UM4750 300mA, Micropower, Dual Channel VLDO Linear Regulator UM4750S-xx SOT23-6 UM4750DA-xx DFN6 2.0×2.0 UM4750DB-xx DFN8 3.0×3.0 General Description The UM4750 series are dual channel VLDO (very low dropout) linear regulators designed for low power portable applications. The range of output voltage is from 1.2V to 5.0V while operated from 2.5V to 5.5V input. Typical output noise is only 200μVRMS and maximum dropout is just 200mV at the load current of 100mA. The UM4750 series offer high output voltage accuracy, excellent transient response, stability with ultra low ESR ceramic capacitors as small as 1μF, thermal overload protection and output current limiting. The UM4750S-xx series are available in a low profile SOT23-6 package, the UM4750DA-xx series are available in a low profile DFN6 2.0×2.0 package, and UM4750DB-xx series are available in a low profile DFN8 3.0×3.0 package. Applications Features Pin Configurations VOUT1 VIN Very Low Dropout: 200mV(max) at 100mA Maximum Input Voltage: 5.5V Low Noise:200μVRMS (10Hz to 100kHz) Fast Transient Response Dual LDO Outputs(300mA/300mA) Output Current Limit Stable with 1μF Output Capacitor Thermal Overload Protection Low Profile SOT23-6, 6-Lead DFN 2.0×2.0 and 8-Lead DFN 3.0×3.0 Packages Top View EN1 6 7XX 1 VOUT2 GND EN2 4 5 2 M Bluetooth/802.11 Cards PDAs and Notebook Computers Portable Instruments and Battery-Powered Systems Cellular Phones 3 M: Month Code UM4750S-xx SOT23-6 ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 1/13 UM4750 VIN 1 6 VOUT1 GND 2 5 VOUT2 EN1 3 4 EN2 7XX M (Top View) Marking Pin1 M: Month Code UM4750DA-xx DFN6 2.0×2.0 VIN 1 EN1 2 GND 8 VOUT1 7 NC GND EN2 3 6 NC 4 5 VOUT2 7XX M (Top View) M: Month Code UM4750DB-xx DFN8 3.0×3.0 Pin Description Pin Number Symbol Function UM4750S-xx UM4750DA-xx UM4750DB-xx 1 5 5 VOUT2 2 2 6 GND Ground 3 4 3 EN2 Enable2 Input, Active High 4 3 2 EN1 Enable1 Input, Active High 5 1 1 VIN Power Supply 6 6 8 VOUT1 - - 4,7 NC Channel2 output voltage Channel1 output voltage No connection Naming Information UM4750 Channel 2 Output Voltage Channel 1 Output Voltage Package Type S: SOT23-6 DA: DFN6 2.0×2.0 DB: DFN8 3.0×3.0 ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 2/13 UM4750 Available Voltage Version Code A Voltage 5 Code F Voltage 4.2 Code L Voltage 3.3 Code R Voltage 1.8 B 4.8 G 4 M 3 S 1.5 C 4.7 H 3.8 N 2.8 T 1.3 D 4.5 J 3.6 P 2.7 U 1.2 E 4.3 K 3.5 Q 2.5 Ordering Information Part Number UM4750S-RN UM4750S-RL UM4750S-NR UM4750S-xx UM4750DA-xx UM4750DB-xx Packaging Type SOT23-6 DFN6 2.0×2.0 DFN8 3.0×3.0 Marking Code UDS UDT UGS 7XX 7XX 7XX Shipping Qty 3000pcs/7Inch Tape & Reel Absolute Maximum Ratings (Note 1) Symbol VIN VOUT TJ TSTG TL Parameter Value Unit Supply Voltage on IN Pin -0.3 to +6.5 V Voltage on OUT Pin -0.3 to +7.5 V Operating Junction Temperature (Notes 2, 3) -40 to +125 °C Storage Temperature Range -65 to +150 °C +300 2000 °C Lead Temperature for Soldering 10 seconds ESD Susceptibility HBM PD Power Dissipation at TA = 25°C SOT23-6 0.5 DFN6 2.0×2.0 0.7 DFN8 3.0×3.0 0.9 V W Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The device is guaranteed to meet performance specifications from 0℃ to 70℃. Specifications over the – 40℃ to 125℃ operating junction temperature range are guaranteed by design, characterization and correlation with statistical process controls. Note 3: This IC includes over temperature protection circuit inside that is intended to protect the device during momentary overload conditions. Over temperature protection trip point is around 160℃. Continuous operation above the specified maximum operating junction temperature may impair device reliability. ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 3/13 UM4750 Recommended Operating Conditions (Note 4) Supply Input Voltage Enable Input Voltage Junction Temperature Range 2.5V to 5.5V 0V to 5.5V -40°C to 125°C Ambient Temperature Range -40°C to 85°C Note 4: The device is not guaranteed to function outside its operating conditions. Internal Block Diagram EN1 Shutdown and Logic Control VIN - 1.2V + Error Amplifier VREF Current-Limit Thermal Protection EN2 VOUT1 GND Shutdown and Logic Control 1.2V + Error Amplifier Current-Limit VOUT2 GND ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 4/13 UM4750 Electrical Characteristics VCC=+5V±10%,CIN=1μF,COUT1=COUT2=1μF,TA=-40℃ to +85℃.Typical conditions are at Vcc=5V, TA=25℃. Parameter Symbol Test Conditions Min Typ Max Unit Input Voltage VIN 2.5 5.5 V Range Output Voltage VOUT 1.2 5.0 V Range Operating Quiescent Current IQ IOUT=0mA Shut Down Current IQ_SD EN Input Current Output Current Output Voltage Accuracy Dropout Voltage Output Current Limit Startup Time Response EN Input Low Voltage EN Input High Voltage Output Voltage TC Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis IEN IOUT Line Regulation Load Regulation ESD Rating μA EN1=EN2=GND 2 μA EN=VIN or GND 1 μA mA 2 % 100 200 mV 450 700 mA 300 IOUT=10mA ΔVDO -2 IOUT=100mA, VOUT>2.8V ILIMT 330 t RL=68Ω, COUT=1μF VIL VIN=2.5V to5.5V VIH μs 20 0.3×VIN 0.7×VIN V V 100 ppm/℃ TSHDN 150 ℃ ΔTSHDN 30 ℃ LNR LDR Output Voltage Noise Power Supply Ripple Rejection 190 110 PSRR 1.5<VOUT≤4V VOUT+1V≤VIN≤5.5V, IOUT=10mA 4V<VOUT≤5V or 1.2V≤VOUT≤1.5V VOUT+1V≤VIN≤5.5V and VIN>2.5V,IOUT=10mA VOUT≤4V 1mA≤IOUT≤300mA 4V<VOUT≤5V 1mA≤IOUT≤300mA 10Hz to 100KHz CIN=1μF, IOUT=10mA 0.3 %/V 0.6 0.6 % 0.8 200 f=100Hz 60 f=1kHz Human Body Mode 45 2 VIN=VOUT+1V IOUT=100mA μVRMS dB kV ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 5/13 UM4750 Typical Performance Characteristics Quiescent Current vs Input Voltage Dropout Voltage vs Output Current 520 130 480 125 440 Dropout Voltage(mV) 115 110 105 100 95 90 85 80 VOUT2=1.8V 360 320 280 240 200 160 120 80 UM4750S-NR 75 400 VOUT1=2.8V 0 70 2.5 3 3.5 4 4.5 5 5.5 6 0 25 50 75 100 Input Voltage (V) 2.82 2.8 1.86 2.81 2.79 1.84 VOUT1 VOUT1=2.8V 1.82 2.77 1.8 1.78 VOUT2 VOUT2=1.8V 2.75 1.76 2.74 1.74 UM4750S-NR 2.73 3 3.5 4 200 225 250 275 4.5 5 5.5 1.85 1.84 2.80 1.83 VOUT2=1.8V 2.79 1.82 2.78 1.81 2.77 1.8 2.76 1.79 1.78 UM4750S-NR 2.73 6 0 50 Input Voltage(V) 100 150 200 250 1.77 1.76 300 Output Current(mA) Output Voltage vs Temperature 2.84 1.88 1.86 2.80 1.84 2.78 1.82 2.76 1.80 2.74 1.78 VOUT2=1.8V UM4750S-NR 2.72 2.70 1.76 Output_2 Voltage(V) Output_1 Voltage(V) VIN=5.0V VOUT1=2.8V 2.82 UM4750S-NR 1.74 -40 -20 0 20 40 60 300 1.86 VOUT1=2.8V 2.74 1.7 2.5 175 2.75 1.72 2.72 Output_1 Voltage(V) 2.83 1.88 Output_2 Voltage(V) 1.9 2.81 2.76 150 Outpout Voltage vs Output Current 2.82 2.78 125 Output Current(mA) Output Voltage vs Input Voltage Output_1 Voltage(V) UM4750S-NR 40 80 100 120 140 Temperature(℃) ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 6/13 Output_2 Voltage(V) Quiescent Current (uA) 120 UM4750 Typical Performance Characteristics (Continued) Line Transient Response Line Transient Response VIN=3.8V to 4.8V VIN=3.5V to 4.5V (2V/div) (2V/div) VOUT1=2.8V, IOUT1=10mA VOUT2=1.8V, IOUT2=10mA (50mV/div) (50mV/div) UM4750S-NR 100μs/div UM4750S-NR 100μs/div Load Transient Response Iload=20mA to 220mA 100mA/div Load Transient Response Iload=10mA to 120mA 50mA/div VIN=2.8V, VOUT2=1.8V VIN=3.8V, VOUT1=2.8V 200mV/div UM4750S-NR 100μs/div 