SGM2008 Low Power, Low Dropout, 300mA, RF - Linear Regulators GENERAL DESCRIPTION FEATURES The SGM2008/A series low-power, low-noise, low-dropout, CMOS linear voltage regulators operate from a 2.5V to 5.5V input and deliver up to 300mA. They are the perfect choice for low voltage, low power applications. An ultra low ground current（200µA at 300mA output ) makes these part attractive for battery operated power systems. The SGM2008/A series also offer ultra low dropout voltage (300mV at 300mA output) to prolong battery life in portable electronics. Systems requiring a quiet voltage source, such as RF applications, will benefit from the SGM2008/A series’ ultra low output noise (30µVRMS) and high PSRR. An external noise bypass capacitor connected to the device’s BP pin can further reduce the noise level. - Low Output Noise: 30µVRMS typ(10Hz to 100KHz) - Ultra-Low Dropout Voltage: 300mV at 300mA output - Low 77µA No-Load Supply Current - Low 200µA Operating Supply Current - at 300mA Output High PSRR (73dB at 1KHz) Thermal-Overload Protection Output Current Limit 10nA high Logic-Controlled Shutdown Available in Multiple Output Voltage Versions Fixed Outputs of 1.8V, 2.5V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V, 3.3V and 3.6V The output voltage is preset to voltages in the range of 1.5V to 3.6V. Other features include a 10nA high logic-controlled shutdown mode, foldback current limit and thermal shut- down protection. Devices come in 5-pin SOT23 package. PIN CONFIGURATIONS（TOP VIEW） SGM2008 APPLICATIONS Cellular Telephones Cordless Telephones PHS Telephones PCMCIA Cards Modems MP3 Player Hand-Held Instruments Palmtop Computers Electronic Planners Portable/Battery-Powered Equipment Shengbang Microelectronics Co, Ltd Tel: 86/451/84348461 www.sg-micro.com IN 1 GND 2 EN 3 5 OUT 4 BP SOT23-5 REV. A ORDERING INFORMATION MODEL VOUT(V) PINPACKAGE SPECIFIED TEMPERATURE RANGE ORDERING NUMBER PACKAGE MARKING PACKAGE OPTION SGM2008-1.8 1.8V SOT23-5 - 40°C to +125°C SGM2008-1.8XN5/TR X818 Tape and Reel, 3000 SGM2008-2.5 2.5V SOT23-5 - 40°C to +125°C SGM2008-2.5XN5/TR X825 Tape and Reel, 3000 SGM2008-2.7 2. 7V SOT23-5 - 40°C to +125°C SGM2008-2. 7XN5/TR X827 Tape and Reel, 3000 SGM2008-2.8 2.8V SOT23-5 - 40°C to +125°C SGM2008-2.8XN5/TR X828 Tape and Reel, 3000 SGM2008-2.85 2.85V SOT23-5 - 40°C to +125°C SGM2008-2.85XN5/TR X82J Tape and Reel, 3000 SGM2008-2.9 2.9V SOT23-5 - 40°C to +125°C SGM2008-2.9XN5/TR X829 Tape and Reel, 3000 SGM2008-3.0 3.0V SOT23-5 - 40°C to +125°C SGM2008-3.0XN5/TR X830 Tape and Reel, 3000 SGM2008-3.3 3.3V SOT23-5 - 40°C to +125°C SGM2008-3.3XN5/TR X833 Tape and Reel, 3000 SGM2008-3.6 3.6V SOT23-5 - 40°C to +125°C SGM2008-3.6XN5/TR X836 Tape and Reel, 3000 ABSOLUTE MAXIMUM RATINGS IN to GND.....................................................................- 0.3V to +6V Output Short-Circuit Duration ...........................................Infinite Package Thermal Resistance SOT23-5, θJA....................................................................... 250℃/W Operating Temperature Range...........................- 40°C to +125°C Junction Temperature...........................................................+150°C Storage Temperature.............................................