L6926D Ver la hoja de datos (PDF) - STMicroelectronics

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Fabricante

L6926D

HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR

STMicroelectronics 

L6926D

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

V6

Input voltage

V5

Output switching voltage

V1

Shutdown

V3

Feedback voltage

V2

Analog input voltage

Ptot Power dissipation at Tamb=70°C

Tj

Junction operating temperature range

Tstg Storage temperature range

LX Pin Maximum Withstanding Voltage Range Test Condition: CDF-

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

“Normal Performance’

PIN CONNECTION

RUN

COMP

VFB

GND

1

8

2

7

3

6

4

5

D01IN1239AMOD

PGOOD

SYNC

VCC

LX

Value

-0.3 to 6

-1 to VCC

-0.3 to VCC

-0.3 to VCC

-0.3 to VCC

0.45

-40 to 150

-65 to 150

±1000

±2000

Unit

V

V

V

V

V

W

°C

°C

V

V

THERMAL DATA

Symbol

Parameter

Rth j-amb Thermal Resistance Junction to Ambient

Value

180

Unit

°C/W

PIN FUNCTIONS

N

Name

1

RUN

2

COMP

3

VFB

4

GND

5

LX

6

VCC

7

SYNC

8

PGOOD

Description

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.

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

220pF capacitor is enough to guarantee the loop stability.

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.

Ground.

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

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.

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.

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.

2/8

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