S5U2188 1.5A CMOS Low Dropout Voltage Regulator Elektronische Bauelemente RoHS Compliant Product Description The S5U2188 of 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.The S5U2188 is stable with an output capacitance of 4.7µF or greater. Features REF. * Low Temperature Coefficient * Over-Temperature Shutdown * Adjustable Version * Very Low Dropout Voltage * High Accurate ± 1.5% A b L4 c L1 E Millimeter Min. Max. 4.40 4.80 0.66 0.91 0.00 0.30 0.36 0.5 2.29 2.79 9.80 10.4 REF. c2 L2 e L Millimeter Min. Max. 1.25 1.45 1.27 REF. 8.6 9.0 1.70 REF. 14.6 15.8 0˚ 8˚ * Short Circuit Current Fold-back * Guaranteed 1.5A output * Current Limiting * Power-Saving Shutdown Mode Applications * PC Peripherals * Wireless Devices * Portable Electronics * Battery Powered Widgets * Instrumentation Functional Block Diagram Typical Application Circuit S5U2188 http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 1 of 7 S5U2188 1.5A CMOS Elektronische Bauelemente Low Dropout Voltage Regulator Absolute Maximum Ratings Parameter Ratings Symbol Unit Input Voltage VIN 8 V Output Current IOUT PD/(VIN-VO) mA Output Voltage VOUT Operating Ambient Temperature Topr Max. Junction Temperature o Output Voltage Symbol VOUT (E) Output Current Current Limit Load Regulation IO ILIM REGLOAD (Note1) unless otherwise Condition Min Typ Max Unit VEN=VEHmin, IO=1mA -1.5% VOUT(T) 1.5% V VOUT>1.2V 1.5 - - A VOUT>1.2V 1.5 2.0 - A -1 0.2 1 % - - 1300 - - 800 - - 600 45 - IO=1mA to 1.5A 1.5V<VOUT(T) Ground Pin Current Line Regulation Input Voltage Over Temperature Shutdown Over Temperature Hysterisis Output Voltage Temperature Coefficient Short Circuit Current ADJ Input Bias Current Minimum Load Current ADJ Reference Voltage Power Supply Rejection Output Voltage Noise EN Input Threshold EN Input Bias Current Shutdown Supply Current C W B Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25 Dropout Voltage C o 3.0 PD EDS Classification Parameter C o -40~+125 150 Tj Max. T=100 C) V o -40~+85 Tj Junction Temperature Power Dissipation ( Gnd-0.3~VIN+0.3 VDROPOUT 2.0V IO=1.5A 2.0V<VOUT(T) 2.8V VO=VOUT(E)-2% 2.8V<VOUT(T) (Note2) IGND IO=1mA~1.5A - VOUT(T)<2.0V IO=1mA 2.0V VOUT(T)<4.0V VIN=VOUT(T)+1 to (T)+1 to VOUT(T)+2 4.0V VOUT(T) -0.15 - 0.15 REGLINE -0.1 0.02 0.1 -0.4 - 0.4 mV A % VIN OTS OTH Note3 - 7 - 150 - - 30 - TC - 30 - ppm/ - 750 - mA ISC IADJ IMin VREF PSRR eN VEH VEL IEH IEL ISD VOUT<0.4V VIN=5V, VADJ=1.242V Io=100mA Co=4.7 F ceramic V - 1 - A 1 - - mA V 1.223 1.242 1.261 f=1kHz - 50 - f=10kHz - 20 - - 30 - Vrms 2.0 - VIN V 0 - 0.4 V f=10Hz~100kHz Co=4.7 F Io=10mA, VIN=2.7V to 7V VIN=2.7V to 7V dB VIN=7V - - 0.1 A VEN= 0V, VIN=7V - - 0.5 A VIN=5V, VOUT=0V, VEN=0V - 0.5 2 A 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) =V OUT+VDROPOUT http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 