TPS54292 datasheet(4/35 Pages) TI1

Part #	TPS54292

Description	1.5-A/2.5-A Dual, Fully-Synchronous Buck Converter With Integrated MOSFET

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Manufacturer	TI1 [Texas Instruments]

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TPS54290, TPS54291, TPS54292

SLUS973 – OCTOBER 2009

www.ti.com

ELECTRICAL CHARACTERISTICS (continued)

TJ = –40°C to 125°C, PVDD1 and 2 = 12V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

BOOTSTRAP (Applied to both channels)

RBOOT

Bootstrap switch resistance

R(BP to BOOT), I external = 10 mA

33

Ω

PGOOD

VUV

Feedback voltage limit for PGOOD

660

730

mV

VPG-HYST

(3)

PGOOD hysteresis voltage on FB

40

mV

OUTPUT STAGE (Applied to both channels)

On resistance of high-side FET

RDS(on1)(HS)

(3)

170

265

m

Ω

and bondwire on CH1

On resistance of high-side FET

RDS(on2)(HS)

(3)

120

190

m

Ω

and bondwire on CH2

On resistance of low-side FET and

m

Ω

RDS(on1)(LS)

(3)

120

190

bondwire on CH1

On resistance of low-side FET and

RDS(on2)(LS)

(3)

90

150

m

Ω

bondwire on CH2

tON_MIN

(3)

Miimum controllable pulse width

150

ns

Minimum duty

VFB = 0.9 V

0%

cycle

HDRV off to LDRV on

20

ns

tDEAD

(3)

Output driver dead time

LDRV off to HDRV on

20

ns

TPS54290

90%

96%

DMAX

Maximum duty cycle

TPS54291

85%

91%

TPS54292

78%

82%

THERMAL SHUTDOWN

TSD

(3)

Shutdown temperature

145

°C

TSD_HYS

(3)

Hysteresis

20

°C

(3)

Specified by design. Not tested in production.

4

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