN - V OUT, when V OUT is 1mV below the value of V OUT for V IN = V OUT +.5V. (Only applicable for V OUT = +2.5V to +5.V.) 3

4 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. 1 Power-Supply Rejection Ratio vs. Frequency PSRR (db) 6 4 C OUT = 1µF 2 I LOAD = 5mA V IN = V OUT + 1V V OUT = 3.3V C OUT = 1µF Frequency (khz) 4

5 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. Output Voltage vs. Load Current Output Voltage vs. Load Current Output Voltage (V) Output Voltage (V) YN3G -1.8YN3G Ground Pin Current vs. Load Current 24 Ground Pin Current vs. Load Current YN3G YN3G Ground Pin Current vs. Input Voltage 16 Ground Pin Current vs. Input Voltage YN3G YN3G Input Voltage (V) Input Voltage (V) 5

6 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted. Output Voltage (V) Output Voltage vs. Input Voltage -2.8YN3G Input Voltage (V) Output Voltage (V) Output Voltage vs. Input Voltage -1.8YN3G Input Voltage (V) Ground Pin Current vs.temperature -2.8YN3G Ground Pin Current vs.temperature YN3G Current limit vs. Temperature 6 Current limit vs. Temperature 9 55 Current limit (ma) 7 6 Current limit (ma) YN3G YN3G

7 TYPICAL OPERATING CHARACTERISTICS V IN = V OUT (NOMINAL) +.5V or 2.5V (whichever is greater), C IN = 1µF, C OUT = 1µF, T A = +25, unless otherwise noted..6 Output Voltage Accuracy vs. Temperature.6 Output Voltage Accuracy vs. Temperature Output Voltage Accuracy (%) YN3G Output Voltage Accuracy (%) YN3G Dropout Voltage (mv) Dropout Voltage vs. Load Current T A = -4 T A = +25 T A = YN3G Output Noise (µv RMS ) Output Noise vs. Load Current C OUT = 1µF f = 1Hz to1khz V OUT = 2.8V V OUT = 3.3V V OUT = 3.V

8 APPLICATION NOTE When LDO is used in handheld products, attention must be paid to voltage spikes which could damage. In such applications, voltage spikes will be generated at charger interface and V BUS pin of USB interface when charger adapters and USB equipments are hot-plugged. Besides this, handheld products will be tested on the production line without 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 spikes will be generated at the battery connector. The voltage spikes will be very high, and 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 spikes in cell phone designs. The schematic is shown below. Vcc Input BZM55B5V6 1µF C 1 3 IN GND OUT 2 C 2 4.7µF V OUT 1 8

9 EXPANDED ORDERING INFORMATION MODEL V OUT(V) PIN- PACKAGE ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION -.9.9V SOT YN3G/TR YL9 Tape and Reel, V SOT YN3G/TR YL12 Tape and Reel, V SOT YN3G/TR YL13 Tape and Reel, V SOT YN3G/TR YL15 Tape and Reel, V SOT YN3G/TR YL18 Tape and Reel, V SOT YN3G/TR YL21 Tape and Reel, V SOT YN3G/TR YL25 Tape and Reel, V SOT YN3G/TR YL26 Tape and Reel, V SOT YN3G/TR YL27 Tape and Reel, V SOT YN3G/TR YL28 Tape and Reel, V SOT YN3G/TR YL2J Tape and Reel, V SOT YN3G/TR YL29 Tape and Reel, V SOT YN3G/TR YL3 Tape and Reel, V SOT YN3G/TR YL31 Tape and Reel, V SOT YN3G/TR YL32 Tape and Reel, V SOT YN3G/TR YL33 Tape and Reel, V SOT YN3G/TR YL36 Tape and Reel, V SOT YN3G/TR YL42 Tape and Reel, V SOT YN3G/TR YL5 Tape and Reel, 3 9

10 PACKAGE OUTLINE DIMENSIONS SOT-23-3 D θ b.2 L E1 E e c e1 A A1 A2 Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max A A A b c D E E e.95 BSC.37 BSC e1 1.9 BSC.75 BSC L θ 8 8 1