UC3552中文资料PWM DC-DC CONVERTER WITH INTERNAL SWITCH AND SOFT-START数据手册UTC规格书

描述 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 usersflexibility 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 enhancedand facilitated by a high switching frequency of either 640 kHz or1.3MHz. As a power-smart design in shutdown mode a soft-start with an external capacitor that sets the input current ramp rate, reduces the current consumption to 0.1µA. A mere 2.6V input yields an impressive output voltage to 12V when operating.

特性 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