100mV/div UM4750S-NR 100μs/div ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 7/13 UM4750 Typical Application Circuit VIN VIN CIN 1μF VOUT1 VOUT1 COUT1 1μF EN1 Chip Enable VOUT2 EN2 VOUT2 COUT2 1μF GND Pin Function VIN : Unregulated input supply. A small 1.0uF capacitor should be connected from VIN to GND. GND : Ground and Heat Sink. Solder to a ground plane or large pad to maximize heat dissipation. EN: Enable, Active High. This pin is used to put the UM4750 into shutdown. The EN pin cannot be left floating and must be tied to the input pin if not used. VOUT : Regulated Voltage Output. Applications Information The UM4750 series are 300mA very low dropout regulators with micropower quiescent current and shutdown. The maximum dropout is only 200mV at the load current of 100mA. Output voltage noise is as low as 200μVRMS over a 10Hz to 100kHz bandwidth. In addition to the low quiescent current, the UM4750 regulators incorporate several protection features which make them ideal for use in battery-powered systems. Devices include current limit and thermal overload protection. Output Capacitance and Transient Response The UM4750 regulators are designed to be stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. A minimum output capacitor of 1μF with an ESR of 0.3Ω or less is recommended to ensure stability. The UM4750 series are micropower devices and output transient response will be a function of output capacitance. Larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. Extra consideration must be given to the use of ceramic capacitors. The X5R and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. The X7R type has better stability across temperature, while the X5R is less expensive and is available in higher values. Board Layout Recommendations to Improve PSRR and Noise Performance To improve AC performance such as PSRR, output noise, and transient response, it is recommended that the board be designed with separate ground planes for Vin and Vout, with each ground plane connected only at the GND pin of the device. In addition, the ground connection for the output capacitor should connect directly to the GND pin of the device. High ESR capacitors may degrade PSRR. ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 8/13 UM4750 Internal Current Limit The UM4750 internal current limits help protect the regulator during fault conditions. During current limit, the output sources a fixed amount of current that is largely independent of output voltage. For reliable operation, the device should not be operated in a limit state for extended periods of time. The PMOS pass element in the UM4750 has a built-in body diode that conducts current when the voltage at OUT exceeds the voltage at IN. This current is not limited, so if extended reverse voltage operation is anticipated, external limiting to 5% of rated output current may be appropriate. Dropout Voltage The UM4750 use a PMOS pass transistor to achieve low dropout. When (Vin-Vout) is less than the dropout voltage, the PMOS pass device is in its linear region of operation and the input-to-output resistance is the Rds of the PMOS pass element. Vdrop approximately scales with output current because the PMOS device behaves like a resistor in dropout. Thermal Protection Thermal protection disables the output when the junction temperature rises to approximately +150℃ allowing the device to cool. When the junction temperature cools to approximately +120℃ the output circuit is again enabled. Depending on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may circle on and off. This