ST662AB, ST662AC

Description

Doc ID 5068 Rev 8

9/20

6

Description

The ST662 is an IC developed to provide a 12 V regulated output 30 mA from voltage input

as low as 4.75 without any inductors. It is useful for a wide range of applications and its

performances make it ideal for Flash memory programming supply.

An evaluation kit is provided to facilitate the application. This include a single-side demo

board designed for surface-mount components.The operating principle of ST662 (see

Figure 12) is to charge C1 and C2 capacitor by closing the S1 switch (while S2 is opened) at

is applied to the capacitor C4. This works as voltage triple. An amplifier error checks the

output voltage and blocks the oscillator if the output voltage is greater than 12 V. The

5 V to 0 V. Input logic levels of this input are CMOS compatible Applying a logic high at this

Figure 12.

Operating principle circuit