SSC2156 600mA CMOS Elektronische Bauelemente Positive Voltage Regulator RoHS Compliant Product Description The SSC2156 positive,linear regulators feature low ground current (30µA 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. The SSC2156 is stable with an output capacitance of 2.2µF or greater. Features * Low Temperature Coefficient * Over-Temperature Shutdown * User Adjustable Output Voltages * Very Low Dropout Voltage * Accurate to within 1.5% * Guaranteed 600mA output * Current Limiting * Power-Saving Shutdown Mode * 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. Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets * Instrumentation Functional Block Diagram * Cordless Phones Typical Application Circuit SSC2156 VOUT=1.215*(1+R1/R2) C2 is unnecessary if R1 or R2 < 20KΩ R1 and R2 usd resistance vlaue within 1% accuracy for correct VOUT http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 1 of 7 SSC2156 600mA CMOS Elektronische Bauelemente Positive Voltage Regulator Absolute Maximum Ratings Parameter VIN Output Current IOUT Output Voltage VOUT Operating Ambient Temperature Topr Max. Junction Temperature T=100 C) V PD/(VIN-VO) mA V o C -40~+85 o C -40~+125 150 Tj Max. o Unit 8 Gnd-0.3 to VIN+0.3 Tj Junction Temperature Power Dissipation ( Ratings Symbol Input Voltage o C mW 810 PD EDS Classification B o Electrical Characteristics Ta=25 C unless otherwise noted Parameter Symbol 1 Typ. VOUT (T) 2 Output Voltage VOUT (E) -1.5% Output Current IO 600 _ Current Limit ILIM 600 800 Load Regulation Dropout Voltage REGLOAD VDROPOUT Ground Pin Current Line Regulation IGND REGLINE Input Voltage Over Temperature Shutdown Over Temperature Hystersis Output Voltage Temperature Coefficient Power Supply Rejection _ 0.2 _ _ _ _ _ _ _ 30 _ _ EN Input Threshold EN Input Bias Current Unit V 1.5% _ _ mA mA 1 % 800 mV 600 _ _ 0.15 0.02 0.1 uA % _ 7 OTS _ 150 _ o o OTH TC PSRR _ 30 _ _ 30 _ _ 50 _ 20 15 _ eN _ 30 _ VEH 2 _ VEL IEH 0 _ _ IEL _ _ 30 _ _ VIN 0.4 0.1 0.5 VO>1.2V VIN=VOUT(T)+2V,IO=1mA~600mA 2.0V<VOUT(T) ≤ 2.8V Io=600mA Vo=VOUT(E)-2% VIN=VOUT(T)+2V,IO=1mA~600mA Io=1mA VOUT(T)< 2.0V VIN=VOUT(T)+ 1 2.0V≥VOUT(T) to VOUT(T)+2 V C C ppm/ oC _ _ IO=1mA,VIN=VOUT(T)+2V VO>1.2V 2.8V<VOUT(T) Note 3 Condition 1.5V<VOUT(T) ≤ 2.0V 1400 VIN _ Output Voltage Noise Max. Min. f=1kHz dB uVrms V uA Short Circuit Current ISC _ Shutdown Supply Current ISD _ 300 600 mA ADJ Reference Voltage VREF 1.203 1.215 1.227 V f=10kHz IO=100mA Co=2.2uF f=100kHz f=10Hz~100kHz, Io=10mA CO=2.2uF VIN=2.7V to 7V VEN=VIN,VIN=2.7V~7V VEN=0V,VIN=2.7V~7V VIN=VOUT(T)+1V,VO<0.8V VIN=5V,VO=0,VEN<VEL 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 7 SSC2156 600mA CMOS Elektronische Bauelemente Positive Voltage Regulator Ordering Information(contd.) Part Number SSC2156-AD Marking Output Voltage 6EAD2 XXXX Adjustable Part Number Marking Output Voltage Detailed Description The SSC2156 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 exceeds150 C, or the current exceeds 600mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120o C. The SSC2156 switches from voltage mode when the load exceeds the rated output current.This prevents over-stress. The SSC2156 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8V. External Capacitors The SSC2156 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. 