L9777C datasheet(8/25 Pages) STMICROELECTRONICS

Part #	L9777C

Description	Low power voltage regulator

PDF	25 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

8 / 25 page

Block diagrams and pins configuration

L9777

8/25

Doc ID 13496 Rev 2

TIMING

OPTION A & B: RESET filter time

External cap on this pin sets the delay time between NMI and

RESET output

OPTION C: not used and should be left floating or shorted to

ground.

VCC

Voltage regulator output

External cap CVCC

≥ 220 nF is needed to stabilize the regulator

VDD

Output regulated voltage switched on/off by VDD_EN pin.

External cap CVDD=100 nF is needed to stabilize the regulator

GND

Ground

RADJ

VCC under voltage Threshold Adjustment

By connecting this pin to an external resistor divider vs. VCC, is

possible to set the VCC under voltage threshold.

If this pin is connected to GND the under voltage threshold is set

by internal circuit.

Table 2.

Pin description (continued)

Pin#

I/O

Name

Function

L9777C Datasheet(PDF) 8 Page - STMicroelectronics