SSC2127 750mA CMOS Positive Voltage Regulator Elektronische Bauelemente RoHS Compliant Product Description The SSC2127 series positive,linear regulators feature low quiescent current (45µA 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 4.7µF or greater. Features * Low Temperature Coefficient * Over-Temperature Shutdown * Power Good Output Function * Very Low Dropout Voltage * Noise Reduction Bypass Capacitor * Short Circuit Current Fold-back REF. A B C D E F Millimeter Min. Max. 5.80 4.80 3.80 0 0.40 0.19 6.20 5.00 4.00 8 0.90 0.25 REF. M H L J K G Millimeter Min. Max. 0.10 0.25 0.35 0.49 1.35 1.75 0.375 REF. 45 1.27 TYP. * Guaranteed 750mA output * Current Limiting * Power-Saving Shutdown Mode Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets * Instrumentation Functional Block Diagram Typical Application Circuit SSC2127 http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 1 of 6 SSC2127 750mA CMOS Elektronische Bauelemente Positive Voltage Regulator Absolute Maximum Ratings Parameter Ratings Symbol Unit Input Voltage VIN 8 V Output Current IOUT PD/(VIN-VO) mA Output Voltage VOUT 1.5~3.3 Operating Ambient Temperature Topr -40~+85 Tj Junction Temperature Max. Junction Temperature Power Dissipation ( o C mW B o Electrical Characteristics Ta=25 C unless otherwise noted (V Parameter Symbol 1 Min. 2 VOUT (T) VOUT (E) -1.5% IO 750 Current Limit ILIM 750 _ REGLOAD -1 0.2 VDROPOUT Quiescent Current IQ Over Temperature Shutdown _ 1 _ 500 _ 45 70 650 _ 0.15 0.02 0.1 _ Condition V VIN=VOUT(T)+2V,1o=1mA mA VO>1.2V mA VO>1.2V VOUT(T)=1.5V VOUT(T) ≥ 2.0V uA % _ 7 OTS _ o o 150 _ _ 30 _ C C OTH Output Voltage Temperature Coefficient TC _ 30 _ PG Voltage Low VOL _ _ 0.4 V dB Power Supply Rejection 75 _ 55 _ Output Voltage Noise EN Input Threshold PSRR _ 30 _ eN _ 30 _ VEH 2 _ VIN VEL 0 _ 0.4 Vo=VOUT(E)-2% V Over Temperature Hystersis _ Io=750mA 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) 0.4 Note _ VOUT(T)=1.8V mV VIN 3 VIN=VOUT(T)+2V,Io=1mA~ 750mA % 1000 _ -0.4 Input Voltage _ _ -0.1 Unit 1.5% _ -0.15 REGLINE _ _ _ Max. Typ. Output Voltage Load Regulation =VOUT(T)+2V,VEN=VIN,CIN=1uF,COUT=4.7uF) IN Output Current Line Regulation C o 810 PD EDS Classification Dropout Voltage C o -40~+125 150 Tj Max. T=100 C) V o o ppm/ C ISINK=0.25mA f=1kHz Io=100mA Co=4.7uF (ceramic) f=10kHz f=100Hz uVrms V f=10Hz~100kHz, Io=10mA CO=4.7uF VIN=2.7V to 7V IEH _ _ IEL _ _ 1 ISD _ 0.5 2 Output Under Voltage VUV _ uA _ 84 VOV 105 _ PG goes low when VOUT too high Output Over Voltage _ %VOUT(T) %VOUT(T) _ PG goes low when VOUT too high 1.0 uA EN Input Bias Current Shutdown Supply Current PG Leakage Current ILC _ 1 uA VEN=VIN,VIN=2.7V to 7V VEN=0V,VIN=2.7V to 7V VIN=5V,Vo=0V,VEN<VEL VPG=7V 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 certain IOUT value). 2: VOUT (T) =Specified Output Voltage 3: VIN (MIN) =VOUT+V DROPOUT http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 2 of 6 SSC2127 750mA CMOS Elektronische Bauelemente Positive Voltage Regulator Ordering Information(contd.) Part Number SSC2127-15 SSC2127-25 Marking 7B152 XXXX 7B252 XXXX Output Voltage Part Number 1.5V SSC2127-18 2.5V SSC2127-33 Marking Output Voltage 7B182 XXXX 7B332 XXXX 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 Ω , the current drops back to 600mA to prevent excessive power dissipation. Normal operation is restored when the load resistance exceeds of 0.75 Ω . 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. 100KΩ 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/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 6 SSC2127 Elektronische Bauelemente 750mA CMOS Positive Voltage Regulator Characteristics Curve http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 4 of 6 SSC2127 Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A 750mA CMOS Positive Voltage Regulator Any changing of specification will not be informed individual Page 5 of 6 SSC2127 Elektronische Bauelemente ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A 750mA CMOS Positive Voltage Regulator Any changing of specification will not be informed individual Page 6 of 6