SP6126EK1-L

SP6126 Nov High-Voltage, Step Down Controller in TSOT6 FEATURES
Wide 4.5V – 29V Input Voltage Range
Internal Compensation
Built-in High Current PMOS Driver
Adjustable Overcurrent Protection
Internal soft-start
600kHz Constant Frequency Operation
0.6V Reference Voltage
1% output setpoint accuracy
Lead Free, RoHS Compliant Package: Small 6-Pin TSOT LX GND FB 6 5 4 SP6126 6 PinTSOT 1 2 VIN 3 GATE VDR DESCRIPTION The SP6126 is a PWM controlled step down (buck) voltage mode regulator with VIN feedforward and internal Type-II compensation. It operates from 4.5V to 29V making is suitable for 5V, 12V, and 24V applications. By using a PMOS driver, this device is capable of operating at 100% duty cycle. The high side driver is designed to drive the gate 5V below VIN. The programmable overcurrent protection is based on high-side MOSFET’s ON resistance sensing and allows setting the overcurrent protection value up to 300mV threshold (measured from VIN-LX). The SP6126 is available in a space-saving 6-pin TSOT package making it the smallest controller available capable of operating from 24VDC supplies. TYPICAL APPLICATION CIRCUIT VIN C1 10uF Q1 Si2343DS 12V 2 1 Gate GND Vin L1, IHLP-2525CZ 6.8uH, 60mOhm, 4.5A Rs=1k VOUT LX C7 0.1uF 6 SP6126 Ds MBRA340T3G 3 C4 22uF RZ 2K VDR 3.3V 0-2.0A R1 200k, 1% CZ 62pF 4 GND VFB GND R2 44.2k, 1% 5 D1 1N4148 SHDN High=Of f Nov07-08 RevG SP6126: TSOT-6 PFET Buck Controller 1  2008 Exar Corporation ABSOLUTE MAXIMUM RATINGS 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. Input Voltage….................................................-0.3V to 30V Lx………………………………………………….…-2V to 30V FB……………..................................................-0.3V to 5.5V Storage Temperature..………………...……-65 °C to 150 °C Junction Temperature...................................-40°C to 125°C Lead Temperature (Soldering, 10 sec)….….………..300 °C ESD Rating……….….…1kV LX, 2kV all other nodes, HBM ELECTRICAL SPECIFICATIONS Specifications are for TAMB=TJ=25°C, and those denoted by ♦ apply over the full operating range, -40°C< Tj