- 65°C to +150°C Lead Temperature (soldering, 10s).......................................260°C EN to GND.................................................................- 0.3V to +6V OUT, BP to GND......................................- 0.3V to (VIN + 0.3V) Power Dissipation, PD @ TA = 25℃ SOT23-5 .....................................................................................0.4W 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. 2 SGM2008 ELECTRICAL CHARACTERISTICS (VIN = VOUT (NOMINAL) + 0.5V (1), TA = - 40°C to +125°C, unless otherwise noted. Typical values are at TA = + 25°C.) PARAMETER Input Voltage SYMBOL CONDITIONS MIN VIN IOUT =1mA to 300mA, TA = +25°C VOUT + 0.5V≤VIN≤ 5.5V Output Voltage Accuracy(1) Maximum Output Current Current Limit Ground Pin Current ILIM IQ Line Regulation(1) ΔVLNR Load Regulation ΔVLDR Power Supply Rejection Rate MAX UNITS 2.5 5.5 V -3 +3 % 300 Dropout Voltage (2) Output Voltage Noise TYP en PSRR 310 mA 750 mA No load, EN = 0.4V 77 IOUT = 300mA, EN = 0.4V 200 IOUT = 1mA 0.8 IOUT = 300mA 300 380 0.03 0.15 %/V 0.0008 0.002 %/mA VIN = 2.5V or (VOUT + 0.5V) to 5.5V, IOUT = 1mA IOUT = 0.1mA to 300mA, COUT = 1µF f = 10Hz to 100KHz, CBP = 0.01µF, COUT = 10µF 145 µA mV 30 µVRMS CBP = 0.1µF, ILOAD = 50mA, f = 100Hz, 78 dB COUT = 1µF f = 1KHz, 73 dB SHUTDOWN EN Input Threshold VIH VIL 2.0 VIN = 2.5V to 5.5V 0.4 TA = +25°C 0.01 TA = +125°C 0.01 TA = +25°C 0.01 TA = +125°C 0.01 TA = +25°C 30 µs TSHDN 160 ℃ ΔTSHDN 15 ℃ EN Input Bias Current IB(SHDN) EN = 0V and EN = 5.5V Shutdown Supply Current IQ(SHDN) EN = 2.0V CBP = 0.01µF Shutdown Exit Delay(3) COUT = 1µF, No load 1 V 1 µA µA THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis Specifications subject to change without notice. Note 1: VIN = VOUT(NOMINAL) + 0.5V or 2.5V, whichever is greater. Note 2: The dropout voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT for VIN = VOUT + 0.5V. (Only applicable for VOUT = +2.5V to +5.0V.) Note 3: Time needed for VOUT to reach 95% of final value. ３ SGM2008 TYPICAL OPERATION CIRCUIT INPUT 2.5V TO 5.5V OUTPUT OUT IN CIN 1μF OFF ON SGM2008 EN BP GND COUT 1μF CBP 0.01μF PIN DESCRIPTION PIN NAME FUNCTION 1 IN 2 GND 3 EN Shutdown Input. A high reduces the supply current to 10nA. Connect to GND for normal operation. 4 BP Reference-Noise Bypass. Bypass with a low-leakage 0.01µF ceramic capacitor for reduced noise at the output. 5 OUT Regulator Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a 1µF capacitor to GND. Ground. Regulator Output. ４ SGM2008 TYPICAL OPERATING CHARACTERISTICS VIN = VOUT(NOMINAL) + 0.5V or 2.5V (whichever is greater), CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25℃, unless otherwise noted. Output Voltage vs.Load Current 3.4 2.85 3.35 Output Voltage(V) Output Voltage(V) Output Voltage vs.Load Current 2.9 2.8 2.75 3.3 3.25 VOUT = 2.8V VOUT = 3.3V 2.7 3.2 0 100 200 Load Current(mA) 300 0 Ground Pin Current vs.Input Voltage VOUT = 2.8V VOUT = 3.3V VOUT = 2.8V 160 Iload = 50mA 120 80 No Load 40 0 0 100 200 Load Current(mA) 300 0 1 2 3 4 Input Voltage(V) 5 6 Output Voltage vs.Input Voltage Ground Pin Current vs.Input Voltage 6 200 No Load VOUT = 3.3V 5 Iload = 50mA 160 Output Voltage(V) Ground Pin Current(µA) 300 200 200 190 180 170 160 150 140 130 120 110 100 90 80 70 Ground Pin