SC189 SEMTECH [Semtech Corporation], SC189 Datasheet
SC189
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SC189 Summary of contents
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... The voltage mode architecture is compatible with chip inductors and capacitors for minimum PCB footprint and lowest overall system cost. Total footprint of 25mm be achieved - making the SC189 the ideal solution for high density systems. Solution height of <1mm is also possible 93% efficiency is achieved with low R switches ...
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... See Table 1 for the code. For example, the device number for VOUT= 1.20V is SC189CULTRT. (5) “x” is the code of the output voltage. See Table 1 for the code. For example, the EVB for MLPD-UT6 package with VOUT= 1.20V is SC189CEVB (Standard Size) or SC189CEVB-1 (Small Size) ...
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... Min Typ 2.60 2.70 IN 250 -2.5 2.0 7.5 1 0.13 0.15 0.10 0.125 1 -10 -1 =0A ±1.0 OUT ±1.0 2.0 2.5 100 -2.0 www.semtech.com SC189 =+25 °C. A Max Units 2. +2 µA Ω 10 µ 3.0 MHz µs 2.0 µA ...
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... Guaranteed by design. © 2009 Semtech Corp. <+85 °C; T =125°C; Unless otherwise noted typical values are T A J(MAX) Conditions I EN=GND EN_LO V EN_HI V EN_LO V OVP T Junction Temperature SD T Junction Temperature SD_HYS 4 SC189 =+25 °C. A Min Typ Max Units -2.0 2.0 µA 1.2 V 0.4 V 115 % +160 °C 10 °C www.semtech.com ...
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... Typical Characteristics Circuit Conditions 10uF/6.3V 10uF/6.3V for L=2.2uH OUT Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package. Efficiency vs. Load Current (V Efficiency 100% 95 90% 85% 80% 75 3. 1.50V OUT 65% T =25° 60% 0.0 0.3 0.6 Output Current (A) Efficiency vs. Load Current (V Efficiency 100% L=1071AS-2R2N (50m ...
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... Typical Characteristics (continued) Circuit Conditions 10uF/6.3V 10uF/6.3V for L=2.2uH OUT Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package. Efficiency vs. Load Current (V Efficiency 100% 95 90% 85% 80% 75 3. 1.50V OUT 65% T =25° 60% 0.0 0.3 0.6 Output Current (A) Efficiency vs. Load Current (SOT23-5) ...
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... Typical Characteristics (continued) Circuit Conditions 10uF/6.3V 10uF/6.3V for L=2.2uH OUT Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package. R Variation vs. Input Voltage RDSON (P & N) Variation over Line DS(ON) 30% 25% P-Channel 20% 15% 10 ±100mA N-Channel LX - 25° -10% 2 ...
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... Typical Characteristics (continued) Circuit Conditions 10uF/6.3V 10uF/6.3V for L=2.2uH OUT Unless otherwise noted, L= 2.2uH (TOKO: 1071AS-2R2M) and SC189 in MLPD-UT6 package. Load Regulation (V Load Regulation 1. 1.50V OUT 0.8% T =25° 0.6% 0.4% 0.2% 0.0% -0.2% -0.4% -0. 5.0V IN -0.8% -1.0% 0.0 0.3 0.6 Output Current (A) UVLO Rising Threshold Variation UVLO Rising Threshold Variation 1 ...
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... Typical Waveforms Circuit Conditions: V =1.5V (SC189HULTRT); L= 2.2uH (TOKO: 1071AS-2R2M); C OUT Output Voltage Ripple (V Output Voltage Ripple (V V OUT 10mV/div I LX 500mA/div V LX 2V/div V =5.0V 500ns/div IN I =0A OUT Output Voltage Ripple (V Output Voltage Ripple (V V OUT 10mV/div I LX 500mA/div V LX 2V/div V =3.3V 500ns/div IN I =0A OUT ...
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... Typical Waveforms (continued) Circuit Conditions: V =1.5V (SC189HULTRT); L= 2.2uH (TOKO: 1071AS-2R2); C OUT Start Up (Enable)(V Start Up (V OUT V IN 2V/div V EN 2V/div V OUT 1V/div V =5.0V 100µs/div IN R =1k OUT Start Up (V =1.5V), EN=VIN Start Up (Power OUT 2V/div V OUT 500mV/div V =5.0V 200µs/div ...
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... Typical Waveforms (continued) Circuit Conditions: V =3.3V (SC189ZULTRT); L= 2.2uH (TOKO: 1071AS-2R2); C OUT Output Voltage Ripple (V Output Voltage Ripple (V V OUT 10mV/div I LX 500mA/div V LX 2V/div V =5.0V 500ns/div IN I =0A OUT Transient Response (V Transient Response (V =3.3V 0.5A) OUT V OUT 100mV/div I OUT 500mA/div V =5.0V 50µs/div IN I =0A to 0.5A ...
