SSC2129 CMOS Low Dropout Elektronische Bauelemente Voltage Regulator RoHS Compliant Product Description The SSC2129 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. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground.The SSC2129 is stable with an output capacitance of 4.7µF or greater. Features * Low Temperature Coefficient * Over-Temperature Shutdown * Highly Accurate ± 1.5% * Very Low Dropout Voltage * Noise Reduction Bypass Capacitor * Guaranteed 1.55A Output 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. * Current Limiting * Power-Saving Shutdown Mode Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets * Instrumentation Functional Block Diagram Typical Application Circuit SSC2129 http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 1 of 6 SSC2129 CMOS Low Dropout Elektronische Bauelemente Voltage Regulator Absolute Maximum Ratings Parameter Ratings Symbol Unit Input Voltage VIN 8 Output Current IOUT PD/(VIN-VO) A Output Voltage VOUT Topr 1.5~5.0 V Operating Ambient Temperature Tj Junction Temperature Thermal Resistance Power Dissipation ( o T=100 C)* PD 2.5 B o Output Voltage 1 VOUT (E) Min. -1.5% Typ. 2 VOUT (T) Output Current IO 1.55 _ Current Limit ILIM 1.55 2 REGLOAD -1 0.2 Load Regulation Dropout Voltage Ground Pin Cruuent Line Regulation IO=1mA~1.5A IGND TC Note3 _ _ PSRR 0.02 0.1 _ 150 30 _ 50 20 15 75 55 30 _ _ _ _ 30 VEH 2 _ VEL 0 eN IEH IEL ISD _ _ _ _ _ _ _ _ 0.15 30 _ 800 _ _ _ Shutdown Supply Current % 1 1000 70 OTH EN Input Bias Current VOUT >1.2V VOUT >1.2V 45 Over Temperature Hystersis Output Voltage Temperature Coefficient EN Input Threshold A _ OTS Output Voltage Noise A _ _ Over Temperature Shutdown Power Supply Rejection IO=1mA IQ VIN 30 0.5 =VOUT(T)+2V,VEN=VIN ) V _ 600 _ W 1.5% _ _ IN C C /W Condition _ 45 o o Unit _ REGLIN E Input Voltage _ C C Max. _ VDROPOUT Quiescent Current _ -40~+125 20** Electrical Characteristics Ta=25 C unless otherwise noted (V Symbol o o θjc EDS Classification *Assuming a heat sink capable of twice times (θjc) **Estimated Parameter -40~+85 150 Tj Max. Max. Junction Temperature V 7 mV 2.8V< VOUT(T) uA V _ o C C o ppm/ C _ f=1kHz f=10kHz _ _ _ dB _ _ _ VIN 0.4 0.1 0.5 uVrms V uA _ 2 Vo=VOUT(E)-2% IO=1mA~1.5A Io=1mA VOUT(T)< 2.0V VIN=VOUT(T)+ 1 2.0V ≤ VOUT(T) to VOUT(T)+2 % o IO=1.55A Io=0mA uA _ _ 1.5V< VOUT(T)≤ 2.0V 2.0V< VOUT(T)≤ 2.8V uA Io=100mA Co=4.7uF ( c e r a m ic ) f=100kHz f=1kHz Io=100mA Co=4.7uF( ce ra mi c ) f=10kHz CBYP=0.01uF f=100kHz f=10Hz~100kHz CBYP=0uF Io=10mA CBYP=0.01uF CO=4.7uF VIN=2.7V~7V VEN=VIN,VIN=2.7V~7V VEN=0V, VIN=2.7V~7V VIN=5V,VO =0V,VEN<VEL VIN=2.5V,VO =0V,VEN<VEL . http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 2 of 6 SSC2129 CMOS Low Dropout Elektronische Bauelemente Voltage Regulator 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 Ordering Information(contd.) Part Number SSC2129-15 SSC2129-25 SSC2129-47 Marking 9B152 XXXX 9B252 XXXX 9B472 XXXX Output Voltage Part Number 1.5V SSC2129-18 2.5V SSC2129-33 4.75V SSC2129-50 Marking Output Voltage 9B182 XXXX 9B332 XXXX 9B502 XXXX 1.8V 3.3V 5.0V Characteristics Curve ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 6 SSC2129 Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A CMOS Low Dropout Voltage Regulator Any changing of specification will not be informed individual Page 4 of 6 SSC2129 Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A CMOS Low Dropout Voltage Regulator Any changing of specification will not be informed individual Page 5 of 6 SSC2129 Elektronische Bauelemente CMOS Low Dropout Voltage Regulator Detailed Description The SSC2129 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. External Capacitors The SSC2129 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. 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 capcacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on is desirable in some applications to limit turn-on surges. 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 pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1uA. This pin behaves much like an electronic switch. ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 6 of 6