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L6926

7

SYNC

Operating mode selector input. When high (higher than 1.3V) the Low Consumption Mode is

selected. When low (lower than 0.5V) the Low Noise Mode is selected. If connected with an

appropriate external synchronization signal (from 500KHz up to 1.4MHz) the internal

synchronization circuit is activated and the device works at the same switching frequency.

8

PGOOD

Power good comparator output. It is an open drain output. A pull-up resistor should be

connected between PGOOD and VOUT (or VCC depending on the requirements). The pin is

forced low when the output voltage is lower than 90% of the regulated output voltage and goes

high when the output voltage is greater than 90% of the regulated output voltage. If not used the

pin can be left floating.

Symbol

Parameter

Test Condition

Min

Typ

Max

Unit

Operating input voltage

After Turn on

2

5.5

V

Turn On threshold

2.2

V

Turn Off threshold

2

V

Hysteresis

100

mV

High side Ron

240

m

Ω

Low side Ron

215

m

Ω

Peak current limit

1.2

A

Valley current limit

1.4

A

Output voltage range

Vcc

V

Oscillator frequency

600

KHz

Sync mode clock (*)

500

1400

KHz

DC CHARACTERISTICS

Quiescent current (low noise

mode)

0.6V

230

µA

Quiescent current (low

cunsumption mode)

> 0.6V

25

µA

Shutdown current

0.2

µA

LX leakage current (*)

1

µA

1

µA

ERROR AMPLIFIER CHARACTERISTICS

Voltage feedback

0.593

0.6

0.607

V

Feedback input current (*)

25

nA

RUN

RUN threshold high

1.3

V

RUN threshold low

0.4

V

RUN input current (*)

25

nA

SYNC/MODE FUNCTION

Sync mode threshold high

1.3

V

Sync mode threshold low

0.5

V

PGOOD SECTION