RT9181-18PB RICHTEK [Richtek Technology Corporation], RT9181-18PB Datasheet
RT9181-18PB
Related parts for RT9181-18PB
RT9181-18PB Summary of contents
Page 1
... LDO Regulator with PGOOD General Description The RT9181 is a low dropout voltage regulator with an output 2% accuracy and supply a continuous 150mA current within operating range from a +3V to +5.5V input. The power good function monitors the output voltage and indicates by pulling low the power good output (open drain) ...
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... RT9181 Function Block Diagram VIN EN Functional Pin Description Pin Name VIN Power Input Voltage GND Ground EN Chip Enable (Active High) PGOOD Power Good Indicator VOUT Output Voltage Timing Diagram 90% max PGOODH V OUT PGOOD www.richtek.com 2 Shutdown Undervoltage Current Control Lockout Limit ...
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... Output reaches % PGOODH timer (power good 3.3V 2mA See timing diagram D(PGOOD) Maximum voltage overshoot allowed on V PGOODL output during power-up RT9181 0.4W − 65°C to 150°C − 40°C to 110°C Min Typ −1.5 -- −2 -- 160 300 90 160 −0 ...
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... RT9181 Parameter Thermal Shutdown Temperature Thermal Shutdown Hysteresis Power Supply Rejection Rate Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied ...
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... Output Voltage vs. Supply Voltage 1.210 1.205 1.200 1.195 1.190 3.0 3.5 4.0 4.5 Supply Voltage (V) Current Limit vs. Supply Voltage 400 350 300 250 200 3 3.5 4 4.5 Supply Voltage (V) Quiescent Current vs. Temperature 180 175 170 165 160 155 150 - Temperature (°C) RT9181 I = 0.1mA OUT 5.0 5.5 6 www.richtek.com 5 ...
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... RT9181-18 4.5 5.0 5.5 6.0 Line Transient Response ≈ 5.5 4.5 Time (1ms/Div) PGOOD Delay Time vs. Temperature 3.0 2.5 2.0 1.5 1.0 0.5 0.0 - Temperature (°C) UVLO Response at Power ≈ 1.5 1 0.5 0 Time (5ms/Div) DS9181-14 March 2007 V = 4 1uF OUT I = 150mA O ≈ RT9181- ≈ 1uF OUT ...
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... PGOOD Response at Power Down ≈ 1.2V 0.5 0 Time (25us/Div) DS9181-14 March 2007 ≈ ≈ 1uF OUT RT9181 PGOOD Response vs. V OUT 2ms delay V IN Time (1ms/Div) www.richtek.com ≈ ...
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... RT9181 must be carefully selected for regulator stability and performance. Using a capacitor whose value is ≥ 1μF on the RT9181 input and the amount of capacitance can be increased without limit. The input capacitor must be located a distance of not more than 0.5" from the input pin of the IC and returned to a clean analog ground. = +110° ...
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... DS9181-14 March 2007 Reverse Current Path The power transistor used in the RT9181 has an inherent diode connected between each regulator input and output (see Figure 1). If the output is forced above the input by more than a diode-drop, this diode will become forward ...
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... RT9181 Outline Dimension Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 www.richtek.com Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.559 2.591 2 ...