LED7707 datasheet(9/48 Pages) STMICROELECTRONICS

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LED7707

Electrical characteristics

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Electrical characteristics

Table 6.

Electrical characteristics

(VIN = 12 V; TA = 0 °C to 85 °C and LDO5 connected to AVCC if not otherwise specified)

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Supply section

VLDO5

LDO output and IC supply

voltage

EN high

ILDO5 = 0 mA

4.4

5.5

VAVCC

IIN,Q

Operating quiescent current

RRILIM = 51 kΩ, RBILIM = 220 kΩ,

RSLOPE = 680 kΩ

DIM tied to SGND.

1mA

IIN,SHDN

Operating current in shutdown

EN low

μA

VUVLO,ON

LDO5 under voltage lock out

upper threshold

4.0

4.2

4.4

VUVLO,OFF

LDO5 under voltage lock out

lower threshold

3.7

3.8

3.9

LDO linear regulator

Line regulation

6 V

≤ V

IN ≤ 28 V, ILDO5 = 30 mA

LDO dropout voltage

ILDO5 = 10 mA (-10 % drop)

120

LDO maximum output current

VLDO5 > VUVLO,ON

VLDO5 < VUVLO,OFF

Boost section

tON,min

Minimum switching on-time

200

fSW

Default switching frequency

FSW connected to AVCC

570

660

750

kHz

Adjustable switching frequency

250

1000

Minimum FSW sync frequency

220

FSW sync input threshold

240

300

FSW sync input hysteresis

FSW sync input duty-cycle

FSW connected to AVCC

(Internal oscillator selected)

FSW sync min ON time

270

SYNC output duty-cycle

FSW connected to AVCC

(Internal oscillator selected)

SYNC output high level

ISYNC = 10 μA

VAVCC

-20V

SYNC output low level

ISYNC = -10 μA

Power switch

LX current coefficient

RBILIM = 300 kΩ

1E6

1.2E6

1.4E6

RDS(on)

Internal MOSFET on-resistance

280

500

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