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Technical content

Features

 Bluetooth/802.11 Cards  PDAs and Notebook Computers  Portable Instruments and Battery-Powered Systems  Cellular Phones  Input Voltage Range: 2.0V to 6.0V  Very Low Dropout: 200mV(max) at 100mA  Low Noise:170μVRMS (UM37512，10Hz to 100kHz)  ±2% Voltage Accuracy at 150mA  Fixed Output Voltage: 1.2V to 5.0V with 100mV interval  Output Current Limit  Stable with 1μF Output Capacitor  Thermal Overload Protection  Low Profile SOT23-5 and SOT353 Package Pin Configurations Top View 5XX UM375xxS M: Month Code SOT23-5

http://www.union-ic.com Rev.05 Nov.2013 2 / 1 2 UM375xx Pin Description VXX UM375xxP M: Month Code SOT353 Pin Number Symbol Function

1 IN Power Supply

2 GND Ground

3 SHDN

Shutdown Input, Active Low

4 NC Not Connected

5 OUT Voltage Regulated Output

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Ordering Information

Part Number Output Voltage Packaging Type Marking Code Shipping Qty UM37550S 5.0V SOT23-5 5DS 3000pcs/7Inch Tape & Reel UM37549S 4.9V 5D9 UM37548S 4.8V 5DR UM37547S 4.7V 5DQ UM37546S 4.6V 5DZ UM37545S 4.5V 5DP UM37544S 4.4V 5DV UM37543S 4.3V 5DN UM37542S 4.2V 5DJ UM37541S 4.1V 5DY UM37540S 4.0V 5DM UM37539S 3.9V 5DT UM37538S 3.8V 5DL UM37537S 3.7V 5DA UM37536S 3.6V 5DH UM37535S 3.5V 5DF UM37534S 3.4V 5DB UM37533S 3.3V 5DE UM37532S 3.2V 5DD UM37531S 3.1V 5EA UM37530S 3.0V 5ER UM37529S 2.9V 5EB UM37528S 2.8V 5EQ UM37527S 2.7V 5EP UM37526S 2.6V 5EZ UM37525S 2.5V 5EN UM37524S 2.4V 5EU UM37523S 2.3V 5EY UM37522S 2.2V 5ET UM37521S 2.1V 5ES UM37520S 2.0V 5EC UM37519S 1.9V 5EF UM37518S 1.8V 5EK UM.37517S 1.7V 5EM UM37516S 1.6V 5EL UM37515S 1.5V 5EJ UM37514S 1.4V 5EH UM37513S 1.3V 5EE UM37512S 1.2V 5ED

http://www.union-ic.com Rev.05 Nov.2013 4 / 1 2 UM375xx Part Number Output Voltage Packaging Type Marking Code Shipping Qty UM37550P 5.0V SOT353 VTA 3000pcs/7Inch Tape & Reel UM37549P 4.9V VT9 UM37548P 4.8V VT8 UM37547P 4.7V VT7 UM37546P 4.6V VT6 UM37545P 4.5V VT5 UM37544P 4.4V VT4 UM37543P 4.3V VT3 UM37542P 4.2V VT2 UM37541P 4.1V VT1 UM37540P 4.0V VJA UM37539P 3.9V VJ9 UM37538P 3.8V VJ8 UM37537P 3.7V VJ7 UM37536P 3.6V VJ6 UM37535P 3.5V VJ5 UM37534P 3.4V VJ4 UM37533P 3.3V VJ3 UM37532P 3.2V VJ2 UM37531P 3.1V VJ1 UM37530P 3.0V VMA UM37529P 2.9V VM9 UM37528P 2.8V VM8 UM37527P 2.7V VM7 UM37526P 2.6V VM6 UM37525P 2.5V VM5 UM37524P 2.4V VM4 UM37523P 2.3V VM3 UM37522P 2.2V VM2 UM37521P 2.1V VM1 UM37520P 2.0V VLA UM37519P 1.9V VL9 UM37518P 1.8V VL8 UM37517P 1.7V VL7 UM37516P 1.6V VL6 UM37515P 1.5V VL5 UM37514P 1.4V VL4 UM37513P 1.3V VL3 UM37512P 1.2V VL2

