Features: · MAX8563: 3 Outputs
· MAX8564/MAX8564A: 2 Outputs
· ±1% Feedback Regulation
· Adjustable Output Voltage Down to 0.5V
· Can Use Ceramic Output Capacitors
· Wide Supply Voltage Range Permits Operation from 5V or 12V Rails
· Individual Enable Control and POK Signal Allows Sequencing
· Overload Protection Against Soft Short-Circuit Condition
· Undervoltage Short-Circuit Protection
· Drive n-Channel MOSFETsApplication`Motherboards
`Dual/Triple Power Supplies
`Desknotes and Notebooks
`Graphic Cards
`Ultra-Low-Dropout
`Voltage Regulators
`Low-Voltage DSP, P, and Microcontroller Power
`SuppliesPinout
SpecificationsVDD to GND...........................................................-0.3V to +14V
DRV1, DRV2, DRV3, EN1, EN2,
EN3 to GND............................................-0.3V to (VDD + 0.3V)
FB1, FB2, FB3, POK1, POK2, POK3 to GND .............-0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
10-Pin MAX (derate 5.6mW/°C above +70°C) ....444.4mW
16-Pin QSOP (derate 8.3mW/°C above +70°C)....666.7mW
Operating Temperature Range ......................-40°C to +85°C
Junction Temperature..................................................+150°C
Storage Temperature Range ......................-65°C to +150°C
Lead Temperature (soldering, 10s) ...........................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe MAX8563/MAX8564/MAX8564A ultra-low-output dual and triple LDO controllers allow flexible and inexpensive point-of-load voltage conversion in motherboards,desknotes, notebooks, and other applications.
MAX8563 feature a 0.5V reference voltage with ±1% accuracy providing tight regulation of the output voltage.The MAX8563 has three n-channel MOSFET controller outputs, and the MAX8564/MAX8564A has two controller outputs.
Each controller MAX8563 output is adjustable from 0.5V to 3.3V when VDD = 12V and between 0.5V and 1.8V when VDD = 5V. Each output is independently enabled and asserts a POK signal when the output reaches 94% of the set value. Each output is protected against a soft short-circuit condition by an undervoltage comparator that disables the output when it drops to under 80% of the set voltage for more than 50s. For a catastrophic short condition, the regulators MAX8563 are shut down immediately if the output drops below 60% of the set voltage.
The MAX8563 is available in a 16-pin QSOP package, and the MAX8564/MAX8564A are available in a 10-pin MAX® package.
MAX8563 Data Sheet