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 The Enable pin normally floats high. When actively, 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. ADJ The ADJ pin is the positive input to the error amplifier which, due to the PMOS pass element inversion, means it is actually the negative input of the LDO feedback loop. The feedback works to keep the voltage at the ADJ pin 1.215V with respect to ground. Since the internal circutry at the ADJ pin is essentially an ESD protected CMOS gate the input current at the ADJ pin is virtually zero. ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 7 SSC2156 600mA CMOS Elektronische Bauelemente 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 7 SSC2156 600mA CMOS Elektronische Bauelemente http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Positive Voltage Regulator Any changing of specification will not be informed individual Page 5 of 7 SSC2156 600mA CMOS Elektronische Bauelemente Positive Voltage Regulator External Resistor Divider Table R1(K Ohm) 1 2 VOUT 3 4 5 6 7 8 9 10 R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215) 1.30 14.29 28.59 42.88 57.18 71.47 85.76 100.06 114.35 128.65 142.94 1.35 9.00 18.00 27.00 36.00 45.00 54.00 63.00 72.00 81.00 90.00 1.40 6.57 13.14 19.70 26.27 32.84 39.41 45.97 52.54 59.11 65.68 1.45 5.17 10.34 15.51 20.68 25.85 31.02 36.19 41.36 46.53 51.70 1.50 4.26 8.53 12.79 17.05 21.32 25.58 29.84 34.11 38.37 42.63 1.55 3.63 7.25 10.88 14.51 18.13 21.76 25.39 29.01 32.64 36.27 1.60 3.16 6.31 9.47 12.62 15.78 18.94 22.09 25.25 28.40 31.56 1.65 2.79 5.59 8.38 11.17 13.97 16.76 19.55 22.34 25.14 27.93 1.70 2.51 5.01 7.52 10.02 12.53 15.03 17.54 20.04 22.55 25.05 1.75 2.27 4.54 6.81 9.08 11.36 13.63 15.90 18.17 20.44 22.71 1.80 2.08 4.15 6.23 8.31 10.38 12.46 14.54 16.62 18.69 20.77 1.85 1.91 3.83 5.74 7.65 9.57 11.48 13.39 15.31 17.22 19.13 1.90 1.77 3.55 5.32 7.09 8.87 10.64 12.42 14.19 15.96 17.74 1.95 1.65 3.31 4.96 6.61 8.27 9.92 11.57 13.22 14.88 16.53 2.00 1.55 3.10 4.64 6.19 7.74 9.29 10.83 12.38 13.93 15.48 2.05 1.46 2.91 4.37 5.82 7.28 8.73 10.19 11.64 13.10 14.55 2.10 1.37 2.75 4.12 5.49 6.86 8.24 9.61 10.98 12.36 13.73 2.15 1.30 2.60 3.90 5.20 6.50 7.80 9.10 10.40 11.70 12.99 2.20 1.23 2.47 3.70 4.93 6.17 7.40 8.63 9.87 11.10 12.34 2.25 1.71 2.35 3.52 4.70 5.87 7.04 8.22 9.39 10.57 11.74 2.30 1.12 2.24 3.36 4.48 5.60 6.72 7.84 8.96 10.08 11.20 2.35 1.07 2.14 3.21 4.28 5.35 6.42 7.49 8.56 9.63 10.70 2.40 1.03 2.05 3.08 4.10 5.13 6.15 7.18 8.20 9.23 10.25 2.45 0.98 1.97 2.95 3.94 4.92 5.90 6.89 7.87 8.85 9.84 2.50 0.95 1.89 2.84 3.78 4.73 5.67 6.62 7.56 8.51 9.46 2.55 0.91 1.82 2.73 3.64 4.55 5.46 6.37 7.28 8.19 9.10 2.60 0.88 1.75 2.63 3.51 4.39 5.26 6.14 7.02 