MFG:MAXIM Package Cooled:SOP-8 D/C:98
MFG: MAXIM
Package Cooled: SOP-8
D/C: 98
Description: The MAX1649/MAX1651 BiCMOS, step-down, DC-DC switching controllers provide high efficiency over loads ...
The MAX1649/MAX1651 BiCMOS, step-down, DC-DC switching controllers provide high efficiency over loads ranging from 1mA to more than 2.5A. A unique, currentlimited pulse-frequency-modulated (PFM) control scheme gives these devices the benefits of pulse-width-modulation (PWM) converters (high efficiency at heavy loads), while using only 100µA of supply current (vs. 2mA to 10mA for PWM converters). Dropout performance down to 300mV is provided by a high switch duty cycle (96.5%) and a low current-sense threshold (110mV).
A high switching frequency (up to 300kHz) allows these devices to use miniature external components.
The MAX1649/MAX1651 have dropout voltages less than 0.3V at 500mA and accept input voltages up to 16V. Output voltages are preset at 5V (MAX1649), or 3.3V (MAX1651). They can also be adjusted to any voltage from 1.5V to the input voltage by using two
resistors.
These step-down controllers drive external P-channel MOSFETs at loads greater than 12.5W. If less power is required, use the MAX639/MAX640/MAX653 step-down converters with on-chip FETs, which allow up to a 225mA load current.
MAX1649
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The MAX1647/MAX1648 provide the power control necessary to charge batteries of any chemistry. In the MAX1647, all charging functions are controlled via the Intel System Management Bus (SMBus™) interface. The SMBus 2-wire serial interface sets the charg...
The MAX1647/MAX1648 provide the power control necessary to charge batteries of any chemistry. In the MAX1647, all charging functions are controlled via the Intel System Management Bus (SMBus™) interface. The SMBus 2-wire serial interface sets the charg...
The MAX1645EEI is one member of the MAX1645 family which is designed as the advanced chemistry-independent, level 2 battery charger with input current limiting that can be used in (1)notebook computers; (2)point-of-sale terminals; (3)personal digital assista...
The MAX1645BEEI is designed as one kind of advanced chemistry-independent, level 2 battery charger device that can be used in (1)notebook computers; (2)point-of-sale terminals; (3)personal digital assistants applications. And this device employs a next-gener...
The MAX1645A are high-efficiency battery chargers capable of charging batteries of any chemistry type. It uses the Intel System Management Bus (SMBusTM) to control voltage and current charge outputs.When charging lithium-ion (Li+) batteries, the MAX1645 auto...
The MAX1645 are high-efficiency battery chargers capable of charging batteries of any chemistry type. It uses the Intel System Management Bus (SMBusTM) to control voltage and current charge outputs.When charging lithium-ion (Li+) batteries, the MAX1645 autom...
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