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| SSC2146 600mA CMOS Elektronische Bauelemente RoHS Compliant Product Positive Voltage Regulator Description The SSC2146 series of positive,linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOP-8 package is attractive for "Pocket" and "Hand Held" applications. These rugged devices have both Thermal Shutdown and Current Fold-back to prevent device failure under the "Worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and ground.The SSC2146 is stable with an output capacitance of 2.2F or greater. Features * Low Temperature Coefficient * Over-Temperature Shutdown REF. A B C D E F * Factory Pre-set Output Fold-Back * Very Low Dropout Voltage * Noise Reduction Bypass Capacitor * Short Circuit Current Fold-back * Guaranteed 600mA output * Current Limiting * Highly Accurate 1.5% 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. 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 * Cordless Phones * Electronic Scales Functional Block Diagram Typical Application Circuit SSC2146 http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 1 of 5 SSC2146 Elektronische Bauelemente 600mA CMOS Positive Voltage Regulator Absolute Maximum Ratings Input Voltage Output Current Parameter Symbol VIN IOUT VOUT Ratings 8 PD/(VIN-VO) 1.5~3.8 -40~+85 -40~+125 150 123.7 810 B Unit V mA o Output Voltage Operating Ambient Temperature Junction Temperature Max. Junction Temperature Thermal Resistance o Power Dissipation ( T=100 C) EDS Classification Topr Tj Tj Max. ja PD V C o C o C o C /W mW Electrical Characteristics Ta=25 C unless otherwise noted Parameter Output Voltage Output Current Current Limit Load Regulation Dropout Voltage Quiescent Current Line Regulation o Symbol VOUT (E) 1 Min. -1.5% 600 600 _ Typ. VOUT (T) _ 2 Max. 1.5% _ _ Unit V mA mA Condition VIN=VOUT(T)+2V,1o=1mA VIN=VOUT(T)+2V,VO>1.2V VIN=VOUT(T)+2V,VO>1.2V IO ILIM REGLOAD VDROPOUT IQ REGLINE VIN OTS OTH TC ISC PSRR eN VEH VEL IEH IEL ISD 800 0.2 _ _ _ _ _ _ _ _ _ 1 1900 1400 800 600 50 0.2 0.15 0.1 7 _ _ _ % mV uA % V o o 1.3V VOUT(T) 1.4V Io=600mA 1.4V 30 _ _ -0.2 -0.15 -0.1 Note _ _ _ _ _ _ _ _ 3 0.02 _ Input Voltage Over Temperature Shutdown Over Temperature Hystersis Output Voltage Temperature Coefficient 4 Short Circuit Current Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current 150 30 30 300 75 55 30 30 _ _ _ _ C C o ppm/ C mA dB uVrms V uA uA VIN=VOUT(T)+1V,VOUT<0.8V Io=100mA f=1kHz Co=2.2uF f=10kHz (ceramic) f=100Hz CBYP=0.01uF f=10Hz~100kHz, Io=10mA CO=2.2uF,CBYP=0.01uF VIN=2.7V to 7V VEN=VIN,VIN=2.7V to 7V VEN=0V,VIN=2.7V to 7V VIN=5V,Vo=0V,VEN _ _ _ _ 2 _ _ _ VIN 0 0.4 0.1 0.5 0.1 0.5 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+VDROPOUT 4: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied. http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 2 of 5 SSC2146 Elektronische Bauelemente 600mA CMOS Positive Voltage Regulator Ordering Information(contd.) Part Number SSC2146-15 SSC2146-25 SSC2146-28 SSC2146-29 SSC2146-31 SSC2146-34 SSC2146-36 SSC2146-38 Marking 6D152 XXXX 6D252 XXXX 6D282 XXXX 6D292 XXXX 6D312 XXXX 6D342 XXXX 6D362 XXXX 6D382 XXXX Output Voltage 1.5V 2.5V 2.8V 2.9V 3.1V 3.4V 3.6V 3.8V Part Number SSC2146-18 SSC2146-27 SSC2146-2H SSC2146-30 SSC2146-33 SSC2146-35 SSC2146-37 Marking 6D182 XXXX 6D272 XXXX 6D2H2 XXXX 6D302 XXXX 6D332 XXXX 6D352 XXXX 6D372 XXXX Output Voltage 1.8V 2.7V 2.85V 3.0V 3.3V 3.5V 3.7V Detailed Description The SSC2146 series 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 become active when the junction temperature exceeds 150oC, or the current exceeds 600mA. During thermal shutdown , the output voltage remains low. Normal operation is restored when the junction temperature drops below 120oC. The SSC2146 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The SSC2146 also incorporates current fold-back to reduce power dissipation when the output is short circuited. The feature becomes active when the output drops below 0.8 V, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 V. External Capacitors The SSC2146 is stable with an output capacitance to ground of 2.2uF 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. A third capacitor can be connected between the BY-PASS pin and GND. This capacitor can be a low cost Polyester Film variety between the value of 0.001~0.01uF. A large capacitor improves the AC ripple rejection,but also makes the output come up slowly. This "Soft" turn-on is desirablein some applications to limit turn-on surges. All capacitors should be placed in close 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. ht tp://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 3 of 5 SSC2146 Elektronische Bauelemente 600mA 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 5 SSC2146 Elektronische Bauelemente 600mA 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 5 |
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