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| EUP7968 300mA Low Dropout Linear Regulator DESCRIPTION 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 90A. Built-in output current-limiting and thermal-limiting provide maximal protection against any fault conditions. The EUP7968 is available in 1.2V,1.5V,1.8V,2.5V, 2.8V,3V,3.3V and 3.5V versions. FEATURE Very Low Dropout Voltage of 170mV at Output Current 300mA Guaranteed 300mA Output Current Low Ground Current at 90A 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 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 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) DESCRIPTION VIN GND VOUT 3 1 2 3 2 1 2 1 3 Input voltage of the LDO Common Ground Output voltage of the LDO DS7968 Ver1.3 Sep. 2007 2 EUP7968 Ordering Information Order Number EUP7968-12VIR1 EUP7968-15VIR1 EUP7968-18VIR1 EUP7968-25VIR1 EUP7968-28VIR1 EUP7968-30VIR1 EUP7968-33VIR1 EUP7968-35VIR1 EUP7968-15CAIR1 EUP7968-18CAIR1 EUP7968-25CAIR1 EUP7968-28CAIR1 EUP7968-30CAIR1 EUP7968-33CAIR1 EUP7968-35CAIR1 EUP7968-15CBIR1 EUP7968-18CBIR1 EUP7968-25CBIR1 EUP7968-28CBIR1 EUP7968-30CBIR1 EUP7968-33CBIR1 EUP7968-35CBIR1 Package Type SOT23-3 SOT23-3 SOT23-3 SOT23-3 SOT23-3 SOT23-3 SOT23-3 SOT23-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 SOT89-3 Marking IT I0 I1 I2 I6 I5 I3 IR 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 Operating Temperature range -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C -40C to 85C EUP7968 1/4 1/4 1/4 1/4 1/4 1/4 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 EUP7968 Absolute Maximum Ratings Input Voltage -----------------------------------------------------------------------------Operating Junction Temperature Range ----------------------------------------------Storage Temperature Range ------------------------------------------------------------Power Dissipation ,PD @ TA=25C SOT-23 --------------------------------------------------------------------------------------SOT-89 --------------------------------------------------------------------------------------Package Thermal Resistance SOT-23,c JA --------------------------------------------------------------------------------SOT-89,c JA ---------------------------------------------------------------------------------0.3V to 6V -40C to 125C -65C to 150C 0.15W 0.5W 250C/W 300C/W Electrical Characteristics Unless otherwise specified, all limits guaranteed for VIN= VO +0.5V, CIN=COUT=2.2F, TA =25C. Symbol VIN VO IO ILIMIT IQ VDO VO TSD Parameter Input Voltage Output Voltage Tolerance Maximum Output Current Output Current Limit Supply Current Dropout Voltage Line Regulation Load Regulation Thermal Shutdown Temperature Thermal Shutdown Hysteresis Conditions 100A IOUT 300mA VIN=VO+0.5V, Continuous TA = -40C to 85C IOUT=0mA IOUT =300mA IOUT = 1mA, (VO +0.5V) VI 5.5V 1mA IOUT 300mA EUP7968 Min Typ Max. 2.5 -3 300 350 720 90 170 0.05 15 160 20 0.2 35 200 5.5 +3 Unit V % of VOUT(NOM) mA mA A mV %/V mV C DS7968 Ver1.3 Sep. 2007 4 EUP7968 Typical Operating Characteristics o Output Voltage vs. Temperature( C) 3.020 Output Voltage VOUT(V) Output Voltage vs. Input voltage 3.06 3.04 3.02 3.00 2.98 2.96 25 C o 3.015 ILOAD=1mA 3.010 Output Voltage (V) -40 C o 125 C o 3.005 3.000 -60 -40 -20 0 20 40 60 o 80 100 120 140 2.94 3.5 4.0 4.5 5.0 5.5 6.0 Temperature( C) Input Voltage (V) Quiescent Current vs. Temperature 120 Quiescent Current (uA) Dropout Voltage vs. Output Current 240 220 200 180 160 140 120 100 80 60 40 20 0 -20 0 50 100 150 Dropout Voltage (mV) 110 100 90 80 70 60 50 -60 -40 -20 125 C o 25 C o -40 C o 0 20 40 60 o 80 100 120 140 200 250 300 Temperature ( C) Output Current (mA) DS7968 Ver1.3 Sep. 2007 5 EUP7968 DS7968 Ver1.3 Sep. 2007 6 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 1F 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 2.2F. Ceramic capacitors below 10F 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 0.5. 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 25C, 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 EUP7968 Packaging Information SOT23-3 SYMBOLS A A1 D E1 E L b e MILLIMETERS MIN. 0.00 2.90 1.60 2.60 0.30 0.30 0.95 3.00 0.60 0.50 0.102 0.012 0.012 MAX. 1.30 0.15 MIN. 0.000 INCHES MAX. 0.052 0.006 0.114 0.063 0.118 0.024 0.020 0.037 DS7968 Ver1.3 Sep. 2007 8 EUP7968 SOT89-3 SYMBOLS A L B1 B C D D1 H E e MILLIMETERS MIN. MAX. 1.40 0.89 0.36 0.44 0.35 4.40 1.35 3.94 2.29 1.50 1.60 1.20 0.48 0.56 0.44 4.60 1.83 4.25 2.60 INCHES MIN. 0.055 0.035 0.014 0.017 0.014 0.173 0.053 0.155 0.090 0.059 MAX. 0.063 0.047 0.019 0.022 0.017 0.181 0.072 0.167 0.102 DS7968 Ver1.3 Sep. 2007 9 |
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