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... Typical Waveforms (continued) Circuit Conditions: V =3.3V (SC189ZULTRT); L= 2.2uH (TOKO: 1071AS-2R2); C OUT Start Up (Power up V Start Up (V =3.3V), EN=VIN ) (V OUT 2V/div V OUT 1V/div V =5.0V 200µs/div IN R =1k OUT Start Up into Pre-Biased Output (V Start Up into Pre-Bias Output (Enable 2V/div V EN 2V/div V OUT ...
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... Typical Waveforms (continued) Circuit Conditions: V =1.0V (SC189AULTRT); L= 1uH (Murata: LQM2HPN1R0NG0L); C OUT Output Voltage Ripple (V Output Voltage Ripple (V V OUT 10mV/div I LX 500mA/div Offset 2V/div V =3.3V 500ns/div IN I =0A OUT Output Voltage Ripple (V Output Voltage Ripple (V V OUT 10mV/div I LX 500mA/div V LX 2V/div V =5.0V 500ns/div ...
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... Pin Function NC No connection. Enable pin. When connected to logic high or tied to VIN pin, the SC189 is on. When con- nected to logic low, the device enters shutdown and consumes less than 1µA of current. EN The enable pin has a 1 MΩ internal pulldown resistor. This resistor is switched in circuit whenever the EN pin is below the enable input high threshold, or when the part is in un- dervoltage lockout ...
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... Block Diagram Internal Oscillator V OVP Voltage VOUT Select 500mV Ref EN © 2009 Semtech Corp. Plimit Comp Plimit Amp Ramp + - Generator OVP - + - - + + Error Amp PWM Comp 15 SC189 + - Current Amp Control Logic www.semtech.com VIN LX GND ...
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... The internal PMOS power device in the switching stage is protected by current limit feature. If the output is loaded above the PMOS current limit for 32 consecutive cycles the SC189 enters foldback current limit mode and the OUT output current is limited to the current limit holding C OUT ...
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... SC189 will not discharge the output during the soft start interval. = 5.0V Shut Down When the EN pin voltage goes low, the SC189 will run in shutdown mode, drawing less than 1μA from the input power supply. The internal switches and bandgap voltage will be immediately turned off. ...
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... X5R,0805 LQM2HPN1R0MG0 10uF,4.0V X5R,0603 L(1.8V),N(2.0V),T(Y)(2.5V),V(2.7V),Z(3.3V) Part Number Description 10uF,6.3V 1071AS-2R2N X5R,0805 22uF,6.3V 1071AS-1R0N X5R,0805 22uF,6.3V X5R,0805 MDT2520-CR1R0M 10uF,4.0V X5R,0603 18 SC189 Output Capacitor Vender Part Number Murata GRM21BR60J106K Murata GRM21BR60J226M Murata GRM21BR60J226M Murata GRM219R60J106K Murata GRM21BR60J226M Murata GRM188R60G106M Output Capacitor Vender Part Number ...
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... OUT C Selection OUT The internal voltage loop compensation in the SC189 limits the minimum output capacitor value to 10μF if using the inductor of 2.2μH. This is due to its influence on the the loop crossover frequency, phase margin, and gain margin. Increasing the output capacitor above this minimum value will reduce the crossover frequency and provide greater phase margin ...
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... Table 3 lists the manufacturers of recommended output capacitor options. C Selection IN The SC189 source input current supply current with a triangular ripple imposed on it. To prevent large input voltage ripple, a low ESR ceramic capacitor is required. A minimum value of 4.7μF should be used important to consider the DC voltage coefficient charac- teristics when determining the actual required value ...
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... Route the output voltage feedback/sense path away from inductor and LX node to minimize noise and magnetic interference. 4. Use a ground plane referenced to the SC189 GND pin. Use several vias to connect to the component side ground to further reduce noise and interference on sensitive circuit nodes possible, minimize the resistance from the VOUT and GND pins to the load ...
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... BSC 0.50 BSC .010 .014 .018 0.25 0.35 0. .003 0.08 .004 0.10 DIMENSIONS INCHES MILLIMETERS (.077) (1.95) .047 1.20 .067 1.70 .031 0.80 .020 0.50 .006 0.15 .012 0.30 .030 0.75 .106 2.70 www.semtech.com SC189 ...
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... CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805) 498-2111 Fax: (805) 498-3804 www.semtech.com 23 (2.50) 1.40 0.95 0.60 1.10 3.60 www.semtech.com SC189 ...