MAX8805Y MAXIM [Maxim Integrated Products], MAX8805Y Datasheet
MAX8805Y
Related parts for MAX8805Y
MAX8805Y Summary of contents
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... The feedback network is integrated, further reducing external component count and total solution size. The MAX8805Y/MAX8805Z use an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. At high duty cycle, the MAX8805Y/MAX8805Z automatically switch to the bypass mode, connecting the input to the output through a low-impedance (60mΩ ...
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... IN1B IN2 , rising, 180mV typical hysteresis IN1B IN2 T = +25° EN1 EN2 T = +85° 0V LDO1 LDO2 MAX8805Y = 0A, EN2 PA MAX8805Z = 3.6V EN2 HP rising, 20°C typical hysteresis ≤ 5. IN1A IN1B IN2 ≤ 5. IN1A IN1B ...
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... A IN1B IN2 = +85°C PAB A MAX8805YEWEAA+T MAX8805YEWEBC+T MAX8805YEWECC+T = 5.5V 1mA; LDO1 = 3.4V 100mA MAX8805YEWEDD+T LDO1 MAX8805YEWEEE+T MAX8805YEWEGG ≥ 2.5V) = 100mA +25° LDO1 stepped from 3.5V to 5.5V 100mA LDO1 stepped from 50µA to 200mA = 1µ 30mA LDO1 LDO1 = 1µ 30mA LDO1 LDO1 < 10mA LDO1 < ...
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... Note 1: All devices are 100% production tested _______________________________________________________________________________________ = V = 3.6V 0V 0.9V, T EN2 HP REFIN CONDITIONS MAX8805YEWEAA+T MAX8805YEWEAC+T = 5.5V 1mA; LDO2 MAX8805YEWEAD+T = 3.4V 100mA LDO2 MAX8805YEWEBE+T MAX8805YEWEGG 100mA +25°C A stepped from 3.5V to 5.5V 100mA LDO2 stepped from 50µA to 200mA = 1µ 30mA LDO2 LDO2 = 1µ 30mA LDO2 LDO2 < 10mA LDO2 < 200mA LDO2 = 0V ≤ ...
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... PA STEP-DOWN CONVERTER EFFICIENCY vs. LOAD CURRENT (MAX8805Z) 100 3.2V 80 IN1 V = 3.6V IN1 V IN1 4.5 0 100 200 300 400 LOAD CURRENT (mA) PA STEP-DOWN CONVERTER EFFICIENCY vs. LOAD CURRENT (MAX8805Y) 100 3.6V 80 IN1 V = 4.2V IN1 V = 3.2V IN1 600 0 100 200 300 400 LOAD CURRENT (mA) = 7.5Ω ...
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... V = 4.2V IN1 60 50 300 400 500 600 0 PA STEP-DOWN CONVERTER OUTPUT 4.0 3.5 MAX8805Y 3.0 2.5 2.0 1.5 1.0 0.5 300 400 500 600 0 REFIN vs. REFIN TO OUT GAIN (MAX8805Y 4.2V, NO LOAD IN1 10 -10 -30 -50 0.4 = +25°C, unless other- A vs. LOAD CURRENT (MAX8805Y 0. 4.2V IN1 V = 3.6V IN1 V = 3.2V IN1 100 200 ...
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... AC-COUPLED 500mA/div 2V/div V = 1.2V 500mA PA PA MAX8805Y/Z toc20 V PA_EN 2V/div 1V/div V 500mA/div = +25°C, unless other STEP-DOWN CONVERTER LIGHT-LOAD SWITCHING WAVEFORMS (MAX8805Y) MAX8805Y/Z toc17 PA 20mV/div I LX 200mA/div 2V/div 1.2V 50mA PA PA 400ns/div PA STEP-DOWN HEAVY-LOAD SWITCHING WAVEFORMS (MAX8805Y) MAX8805Y/Z toc19 PA 20mV/div ...
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... V 0. 10μs/div 8 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = 2.85V 2.85V 7.5Ω, circuit of Figure 5, T LDO1 LDO2 PA PA STEP-DOWN CONVERTER LINE TRANSIENT RESPONSE (MAX8805Y) MAX8805Y/Z toc22 4.0V 4.0V V IN1 500mV/div V PA 50mV/div AC-COUPLED I 200mA/div LX PA STEP-DOWN CONVERTER LOAD TRANSIENT RESPONSE (MAX8805Y) MAX8805Y/Z toc24 ...
