芯美电子 EUP7965 150mA Low-Noise Low-Dropout Linear Regulator DESCRIPTION FEATURES The EUP7965 is designed for portable and wireless applications with demanding performance and space requirements. The EUP7965 is stable with a small 1µF ±30% ceramic output capacitor. The EUP7965’s performance is optimized for battery powered systems to deliver low noise, low dropout voltage, low quiescent current and excellent line and load transient response. An optional external bypass capacitor reduces the output noise further without slowing down the load transient response. Power supply rejection is better than 65dB at low frequencies. High power supply rejection is maintained down to low input voltage levels common to battery operated circuits. Other features include a logic-controlled shutdown mode, short-circuit and thermal-shutdown protection. The EUP7965 is available in a SOT23-5,SOT23-6 package. z z z z z z z z z z z z z 2.5 to 5.5V Input Range 150mA Guaranteed Output 70dB PSRR at 1kHz @ VIN=VOUT+1V 50µVrms Output Noise (typ) over 10Hz to 100kHz 100mV Maximum Dropout with 150mA Load Low 85µA No-load Supply Current ≤ 1.5µA Shutdown Current Fast Start-up time. Stable with 1µF Ceramic Capacitors Thermal Shutdown and Short-circuit Protection Preset Output Voltage 1.5V, 1.8V, 2.5V, 2.8V, 2.85V, 3.0V ,3.3V, 4.8V ,5.0V and adjustable SOT23-5,SOT23-6 package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS z z z z Cellular and Cordless Handsets Bluetooth, Wireless LAN PDAs and Palmtop Computers Portable Information Appliances Block Diagram Figure 1. DS7965 Ver1.5 March. 2006 1 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Typical Application Circuit Figure 2. Figure 3. DS7965 Ver1.5 March. 2006 2 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Pin Configurations Part Number Pin Configurations EUP7965 SOT23-5 EUP7965 SOT23-6 Pin Description PIN SOT23-5 SOT23-6 VIN 1 1 Input voltage of the LDO GND 2 2 Common ground VEN 3 3 Enable input logic, enable high BYPASS 4 4 Optional bypass capacitor for noise reduction Output voltage set. Not externally connected for the fixed versions. Connect to resistor-divider for adjustable output voltage. Output voltage of the LDO SET VOUT 5 5 DS7965 Ver1.5 March. 2006 6 DESCRIPTION 3 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Ordering Information Order Number Package Type Marking Operating Temperature range EUP7965-15VIR1 SOT23-5 G0 □ □ -40 °C to 85°C EUP7965-18VIR1 SOT23-5 G1 □ □ -40 °C to 85°C EUP7965-25VIR1 SOT23-5 G2 □ □ -40 °C to 85°C EUP7965-28VIR1 SOT23-5 G6 □ □ -40 °C to 85°C EUP7965-285VIR1 SOT23-5 G8 □ □ -40 °C to 85°C EUP7965-30VIR1 SOT23-5 G5 □ □ -40 °C to 85°C EUP7965-33VIR1 SOT23-5 G3 □ □ -40 °C to 85°C EUP7965-48VIR1 SOT23-5 G7 □ □ -40 °C to 85°C EUP7965-50VIR1 SOT23-5 G4 □ □ -40 °C to 85°C EUP7965VIR1 SOT23-6 GA □ □ -40 °C to 85°C EUP7965-□ □ □ □ □ □ □ Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type V: SOT-23 Output Voltage 15: 1.5V 18: 1.8V 25: 2.5V 28: 2.8V 285: 2.85V 30: 3.0V 33: 3.3V 48: 4.8V 50: 5.0V Blank: Adjustable DS7965 Ver1.5 March. 2006 4 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Absolute Maximum Ratings VIN,VEN ------------------------------------------------------------------------------- -0.3 to 6V VOUT ----------------------------------------------------------------- -0.3 to (VIN+0.3) ≤ 6V Junction Temperature ------------------------------------------------------------------- 150°C Storage Temperature ------------------------------------------------------ -65°C to +150°C Lead Temp -----------------------------------------------------------------------------235°C Pad Temp ------------------------------------------------------------------------------235°C Maximum Power Dissipation SOT23-5 --------------------------------------------- 364mW Thermal Resistance