L5973 Просмотр технического описания (PDF) - STMicroelectronics

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производитель

L5973

2.5A SWITCH STEP DOWN SWITCHING REGULATOR

STMicroelectronics 

L5973D

PIN CONNECTION

OUT

SYNC

INH

COMP

1

8

2

7

3

6

4

5

D98IN955

VCC

GND

VREF

FB

PIN DESCRIPTION

N°

Pin

Function

1

OUT Regulator Output.

2

SYNC Master/slave synchronization.

3

INH A logical signal (active high) disables the device. If INH not used the pin must be grounded.

When it is open an internal pull-up disable the device.

4

COMP E/A output for frequency compensation.

5

FB Feedback input. Connecting directly to this pin results in an output voltage of 1.23V. An external

resistive divider is required for higher output voltages.

6

VREF 3.3V VREF. No cap is requested for stability.

7

GND Ground.

8

VCC Unregulated DC input voltage.

THERMAL DATA

Symbol

Parameter

Rth (j-amb) Thermal Resistance Junction to ambient

(*) Package mounted on board

Max.

Value

40 (*)

Unit

°C/W

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

V8

Input Voltage

V1

Output DC voltage

Output peak voltage at t = 0.1µs

I1

Maximum output current

V4, V5 Analog pins

V3

INH

V2

SYNC

Ptot

Power dissipation at Tamb ≤ 60°C

Tj

Operating junction temperature range

Tstg

Storage temperature range

Value

Unit

40

V

-1 to 40

V

-5 to 40

V

int. limit.

4

V

-0.3V to VCC

-0.3 to 4

V

2.25

W

-40 to 150

°C

-55 to 150

°C

2/10

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