MAX1844EEP+

Frequency - Switching:	200kHz, 300kHz, 450kHz, 600kHz
Base Part Number:	MAX1844
Supplier Device Package:	20-QSOP
Package / Case:	20-SSOP (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, On Time Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 5.5 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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MAX1844EEP+ Application Field and Working Principle

The MAX1844EEP+ is a DC/DC switching controller designed for high current automotive applications. It is one of the power management ICs (PMICs) in the MAX1844 family, which includes high-accuracy, low-temperature-grade dedicated controllers for automotive alternator applications, secondary DC/DC PCMCIA applications and main PCMCIA applications. MAX1844EEP+ is a dedicated controller for automotive alternator applications, providing excellent high-efficiency, high-accuracy, wide-band switching control with extremely low external component count.The MAX1844EEP+ is an automotive Voltage Regulator, specifically classified as a DC DC Switching Controller. It is typically used in automobiles to convert 12V DC from the battery to 14V DC for an array of components. Like many PMICs, the MAX1844EEP+ utilizes pulse width modulation (PWM) to regulate the output DC voltage. Understanding the operation of the MAX1844EEP+ is essential to the proper application and use of the device. The MAX1844EEP+ features a flexible analog/digital control interface and is capable of regulating an output voltage in the range of 0.8V to 14V. The input range is 1.9V to 35V. It features fast PWM switching frequency of up to 1MHz. The maximum current limit is 10.5A, with a maximum duty cycle of 100%. The MAX1844EEP+ is a simple on/off voltage regulator. When the device is enabled, it charges the output capacitor to the voltage setpoint. The switch connection (logic pin) and the output capacitor will provide the output voltage. The output voltage and current can be monitored by the Current Sense Input and Voltage Comparator pins, respectively. When the voltage is outside of the range, the output current falls below the min/max voltage thresholds, or the overcurrent threshold is exceeded, the MAX1844EEP+ will shut off the switch to prevent possible damage to the system. The MAX1844EEP+ features an additional protection feature to prevent over-current and over-temperature conditions. This protection is enabled or disabled via the Temperature Sense comparator and Current Sense pins, respectively. The MAX1844EEP+ has an internal soft-start and short-circuit protection feature. The soft-start feature allows the MAX1844EEP+ to gradually increase the output voltage after the enable pin is disabled. The soft-start circuit helps limit in-rush current in order to prevent any power-up issues. The MAX1844EEP+ allows configuring the output voltage and current to custom requirements. It can be put into several different operating modes depending on the user\'s requirements. The MAX1844EEP+ also allows providing various types of outputs – from low-current low-dropout (LDO) regulators to high-current DC-DC converters. It supports wide operating temperature range from -40 °C to +125°C, maintaining a constant output voltage over an extended temperature range.Whether it is for automobile, main PCMCIA or DC/DC secondary PCMCIA applications, the MAX1844EEP+ provides efficient and accurate DC voltage regulation for many applications. The device also provides an advanced level of fault protection, making it a reliable and robust solution low external component count. With its comprehensive set of features, the MAX1844EEP+ is the perfect choice for automotive voltage regulator applications.

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