θJA(SOT23-5) --------------------------------------------------- 220°C/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 ------------------------------------------------------ -40°C to +125°C Electrical Characteristics Unless otherwise specified, all limits guaranteed for VIN= VOUT(nom) +0.5V, CIN=1µF, IOUT=1mA, COUT=1µF, CBYPASS=0.01µF. Typical values and limits appearing in standard typeface are for TJ= 25°C. Symbol ΔVOUT PSRR IQ Parameter Conditions EUP7965 Min Typ Max. Output Voltage Tolerance IOUT = 1mA Line Regulation Error VIN = (VOUT(nom)+0.5V) to 5.5V, For 4.8 to 5.0 options For all other options Load Regulation Error IOUT = 1mA to 150mA Power Supply Rejection Ratio VIN=VOUT(nom)+1V, f = 1kHz, IOUT=50mA*6 VEN=1.4V, IOUT = 0mA For 4.8 to 5.0 options For all other options VEN = 1.4V, IOUT = 0 to 150mA For 4.8 to 5.0 options For all other options VEN = 0.4V 100 85 165 150 155 140 0.06 250 200 1.5 IOUT = 1mA 0.5 2 IOUT = 50mA 25 35 IOUT = 100mA 50 70 IOUT = 150mA 75 100 Quiescent Current Dropout Voltage DS7965 Ver1.5 March. 2006 Unit % of VOUT(nom) -2 2 -0.19 -0.1 0.19 0.1 %/V 0.005 %mA 0.0025 70 dB 5 联系电话：１５９９９６４４５７９ ８３１５１７１５ µA mV 芯美电子 EUP7965 Electrical Characteristics Unless otherwise specified, all limits guaranteed for VIN= VOUT(nom) +0.5V, CIN=1µF, IOUT=1mA, COUT=1µF, CBYPASS=0.01µF. Typical values and limits appearing in standard typeface are for TJ= 25°C. Symbol Parameter Conditions Min EUP7965 Typ Max. Unit ISC Short Circuit Current Limit Output Grounded (Steady State) 600 mA TON Turn-On Time CBYPASS = 0.01µF 150 µs Output Noise Voltage BW = 10Hz to 100kHz, COUT = 1µF 50 µVrms VEN = 0.4 and VIN = 5.5 ±1 nA en IEN VIL VIH TSD Maximum Input Current at EN Maximum Low Level Input Voltage at EN Minimum High Level Input Voltage at EN Thermal Shutdown Temperature Thermal Shutdown Hysteresis DS7965 Ver1.5 March. 2006 VIN = 2.5 to 5.5V VIN = 2.5 to 5.5V 0.4 1.4 V V 160 °C 20 °C 6 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Typical Operating Characteristics Unless otherwise specified, CIN=CCOUT=1µF Ceramic, CBYPASS=10nF, VIN=VOUT+0.2V, TA=25°C, Enable pin is tied to VIN. DS7965 Ver1.5 March. 2006 7 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 DS7965 Ver1.5 March. 2006 EUP7965 8 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 DS7965 Ver1.5 March. 2006 EUP7965 9 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 DS7965 Ver1.5 March. 2006 EUP7965 10 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 DS7965 Ver1.5 March. 2006 EUP7965 11 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Application Note External Capacitors Like any low-dropout regulator, the EUP7965 requires external capacitors for regulator stability. The EUP7965 is specifically designed for portable applications requiring minimum board space and smallest components. These capacitors must be correctly selected for good performance. Input Capacitor An input capacitance of ≈ 1µF is required between the EUP7965 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. There are no requirements for the ESR on the input capacitor, but tolerance and temperature coefficient must be considered when selecting the capacitor to ensure the capacitance will be ≈ 1µF over the entire operating temperature range. Output Capacitor The EUP7965 is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor (temperature characteristics X7R, X5R, Z5U, or Y5V) in 1 to 22µF range with 5mΩ to 500mΩ ESR range is suitable in the EUP7965 application circuit. The output capacitor must meet the requirement for minimum amount of capacitance and also have an ESR (Equivalent Series Resistance) value which is within a stable range (5mΩ to 500mΩ) No-Load Stability The EUP7965 will remain stable and in regulation with no external load. This is specially important in CMOS RAM keep-alive applications. Capacitor