MAX1651ESA+

Frequency - Switching:	Up to 300kHz
Base Part Number:	MAX1651
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	96.5%
Series:	--
Voltage - Supply (Vcc/Vdd):	3 V ~ 16 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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MAX1651ESA+ Application Field and Working PrincipleThe MAX1651ESA+ is a voltage regulator from Power Management IC (PMIC) category with a DC-DC Switching Controller feature. Manufactured by Maxim Integrated, it is a patent-pending energy-efficient switching controller optimized for single-cell Lithium-Ion (Li+) and LiPo batteries. This IC integrates a special low power architecture suitable for system environments with various power constraints, providing an array of visibility and control functions.The MAX1651ESA+ is used in Li+ and LiPo battery power management systems where high efficiency is desired. It is well-suited for space-constrained applications like mobile phones, tablet PCs, and notebooks, as well as any other portable electronic device that requires a regulated voltage using Li+ or LiPo batteries. Additionally, it is designed to be used in a wide range of applications, from audio to communications systems, military, and instrumentation.The MAX1651ESA+ is a single-channel, serial input/output (SIO) device. It consists of a switching controller, a current limit circuit, an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). The switching controller offers high-accuracy current limit protection and adjustable switching frequency. It also features an effortless startup and maintains an optimal duty cycle for current-mode operation.The current limit circuit alone provides exceptional DC load and AC line load transient response, and requires no external components. The analog-to-digital (ADC) and digital-to-analog (DAC) converters function as a closed-loop control with input and output feedbacks. Furthermore, the MAX1651ESA+ also provides protection against under- and overvoltage, ESD and over/under temperature conditions.The MAX1651ESA+ also offers various control, monitoring, and diagnostics features. The Pr CORP voltage control mode, which is enabled through register settings, sets the Pr CORP voltage levels for output voltage control and reduces reactive output power present in most power management systems. The integrated fuse monitor feature monitors the overall status of the fuse, enabling potential system damage from an open- or short-circuit fault to be detected, indicated, and logged.The MAX1651ESA+ also features automatic compensation for its control loop, reducing the need for external components in the current loop. This results in a smaller space footprint for the device and a more cost-effective implementation of the power management system.In summary, the MAX1651ESA+ is a voltage regulator from Maxim Integrated’s PMIC family. It is an energy-efficient switching controller optimized for single-cell Li-Ion and LiPo batteries, and is well-suited for space-constrained applications like mobile phones, tablet PCs, and notebooks. It consists of a switching controller, a current limit circuit, an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC). Additionally, the MAX1651ESA+ offers control, monitoring, and diagnostics features as well as automatic compensation for its control loop.

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