UC3552

UNISONIC TECHNOLOGIES CO., LTD UC3552 PWM DC-DC CONVERTER WITH INTERNAL SWITCH AND SOFT-START  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 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.  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  ORDERING INFORMATION Ordering Number UC3552G-S08-R UC3552G-SM1-R Package SOP-8 MSOP-8 CMOS IC Packing Tape Reel Tape Reel www.unisonic.com.tw Copyright © 2016 Unisonic Technologies Co., Ltd 1 of 7 QW-R502-134.C UC3552  MARKING  PIN CONFIGURATION CMOS IC  PIN DESCRIPTION PIN NO. PIN NAME 1 EO 2 IN 3 SHDN 4 GND 5 SW 6 VDD 7 FREQ 8 SS ...