EUP7914 150mA Low-Noise LDO in SC-82 Without A Bypass Capacitor DESCRIPTION FEATURES The EUP7914 is an efficient CMOS low dropout (LDO) voltage regulator optimized for ultra-low-noise applications. It offers high output accuracy, extremely low dropout voltage, low ground current and fast start-up time. The EUP7914 provides a very low noise output without a bypass capacitor, ideal for RF applications where a clean supply voltage source is required. Specifically designed for handheld and battery-powered devices, the EUP7914 provides a TTL-logic-compatible enable pin. When the EUP7914 is disabled, power consumption drops nearly to zero. Key features include current limit, thermal shutdown and faster transient response. The EUP7914 works with low-ESR ceramic capacitors. Available in the SC-82 space saving package which reduces the amount of board space for power applications. The EUP7914 offers wide fixed output voltage versions. z z z z z z z z z z z z 2.5V to 5.5V Input Voltage Range 30µV(rms) Output Noise 90mV Dropout @ 150mA 70dB PSRR at 1kHz No Bypass Capacitor Low 30µA Ground Current Guaranteed 150mA Output Current Stable with a 1µF Ceramic Output Capacitor when VOUT ≥ 1.5V, or 2.2µF when VOUT<1.5V Excellent Load/Line Transient Thermal Shutdown and Current Limit Protection Available 1.2V to 3.6V Fixed Output Voltages (50mV increments) Space-Saving 4-pin SC-82 Package RoHS Compliant and 100% Lead (Pb)-Free APPLICATIONS z z z z Block Diagram Figure 1. DS7914 Ver1.0 Nov. 2008 1 Cellular Phones Camera Modules PDA and Palmtop Computers Consumer/Personal Electronics EUP7914 Typical Application Circuit Figure 2. Fixed-Voltage LDO Regulator Pin Configurations Package Type Pin Configurations (Top View) SC-82 Pin Description NAME PIN EN 1 GND 2 The device enable input. Set logic high to enable the device, and connect logic low to disable the device. Ground pin OUT 3 Output voltage of the LDO IN 4 Input voltage of the LDO DS7914 Ver1.0 Nov. 2008 DESCRIPTION 2 EUP7914 Ordering Information Order Number Package Type Marking Operating Temperature Range EUP7914-12NIR1 SC-82 ET xx -40 °C to +85°C EUP7914-15NIR1 SC-82 EC xx -40 °C to +85°C EUP7914-18NIR1 SC-82 ED xx -40 °C to +85°C EUP7914-25NIR1 SC-82 EB xx -40 °C to +85°C EUP7914-28NIR1 SC-82 EE xx -40 °C to +85°C EUP7914-285NIR1 SC-82 EF xx -40 °C to +85°C EUP7914-30NIR1 SC-82 EG xx -40 °C to +85°C EUP7914-33NIR1 SC-82 EH xx -40 °C to +85°C EUP7914- □□□ □ □ □ □ Lead Free Code 1: Lead Free 0: Lead Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type N: SC-82 Output Voltage 12: 1.2V 15: 1.5V 18: 1.8V 25: 2.5V 28: 2.8V 285: 2.85V 30: 3.0V 33: 3.3V DS7914 Ver1.0 Nov. 2008 3 EUP7914 Absolute Maximum Ratings (1) IN,OUT and EN to GND-----------------------------------------------------------0.3V to 6V Junction Temperature ---------------------------------------------------------------------- 150°C Storage Temperature Range ---------------------------------------------------- -65°C to +150°C Lead Temperature -------------------------------------------------------------------------- 260°C Maximum Power Dissipation SC-82 ---------------------------------------------------0.3W Thermal Resistance θJA(SC-82) --------------------------------------------------------- 320°C/W ESD Rating Human Body Model --------------------------------------------------------------------- ±2kV Recommend Operating Conditions (2) VIN ------------------------------------------------------------------------------------- 