SP6132HEU

The SP6132HEU is one member of the SP6132H series.The SP6132H is a synchronous step-down switching regulator controller optimized for high efficiency.The part is designed to be especially attractive for dual supply, 12V step down with 5V used to power the controller.This lower VCC voltage minimizes power dissipation in the part.The SP6132H is designed to drive a pair of external NFETs using a fixed 300kHz frequency, PWM voltage mode architecture.Protection features include UVLO, thermal shutdown and output short circuit protection.The SP6132H is available in the cost and space saving 10-pin MSOP.

Features of the SP6132HEU are:(1)3V to 28V step down achieved using dual input; (2)2A to 15A ouput capability; (3)highly integrated design, minimal components; (4)UVLO detects both VCC and VIN; (5)short circuit protection with auto-restart; (6)on-board 1.5 sink (2 source) NFET drivers; (7)wide bw amp allows type II or III compensation; (8)programmable soft start; (9)fast transient response; (10)high efficiency: greater than 95% Possible; (11)a synchronous start-up into a pre-charged output; (12)small 10-pin MSOP package.

The absolute maximum ratings of the SP6132HEU can be summarized as:(1)Vcc:7 V;(2)BST:33V;(3)storage temperature:-65 to 150;(4)lead temperature (soldering 5s):300;(5)power dissipation:1W.These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied.Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.The heart of the SP6132H is a wide bandwidth transconductance amplifier designed to accommodate Type II and Type III compensation schemes. A precision 0.8V reference present on the positive terminal of the error amplifier permits the programming of the output voltage down to 0.8V via the VFB pin. The output of the error amplifier, COMP, compared to a 1.1V peak-to-peak ramp is responsible for trailing edge PWM control. This voltage ramp and PWM control logic are governed by the internal oscillator that accurately sets the PWM frequency to 300kHz.