MAX863EEE Maxim Integrated Products, MAX863EEE Datasheet
MAX863EEE
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MAX863EEE Summary of contents
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... Start-Up Voltage o 85µA Max Total Quiescent Supply Current o 1µA Shutdown Mode o Independent Shutdown Inputs o Drives Surface-Mount, Dual N-Channel MOSFETs o Low-Battery Input/Output Comparator o Step-Up/Down Configurable ______________Ordering Information PART MAX863C/D MAX863EEE *Dice are tested at T __________Typical Operating Circuit V IN OUT1 16 REF 15 SHDN2 ...
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... LBO Low Level V LBO,L 2 _______________________________________________________________________________________ Continuous Power Dissipation (T QSOP (derate 8.30mW/°C above +70°C) ...................667mW Operating Temperature Range + 0.3V) MAX863EEE ....................................................-40°C to +85°C DD Junction Temperature ......................................................+150°C + 0.3V) Storage Temperature Range .............................-65°C to +160°C DD Lead Temperature (soldering, 10sec) .............................+300°C CONDITIONS V ...
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Dual, High-Efficiency, PFM, Step-Up ELECTRICAL CHARACTERISTICS (V = +5V 0mA -40°C to +85°C, unless otherwise noted.) (Note 6) DD LOAD A PARAMETER SYMBOL V Input Voltage OUT1 Output Voltage V OUT1 (Note 3) ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller ____________________________Typical Operating Characteristics (continued +25°C, unless otherwise noted.) A EFFICIENCY vs. OUTPUT CURRENT (V = 12V, NON-BOOTSTRAPPED) OUT1 100 0.01 0.1 ...
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Dual, High-Efficiency, PFM, Step-Up ______________________________________________________________Pin Description PIN NAME 1 SENSE1 Feedback Input for DC-DC Controller 1 in Fixed-Output Mode Power-Supply Input DD Adjustable Feedback and Preset Output Voltage Selection Input for DC-DC Controller 1. Connect to V ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller FB2 REF ERROR COMPARATOR CURRENT-SENSE CS2 COMPARATOR 100mV CS1 SENSE1 V - 100mV DD FB1 100mV LBO REF N LBI Figure 1. Functional Diagram The flip-flop resets and turns off the MOSFET when either ...
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Dual, High-Efficiency, PFM, Step- 1.5V TO THE LOWER OUT1 OUT1 C1 C2 220µF 0.1µF 10V ≤0.1Ω 100k R6 Figure 2. Bootstrapped Typical Operating Circuit Continuous/Discontinuous-Conduction Each converter in the MAX863 ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller 20µs/div 287mA OUT1 V = 3.3V OUT1 PLOTS a-d: INTERNAL FEEDBACK PLOTS e-f: UNCOMPENSATED, EXTERNAL FEEDBACK A: MOSFET DRAIN, 2V/div 100mV/div, 3.3V DC OFFSET OUT ...
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Dual, High-Efficiency, PFM, Step- 2.7V TO 11V 12V OUT1 C1 100µF 16V ≤0.1Ω 10pF 1% LOW-BATTERY DETECTOR OUTPUT R9 C9 115k 82pF 1% Figure 4b. Adjustable Non-Bootstrapped Typical Operating Circuit Low-Voltage Start-Up ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller Shutdown Mode The MAX863 has two shutdown inputs useful for con- serving power and extending battery life. Driving SHDN1 or SHDN2 low turns off the corresponding DC- DC controller and reduces quiescent current. Driving ...
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Dual, High-Efficiency, PFM, Step-Up minimum input voltages. Estimate the maximum input currents for each output based on the minimum input voltage and desired output power OUT ( ) ≅ I IN,DC MAX 0 where 0.8 ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller Select the Inductor Component Two essential parameters are required for selecting the inductor: inductance and current rating. Inductance should be low enough to allow the MAX863 to reach the peak current limit during each ...
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Dual, High-Efficiency, PFM, Step-Up R1 MAX863 FB1 OR FB2 R2 Figure 7. Adjustable Output Circuit Voltage ripple is the sum of contributions associated with ESR and the capacitor value, as shown below: ≅ RIPPLE RIPPLE,ESR To ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller Set Feedback Compensation External voltage feedback to the MAX863 should be compensated for stray capacitance and EMI in the feedback network. Proper compensation is achieved when the MAX863 switches evenly, rather than in wide- ...
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Dual, High-Efficiency, PFM, Step-Up __________Applications Information Low-Input-Voltage Operation When the voltage at V falls and EXT1 or EXT2 DD approaches the MOSFET gate-to-source threshold volt- age, the MOSFET may operate in its linear region and dissipate excessive power. Prolonged operation ...
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Dual, High-Efficiency, PFM, Step-Up DC-DC Controller Step-Up/Down SEPIC Converter The circuit in Figure 9 provides a buck/boost function for applications where the input voltage range can be greater than or less than provides 3.3V (up to OUT1 ...