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| EUP7967A 300mA Low-Noise Low-Dropout Linear Regulator DESCRIPTION The EUP7967A low-noise, low-dropout, linear regulator operates from a 2.5V to 5.5V input and is guaranteed to deliver 300mA. The EUP7967A is stable with small 2.2F ceramic capacitor. Its performance suits battery powered applications because of its shutdown mode, low quiescent current, and very low dropout voltage. The low dropout voltage allows for more utilization of a battery's available energy by operating closer to its end-of-life voltage. The EUP7967A is available in 1.5V,1.8V,2.5V, 2.8V, 3V ,3.3V and Adjustable versions. FEATURE 300mA Guaranteed Output Current 65dB PSRR at 1kHz Low Noise Output 150mV Dropout at 300mA Load Low 84A No-Load Supply Current 1A Shutdown Current Stable With 2.2F Ceramic Output Capacitors Thermal Shutdown and Short-Circuit Protection SOT23-5 Package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS Wireless Handsets DSP Core Power Battery Powered Electronics Portable Information Appliance Block Diagram Figure1. DS7967A Ver 1.4 Sep. 2007 1 EUP7967A Typical Application Circuit Figure2. Fixed-Voltage LDO Regulator Pin Configurations Package Type Pin Configurations SOT23-5 Fixed-Voltage Adjustable Voltage Pin Description PIN NAME DESCRIPTION 1 2 3 VIN GND Input voltage of the LDO Common Ground SHDN BP ADJ VOUT SHDN places the entire device in shutdown mode when held low Compensation capacitor for noise reduction Adjustable regulator feedback input. Connect to resistor divider. Output voltage of the LDO 4 5 DS7967A Ver 1.4 Sep. 2007 2 EUP7967A Ordering Information Order Number EUP7967A-12VIR1 EUP7967A-15VIR1 EUP7967A-18VIR1 EUP7967A-25VIR1 EUP7967A-28VIR1 EUP7967A-30VIR1 EUP7967A-33VIR1 EUP7967AVIR1 Package Type SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 SOT23-5 Marking hT 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 1/4 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 h0 1/4 h1 1/4 h2 1/4 h6 1/4 h5 1/4 h3 1/4 hA 1/4 EUP7967A 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 Output Voltage 12: 1.2V 15: 1.5V 18: 1.8V 25: 2.5V 28: 2.8V 30: 3.0V 33: 3.3V Black: Adjustable DS7967A Ver 1.4 Sep. 2007 3 EUP7967A Absolute Maximum Ratings VIN,VEN --------------------------------------------------------------------------------- -0.3 to 6V VOUT ------------------------------------------------------------------- -0.3 to (VIN+0.3) 6V Junction Temperature ------------------------------------------------------------------- 150C Storage Temperature ------------------------------------------------------ -65C to +150C Lead Temp -----------------------------------------------------------------------------235C Pad Temp ------------------------------------------------------------------------------235C Maximum Power Dissipation SOT23-5 -------------------------------------------- 364mW Thermal Resistance JA(SOT23-5) ------------------------------------------------- 220C/W ESD Rating Human Body Model ------------------------------------------------------------------- 2kV Operating Ratings VIN -------------------------------------------------------------------------------------- 2.5 to 5.5V VEN ------------------------------------------------------------------------- 0 to (VIN+0.3) 5.5V Junction Temperature -------------------------------------------------------- -40C to +125C Electrical Characteristics Unless otherwise specified, all limits guaranteed for VIN= VO +0.5V, VSHDN=VIN, CIN=COUT=2.2F, CBP=10nF, TA =25C. Symbol VO IO ILIMIT IQ VDO VO en VSHDN ISHDN Parameter Output Voltage Tolerance Maximum Output Current Output Current Limit Supply Current Shutdown Supply Current Dropout Voltage Line Regulation Load Regulation Output Voltage Noise SHDN Input Threshold SHDN Input Bias Current FB Input Bias Current (ADJ Version) FB Pin Voltage (ADJ Version) Conditions 100A IOUT 300mA VIN=VO+0.5V, Continuous TA = -40C to 85C IOUT=0mA VO =0V, SHDN =GND IOUT =300mA IOUT = 1mA, (VO +0.5V) VI 5.5V 1mA IOUT 300mA IOUT =10mA, 10Hz f 100kHz VIH,(VO+0.5V) VI 5.5V VIL,(VO+0.5V) VI 5.5V SHDN =GND or IN Min -3 300 350 EUP7967A Typ Max. +3 720 84 150 0.05 15 50 Unit % of VOUT(NOM) mA mA A A mV %/V mV VRMS 140 1 