MAX8571 MAXIM [Maxim Integrated Products], MAX8571 Datasheet
MAX8571
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MAX8571 Summary of contents
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... For high-power require- ments, the MAX8574 and MAX8575 use a 500mA cur- rent limit and supply up to 20mA at 20V. The MAX8571 and MAX8573 use a 250mA current limit for a compro- mise between ripple and power. Built-in safety features protect the internal switch and down-stream compo- nents from fault conditions ...
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... SOT23-6 (derate 8.7 mW/°C above +70°C).............695 0.3V) CC Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C + 0.3V) CC Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C = 1.3V (MAX8570/MAX8571/MAX8574 +25°C.) (Note 1) A CONDITIONS rising, 50mV typical hysteresis T = +25° 5.5V ...
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... SW Soft-Start Time V Note 1: Parameters are production tested at T Note 2: Specified currents are measured at DC. Actual LX current limits are slightly higher in circuit due to current-limit comparator delay. Actual currents (with 2µH) are 110mA (MAX8570/MAX8572), 250mA (MAX8571/MAX8573), and 500mA (MAX8574/MAX8575). (MAX8571 3.6V 18V, Circuit of Figure 2, T ...
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... MAX8571 300 MAX8570 200 100 0 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 SUPPLY VOLTAGE (V) LINE TRANSIENT 3V TO 5.5V (MAX8571) V OUT V CC 100µs/div 3.6kΩ LOAD 3.9MΩ 287kΩ 4 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = +25°C, unless otherwise noted.) A EFFICIENCY vs. LOAD CURRENT WITH 22µH INDUCTOR 100 MAX8570, MURATA LQH32CN220K23 ...
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... V = 3.6V 18V, Circuit of Figure OUT LOAD TRANSIENT V OUT I OUT 100µs/div PIN NAME FB (MAX8570/ Feedback for setting the output voltage. Connect FB to the center of a resistor voltage-divider from the MAX8571/ output to GND to set positive output voltages. MAX8574) 1 OUT Output. The output voltage is preset to 15V. Connect a 1µ ...
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... MAX8574 ONLY) GND L1 22µ 15V D1 OUT 4.7µF MAX8572 MAX8573 MAX8575 OUT 1µF GND SHDN OFF L1 22µ MAX8570 10pF MAX8571 MAX8574 0.1µ 1µF GND SHDN C2 1µF +V OUT C2 1µ OUT ...
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... D1 to supply the output. The switching fre- quency varies depending on the load and input voltage and can 800kHz. Setting the Output Voltage The output voltage of the MAX8570, MAX8571, and MAX8574 is adjustable from V CC resistor voltage-divider (see Figure 2). Select R2 from 10kΩ ...
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High-Efficiency LCD Boost with True Shutdown Table 1. Protection Features COMMON APPLICATION FAULTS OUT to FB resistor missing or disconnected. Output cap missing and FB floating. FB shorted to GND. Diode missing or disconnected. Diode reverse polarity. FB node floating. ...
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... Figures 2 and 3) connected from the output to FB improves stability over a wide range of battery voltages. A 10pF capacitor is recommended for the MAX8571 and MAX8574. A 10pF to 47pF capacitor is recommended for the MAX8570. Note that increasing C4 degrades line and load regulation. Applications Information ...
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High-Efficiency LCD Boost with True Shutdown (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than ...