芯美电子 EUP7968 300mA Low Dropout Linear Regulator FEATURE DESCRIPTION z The EUP7968 is a 300mA fixed output voltage low dropout linear regulator operating from 2.5V to 5.5V input. Typical ground current is approximately 90µA. Built-in output current-limiting and thermal-limiting provide maximal protection against any fault conditions. z z z z z z z The EUP7968 is available in 1.2V,1.5V,1.8V,2.5V, 2.8V,3V,3.3V and 3.5V versions. Very Low Dropout Voltage of 170mV at Output Current 300mA Guaranteed 300mA Output Current Low Ground Current at 90µA Stable with low ESR Ceramic Capacitors Fast Transient Response Current-limiting and Thermal Protection SOT23-3 and SOT89 Package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS z z z Voltage Regulator for LAN Card, CD-ROM, and DVD Wireless Communication Systems Battery Powered Systems Block Diagram Figure 1. DS7968 Ver1.3 Sep. 2007 1 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 Typical Application Circuit Figure2. Fixed-Voltage LDO Regulator Figure 2. Pin Configurations Package Type Pin Configurations SOT23-3 (A) (B) SOT89-3 Pin Description PIN SOT23-3 SOT89-3(A) SOT89-3(B) VIN 3 3 2 Input voltage of the LDO GND 1 2 1 Common Ground VOUT 2 1 3 Output voltage of the LDO DS7968 Ver1.3 Sep. 2007 DESCRIPTION 2 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 Ordering Information Order Number Package Type Marking Operating Temperature range EUP7968-12VIR1 SOT23-3 IT □ □ □ □ -40°C to 85°C EUP7968-15VIR1 SOT23-3 I0 □ □ □ □ -40°C to 85°C EUP7968-18VIR1 SOT23-3 I1 □ □ □ □ -40°C to 85°C EUP7968-25VIR1 SOT23-3 I2 □ □ □ □ -40°C to 85°C EUP7968-28VIR1 SOT23-3 I6 □ □ □ □ -40°C to 85°C EUP7968-30VIR1 SOT23-3 I5 □ □ □ □ -40°C to 85°C EUP7968-33VIR1 SOT23-3 I3 □ □ □ □ -40°C to 85°C EUP7968-35VIR1 SOT23-3 IR □ □ □ □ -40°C to 85°C EUP7968-15CAIR1 SOT89-3 EUP7968-18CAIR1 SOT89-3 EUP7968-25CAIR1 SOT89-3 EUP7968-28CAIR1 SOT89-3 EUP7968-30CAIR1 SOT89-3 EUP7968-33CAIR1 SOT89-3 EUP7968-35CAIR1 SOT89-3 EUP7968-15CBIR1 SOT89-3 EUP7968-18CBIR1 SOT89-3 EUP7968-25CBIR1 SOT89-3 EUP7968-28CBIR1 SOT89-3 EUP7968-30CBIR1 SOT89-3 EUP7968-33CBIR1 SOT89-3 EUP7968-35CBIR1 SOT89-3 xxxxx 68CA xxxxx 68DA xxxxx 68BA xxxxx 68EA xxxxx 68GA xxxxx 68HA xxxxx 68RA xxxxx 68CB xxxxx 68DB xxxxx 68BB xxxxx 68EB xxxxx 68GB xxxxx 68HB xxxxx 68RB -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C EUP7968 □ □ □ □ □ □ Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard C: Commercial Package Type V: SOT23 CA: SOT89-3 (A) CB: SOT89-3 (B) Output Voltage 12: 1.2V 25:2.5V 15: 1.5V 28: 2.8V 18: 1.8V 30: 3.0V DS7968 Ver1.3 Sep. 2007 33:3.3V 35:3.5V 3 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 Absolute Maximum Ratings Input Voltage ------------------------------------------------------------------------------ -0.3V to 6V Operating Junction Temperature Range ----------------------------------------------Storage Temperature Range ------------------------------------------------------------Power Dissipation ,PD @ TA=25°C SOT-23 --------------------------------------------------------------------------------------SOT-89 --------------------------------------------------------------------------------------Package Thermal Resistance SOT-23,θJA --------------------------------------------------------------------------------SOT-89,θJA --------------------------------------------------------------------------------- -40°C to 125°C -65°C to 150°C 0.15W 0.5W 250°C/W 300°C/W Electrical Characteristics Unless otherwise specified, all limits guaranteed for VIN= VO +0.5V, CIN=COUT=2.2µF, TA =25°C. Symbol Parameter VIN Input Voltage ∆ VO Output Voltage Tolerance IO Maximum Output Current ILIMIT Conditions 100µA ≤ IOUT ≤ 300mA VIN=VO+0.5V, Continuous EUP7968 Min Typ Max. 2.5 5.5 -3 +3 300 Output Current Limit TA = -40°C to 85°C IQ Supply Current IOUT=0mA 90 VDO Dropout Voltage IOUT =300mA IOUT = 1mA, (VO +0.5V) ≤ VI ≤ 5.5V 1mA ≤ IOUT ≤ 300mA 170 ∆ VO Line Regulation Load Regulation TSD 350 720 VOUT(NOM) mA mA 200 µA mV 0.2 %/V 15 35 mV 160 Thermal Shutdown Hysteresis 20 Sep. 2007 V % of 0.05 Thermal Shutdown Temperature DS7968 Ver1.3 Unit 4 联系电话：１５９９９６４４５７９ ８３１５１７１５ °C 芯美电子 EUP7968 Typical Operating Characteristics Output Voltage vs. Input voltage o Output Voltage vs. Temperature( C) 3.06 Output Voltage (V) Output Voltage VOUT(V) 3.020 3.015 ILOAD=1mA 3.010 3.04 o 25 C 3.02 3.00 o o -40 C 125 C 2.98 3.005 2.96 3.000 -60 -40 -20 0 20 40 60 2.94 3.5 80 100 120 140 4.0 o Quiescent Current vs. Temperature Dropout Voltage (mV) Quiescent Current (uA) 110 100 90 80 70 60 0 20 40 60 80 100 120 140 Temperature ( C) Sep. 2007 240 220 200 180 160 140 120 100 80 60 40 20 0 -20 5.5 6.0 o 125 C o 25 C o -40 C 0 o DS7968 Ver1.3 5.0 Dropout Voltage vs. Output Current 120 50 -60 -40 -20 4.5 Input Voltage (V) Temperature( C) 50 100 150 200 250 Output Current (mA) 5 联系电话：１５９９９６４４５７９ ８３１５１７１５ 300 芯美电子 DS7968 Ver1.3 Sep. 2007 EUP7968 6 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 Application Information External Capacitors Like any low-dropout regulator, the EUP7968 requires external capacitors for regulator stability. The EUP7968 is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance. Input Capacitor A minimum input capacitance of 1µF is required between the EUP7968 input pin and ground (the amount of the capacitance may be increased without limit).This capacitor must be located a distance of not more than 1cm from the input pin and returned to a clean analog ground. Any good quality ceramic, tantalum, or film capacitor may be used at the input. If a tantalum capacitor is used at the input, it must be guaranteed by the manufacturer to have a surge current rating sufficient for the application. Output Capacitance The EUP7968 is specifically designed to employ ceramic output capacitors as low as 2.2µF. Ceramic capacitors below 10µF offer significant cost and space savings, along with high frequency noise filtering. Higher values and other types and of capacitor may be used, but their equivalent series resistance (ESR) should be maintained below 0.5Ω. Ceramic capacitor of the value required by the EUP7968 are available in the following dielectric types: Z5U, Y5V, X5R, and X7R. The Z5U and Y5V types exhibit a 50% or more drop in capacitance value as their temperature increase from 25°C, an important consideration. The X5R generally maintain their capacitance value within ± 20%. The X7R type are desirable for their tighter tolerance of 10% over temperature. DS7968 Ver1.3 Sep. 2007 7 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 Packaging Information SOT23-3 SYMBOLS INCHES MIN. MAX. MIN. MAX. A - 1.30 - 0.052 A1 0.00 0.15 0.000 0.006 D 2.90 0.114 E1 1.60 0.063 E 2.60 3.00 0.102 0.118 L 0.30 0.60 0.012 0.024 b 0.30 0.50 0.012 0.020 e DS7968 Ver1.3 MILLIMETERS Sep. 2007 0.95 0.037 8 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7968 SOT89-3 MILLIMETERS MIN. MAX. INCHES MIN. MAX. A 1.40 1.60 0.055 0.063 L 0.89 1.20 0.035 0.047 B1 0.36 0.48 0.014 0.019 B 0.44 0.56 0.017 0.022 C 0.35 0.44 0.014 0.017 D 4.40 4.60 0.173 0.181 D1 1.35 1.83 0.053 0.072 H 3.94 4.25 0.155 0.167 E 2.29 2.60 0.090 0.102 SYMBOLS e DS7968 Ver1.3 Sep. 2007 1.50 0.059 9 联系电话：１５９９９６４４５７９ ８３１５１７１５