Electronics Weekly
- TCKE903NL clamps its output between 3.64 and 4.1V and latches off after tripping – cycling the enable pad re-starts it
- TCKE905ANA clamps its output between 5.4 and 6V and auto-tries after tripping
Although not regulators – they are designed to work fully-on – they voltage and current-limit the output, tripping only in potential failure conditions.
“Even if abnormal over-current or over-voltage is applied, the specified current and voltage can be maintained,” according to the company. “In addition, the products offer over-temperature and short-circuit protection, immediately shutting off when abnormal heat is generated or an unexpected short occurs.”
Like the rest of the family, their current limit can be set by a resistor to between 500mA and 4A.
Input operating range is 2.7 to 23V (25V abs max) and, when fully-conducting, the internal power rail mosfet saturates to 34mΩ.
At switch-on, output voltage rise-time can be limited by a capacitor connected to one of the package pads – packaging is 2 x 2mm WSON8 0.8mm tall.
“Toshiba intends to obtain IEC 62368-1 certification, the international safety standard for ICT and AV equipment,” the company added.
There are also family members which clamp their outputs at ~13.7 or ~22.2V, and all voltage types come in auto-retry or latch-off versions.
