L6911 datasheet(2/7 Pages) STMICROELECTRONICS

2 / 7 page

(DAC) allows to adjust the output voltage from

1.3V to 2.05V with 0.05V binary steps and from

2.1V to 3.5V with 0.1V binary steps. The high pre-

cision internal reference, digitally trimmed, as-

sures the selected output voltage to within +/-1%.

Thanks to the window comparator system, the de-

vice provides excellent load transient perform-

ance. The high peak current gate drive affords to

have fast switching to the external power mos,

performing an high efficiency. The L6911B as-

sures a fast protection against load overvoltage

and load overcurrent. An external SCR is trig-

gered to crowbar the input supply in case of over-

voltage. In case of output short circuit the soft

start capacitor is discharged and the system

works in hiccup mode.

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

VCC

VCC to PGND

VBOOT-VPHASE

Boot Voltage

Input, Output or I/O Voltage

-0.3 to VCC+0.3

THERMAL DATA

Symbol

Parameter

Value

Unit

Rthj-amb

Thermal Resistance Junction to Ambient

110

°C/W

Tmax

Maximum Junction Temperature

150

°C

Tstg

Storage Temperature Range

-65 to 150

°C

RECOMMENDED OPERATING CONDITION

Symbol

Parameter

Value

Unit

VCC

VCC to PGND

±10%/12V ±10%

Tamb

Ambient Temperature Range

0 to 70

°C

Junction Temperature Range

0 to 125

°C

DESCRIPTION (continued)

PGND

PHASE

GND

VFB

LGATE

BOOT

UGATE

VCC

OCSET

VCC 12V

Vin 5V

1.8V to 3.5V

PGOOD

COMP

VSEN

OVP

VD0

VD1

VD2

VD3

VD4

MONITOR and

PROTECTION

OSC

D/A

E/A

PWM

D98IN957A

BLOCK DIAGRAM

L6911B

2/7

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