2 of 7 S5U2188 1.5A CMOS Elektronische Bauelemente Low Dropout Voltage Regulator Ordering Information(contd.) Part Number Marking Output Voltage 8HAD2 XXXX Adjustable S5U 2188-AD Part Number Marking Output Voltage Detailed Description The S5U2188 of COMS regulator contains a PMOS pass transistor, voltage reference, error amplifier, overcurrent 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 140 , or the current exceeds 2.2A. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120 . The S5U2188 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 0.75 . External Capacitors The S5U2188 is stable with an output capacitance to ground of 4.7 F 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 0.1 F ceramic capacitor with a 10 F 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 0.1 F to have a beneficial effect. 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 pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is less than 1 A. This pin behaves much like an electronic switch. 100k resistor is necessary between VEN source and EN pin when VEN is higher than VIN. (Note: there is no internal pull-up for EN PIN) Adjustable Version The adjustable version uses external feedback resistors to generate an output voltage anywhere from 1.5V to 5.0V. Vadj is trimmed to 1.242V and Vout is given by the equation: VOUT=Vadj * (1+R1/R2) Feedback resistors R1 and R2 should be high enough to keep quiescent current low, but increasing R1+R2 will reduce stability. In general, R1 and R2 in the 10’s of k will produce adequate stability, given reasonable layout precautions. To improve stability characteristics, keep parasitic on the ADJ pin to minimum, and lower R1 and R2 values. ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 3 of 7 S5U2188 Elektronische Bauelemente 1.5A CMOS Low Dropout 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 S5U2188 Elektronische Bauelemente 1.5A CMOS Low Dropout Voltage Regulator 115 85 55 25 -5 -45 http://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 5 of 7 S5U2188 Elektronische Bauelemente ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A 1.5A CMOS Low Dropout Voltage Regulator Any changing of specification will not be informed individual Page 6 of 7 S5U2188 1.5A CMOS Elektronische Bauelemente Low Dropout Voltage Regulator External Resistor Divider Table R1(kΩ ) VOUT 1 2 1.30 21.41 1.35 11.50 1.40 1.45 5 10 20 50 R1(kΩ) VOUT 1 42.83 107.07 214.14 428.28 1070.7 3.20 0.63 1.27 3.17 6.34 12.69 31.72 23.00 57.50 115.00 230.00 575.00 3.25 0.62 1.24 3.09 6.19 12.37 30.93 7.86 15.72 39.30 78.61 157.22 393.04 3.30 0.60 1.21 3.02 6.03 12.07 30.17 5.97 11.94 29.86 59.71 119.42 298.56 3.35 0.59 1.18 2.95 5.89 11.78 29.46 1.50 4.81 9.63 24.07 48.14 96.28 240.70 3.40 0.58 1.15 2.88 