MAX8556 MAXIM [Maxim Integrated Products], MAX8556 Datasheet
MAX8556
Available stocks
Related parts for MAX8556
MAX8556 Summary of contents
Page 1
... Other features include a logic-con- trolled shutdown mode, built-in soft-start, short-circuit protection with foldback current limit, and thermal-over- load protection. The MAX8556 features a POK output that transitions high when the regulator output is within ±10% of its nominal output voltage. The MAX8557 offers a power-on reset output that transitions high 140ms after the output has achieved 90% of its nominal output voltage ...
Page 2
Ultra-Low-Input-Voltage LDO Regulators ABSOLUTE MAXIMUM RATINGS IN, EN, POK, POR to GND .......................................-0.3V to +4V FB, OUT to GND ..........................................-0. Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T = +70°C) A 16-Pin Thin QFN (derate 33.3mW/°C above +70°C) ...
Page 3
ELECTRICAL CHARACTERISTICS (continued 1.8V 1.5V 2mA OUT OUT PARAMETER POK Output Current, High POK Delay Time EN Enable Input Threshold Enable Input Bias Current THERMAL SHUTDOWN Thermal-Shutdown Threshold POR ...
Page 4
... OUT 50mV/div (AC-COUPLED) I 2A/div OUT MAX8556 toc09 V IN 3.6V 2V/div V OUT 1V/div I OUT LINE-TRANSIENT RESPONSE 2. 1.8V V OUT (AC-COUPLED) 4.0 100µs/div 2A LOAD-TRANSIENT RESPONSE MAX8556 toc08 50mV/div 1A/div 40µs/div SHORT-CIRCUIT WAVEFORMS MAX8556 toc10 2V/div 1V/div 5A/div 200µs/div MAX8556 toc06 10mV/div ...
Page 5
... FREQUENCY (kHz) EXPOSED PADDLE TEMPERATURE vs. AMBIENT TEMPERATURE 100 DATA TAKEN USING 10 MAX8556 EVALUATION KIT AMBIENT TEMPERATURE (°C) FOLDBACK CURRENT-LIMIT WAVEFORMS V OUT I OUT 100µs/div _______________________________________________________________________________________ 4A Ultra-Low-Input-Voltage Typical Operating Characteristics (continued 20µ 20µ ...
Page 6
... EN for normal operation. EP — Exposed Paddle. Connect to GND and to a ground plane for heatsinking. IN THERMAL- OVERLOAD PROTECTION REF SHUTDOWN EN LOGIC MAX8556 (MAX8557) GND 6 _______________________________________________________________________________________ FUNCTION is regulated to 0.5V. Connect to the center tap of a resistor-divider from output FB THRESHOLD UNDERVOLTAGE LOCKOUT 0.50V 0.45V 0.55V Pin Description is outside ± ...
Page 7
... Drive EN high or connect to IN for normal operation. Power-OK Output (POK, MAX8556 Only) The MAX8556 features a power-OK (POK) output to indicate the status of the output. POK is high impedance when the regulator output is within ±10% of its nominal output voltage. If the output voltage falls/rises outside this range or the IC experiences thermal fault, POK is internally pulled low ...
Page 8
... OUT and GND. The input capacitor (C lowers the source impedance of the input supply. If the MAX8556/MAX8557s’ input is close to the output of the source supply, a smaller input capacitance can be used. Otherwise 10µF ceramic input capacitors are recommended. The output capacitor’ ...
Page 9
... The thermal landing should be at least as large as the exposed paddle and can be made larger depending on the amount of free space from the exposed paddle to the other pin landings. A sample layout is available on the MAX8556 evalua- tion kit to speed designs. TRANSISTOR COUNT: 3137 − ...
Page 10
Ultra-Low-Input-Voltage LDO Regulators (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.) D D/2 PIN # 1 I. ______________________________________________________________________________________ 0.15 C ...
Page 11
For the latest package outline information www.maxim-ic.com/packages.) COMMON DIMENSIONS PKG. 16L 5x5 20L 5x5 SYMBOL MIN. NOM. MAX. MIN. NOM. MAX. A 0.70 0.75 ...