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... V = 3.6V 1.2V, V IN1A IN1B IN2 PA wise noted.) PA STEP-DOWN CONVERTER AUTOMATIC BYPASS-FET TRANSIENT RESPONSE 1.8V V REFIN 0. 10μs/div PA STEP-DOWN CONVERTER SHUTDOWN RESPONSE (MAX8805Y PA_EN 1. 10μs/div LDO1, LDO2 SUPPLY CURRENT vs. SUPPLY VOLTAGE 200 150 100 50 0 2.0 2.5 3.0 3.5 4.0 SUPPLY VOLTAGE (V) ...
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... Figure +25°C, unless other- A LDO OUTPUT NOISE SPECTRAL DENSITY vs. FREQUENCY 0.01 0 100 1000 FREQUENCY (kHz) LDO LINE TRANSIENT RESPONSE MAX8805Y/Z toc37 4.0V 4.0V IN2 500mV/div 3.5V 5mV/div I = 80mA LDO_ 20μs/div LDO1, LDO2 TURN ON AND SHUTDOWN RESPONSE MAX8805Y/Z toc39 2V/div 2V/div 2V/div 1ms/div ...
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PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power PIN NAME Reference Noise Bypass. Bypass REFBP to AGND with a 0.22µF ceramic capacitor to reduce noise on the A1 REFBP LDO outputs. REFBP is internally pulled ...
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PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power IN1A IN1B REFIN IN2 REFBP 1.25V REFERENCE AGND BANDGAP EN1 CONTROL EN2 LOGIC PA_EN Figure 1. Block Diagram 12 ______________________________________________________________________________________ ...
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... However, when calculating the required REFIN voltage, the load regulation should be considered. Because inductor resistance is typically well specified and the typical resistive load, the MAX8805Y/MAX8805Z gain is slightly less than 2V/V. REFIN ...
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... The higher switching frequency of the MAX8805Z allows the use of physically smaller inductors at the cost of slightly lower efficiency. The lower switching frequency of the MAX8805Y results in greater efficiency at the cost of a physically larger inductor. See the Typical Operating Characteristics for efficiency graphs for both the MAX8805Y and MAX8805Z ...
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... IN1 the current peaks drawn from the battery or input power source and reduces switching noise in the MAX8805Y/MAX8805Z. The impedance of C switching frequency should be kept very low. Ceramic capacitors with X5R or X7R dielectric are highly recom- mended due to their small size, low ESR, and small temperature coefficients. A 2.2µ ...
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... PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Thermal Considerations In most applications, the MAX8805Y/MAX8805Z do not dissipate much heat due to their high efficiency. However, in applications where the MAX8805Y/ MAX8805Z run at high ambient temperature with heavy loads, the heat dissipated may exceed the maximum junction temperature of the IC. If the junction tempera- ture reaches approximately +160° ...
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PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power AGND C BYP C LDO2 C IN2 VIN Figure 3. Recommended PCB Layout ______________________________________________________________________________________ PGND VPA C LDO1 5.5mm C C IN1 ...
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... DAC BASEBAND PROCESSOR PA_EN GPIO GPIO GPIO GPIO 1μF *1μH FDK MIPS 2520D1R0 2.2μH FDK MIPF 2520D2R2 Figure 4. Typical Application Circuit Using LDOs for PA Enable/Bias 18 ______________________________________________________________________________________ MAX8805Y/MAX8805Z IN1A IN1B REFIN 2MHz OR 4MHz BUCK HP EN1 CONTROL EN2 IN2 REF LDO1 LDO2 1μH OR 2.2μ ...
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... Li+ BATTERY 2.2μF DAC BASEBAND PROCESSOR GPIO GPIO GPIO GPIO 2.2μF *1μH FDK MIPS 2520D1R0 2.2μH FDK MIPF 2520D2R2 Figure 5. Typical Application Circuit Using LDOs for RF Power ______________________________________________________________________________________ MAX8805Y/MAX8805Z IN1A IN1B REFIN 2MHz OR 4MHz BUCK PA_EN HP EN1 CONTROL EN2 IN2 REF LDO1 LDO2 1μ ...
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PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power Pin Configuration TOP VIEW REFBP AGND REFIN LDO2 PA_EN EN2 IN2 HP IN1B LDO1 EN1 PAB D3 D1 ...
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PWM Step-Down Converters in 2mm x 2mm WLP for WCDMA PA Power (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Maxim cannot assume responsibility ...