TPS61042 datasheet(3/20 Pages) TI

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TPS61042

SLVS441B — DECEMBER 2002 — REVISED JANUARY 2003

ELECTRICAL CHARACTERISTICS

I = 3.6 V, CTRL= VI, TA = -40°C to + 85°C, typical values are at TA= 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Supply current

Input voltage range

1.8

6.0

I(Q)

Operating quiescent current into VIN

IO =0 mA, not switching

µA

IO(sd)

Shutdown current

CTRL=GND

0.1

µA

VUVLO

Under-voltage lockout threshold

VI falling

1.5

1.7

CTRL

VIH

CTRL high level input voltage

1.3

VIL

CTRL low level input voltage

0.3

IIkg

CTRL input leakage current

CTRL=GND or VIN

0.1

µA

ton

Minimim CTRL pulse witdh to enable

CTRL=low to high

500

toff

Minimum CTRL pulse width to disable

CTRL=high to low

f(CTRL)

PWM switching frequency applied to

0.1

kHz

CTRL

D(CTRL)

PWM duty cycle applied to CTRL

100

Power switch and current limit (SW)

Maximum switch voltage

rds(ON)

MOSFET on-resistance

VI=3.6 V; I(SW)=200 mA

300

600

Ω

Ilkg

MOSFET leakage current

V(SW)=28 V

0.1

µA

ILIM

MOFSET current limit

400

500

600

LED switch and current limit (LED)

Maximum switch voltage

rds(ON)

MOSFET on-resistance

VI=3.6 V; IS =20 mA

Ω

Ilkg

MOSFET leakage current

V(LED)=28 V

0.1

µA

Output

Output voltage range

27.5

I(FB)

Feedback input bias current (1)

V(FB) =0.252 V

100

VFB

Feedback trip point voltage

1.8 V

≤ V

I≤ 6.0 V

244

252

260

V(OVP)

Output overvoltage protection

VO rising

27.5

Vhys(OVP) Output overvoltage protection hysteresis

I(OVP)

OVP input current

VO=15 V

µA

(1)

The feedback input is high impedance MOSFET Gate input.

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