S5U2189 SECOS | Alldatasheet
Document overview
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Technical content
Features
- Low Temperature Coefficient * Over-Temperature Shutdown * Very Low Dropout Voltage * High Accurate 1.5% * Guaranteed 1.55 A output * Current Limiting * Portable Electronics
Applications
- PC Peripherals * Wireless Devices * Battery Powered Widgets * Instrumentation Typical Application Circuit Functional Block Diagram * Power-Saving Shutdown Mode The S5U2189 is stable with an output capacitance of 4.7mF or greater. The S5U2189 of positive,linear regulators feature low quiescent current (45mA 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.
Description
01-Jun-2002 Rev. A Page 1 of 7 http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual R o H S C o m p l i a n t P r o d u c t S5U2189 A 4.40 4.80 c2 1.25 1.45 b 0.66 0.91 L2 1.27 REF. L4 0.00 0.30 8.6 9.0 c 0.36 0.5 e 1.70 REF. L1 2.29 2.79 L 14.6 15.8 E 9.80 10.4 0˚ 8˚ Millimeter
http://www.SeCoSGmbH.com/ Elektronische Bauelemente Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 2 of 7 (T)+1 to Absolute Maximum Ratings Parameter Symbol Ratings Unit Input Max Voltage VIN 8 V Output Current IOUT PD/( VIN- VO) A Output Voltage VOUT Gnd-0.3 to V IN+0.3 V Operating Ambient Temperature Topr -40 ~ +85 : Junction Temperature Tj -40 ~ +125 : Maximum Junction Temperature Tj Max 150 : Thermal Resistance jc 5 :/W Internal Power Dissipation(æT=100:) PD 3.0 W EDS Classification B Electrical Characteristics VIN=VOUT(T)+2V, VEN=VIN, TA=25: unless otherwise Parameter Symbol Condition Min TYP Max Unit Output Voltage VOUT(E) (Note1) IO=1mA -1.5% VOUT(T) (Note2) 1.5% V Output Current IO VOUT>1.2V 1.55 - - A Current Limit ILIM VOUT>1.2V 1.55 2.0 - A Load Regulation REGLOAD IO=1mA to 1.5A -1 0.2 1 % 1.5V<VOUT(T) 2.0V - - 1000 2.0V<VOUT(T) 2.8V - - 800 Dropout Voltage VDROPOUT IO=1.55A VO=VOUT(E)-2% 2.8V<VOUT(T) - - 600 mV Ground Pin Current IGND IO=1mA~1.5A - 45 - A VOUT(T)<2.0V - - 0.15 Line Regulation REGLINE IO=1mA VIN=VOUT (T)+1 to VOUT(T)+2 2.0V VOUT(T) - 0.02 0.1 Input Voltage VIN Note3 - 7 V Over Temperature Shutdown OTS - 150 - : Over Temperature Hysterisis OTH - 30 - : Output Voltage Temperature Coefficient TC - 30 - ppm/: ADJ Input Bias Current IADJ VIN=5V, VADJ=1.242V - 1 - A ADJ Reference Voltage V REF 1.223 1.242 1.261 V f=1kHz - 50 - f=10kHz - 20 - Power Supply Rejection PSRR Io=100mA Co=4.7F ceramic f=100kHz - 15 - dB Output Voltage Noise eN f=10Hz~100kHz Io=10mA Co=4.7F - 30 - Vrms VEH VIN=2.7V to 7V 2.0 - V IN V EN Input Threshold VEL VIN=2.7V to 7V 0 - 0.4 V IEH VEN=VIN, VIN=2.7V to 7V - - 0.1 A EN Input Bias Current IEL VEN= 0V, VIN=2.7V to 7V - - 0.5 A VIN=5.0V, VO=0, VEN<VEL - 30 - A Shutdown Supply Current ISD VIN=2.5V, VO=0, VEN<VEL - 0.5 2 A Note 1: VOUT (E) =Effective Output Voltage (i.e. the output voltage when “V OUT (T) + 2.0V” is provided at the VIN pin while maintaining a certain IOUT value). 2: V OUT (T) =Specified Output Voltage 3: V IN (MIN) =VOUT+VDROPOUT S5U2189 1.55A CMOS Low Dropout Voltage Regulator
01-Jun-2002 Rev. A Page 3 of 7 ht tp://www.SeCoSGmbH.com/ A ny changing of specification will not be informed individual Elektronische Bauelemente S5U 2189-AD Part Number Marking Output Voltage Part Number Marking Output Voltage 9HAD2 AdjustableXXXX Ordering Information(contd.) Detailed Description The S5U2189 of COMS regulator contains 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 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:. External Capacitors The S5U2189 is stable with an output capacitance to ground of 4.7F 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 0.1F ceramic capacitor with a 10F 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 0.1F 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 1A. This pin behaves much like an electronic switch. 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. S5U2189 1.55A CMOS Low Dropout Voltage Regulator
01-Jun-2002 Rev. A Page 4 of 7 http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual Characteristics Curve S5U2189 1.55A CMOS Low Dropout Voltage Regulator
http://www.SeCoSGmbH.com/ Any changing of specification will not be informed individual 01-Jun-2002 Rev. A Page 5 of 7 S5U2189 1.55A CMOS Low Dropout Voltage Regulator
01-Jun-2002 Rev. A Page 6 of 7 ht tp://www.SeCoSGmbH.com/ A ny changing of specification will not be informed individual Elektronische Bauelemente S5U2189 1.55A CMOS Low Dropout Voltage Regulator
01-Jun-2002 Rev. A Page 7 of 7 ht tp://www.SeCoSGmbH.com/ A ny changing of specification will not be informed individual Elektronische Bauelemente External Resistor Divider Table R1(k ) 1 2 5 10 20 50 R1(k ) 1 2 5 10 20 50 VOUT R2(k )=(1.242*R1(k ))/(VOUT-1.242) VOUT R2(k )=(1.242*R1(k ))/(VOUT-1.242) Note: Small load (greater than 2mA) is necessary as R1 or R2 is larger than 50k . Otherwise, output voltage probably can not be pulled down to 0V on disable mode. Ω Ω Ω Ω Ω Ω Ω S5U2189 1.55A CMOS Low Dropout Voltage Regulator