AN2833 datasheet(14/32 Pages) STMICROELECTRONICS

Part #	AN2833

Description	Dual step-down controller with auxiliary voltages for industrial system power

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

14 / 32 page

Quick start

AN2833

14/32

Quick start

Connect VIN+ and VIN- test points of the demonstration board to an external power

supply

Ensure that all switches of DIP-switch "S2" are "OFF". In this condition all outputs are

disabled (shutdown mode)

Turn "S21" on (SHDN pin high). The LDO5 and LDO_ADJ outputs are turned on

(standby mode)

Turn "S22" on (EN1 pin high). The 1.5 V switching controller brings its output in

regulation. PGood1 pin goes high after the soft-start

Turn "S23" on (EN2 pin high). The 1.05 V switching controller brings its output in

regulation. PGood2 pin goes high after the soft-start

In order to load the switching outputs, loads must be connected between the "+" and

the "-" output test points

In order to load the LDO5 linear output, loads must be connected between J10 and

LDO5 or resistor RLD5V can be mounted on the demonstration board

In order to load the LDO_ADJ linear output, loads must be connected between J10 and

LDO_ADJ or the alternative resistor R33 can be mounted on the demonstration board

AN2833 Datasheet(PDF) 14 Page - STMicroelectronics