http://www.union-ic.com Rev.05 Nov.2013 5 / 1 2 UM375xx Absolute Maximum Ratings (Note 1) Symbol Parameter Value Unit VIN Supply Voltage on IN Pin -0.3 to +7.5 V VOUT Voltage on OUT Pin -0.3 to +7.5 V TJ Operating Junction Temperature (Notes 2, 3) -40 to +125 °C TSTG Storage Temperature Range -65 to +150 °C TL Lead Temperature for Soldering 10 seconds +300 °C Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The UM375xx is tested and specified under pulse load conditions such that T J≈TA. The device is guaranteed to meet performance specifications from 0 ℃ to 70℃. Specifications over the – 40 ℃ to 125 ℃ operating junction temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: This IC includes overtemperature protec tion that is intended to protect the device during momentary overload conditions. Junc tion temperature will exceed 125 ℃ when overtemperature protection is active. Continuous operation above the specified maximum operating junction temperature may impair device reliability.

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Electrical Characteristics

VCC=VOUT+1V(VOUT≥1.5V) or VCC=2.5V(VOUT≤1.5V),TA= -40℃ to +85℃. Symbol Parameter Test Conditions Min Typ Max Unit VIN Input Voltage Range 2.0 6 V VOUT Output Voltage Range 1.2 5.0 V IQ Operating Quiescent Current IOUT=0mA 50 120 μA IOUT=300mA 90 130 ISHDN SHDN Input Current SHDN =VIN or GND 1 μA IOUT Output Current 300 mA Output Voltage Accuracy 1mA≤IOUT≤300mA, ΔVDO Dropout Voltage I OUT=100mA 150 200 mV ILIMT Output Current Limit 330 450 700 mA t Startup Time Response RL=68Ω, COUT=1μF 40 μs VIL SHDN Input Low Voltage 0.4 V VIH SHDN Input High Voltage 0.6Vcc V Output Voltage TC 100 ppm/ TSHDN Thermal-Shutdown Temperature 160 ℃ ΔTSHDN Thermal-Shutdown Hysteresis 35 ℃ Line Regulation (VOUT＞4.0V) VOUT+0.3V≤VIN≤6.0V or VIN>2.5V IOUT=10mA 0.5 %/VLine Regulation (VOUT≤4.0V) 0.3 Load Regulation (VOUT＞4.0V) VIN=VOUT+1V or VIN>2.5V 1mA≤IOUT≤300mA 1.2 % Load Regulation (VOUT≤4.0V) 0.6 Output Voltage Noise 10Hz to 100kHz CIN=1μF, IOUT=10mA UM37512 170 μVRMSUM37533 250 UM37550 295 PSRR Power Supply Ripple Rejection (VOUT＞4.0V) VIN=VOUT+1V or VIN>2.5V IOUT=100mA F=100Hz 40 dB F=10KHz 30 Power Supply Ripple Rejection (VOUT≤4.0V) F=100Hz 60 F=10KHz 30 ESD Rating Human Body Mode 2 KV

http://www.union-ic.com Rev.05 Nov.2013 7 / 1 2 UM375xx Typical Performance Characteristics Outpout Voltage vs Output Current 3.25 3.26 3.27 3.28 3.29 3.30 3.31 3.32 3.33 3.34 0 50 100 150 200 250 300 Output Current(mA) Output Voltage(V) Output Voltage vs Input Voltage 3.280 3.285 3.290 3.295 3.300 3.305 3.310 3.315 3.320 3 . 544 . 555 . 56 Input Voltage(V) Output Voltage(V) UM37533，Iload=10mA UM37533, VIN=4.3V Dropout Voltage vs Output Current 100 150 200 250 300 350 0 25 50 75 100 125 150 175 200 225 250 275 300 Output Current(mA) Dropout Voltage(mV) UM37533 UM37518, Iout=0mA UM37518，Iout=100mA UM37518，VIN=2V