cycling limits the dissipation of the regulator, protecting it from damage due to overheating. Thermal Considerations Thermal protection limits power dissipation in UM4750. When the operation junction temperature exceeds 150℃, the OTP circuit starts the thermal shutdown function and turns the pass element off. The pass element turns on again after the junction temperature cools by 25℃. For continuous operation, do not exceed absolute maximum operation junction temperature 125℃. The power dissipation definition in device is: PD =(VIN -VOUT1)×IOUT1 + (VIN -VOUT2)×IOUT2 + VIN×IQ The maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junctions to ambient. The recommended maximum power dissipation of SOT23-6, DFN6 2.0×2.0 and DFN8 3.0×3.0 packages for 25℃ ambient temperature are 0.5W, 0.7W and 0.9W. ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 9/13 UM4750 Package Information UM4750S-xx SOT23-6 Outline Drawing D 5 4 1 2 3 L L1 E E1 6 Symbol θ b e c 20 e1 Top View A A2 A1 End View Side View A A1 A2 b c D E E1 e e1 L L1 θ DIMENSIONS MILLIMETERS Min Max 1.050 1.250 0.000 0.100 1.050 1.150 0.300 0.500 0.100 0.200 2.820 3.020 1.500 1.700 2.650 2.950 0.950REF 1.800 2.000 0.600REF 0.300 0.600 0° 8° INCHES Min Max 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.020 0.004 0.008 0.111 0.119 0.059 0.067 0.104 0.116 0.037REF 0.071 0.079 0.023REF 0.012 0.024 0° 8° Land Pattern 2.4 0.9 0.7 0.95 0.95 NOTES: 1. Compound dimension: 2.92×1.60； 2. Unit: mm; 3. General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. 7XX M Tape and Reel Orientation ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 10/13 UM4750 UM4750DA-xx DFN6 2.0×2.0 A Outline Drawing A3 A1 Side View D D2 D2/2 E2/2 L E E2 R 0.100 b e Symbol A A1 A3 b D E D2 E2 e L DIMENSIONS MILLIMETERS Min Typ 0.57 0.60 0 0.03 0.15TYP 0.20 0.25 1.95 2.00 1.95 2.00 1.45 1.55 0.76 0.86 0.65TYP 0.30 0.35 Max 0.63 0.05 0.30 2.075 2.075 1.65 0.96 0.40 Bottom View 0.65 1.00 1.20 2.50 Land Pattern 0.65 0.25 NOTES: 1. Compound dimension: 2.00×2.00; 2. Unit: mm; 3. General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation 7XX M ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 11/13 UM4750 UM4750DB-xx DFN8 3.0×3.0 Outline Drawing Symbol D2 D A E2 A3 0.002 0.008 REF 0.01 0.014 e D 2.95 3.05 0.116 0.12 Bottom View E 2.95 3.05 0.116 0.12 D2 2.3 2.55 0.091 0.1 E2 1.5 1.75 0.059 0.069 A3 A1 0.2 REF 0 0.35 A Side View 0.05 0.25 b Top View 0 b L E A1 DIMENSIONS MILLIMETERS INCHES Min Max Min Max 0.7 0.8 0.028 0.031 e L 0.650BSC 0.3 0.5 0.026BSC 0.012 0.02 0.75 1.7 3.6 Land Pattern 0.65 0.35 NOTES: 1. Compound dimension: 3.00×3.00; 2. Unit: mm; 3. General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation 7XX M ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 12/13 UM4750 IMPORTANT NOTICE The information in this document has been carefully reviewed and is believed to be accurate. Nonetheless, this document is subject to change without notice. Union assumes no responsibility for any inaccuracies that may be contained in this document, and makes no commitment to update or to keep current the contained information, or to notify a person or organization of any update. Union reserves the right to make changes, at any time, in order to improve reliability, function or design and to attempt to supply the best product possible. Union Semiconductor, Inc Add: Unit 606, No.570 Shengxia Road, Shanghai 201210 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com ________________________________________________________________________ http://www.union-ic.com Rev.06 Dec.2014 13/13