L99VR01STR datasheet(4/47 Pages) STMICROELECTRONICS

Part #	L99VR01STR

Description	Automotive low dropout linear voltage regulator with configurable output voltage having 200 mA current capability

PDF	47 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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4 / 47 page

Figure 2. Functional block diagram of L99VR01J

Table 1. Pins description

Pin name

SO-8 pin

PowerSSO-12

Function

Supply voltage.

Block directly to ground with ceramic capacitor ≥ 4.7 µF and a 100 nF

capacitator as close as possible to the pin

SEL1

Output voltage selectors.

SEL2

SEL3

Advanced thermal warning output.

If the device detects a junction temperature above the warning

threshold, the pin is pulled low. If an overvoltage condition occurs, a

square wave is provided through the TW output. Leave floating if not

used.

IShort

Programmable short circuit output current input pin. A resistor between

Ishort pin and GND sets the short circuit output current value.

Enable input.

With the Enable high, regulator, watchdog and reset are operating.

With the Enable low, regulator, watchdog and reset are shutdown,

while the fast discharge circuit is turned on.

Connect the Enable to Vs to keep the device always enabled

GND

Ground reference.

VCW

Watchdog timer adjust.

A capacitor between VCW pin and GND sets the time response of the

watchdog monitor (just for L99VR01J).

L99VR01

Block diagram and pins description

DS13649 - Rev 3

page 4/47

L99VR01STR Datasheet(PDF) 4 Page - STMicroelectronics