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MAXIM New Products - MAX2181A & MAX15569
2013-03-25
MAX2181A
FM Automotive Low-Noise Amplifier
Smaller BOM and Cost with Programmable Attack Point and Gain
Description
The MAX2181A is a highly integrated FM variable-gain low-noise amplifier ideal for use in automotive FM and FM-diversity active antenna applications. The device features an FM signal path, providing 30dB of gain range, controlled by an on-chip power detector. The FM signal path covers 76MHz to 162.5MHz.
The device is available in a small, 3mm x 3mm, TQFN package and operates over the extended industrial temperature range (-40°C to +85°C).
Key Features
- +5V Supply Voltage
- Integrated AGC Function Eliminates External Pin Diodes
- High Dynamic Range
- Low-Noise, Sub 3dB Noise Figure
- Low External BOM
- Small Package (3mm x 3mm TQFN)
- Integrated Power Detector
MAX15569
2-Phase/1-Phase, QuickTune-PWM Controller with Serial I²C Interface
ARM Core VR Solution and General I²C Controller
Description
The MAX15569 step-down controller consists of one multiphase regulator. The multiphase CPU regulator uses Maxim’s unique 2-phase QuickTune-PWM constant “on-time” architecture. The 2-phase CPU regulator runs 180° out-of-phase for true interleaved operation, minimizing input capacitance.
The device’s VR is controlled by writing appropriate data into a function-mapped register file. Output voltages are dynamically changed through a 2-wire, fast I²C interface (clock, data), allowing the switching regulator to be programmed to different voltages. A slew-rate controller allows controlled voltage transition and controlled soft-start. The regulator runs in a unique smart, low-power pulse-skipping-state algorithm for best efficiency over the full load range and the best transient response with respect to common pulse-skipping methods.
The device includes multiple fault-protection features: Output overvoltage protection (OVP), undervoltage protection (UVP), and thermal protection. When any of these fault-protection features detect a fault condition, the controller shuts down. A multifunction active-low INT output monitors output voltage, overcurrent (OC), overrange (VOUTMAX), and thermal faults (active-low VRHOT).
The controller has a programmable switching frequency, allowing 300kHz to 1400kHz per each phase of operation. The controller operates with a wide variety of drivers and MOSFETs, such as the MAX15492 MOSFET driver with standard MOSFETs, or with the power stage that integrates the drivers and MOSFETs together in a single device.
The device’s VR is controlled by writing appropriate data into a function-mapped register file. Output voltages are dynamically changed through a 2-wire, fast I²C interface (clock, data), allowing the switching regulator to be programmed to different voltages. A slew-rate controller allows controlled voltage transition and controlled soft-start. The regulator runs in a unique smart, low-power pulse-skipping-state algorithm for best efficiency over the full load range and the best transient response with respect to common pulse-skipping methods.
The device includes multiple fault-protection features: Output overvoltage protection (OVP), undervoltage protection (UVP), and thermal protection. When any of these fault-protection features detect a fault condition, the controller shuts down. A multifunction active-low INT output monitors output voltage, overcurrent (OC), overrange (VOUTMAX), and thermal faults (active-low VRHOT).
The controller has a programmable switching frequency, allowing 300kHz to 1400kHz per each phase of operation. The controller operates with a wide variety of drivers and MOSFETs, such as the MAX15492 MOSFET driver with standard MOSFETs, or with the power stage that integrates the drivers and MOSFETs together in a single device.
Key Features
-
2-Phase QuickTune-PWM CPU Core Regulator
- Transient Phase Overlap Reduces Output Capacitance
-
I²C Serial-Interface Control
- Output-Voltage Control
- System Status Register
- Current Monitor Register
-
Multifunction Active-Low INT Output
- Overcurrent, Output Voltage Overrange, Overvoltage, Undervoltage, and Thermal Fault Protection
- ±5mV FB Accuracy Over Line and Load
- 7-Bit DAC (0.5V to 1.6V, 10mV/LSB)
- True Differential Remote Output Sense
- Active Load-Line with Adjustable Gain
- Accurate Current Balance and Current Limit
- 4.5V to 24V Battery Input Range
- Programmable 300kHz to 1400kHz Switching Frequency
- Programmable Slew Rate and Soft-Start
