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| SSC2127 750mA CMOS Elektronische Bauelemente RoHS Compliant Product Positive Voltage Regulator Description The SSC2127 series positive,linear regulators feature low quiescent current (45A typ.) with low dropout voltage, making them ideal for battery applications. Output voltage are set at the factory and trimmed to 1.5% accuracy.These rugged devices have both Thermal Shutdown and Current Fold-back to prevent device failure under the "Worst" of operating conditions. An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation.The SSC2127 is stable with an output capacitance of 4.7F or greater. Features * Low Temperature Coefficient * Over-Temperature Shutdown REF. A B C D E F Min. Millimeter Max. 6.20 5.00 4.00 8 C 0.90 0.25 REF. M H L J K G Min. Millimeter Max. * Power Good Output Function * Very Low Dropout Voltage * Noise Reduction Bypass Capacitor * Short Circuit Current Fold-back * Guaranteed 750mA output * Current Limiting * Power-Saving Shutdown Mode 5.80 4.80 3.80 0C 0.40 0.19 0.10 0.25 0.35 0.49 1.35 1.75 0.375 REF. 45 C 1.27 TYP. Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets * Instrumentation Functional Block Diagram Typical Application Circuit SSC2127 http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 1 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator Absolute Maximum Ratings Parameter Input Voltage Output Current Output Voltage Operating Ambient Temperature Junction Temperature Max. Junction Temperature Power Dissipation ( EDS Classification o Symbol VIN IOUT VOUT Topr Tj Tj Max. PD Ratings 8 PD/(VIN-VO) 1.5~3.3 -40~+85 -40~+125 150 810 Unit V mA o o V C C T=100 C) o C mW o B Electrical Characteristics Ta=25 C unless otherwise noted (VIN=VOUT(T)+2V,VEN=VIN,CIN=1uF,COUT=4.7uF) Parameter Output Voltage Output Current Current Limit Load Regulation Dropout Voltage Quiescent Current Line Regulation Symbol VOUT (E) IO ILIM REGLOAD 1 Min. -1.5% 750 750 -1 _ _ _ _ Typ. VOUT (T) _ _ 2 Max. 1.5% _ _ Unit V mA mA Condition VIN=VOUT(T)+2V,1o=1mA VO>1.2V VO>1.2V 0.2 _ _ _ 1 1000 650 500 70 0.15 0.1 0.4 7 _ _ _ % mV uA % V o o VIN=VOUT(T)+2V,Io=1mA~ 750mA VOUT(T)=1.5V VOUT(T)=1.8V VOUT(T) 2.0V Io=750mA Vo=VOUT(E)-2% VDROPOUT IQ REGLINE VIN OTS OTH TC VOL PSRR 45 _ -0.15 -0.1 -0.4 Input Voltage Over Temperature Shutdown Over Temperature Hystersis Output Voltage Temperature Coefficient PG Voltage Low Power Supply Rejection Note _ _ _ _ _ _ _ 3 0.02 _ _ VIN=VOUT(T)+2V,Io=0mA Io=1mA VOUT(T)< 2.0V VIN=VOUT(T)+ 1 2.0V VOUT(T)<4.0V to VOUT(T)+2 4.0V VOUT(T) 150 30 30 _ C C o ppm/ C V dB ISINK=0.25mA f=1kHz f=10kHz f=100Hz uVrms V uA uA %VOUT(T) %VOUT(T) uA Io=100mA Co=4.7uF (ceramic) 0.4 _ _ _ _ 75 55 30 30 _ _ _ _ Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current Output Under Voltage Output Over Voltage PG Leakage Current certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+VDROPOUT http://www.SeCoSGmbH.com/ eN VEH VEL IEH IEL ISD VUV VOV ILC _ f=10Hz~100kHz, Io=10mA CO=4.7uF VIN=2.7V to 7V VEN=VIN,VIN=2.7V to 7V VEN=0V,VIN=2.7V to 7V VIN=5V,Vo=0V,VEN _ _ _ _ VIN 0 0.4 1 1 2 84 _ 0.5 _ _ _ PG goes low when VOUT too high PG goes low when VOUT too high VPG=7V 105 _ 1.0 Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when "VOUT (T) +2.0V" is provided at the VIN pin while maintaining a Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 2 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator Ordering Information(contd.) Part Number SSC2127-15 SSC2127-25 Marking 7B152 XXXX 7B252 XXXX Output Voltage 1.5V 2.5V Part Number SSC2127-18 SSC2127-33 Marking 7B182 XXXX 7B332 XXXX Output Voltage 1.8V 3.3V Detailed Description The SSC2127 of COMS regulators contain a PMOS pass transistor,voltage reference, error amplifier,over-current protection and thermal shutdown.The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits o become active when the junction temperature exceeds140 C, or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC.The SSC2127 behaves like a current source when the load reaches 2.2A. However, if the load impedance drops below 0.3 [ , the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds of 0.75 [ . External Capacitors The SSC2127 is stable with an output capacitance to ground of 4.7uF or greater. Ceramic capacitors have the lowest ESR, and will offer the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response. Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1uF ceramic capacitor with a 10uF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be at least 0.1uF to have a beneficial effect. All capacitors should be placed in closed proximity to the pins. A "Quiet" ground termination is desirable. This can be achieved with a "Star" connection. Enable When EN pin is pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 2uA. This pin behaves much like an electronic switch. 100K[ resistor is necessary between VEN source and EN pin when VEN is high than VIN. (Note: There is no internal pull-up for EN pin. It can not be floating.) Power Good The SSC2127 includes the Power Good feature. When the output in not within 15% of the specified voltage, it pulls low. This can occur under the following conditions: 1. Input voltage too low. 2. During over-temperature. 3. During over-current. 4. If output is pulled up. ( Note: PG pin is an open-drain output.) ht tp://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 3 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator Characteristics Curve http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 4 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 5 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator ht tp://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 6 of 6 |
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