L6928D

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Table 2. Absolute Maximum Ratings

Figure 3. Pin Connection

Table 3. Thermal Data

Table 4. Pin Functions

Symbol

Parameter

Value

Unit

Input voltage

-0.3 to 6

V

Output switching voltage

V

Shutdown

V

Feedback voltage

V

Error amplifier output voltage

V

PGOOD

V

Synchronization mode selector

V

Ptot

Power dissipation at Tamb=70

°C0.45

W

Tj

Junction operating temperature range

-40 to 150

°C

Tstg

Storage temperature range

-65 to 150

°C

LX Pin

Maximum Withstanding Voltage Range Test Condition: CDF-

AEC-Q100-002- “Human Body Model” Acceptance Criteria:

“Normal Performance’

±1000

V

Other pins

±2000

V

Symbol

Parameter

Value

Unit

Thermal Resistance Junction to Ambient

180

°C/W

N

Name

Description

1

RUN

Shutdown input. When connected to a low level (lower than 0.4V) the device stops working.

When high (higher than 1.3V) the device is enabled.

2

COMP

Error amplifier output. A compensation network has to be connected to this pin. Usually a

220pF capacitor is enough to guarantee the loop stability.

3

VFB

Error amplifier inverting input. The output voltage can be adjusted from 0.6V up to the input

voltage by connecting this pin to an external resistor divider.

4

GND

Ground.

5

LX

Switch output node. This pin is internally connected to the drain of the internal switches.

6

VCC

Input voltage. The start up input voltage is 2.2V (typ) while the operating input voltage range is

from 2V to 5.5V. An internal UVLO circuit realizes a 100mV (typ.) hysteresis.

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 1MHz up to 2MHz) 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.

RUN

COMP

VFB

GND

1

3

2

4LX

SYNC

PGOOD

8

7

6

5

D01IN1239AMOD