7.90 8.77 2.65 0.85 1.69 2.54 3.39 4.23 5.08 5.93 6.77 7.62 8.47 2.70 0.82 1.64 2.45 3.27 4.09 4.91 5.73 6.55 7.36 8.18 2.75 0.79 1.58 2.37 3.17 3.96 4.75 5.54 6.33 7.12 7.92 2.80 0.77 1.53 2.30 3.07 3.83 4.60 5.37 6.13 6.90 7.67 2.85 0.74 1.49 2.23 2.97 3.72 4.46 5.20 5.94 6.69 7.43 2.90 0.72 1.44 2.16 2.88 3.61 4.33 5.05 5.77 6.49 7.21 2.95 0.70 1.40 2.10 2.80 3.50 4.20 4.90 5.60 6.30 7.00 3.00 0.68 1.36 2.04 2.72 3.40 4.08 4.76 5.45 6.13 6.81 3.05 0.66 1.32 1.99 2.65 3.31 3.97 4.63 5.30 5.96 6.62 3.10 0.64 1.29 1.93 2.58 3.22 3.87 4.51 5.16 5.80 6.45 3.15 0.63 1.26 1.88 2.51 3.14 3.77 4.40 5.02 5.65 6.28 3.20 0.61 1.22 1.84 2.45 3.06 3.67 4.28 4.90 5.51 6.12 3.25 0.60 1.19 1.79 2.39 2.99 3.58 4.18 4.78 5.37 5.97 3.30 0.58 1.17 1.75 2.33 2.91 3.50 4.08 4.66 5.24 5.83 ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 6 of 7 SSC2156 600mA CMOS Elektronische Bauelemente Positive Voltage Regulator External Resistor Divider Table R1(K Ohm) 1 2 VOUT 3 4 5 6 7 8 9 10 R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215) 3.35 0.57 1.14 1.71 2.28 2.85 3.41 3.98 4.55 5.12 5.69 3.40 3.45 0.56 1.11 1.67 2.22 2.78 3.34 3.89 4.45 5.00 5.56 0.54 1.09 1.63 2.17 2.72 3.26 3.81 4.35 4.89 5.44 3.50 0.53 1.06 1.60 2.13 2.66 3.19 3.72 4.25 4.79 5.32 3.55 0.52 1.04 1.56 2.08 2.60 3.12 3.64 4.16 4.68 5.20 3.60 0.51 1.02 1.53 2.04 2.55 3.06 3.57 4.08 4.58 5.09 3.65 0.50 1.00 1.50 2.00 2.49 2.99 3.49 3.99 4.49 4.99 3.70 0.49 0.98 1.47 1.96 2.44 2.93 3.42 3.91 4.40 4.89 3.75 0.48 0.96 1.44 1.92 2.40 2.88 3.36 3.83 4.31 4.79 3.80 0.47 0.94 1.41 1.88 2.35 2.82 3.29 3.76 4.23 4.70 3.85 0.46 0.92 1.38 1.84 2.31 2.77 3.23 3.69 4.15 4.61 3.90 0.45 0.91 1.36 1.81 2.26 2.72 3.17 3.62 4.07 4.53 3.95 0.44 0.89 1.33 1.78 2.22 2.67 3.11 3.55 4.00 4.44 4.00 0.44 0.87 1.31 1.75 2.18 2.62 3.05 3.49 3.93 4.36 4.05 0.43 0.86 1.29 1.71 2.14 2.57 3.00 3.43 3.86 4.29 4.10 0.42 0.84 1.26 1.68 2.11 2.53 2.95 3.37 3.79 4.21 4.15 0.41 0.83 1.24 1.66 2.07 2.48 2.90 3.31 3.73 4.14 4.20 0.41 0.81 1.22 1.63 2.04 2.44 2.85 3.26 3.66 4.07 4.25 0.40 0.80 1.20 1.60 2.00 2.40 2.80 3.20 3.60 4.00 4.30 0.39 0.79 1.18 1.58 1.97 2.36 2.76 3.15 3.54 3.94 4.35 0.39 0.78 1.16 1.55 1.94 2.33 2.71 3.10 3.49 3.88 4.40 0.38 0.76 1.14 1.53 1.91 2.29 2.67 3.05 3.43 3.81 4.45 0.38 0.75 1.13 1.50 1.88 2.25 2.63 3.00 3.38 3.76 4.50 0.37 0.74 1.11 1.48 1.85 2.22 2.59 2.96 3.33 3.70 4.55 0.36 0.73 1.09 1.46 1.82 2.19 2.55 2.91 3.28 3.64 4.60 0.36 0.72 1.08 1.44 1.79 2.15 2.51 2.87 3.23 3.59 4.65 0.35 0.71 1.06 1.41 1.77 2.12 2.48 2.83 3.18 3.54 4.70 0.35 0.70 1.05 1.39 1.74 2.09 2.44 2.79 3.14 3.49 4.75 0.34 0.69 1.03 1.37 1.72 2.06 2.41 2.75 3.09 3.44 4.80 0.34 0.68 1.02 1.36 1.69 2.03 2.37 2.71 3.05 3.39 4.85 0.33 0.67 1.00 1.34 1.67 2.01 2.34 2.67 3.01 3.34 4.90 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.30 4.95 0.33 0.65 0.98 1.30 1.63 1.95 2.28 2.60 2.93 3.25 5.00 0.32 0.64 0.96 1.28 1.61 1.93 2.25 2.57 2.89 3.21 ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. 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