DESCRIPTION

The UTC UC3552 is a step-up PWM DC-DC converter with a internal switch which is 1.6A, 0.23Ω. UTC UC3552 offers users flexibility in determining loop dynamics and adjusting operating frequency cause it’s equipped with an external compensation pin ,and it also allows the use of small, low equivalent resistance (ESR) ceramic output capacitors. UTC UC3552 is capable of

converting a standard input of 3.3V to multiple outputs of 8V, − 8V , and 23V. Otherwise, filtering and loop performance are enhanced and facilitated by a high switching frequency of either 640 kHz or 1.3MHz.

FEATURES

* 1.6A, 0.23Ω, internal switch

* High efficiency: 90%

* Adjustable output: VDD to 12V

* Adjustable frequency: 640kHz or 1.3MHz

* Wide input range: +2.6V ~ +5.5V

* Low shutdown current: 0.1µA

* Programmable soft-start