FX003 datasheet(4/38 Pages) TI2

4 / 38 page

TPS51219

SLUSAG1B

– MARCH 2011 – REVISED OCTOBER 2011

www.ti.com

ELECTRICAL CHARACTERISTICS

over operating free-air temperature range, VV5 = 5 V, VMODE= 0 V, VEN= 5 V (unless otherwise noted)

PARAMETER

TEST CONDITION

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

IV5

V5 supply current

TA = 25°C, No load, VEN = 5 V

560

μA

IV5SDN

V5 shutdown current

TA = 25°C, No load, VEN = 0 V

0.5

2.0

μA

VREF OUTPUT

VVREF

Output voltage

IVREF = 0 μA wrt GSNS

2.000

μA ≤ IVREF < 30 μA, TA = 0°C to 85°C

-0.8%

0.8%

VVREF(tol)

Output voltage tolerance

μA ≤ IVREF < 300 μA, TA = –40°C to 85°C

-1.2%

1.2%

IVREF(ocl)

Current limit

VVREF-GSNS = 1.7 V

0.4

1.0

OUTPUT VOLTAGE

VREFIN = 0 V

1.000

VVSNS

VSNS sense voltage

VREFIN = 3.3 V

1.050

0.5 V

≤ VREFIN ≤ 2 V

VREFIN

VREFIN = 0 V, 0°C ≤ TA ≤ 85°C

–9

VREFIN = 0 V, -40°C ≤ TA ≤ 85°C

-14

VVSNS(tol)

VSNS regulation voltage tolerance

VREFIN = 3.3 V, 0°C ≤ TA ≤ 85°C

–9

VREFIN = 3.3 V, -40°C ≤ TA ≤ 85°C

-14

VREFIN = 0.5 V and VREFIN = 2.0 V

-5

VREFIN1

REFIN voltage for 1.00-V output

0.3

VREFIN1P05

REFIN voltage for 1.05-V output

2.2

VOFF_LPCMP

Loop comparator offset voltage

VREFIN = 1 V, VSNS shorted to COMP

-5

VREFIN = 0 V, VVSNS = 0.95 V

0.885

VCOMPCLP

COMP clamp voltage

VREFIN = 0 V, VVSNS = 1.05 V

1.115

Error amplifier transconductance

VREFIN = 0 V

130

μS

IVSNS

VSNS input current

VVSNS = 1.05 V

-1

μA

IREFIN

REFIN input current

VREFIN = 0 V

–1

μA

IVSNS(dis)

VSNS discharge current

VEN = 0 V, VVSNS = 0.5 V

SWITCH MODE POWER SUPPLY (SMPS) FREQUENCY

VIN = 12 V, VVSNS = 1.8 V, VMODE = 2.5 V

400

VIN = 12 V, VVSNS = 1.8 V, VMODE = 1.67 V

300

fSW

Switching frequency

kHz

VIN = 12 V, VVSNS = 1.8 V, VMODE = 0.2 V

670

VIN = 12 V, VVSNS = 1.8 V, VMODE = 0.033 V

500

tON(min)

Minimum on time

DH rising to falling(1)

tOFF(min)

Minimum off time

DH falling to rising

320

MOSFET DRIVERS

Source, IDH = –50 mA

1.6

3.0

RDH

DH resistance

Sink, IDH = 50 mA

0.6

1.5

Source, IDL = –50 mA

0.9

2.0

RDL

DL resistance

Sink, IDL = 50 mA

0.5

1.2

DH-off to DL-on

tDEAD

Dead time

DL-off to DH-on

INTERNAL BOOT STRAP SWITCH

VFBST

Forward voltage

VV5-BST, TA = 25°C, IF = 10 mA

0.1

0.2

IBSTLK

BST leakage current

TA = 25°C, VBST = 33 V, VSW = 28 V

0.01

1.5

μA

(1)

Ensured by design. Not production tested.

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