Current(µA) Ground Pin Current(µA) Ground Pin Current vs.Load Current 100 200 Load Current(mA) 120 80 No Load 40 VOUT = 3.3V 4 3 VOUT = 2.8V 2 1 0 0 0 1 2 3 4 Input Voltage(V) 5 6 0 ５ 1 2 3 4 Input Voltage(V) 5 6 SGM2008 TYPICAL OPERATING CHARACTERISTICS VIN = VOUT(NOMINAL) + 0.5V or 2.5V (whichever is greater), CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25℃, unless otherwise noted. Output Voltage vs.Temperature Output Voltage vs.Temperature 2.9 3.4 ILOAD = 150mA 3.35 Output Voltage(V) 2.85 2.8 2.75 3.3 3.25 VOUT = 3.3V VOUT = 2.8V 3.2 2.7 -40 -20 0 20 40 60 80 Temperature(℃) -40 -20 100 120 140 440 240 400 220 360 200 VOUT = 3.3V 180 160 140 120 VOUT = 2.8V 100 20 40 60 80 Temperature(℃) 100 120 140 TA = +125℃ 320 TA = +85℃ 280 TA = +25℃ 240 200 TA = -40℃ 160 120 80 ILOAD = 150mA 80 0 Dropout Voltage vs.Load Current 260 Dropout Voltage(mV) Ground Pin Current(μA) Ground Pin Current vs.Temperature VOUT = 2.8V 40 0 60 -40 -20 0 20 40 60 80 Temperature(℃) 0 100 120 140 30 Dropout Voltage vs.Load Current 360 330 300 270 240 210 180 150 120 90 60 30 0 60 90 120 150 180 210 240 270 300 Load Current(mA) Current limit vs.Temperature 1000 900 TA = +125℃ Current limit(mA) Dropout Voltage(mV) Output Voltage(V) ILOAD = 150mA TA = +85℃ TA = +25℃ TA = -40℃ VOUT = 3.3V 800 700 VOUT = 3.3V 600 500 400 VOUT = 2.8V 300 200 100 0 30 60 90 120 150 180 210 240 270 300 Load Current(mA) -40 -20 ６ 0 20 40 60 80 Temperature(℃) 100 120 140 SGM2008 TYPICAL OPERATING CHARACTERISTICS VIN = VOUT(NOMINAL) + 0.5V or 2.5V (whichever is greater), CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25℃, unless otherwise noted. ７ SGM2008 TYPICAL OPERATING CHARACTERISTICS VIN = VOUT(NOMINAL) + 0.5V or 2.5V (whichever is greater), CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25℃, unless otherwise noted. Power-Supply Rejection Ratio vs.Frequency Output Noise Spectral Density vs.Frequency 100 80 Output Noise Spectral Density (μV/√Hz) 90 PSRR(dB) 10 CBP = 0.1μF ILOAD = 50mA VIN = VOUT+1V 70 COUT = 10μF 60 50 CBP = 0.01μF ILOAD = 50mA 1 COUT = 1μF 0.1 40 COUT = 1μF 30 20 0.01 0.1 1 10 Frequency(kHz) 100 0.01 0.01 1000 COUT = 10μF 0.1 1 10 100 1000 Frequency(kHz) Output Noise vs.Load Current 50 VOUT = 3.3V Output Noise(µVRMS) 45 40 35 30 25 20 15 f = 10Hz to 100kHz CBP = 0.01μF COUT = 10μF 10 5 0 1 10 100 Load Current(mA) 1000 ８ SGM2008 Application Notes When LDO is used in handheld products, Attention must be paid to voltage spike which would damage SGM2008. In such applications, voltage spike will be generated at changer interface and VBUS 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 (6.0V) 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: 1 Vcc Input BZM55B5V6 1uF IN VOUT SGM2008 C1 EN 3 GND 2 5 VOUT C2 BP/FP 4 4.7uF 0.01uF Control ９ SGM2008 PACKAGE OUTLINE DIMENSIONS SOT23-5 D θ b 0.20 Symbol L E E1 e C A1 e1 Min Max Min Max 1.250 0.041 0.049 A1 0.000 0.100 0.000 0.004 A2 1.050 1.150 0.041 0.045 b 0.300 0.400 0.012 0.016 c 0.100 0.200 0.004 0.008 D 2.820 3.020 0.111 0.119 E 1.500 1.700 0.059 0.067 E1 2.650 2.950 0.104 0.116 e1 L A A2 Dimensions In Inches 1.050 e １０ Dimensions In Millimeters A L 0 0.950TYP 1.800 2.000 0.700REF 0.037TYP 0.071 0.079 0.028REF L1 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° SGM2008