SLG55021 SLG55021-200010V TM GreenFET High Voltage Gate Driver Features Pin Configuration 5V 5% Power supply VCC 1 8 PG SLG55021 Drain Voltage Range 1.0V to 20V 7 ON 2 G Internal Gate Voltage Charge Pump 3 6 S SHDN Controlled Turn on Delay D GND 45 Controlled Load Discharge Rate Controlled Turn on Slew Rate TDFN-8 (Top View) Stable Slew Rate (2% typ) over Temperature Range TDFN-8 Package Applications Power Rail Switches Hot Plugging Applications Soft Switching Personal computers and Servers Data Communications Equipment Block Diagram CC D 1 D Q-PUMP 5 2 ON G + 7 SHDN 3 PG 8 Timing & Logic S 6 Discharge LOAD 4 G SLG55021 For N-MOSFETS with V < 20V GS Silego Technology, Inc. Rev 1.02 000-0055021-102 Revised September 21, 2016SLG55021-200010V Pin Description Pin Name Pin Number Type Pin Description VCC 1 Power Supply Voltage ON 2 Input CMOS Logic Level. High True SHDN 3 Input Shut Down - Low True Signal which immediately turns FET off GND 4 GND Ground D 5 Input FET Drain Connection S 6 Input Source Connection G 7 Output FET Gate Drive Output CMOS Open Drain - Power Good, indicates external FET PG 8 Output fully on Overview The SLG55021 N-Channel FET Gate Driver is used for controlling a delayed turn on and ramping slew rate of the source voltage on N-Channel FET switches from a CMOS logic level input. Intended as a supporting control element for switched voltage rails in energy efficient, advanced power management systems, the SLG55021 also integrates circuits to discharge opened switched voltage rails. The gate driver is available in a variety of configurations supporting a range of turn-on slew rates from 0.80V/ms up to 4V/ms which, depending on load supplying source voltages in the range of 1.0V to 20V results in ramp times from 200 s up to over 20ms (see Application Section). Delays until the ramp begins are source voltage independent and range from 250s to 5ms. A power good condition is output to indicate that the ramp-up slew of the source voltage is finished. Additionally, an internal discharge circuit provides a controlled path to remove charge from open power rails. The SLG55021 gate drive is packaged in an 8 pin DFN package. When used with external N-Channel FETs, the SLG55021 supports low transient, energy efficient switching of high current loads at source voltages ranging from 1.0V to 20V. Ordering Information Ramp Slew Discharge Rate Delay Time Resistor Part Number (Volts/ms) (ms) (ohms) Package Type SLG55021-200010V 2.0 0.15 200 TDFN-8 SLG55021-200010VTR 2.0 0.15 200 TDFN-8 - Tape and Reel (3k units) 000-0055021-102 Page 2 of 8