Characteristics The EUP7965 is designed to work with ceramic capacitors on the output to take advantage of the benefits they offer: for capacitance values in the range of 1µF to 4.7µF range, ceramic capacitors are the smallest, least expensive and have the lowest ESR values (which makes them best for eliminating high frequency noise). The ESR of a typical 1µF ceramic capacitor is in the range of 20mΩ to 40mΩ, which easily meets the ESR requirement for stability by the EUP7965. The ceramic capacitor’s capacitance can vary with temperature. The capacitor type X7R, which operates over a temperature range of -55°C to +125°C, will only vary the capacitance to within ±15%. Most large value ceramic capacitors ( ≈ 2.2µF) are manufactured with Z5U or Y5V temperature characteristics. Their capacitance can drop by more than 50% as the temperature goes from 25°C to 85°C. Therefore, X7R is recommended over Z5U and Y5V in applications where the ambient temperature will change significantly above or below 25°C. Noise Bypass Capacitor Connecting a 0.01µF capacitor between the CBYPASS pin and ground significantly reduces noise on the regulator output. 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. On/Off Input Operation The EUP7965 is turned off by pulling the VEN pin low, and turned on by pulling it high. If this feature is not used, the VEN pin should be tied to VIN to keep the regulator output on at all time. To assure proper operation, the signal source used to drive the VEN input must be able to swing above and below the specified turn-on/off voltage thresholds listed in the Electrical Characteristics section under VIL and VIH. Fast Start up The EUP7965 output starts up after Vref voltage reaches its final value (1.23V nomial). The start-up time is determined by the time constant of the bypass capacitor. The smaller the capacitor value., the shorter the start-up time, but less noise gets reduced. As a result, start-up time and noise reduction need to be taken into design consideration when choosing the value of the bypass capacitor. DS7965 Ver1.5 March. 2006 12 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Adjustable Operation The adjustable version of the EUP7965 has an output voltage range of 1.25V to 5V. The output voltage of the EUP7965 adjustable regulator is programmed using an external resistor divider as shown in Figure3. The output voltage is calculated using: VO = Vref × (1 + R1 ) R2 Where: Vref=1.23V typ. (the internal reference voltage) Utilize the following equation for adjusting the output to a particular voltage: V PI = R O − 1 2 1.23V Choose R2=100k to optimize accuracy, power supply rejection, noise and power consumption. In order to improve the stability of the adjustable version, it is suggested that a small compensation capacitor C1 be placed between VOUT and SET . DS7965 Ver1.5 March. 2006 13 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 Packaging Information SOT23-5 Note: 1. Package body sizes exclude mold flash protrusions or gate burrs. 2. Tolerance ± 0.1000mm (4 mil) unless otherwise specified. 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane. Symbols A A1 A2 b C D E e H L θ1 DS7965 Ver1.5 March. 2006 Min. 1.00 0.00 0.70 0.35 0.12 2.70 1.50 ----2.6 0.37 14 Dimension in Millimeters Nom 1.10 ----0.80 0.40 0.15 2.90 1.60 1.90(Typ.) 2.8 ----5 Max. 1.30 0.10 0.90 0.50 0.20 3.10 1.70 ----3.00 ----9 14 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 EUP7965 SOT23-6 SYMBOLS A A1 A2 b C D E E1 e E1 L L1 L2 R R1 θ θ1 DS7965 Ver1.5 March. 2006 DIMENSIONS IN MILLIMETERS MIN. NOM. --------------------0.90 1.15 0.30 -----0.08 -----2.90 BSC 2.80 BSC 1.60 BSC 0.95 BSC 1.90 BSC 0.30 0.45 0.60 REF 0.25 BSC 0.10 -----0.10 -----0° 4° 5° 10° MAX. 1.45 0.15 1.30 0.50 0.22 0.60 -----0.25 8° 15° 15 联系电话：１５９９９６４４５７９ ８３１５１７１５