2.5V to 5.5V VEN ------------------------------------------------------------------------------------ 0V to 5.5V Operating Temperature Range ------------------------------------------------ -40°C to +85°C Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device. Note (2): The device is not guaranteed to function outside the recommended operating conditions. Electrical Characteristics Conditions: VIN=VOUT+0.5V or 2.5V whichever is greater, VEN=VIN,CIN=COUT=1uF,TA= -40°C to +85℃ ,unless otherwise specified. Symbol Parameter Conditions Input Voltage ∆VOUT Output Voltage Accuracy IOUT=1mA to 30mA,TA=+25℃, IOUT=1mA to 30mA, TA=-40℃ to +85℃ IOUTMAX Maximum Output Current ILIMIT Current Limit VOUT=VOUT(nom) × 90% VOUT ≥ 3V, IOUT=150mA VDROP Dropout Voltage (3) 2.4 ≤ VOUT ≤ 3V, IOUT=150mA IQ Quiescent Current No Load VLNR Line Regulation VIN=(VOUT+0.5V) to 5.5V, IOUT=10mA VLDR Load Regulation 1mA ≤ IOUT ≤ 150mA ISHDN Shutdown Supply Current VEN=0,TA=+25℃ VIN=(VOUT+1V) f=1kHz, ILOAD=10mA Power Supply Ripple VIN=(VOUT+1V) f=10kHz, ILOAD=10mA PSRR Rejection VIN=(VOUT+1V) f=100kHz, ILOAD=10mA Output Noise Voltage f=10Hz~100kHz, VOUT=1.5V, No Load (RMS) Turn-on Time (4) RLOAD=50Ω,TA=+25℃ VENL VENL (EN logic low) VIN=2.5V to 5.5V VENH VENH (EN logic high) VIN=2.5V to 5.5V VEN Input Bias Current VIN=5.5V, VEN=0 or 5.5V RDIS Output Discharge Switch VEN=0,VIN=3.6V Thermal Shutdown TSD Temperature Thermal Shutdown ∆TSD Hysteresis EUP7914 Min Typ Max. 2.5 -2 5.5 2 V % -3 3 % 150 160 300 90 100 30 0.02 7 0.3 70 55 mA mA 135 150 50 0.15 15 1.5 Ver1.0 Nov. 2008 4 mV µA %/V mV µA dB 45 30 µV 100 500 µs V V µA Ω 155 ℃ 15 ℃ 0.4 1.5 -1 1 Note (3): Dropout is defined as VIN-VOUT when VOUT is 100mV below the value of VOUT for VIN=VOUT+0.5V Note (4): Time needed for VOUT to reach 90% of final value. DS7914 Unit EUP7914 Typical Characteristics (CIN=COUT=1µF) DS7914 Ver1.0 Nov. 2008 5 EUP7914 Typical Characteristics (continued) DS7914 Ver1.0 Nov. 2008 6 EUP7914 Typical Characteristics (continued) DS7914 Ver1.0 Nov. 2008 7 EUP7914 Application Note Input Capacitor An input capacitance of 1µF or higher is required between the EUP7914 input pin IN 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 EUP7914 is designed specifically to work with very small ceramic output capacitors. A ceramic capacitor (temperature characteristics X7R or X5R) in 1µF to 10µF range with 5mΩ to 500mΩ ESR range is suitable in the EUP7914 application circuit. The output capacitor must meet the requirement for minimum amount of capacitance to maintain good loop stability and phase margin. See the table below. Output Voltage Output Capacitor Minimum Value 1.2~1.45 2.2uF 1.5~3.6 1uF No-Load Stability The EUP7914 is stable without any external load. This is specially important for CMOS RAM keep-alive applications. On/Off Input Operation The EUP7914 is turned off by pulling the EN pin low, and turned on by pulling it high. If this pin is floating, the regulator will always be on .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. When EN is logic low, output is internally discharged to GND through a 500 resistor. DS7914 Ver1.0 Nov. 2008 8 EUP7914 Packaging Information SC-82 SYMBOLS A A1 b b1 D E E1 e L DS7914 Ver1.0 Nov. 2008 MILLIMETERS MIN. MAX. 0.80 1.10 0.00 0.10 0.25 0.40 0.35 0.50 2.00 1.80 2.40 1.25 1.30 0.21 0.46 9 INCHES MIN. 0.031 0.000 0.010 0.014 MAX. 0.044 0.004 0.016 0.020 0.079 0.071 0.094 0.049 0.051 0.008 0.018