http://www.union-ic.com Rev.05 Nov.2013 8 / 1 2 UM375xx Typical Performance Characteristics (continued) Outpout Voltage vs Temperature 3.270 3.280 3.290 3.300 3.310 3.320 3.330 - 4 0 - 2 0 0 2 53 54 55 56 57 58 59 5 1 0 5 1 1 5 1 2 5 Temperature(℃) Outpout Voltage(V) Line Transient Response Load Transient Response UM37533, VIN=4.3V IOUT=10mA to 150mA VOUT=3.3V(100mV/div) VIN=4.3V, 100us/div Vin=4.0V to 5.0V VOUT=3.3V (50mV/div) Iload=150mA, 50us/div 10 100 1000 10000 100000 100 PSRR vs Frequency PSRR(dB) Frequency(Hz) UM37533, Iload=100mA

http://www.union-ic.com Rev.05 Nov.2013 9 / 1 2 UM375xx Pin Function IN (Pin 1): Power for UM375xx and Load Power is supp lied to the devices through the IN pin. The IN pin should be locally bypassed to ground if the UM375xx series are more than a few inches away from another source of bulk capacitan ce. In general, the output impedance of a battery rises with frequency, so it is usually a dvisable to include an input bypass capacitor in battery-powered circuits. A capacitor in the range of 0.1μF to 1μF is usually sufficient. GND (Pin 2) : Ground and Heat Sink. Solder to a ground plane or large pad to maximize heat dissipation. SHDN (Pin 3): Shutdown, Active Low. This pin is used to put the UM375xx into shutdown. The SHDN pin cannot be left floating and must be tied to the input pin if not used. NC (Pin 4): Not Connected. OUT (Pin 5): V oltage Regulated Output. The OUT pin supplies power to the load. A minimum output capacitor of 1 μF is required to ensure stability. Larger output capacitors may be required for applications with large transient loads to limit peak voltage transients. Typical Application Circuit

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Package Information

UM375xxS: SOT23-5 Outline Drawing DIMENSIONS Symbol MILLIMETERS INCHES Min Max Min Max A2 0.700 1.300 0.028 0.052 A1 0.000 0.100 0.000 0.004 b 0.300 0.550 0.012 0.022 c 0.100 0.200 0.004 0.008 D 2.700 3.100 0.108 0.124 E 1.400 1.800 0.056 0.072 E1 2.600 3.000 0.104 0.120 e 0.950REF 0.037REF e1 1.900REF 0.076REF L 0.300 0.600 0.012 0.024 θ 0° 8° 0° 8° Land Pattern NOTES: 1. Compound dimension: 2.90×1.60； 2. Unit: mm; 3. General tolerance ±0.05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation

http://www.union-ic.com Rev.05 Nov.2013 1 1 / 1 2 UM375xx UM375xxP: SOT353 Outline Drawing DIMENSIONS Symbol MILLIMETERS INCHES Min Max Min Max A 0.900 1.100 0.035 0.043 A1 0.000 0.100 0.000 0.004 A2 0.877 1.000 0.035 0.039 b 0.150 0.350 0.006 0.014 c 0.080 0.220 0.003 0.009 D 1.800 2.200 0.071 0.087 E 1.150 1.350 0.045 0.053 E1 2.000 2.450 0.079 0.096 e 0.650REF 0.026REF e1 1.200 1.400 0.047 0.055 L 0.488REF 0.020REF L1 0.260 0.460 0.010 0.018 θ 0° 8° 0° 8° Land Pattern NOTES: 1. Compound dimension: 2.10×1.25; 2. Unit: mm; 3.General tolerance ±0 .05mm unless otherwise specified; 4. The layout is just for reference. Tape and Reel Orientation

http://www.union-ic.com Rev.05 Nov.2013 1 2 / 1 2 UM375xx IMPORTANT NOTICE The information in this document has been ca refully reviewed and is believed to be accurate. Nonetheless, this document is subjec t 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 rese rves 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: 2F, No. 3, Lane 647 Songtao Road, Shanghai 201203 Tel: 021-51093966 Fax: 021-51026018 Website: www.union-ic.com