L5973D013TR Datasheet L5973D013TR, L5973D, EVAL5973D | P10-P12

Application circuit L5973D

10/17

Figure 13. PCB layout (component side)

Figure 14. PCB layout (bottom side)

Figure 15. PCB layout (front side)

Below some graphs show the T

versus output current in different conditions of the input and

output voltage and some efficiency measurements.

L5973D Application ideas

11/17

6 Application ideas

Figure 16. Positive buck-boost regulator

Figure 17. Buck-boost regulator

Figure 18. Dual output voltage with auxiliary winding

Application ideas L5973D

12/17

When an output voltage below the internal reference (1.235 V) is required, the circuit

reported in the figure 18 can been used. In this case the minimum voltage reachable is 0.6 V

and can be easily calculated with the following formula:

OUT

= V

- [(V

REF

- V

)x(R

/ R

)]

If the load is not present, a resistor connected between V

OUT

and GND is required in order

to avoid that the voltage across C

OUT

increases.

The value of this resistor has to be calculated taking into account that the current flowing

through this resistance has to be higher than the current flowing through R

Figure 19. Output voltage below the 1.235 V internal voltage reference

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P17

L5973D013TR

Mfr. #:

Buy L5973D013TR

Manufacturer:

STMicroelectronics

Description:

Switching Voltage Regulators 2.5 A Step-DN Switching Reg

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

L5973D013TR

L5973D013TR

Products related to this Datasheet