FX021 datasheet(3/20 Pages) TI1

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CSD97374Q4M

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SLPS382C – JANUARY 2013 – REVISED JULY 2013

ELECTRICAL CHARACTERISTICS

TA = 25°C, VDD = POR to 5.5V (unless otherwise noted)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

PLOSS

VIN = 12V, VDD = 5V, VOUT = 1.8V, IOUT = 15A,

Power Loss(1)

2.3

fSW = 500kHz, LOUT = 0.29µH , TJ = 25°C

VIN = 19V, VDD = 5V, VOUT = 1.8V, IOUT = 15A,

Power Loss(2)

2.5

fSW = 500kHz, LOUT = 0.29µH , TJ = 25°C

VIN = 19V, VDD = 5V, VOUT = 1.8V, IOUT = 15A,

Power Loss(2)

2.8

fSW = 500kHz, LOUT = 0.29µH , TJ = 125°C

VIN

VIN Quiescent Current, IQ

PWM=Floating, VDD = 5V, VIN= 24V

µA

VDD

PWM = Float, SKIP# = VDD or 0V

130

µA

Standby Supply Current, IDD

SKIP# = Float

µA

Operating Supply Current, IDD

PWM = 50% Duty cycle, fSW = 500kHz

8.2

POWER-ON RESET AND UNDER VOLTAGE LOCKOUT

Power-On Reset, VDD Rising

4.15

UVLO, VDD Falling

3.7

Hysteresis

0.2

PWM and SKIP# I/O Specifications

Pull Up to VDD

1700

Input Impedance, RI

Pull Down (to GND)

800

Logic Level High, VIH

2.65

Logic Level Low, VIL

0.6

Hysteresis, VIH

0.2

Tri-State Voltage, VTS

1.3

Tri-state Activation Time (falling) PWM,

tTHOLD(off1)

Tri-state Activation Time (rising) PWM,

tTHOLD(off2)

Tri-state Activation Time (falling) SKIP#,

tTSKF

µs

Tri-state Activation Time (rising) SKIP#,

tTSKR

Tri-state Exit Time PWM, t3RD(PWM)

(2)

100

Tri-state Exit Time SKIP#, t3RD(SKIP#)

(2)

µs

BOOTSTRAP SWITCH

Forward Voltage, VFBST

IF = 10mA

120

240

Reverse Leakage, IRLEAK

(2)

VBST – VDD = 25V

µA

(1)

Measurement made with six 10-µF (TDK C3216X5R1C106KT or equivalent) ceramic capacitors placed across VIN to PGND pins.

(2)

Specified by design

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