LM27403SQE datasheet(11/49 Pages) TI

Il numero della parte	LM27403SQE

Spiegazioni elettronici	Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown

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Produttore elettronici	TI [Texas Instruments]

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VOUT

PGOOD

SS/TRACK

91% VOUT

EN to SS delay

UVLO/EN

VIN = 12 V

VOUT = 1.2 V

IOUT = 0 A

FSW = 300 kHz

VOUT

PGOOD

SS/TRACK

91% VOUT

EN to SS delay

UVLO/EN

VIN = 12 V

VOUT = 1.2 V

IOUT = 0 A

FSW = 300 kHz

VOUT

IOUT

VIN = 12 V

VOUT = 1.2 V

IOUT = 0 A ± 10 A ± 0 A

FSW = 300 kHz

0

20

40

60

80

100

200

400

600

800

1000

1200

Switching Frequency (kHz)

C015

2

4

6

8

10

12

14

0.0

0.2

0.4

0.6

0.8

1.0

V

IN ± VCS- (V)

-40°C

25°C

125°C

C013

V

OUT = 3.3V

28

28.2

28.4

28.6

28.8

29

-50

-25

0

25

50

75

100

125

Temperature (

SC)

C014

LM27403

www.ti.com

SNVS896 A – AUGUST 2013 – REVISED SEPTEMBER 2013

TYPICAL CHARACTERISTICS (continued)

Unless otherwise stated, all datasheet curves were recorded using the circuit and powertrain designated Design 1 in the

DESIGN EXAMPLES section with input and output voltages of 12 V and 1.2 V, respectively.

Figure 14. CS– Current Source Compliance Voltage

Figure 15. Current Limit Inception vs. Temperature

Figure 16. Switching Frequency vs. Frequency Adjust

Figure 17. 10-A Step Load Transient Response, 2.5-A/µs

Resistance

Slew Rate

Figure 18. Startup Characteristic

Figure 19. Prebias Startup Characteristic

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