200 0.2 35 1.6 0.4 0.1 1 1.176 1.2 160 20 1.224 100 V nA nA V C dB VIN=5.5V, VFB=1.3V TA=25J VFB TSD PSRR Thermal Shutdown Temperature Thermal Shutdown Hysteresis Power Supply Rejection Ratio VIN=VOUT+1V, f=1kHZ 65 DS7967A Ver 1.4 Sep. 2007 4 EUP7967A Typical Operating Characteristics Output Voltage vs. Temperature( C) 3.020 Output Voltage VOUT(V) o 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) DS7967A Ver 1.4 Sep. 2007 5 EUP7967A DS7967A Ver 1.4 Sep. 2007 6 EUP7967A Application Information External Capacitors Like any low-dropout regulator, the EUP7967A requires external capacitors for regulator stability. The EUP7967A is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance. Input Capacitor Noise Bypass Capacitor An external 10nF bypass capacitor at BP pin conjunction with an internal resistor creates lowpass filter. Increasing the capacitance will decrease the output noise. This cap is connected directly to a high impedance node in the bandgap reference circuit. Any significant loading on this node will cause a change on the regulated output voltage. For this reason, DC leakage current through this pin must be kept as low as possible for best output voltage accuracy. The types of capacitors best suited for the noise bypass capacitor are ceramic and film. Unlike many other LDO's , addition of a noise reduction capacitor does not effect the load transient response of the device. However, it does affect start-up time. The smaller the capacitance value, the quicker the start-up time. Power Dissipation and Junction Temperature A minimum input capacitance of 1F is required between the EUP7967A 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. No-Load Stability The EUP7967A will remain stable and in regulation with no external load. This is specially important in CMOS RAM keep-alive applications. Output Capacitance The EUP7967A 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 EUP7967A 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. Specified regulator operation is assured to a junction temperature of 125C; the maximum junction temperature should be restricted to 125C under normal operating conditions. This restriction limits the power dissipation the regulator can handle in any given application. To ensure the junction temperature is within acceptable limits, calculate the maximum allowable dissipation, PD(max), and the actual dissipation, PD, which must be less than or equal to PD(max) The maximum-power-dissipation limit is determined using the following equation: P T max - T A =J D(max) R JA Where: TJMAX is the maximum allowable junction temperature. RJA is the thermal resistance junction-to-ambient for the package TA is the ambient temperature. The regulator dissipation is calculated using: PD = VI - VO x I O ( ) Power dissipation resulting from quiescent current is negligible. Excessive power dissipation triggers the thermal protection circuit. Shutdown The EUP7967A goes into sleep mode when the SHDN pin is in a logic low condition. During this condition, the pass transistor, error amplifier, and bandgap are turned off, reducing the supply current to 60nA typical. The SHDN pin may be directly tied to VIN to keep the part on. DS7967A Ver 1.4 Sep. 2007 7 EUP7967A Adjustable Operation The adjustable version of the EUP7967A has an output voltage range of 1.2V to 4.5V. The output voltage of the EUP7967A adjustable regulator is programmed using an external resistor divider as shown in Figure3. The output voltage is calculated using: V =V O ref x (1 + R1 R 2 ) Where: Vref= 1.2V typ. (the internal reference voltage) Utilize the following equation for adjusting the output to a particular voltage: V R = R 2 O - 1 1 1.2V Choose R2=50k to optimize accuracy, power supply rejection, noise and power consumption. Figure3. Adjustable Regulator with Resistors DS7967A Ver 1.4 Sep. 2007 8 EUP7967A Packaging Information SOT23-5 SYMBOLS A A1 D E1 E L b e MILLIMETERS MIN. MAX. 1.30 0.00 0.15 2.90 1.60 2.60 3.00 0.30 0.60 0.30 0.50 0.95 INCHES MIN. 0.000 0.114 0.063 0.102 0.012 0.012 0.037 0.118 0.024 0.020 MAX. 0.052 0.006 DS7967A Ver 1.4 Sep. 2007 9 |
Price & Availability of EUP7967A-15VIR1
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