5.76 11.51 28.78 1.55 4.03 8.06 20.16 40.32 80.65 201.62 3.45 0.56 1.13 2.81 5.63 11.25 28.13 1.60 3.47 6.94 17.35 34.69 68.39 173.46 3.50 0.55 1.10 2.75 5.50 11.00 27.50 1.65 3.04 6.09 15.22 30.44 60.88 152.21 3.55 0.54 1.08 2.69 5.38 10.76 26.91 1.70 2.71 5.42 13.56 27.12 54.24 135.59 3.60 0.53 1.05 2.63 5.27 10.53 26.34 1.75 2.44 4.89 12.22 24.45 48.90 122.24 3.65 0.52 1.03 2.58 5.16 10.32 25.79 1.80 2.23 4.45 11.13 22.26 44.52 111.29 3.70 0.51 1.01 2.53 5.05 10.11 25.26 1.85 2.04 4.09 10.21 20.43 40.86 102.14 3.75 0.50 0.99 2.48 4.95 9.90 24.76 1.90 1.89 3.78 9.44 18.88 37.75 94.38 3.80 0.49 0.97 2.43 4.86 9.71 24.28 1.95 1.75 3.51 8.77 17.54 35.08 87.71 3.85 0.48 0.95 2.38 4.76 9.52 23.81 2.00 1.64 3.28 8.19 16.39 32.77 81.93 3.90 0.47 0.93 2.34 4.67 9.35 23.36 2.05 1.54 3.07 7.69 15.37 30.74 76.86 3.95 0.46 0.92 2.29 4.59 9.17 22.93 2.10 1.45 2.90 7.24 14.48 28.95 72.38 4.00 0.45 0.90 2.25 4.50 9.01 22.52 2.15 1.37 2.74 6.84 13.68 27.36 68.39 4.05 0.44 0.88 2.21 4.42 8.85 22.12 2.20 1.30 2.59 6.48 12.96 25.93 64.82 4.10 0.43 0.87 2.17 4.35 8.69 21.73 2.25 1.23 2.46 6.16 12.32 24.65 61.61 4.15 0.43 0.85 2.14 4.27 8.54 21.35 2.30 1.17 2.35 5.87 11.74 23.48 58.70 4.20 0.42 0.84 2.10 4.20 8.40 20.99 2.35 1.12 2.24 5.60 11.21 22.42 56.05 4.25 0.41 0.83 2.06 4.13 8.26 20.64 2.40 1.07 2.15 5.36 10.73 21.45 53.63 4.30 0.41 0.81 2.03 4.06 8.12 20.31 2.45 1.03 2.06 5.14 10.28 20.56 51.41 4.35 0.40 0.80 2.00 4.00 7.99 19.98 2.50 0.99 1.97 4.94 9.87 19.75 49.36 4.40 0.39 0.79 1.97 3.93 7.87 19.66 2.55 0.95 1.90 4.75 9.50 18.99 47.48 4.45 0.39 0.77 1.94 3.87 7.74 19.36 2.60 0.91 1.83 4.57 9.15 18.29 45.73 4.50 0.38 0.76 1.91 3.81 7.62 19.06 2.65 0.88 1.76 4.41 8.82 17.64 44.11 4.55 0.38 0.75 1.88 3.75 7.51 18.77 2.70 0.85 1.70 4.26 8.52 17.04 42.59 4.60 0.37 0.74 1.85 3.70 7.40 18.49 2.75 0.82 1.65 4.12 8.24 16.47 41.18 4.65 0.36 0.73 1.82 3.64 7.29 18.22 2.80 0.80 1.59 3.99 7.97 15.94 39.86 4.70 0.36 0.72 1.80 3.59 7.18 17.96 2.85 0.77 1.54 3.86 7.72 15.45 38.62 4.75 0.35 0.71 1.77 3.54 7.08 17.70 2.90 0.75 1.50 3.75 7.49 14.98 37.45 4.80 0.35 0.70 1.75 3.49 6.98 17.45 2.95 0.73 1.45 3.64 7.27 14.54 36.36 4.85 0.34 0.69 1.72 3.44 6.88 17.21 3.00 0.71 1.41 3.53 7.06 14.13 35.32 4.90 0.34 0.68 1.70 3.40 6.79 16.98 3.05 0.69 1.37 3.43 6.87 13.74 34.35 4.95 0.33 0.67 1.67 3.35 6.70 16.75 3.10 0.67 1.34 3.34 6.68 13.37 33.42 5.00 0.33 0.66 1.65 3.30 6.61 16.52 3.15 0.65 1.30 3.25 6.51 13.02 32.55 R2(kΩ)=(1.242*R1(k Ω))/(VOUT-1.242) 2 5 10 20 50 R2(kΩ)=(1.242*R1(k Ω))/(VOUT-1.242) Note: Small load (greater than 2mA) is necessary as R1 or R2 is larger than 50kΩ. Otherwise, output voltage probably can not be pulled down to 0V on disable mode. ht tp://www.SeCoSGmbH.com/ 01-Jun-2002 Rev. A Any changing of specification will not be informed individual Page 7 of 7