Cherry Manuals

The CS51311 is a synchronous dual NFET Buck Regulator Controller. It is designed to power the core logic of the latest high performance CPUs. It uses the V2TM control method to achieve the fastest possible transient response and best overall regulation. It incorporates many additional features required to ensure the proper operation and protection of the CPU and Power system. The CS51311 provides the industry’s most highly integrated solution, minimizing external component count, total system cost and BOM, and improving reliability.

This document is the datasheet of CS5124/6 DC-DC converter, which introduces the features, applications, pin definition of the model.

The CS51221 fixed frequency feed forward voltage mode PWM controller contains all of the features necessary for basic voltage mode operation. This PWM controller has been opti- mized for high frequency prima- ry side control operation. In addition, this device includes such features as: Soft Start, accu- rate duty cycle limit control, less than 50µA startup current, over and under voltage protection, and bidirectional synchroniza- tion. The CS51221 is available in 16 lead PDIP and SO narrow surface mount pa

CS5112 is a 1.4A switching regulator with a 5V, 100mA linear regulator, watchdog, reset, and enable

The CS5111 is a dual output power management integrated circuit that includes a 5V ±2%, 100mA linear regulator, a watchdog timer, a linear output voltage monitor to provide a Power On Reset (POR) and a 1.4A current mode PWM switching regulator. The 5V linear regulator is comprised of an error amplifier, reference, and supervisory functions. It has low internal supply current consumption and provides 1.2V (typical) dropout voltage at maximum load current. The watchdog timer circuitry monitors an input signal (WDI) from the microprocessor. It responds to the falling edge of the WDI signal and restarts the device within 250ms. The CS5111 has a 54V peak transient capability to protect the load during a power failure.

The CS5106 is a fixed-frequency, current-mode controller with one single NFET driver and one dual FET, synchronous driver. The synchronous driver allows for increased efficiency of the main isolated power stage and the single driver allows the designer to develop auxiliary supplies for controller power as well as secondary side housekeeping. In addition, because the synchronous drivers have programmable FET non-overlap, the CS5106 is an ideal controller for soft-switched converter topologies. The CS5106 is specifically designed for isolated topologies where the main switch and auxiliary switch operate on different clock phases.

CS51033 is a switching controller for use in DC-DC converters. It can be used in the buck topology and features a high-speed oscillator that does not require compensation, lossless short circuit protection, 2% precision reference, and programmable soft start.

CS51031 is a switching controller for use in DC-DC converters. It can be used in the buck topology with a minimum number of external components. The CS51031 consists of a VCC monitor for controlling the state of the device, 1.0A power driver for controlling the gate of a discrete P-channel transistor, fixed frequency oscillator, short circuit protection timer, programmable soft start, precision reference, fast output voltage monitoring comparator, and output stage driver logic with latch. The high frequency oscillator allows the use of small inductors and output capacitors, minimizing PC board area and systems cost. The programmable soft start reduces current surges at start up. The short circuit protection timer significantly reduces the duty cycle to approximately 1/30 of its cycle during short circuit conditions. The CS51031 is available in 8L SO and 8L PDIP plastic packages.

The document introduces CS51021/22/23/24 series fixed frequency PWM current mode controller, which has low startup current (75µA), high frequency operation capability, overvoltage and undervoltage monitoring, programmable dual threshold overcurrent protection, current sense leading edge blanking, current slope compensation, accurate duty cycle control and an externally available 5V reference. The series controller has bidirectional synchronization function, CS51021 and CS51023 provide sleep mode, with maximum IC current consumption of 100µA. The series controller uses a 16-lead narrow body SO package.

The CS3361 integral alternator regulator integrated circuit provides the voltage regulation for automotive, 3-phase alternators. It drives an external logic level N channel enhancement power FET for control of the alternator field current. In the event of a charge fault, a lamp output pin is provided to drive an external darlington transistor capable of switching on a fault indicator lamp. An overvoltage or no Stator signal condition activates the lamp output. The CS3361 is available in a 14 lead SO package.

CS51221 is a fixed frequency, feed forward voltage mode PWM controller from Cherry Semiconductor Corporation that contains all of the features necessary for basic voltage mode operation. This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes features such as: Soft Start, accurate duty cycle limit control, less than 50µA startup current, over and under voltage protection, and bidirectional synchronization. The CS51221 is available in 16 lead PDIP and SO narrow surface mount packages.

This document describes CS8135, a low dropout, high current, dual 5V linear regulator. It features two adjustable output voltages, with the primary output at 5V and the standby output at 5V/10mA. The CS8135 has low dropout voltage, ON/OFF control option, low quiescent drain, RESET option, and various protection features.