The MIC22950 is a pioneering product in Micrel's high power density family of buck regulators. The synchronous step-down regulator features a 10A integrated SuperThermal MOSFET and is optimized for highest efficiency. With only a 1µH inductor and a 100µF output capacitor, the device achieves more than 95 percent efficiency over a broad load range. It also features built-in sequencing, tracking and ramp control capabilities that enable multiple power-up sequencing and tracking protocols. The solution is ideal for high power density point-of-load conversion, base stations, servers and routers, Blu-ray players, computer peripherals, FPGAs, DSPs and low voltage ASIC power applications. The MIC22950 has an ultra-high speed control loop that keeps the output voltage within regulation even under extreme transient load swings that are commonly found in FPGAs and low-voltage ASICs. The RC (Ramp Control) pin allows the device to be connected to another product in Micrel's MIC22xxx and/or its MIC68xxx family, thereby allowing the designer to maintain the output voltages within a certain delta-V on start up.
The MIC4782 is a new dual non-synchronous PWM buck regulator targeting consumer applications. Operating at 1.8MHz, with a maximum load current of 2A per channel, the MIC4782 is the latest addition to the popular low-voltage family of small footprint, non-synchronous buck regulators. The IC addresses the designer's need for a low-cost dual regulator solution for the popular 5V and 3.3V rails in consumer applications. The device targets cost sensitive consumer applications such as wired and wireless broadband communication equipments, printers, HD set top boxes, computing peripherals and low power FPGAs -- all applications where total solution cost is a critical design consideration. The MIC4782 features ultra-fast operation and a proprietary internal compensation which allows for ultra-fast transient response. Further, the high PWM frequency of operation allows the use of the smallest and most cost-effective LC components. Each channel provides up to 2A of output current, while designers can realize more than 92 percent efficiency.
The MIC2174 is the latest, premium member of its Hyper Speed Control family of adaptive on-time controllers. The device is a high performance, first-in-its-class DC-to-DC controller capable of high delta V operation (VIN=40V, VOUT=0.8V) and can drive up to 25A of load current. The Hyper Speed Control architecture significantly reduces the required output capacitance and allows for excellent transient response. The solution is ideal for industrial equipment power supply, automotive applications, computer peripherals and distributed DC power systems. The MIC2174 operates at 300kHz constant frequency and achieves greater than 94 percent efficiency, over a broad load range. The device is easy to use and is stable even with a zero-ESR output capacitor, making designs very robust and offering the ability to scale down external capacitors. The MIC2174 Hyper Speed Control DC-to-DC controller operates over a wide input supply range of 3V to 40V and also offers cycle-by-cycle current limiting for FET protection.
The MIC3201 is a new Step-Down High Brightness LED (HBLED) driver with high-side current sense. This device is the first in a new series of high brightness LED drivers targeting MR-16 lamps and other general illumination applications. This device reduces the size, complexity and cost of the driver IC solutions for various lighting applications. The MIC3201 is capable of driving up to four, 1A HBLEDs in a series at more than 90 percent efficiency with +/- 5 percent current accuracy from input voltages of 4.5V to 20V. With its hysteretic control architecture and high-side current sense scheme, the MIC3201 is well positioned to provide constant current with changes in input voltage and output load. The MIC3201 operating frequency is adjustable up to 1MHz to allow flexibility in the design. The MIC3201 features a dedicated PWM dimming pin, an enable pin for very low power shutdown, over temperature protection and UVLO. The MIC3201 has an internal power switch and requires no external compensation. In addition to enhanced power driving capability/reliability, the MIC3201comes in an exposed pad SOIC-8L package.
The MIC3230/31/32 is a new family dedicated of high brightness LED drivers. These devices are the first in a new series of high brightness LED drivers targeting solid-state lighting and general illumination applications. This LED driver provides the flexibility of driving 1W, 3W and higher power LEDs that are available on the market today. The MIC3230/31/32 series features a wide operating input voltage range from 6V to 45V. The MIC323x family of LED drivers has a feedback voltage of 250mV to reduce system level power dissipation and a programmable current control in order to drive the differing current levels available for a variety of LEDs. The entire product family can boost up to a very high voltage and is capable of driving an output up to 70W. The MIC3230/31 has an adjustable operating frequency from 10kHz to 1MHz and the MIC3232 has a fixed frequency operation of 400kHz to allow flexibility in the design. The MIC3231 features a dithering capability which can reduce EMI by up to 12dB. All three products feature PWM dimming capability, an enable pin for very low power shutdown, OVP, over temperature protection and UVLO.
High Bandwidth Solutions
GPON and GEPON ONU Transceiver -- Burst Mode Laser Driver With Integrated Post Amp, SY88236L/AL
The SY88236L/AL, a single supply 3.3V, 2.5Gbps integrated burst mode laser driver and post amplifier, targets GEPON and GPON ONU/ONT optical module applications. With excellent performance, and very fast transmit enable and disable time, the device is designed to be user-friendly, simple to implement, and cost-effective. The driver can deliver modulation current up to 85mA and bias current up to 70mA to support high launch transmit power. The device also features power monitoring functions, such as mod monitoring, bias monitoring, and RSSI. The post amplifier can detect signals with amplitude as low as 5mVpp and has the option to output either a Loss-of-Signal (LOS) or Signal-Detect (SD).
The SY88022L is a FP/DFB laser driver with data rates up to 11.3Gbps. It has a small form factor driver making it ideal for 8GFC/10GbE SFP+ optical module for high speed telecom/datacom applications. The driver can deliver modulation current up to 60mA and a bias current up to 80mA. The device features single 3.3V supply and comes in a small form factor 3mm x 3mm MLF® package.
The SY88024L is a VCSEL driver with data rates up to 11.3Gbps. It has a small form factor driver making it ideal for 8GFC/10GbE SFP+ optical module for high speed telecom/datacom applications. The driver can deliver modulation current up to 20mA and a bias current up to 20mA. The device features single 3.3V supply and comes in a small form factor 3mm x 3mm MLF® package.
The SY88053AL is a 12.5 limiting post amplifier designed for use in an 8GFC/10GbE SFP+ optical module for high speed telecom/datacom applications. Featuring a decision threshold control, the device can be used for offset compensation or to optimize the Bit Error Rate (BER) in noisy applications as WDM where optical amplifiers such as EDFAs and Raman amplifier are used. The solution connects to typical transimpedance amplifiers (TIAs). The signal from TIAs can contain significant amounts of noise unevenly distributed between its top and bottom rails due to the Amplified Spontaneous Emission (ASE) noise generated by the optical amplifiers.
Fiber Optic Module Controller With Internal Calibration, MIC3003
The MIC3003 is a fiber optic module controller that enables implementation of sophisticated, hot-pluggable fiber optic transceivers with intelligent laser control and an internally calibrated Digital Diagnostic Monitoring Interface per SFF-8472. This device integrates all the non-datapath functions of a SFP/SFP+ transceiver into a tiny 4mm x 4mm MLF® package and performs the role of a microcontroller peripheral in transponders or optical transceivers. The device also offers APC and numerous other features including interrupt, alarm and masking options, power-on hour meter, two-wire serial interface, and multi-part mode. This controller, in combination with Micrel laser driver, and post amplifier, provides customers with a total Micrel chipset solution that meets the industry's most stringent performance and cost objectives.