TPS5120_15 datasheet(9/24 Pages) TI

Part #	TPS5120

Description	DUAL OUTPUT,TWO-PHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

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Manufacturer	TI [Texas Instruments]

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TPS5120

DUAL OUTPUT, TWOPHASE SYNCHRONOUS BUCK DC/DC CONTROLLER

SLVS278E – AUGUST 2000 – REVISED MARCH 2003

9

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

electrical characteristics over recommended free-air temperature range, VCC = 7 V (unless

otherwise noted)

reference voltage

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Vref

Reference voltage

0.85

V

TA = 25°C,

I = 50

µA

–1%

1%

Vref(tol) Reference voltage tolerance

TA = –20°C to 85°C,

I = 50

µA

–1.5%

1.5%

Vref(tol) Reference voltage tolerance

TA = –40°C to 85°C,

I = 50

µA

–2%

2%

R(egin)

Line regulation

VCC = 4.5 V to 28 V,

I = 50

µA

0.05

3

mV

R(egl)

Load regulation

I = 0.1

µA to 1 mA

0.15

5

mV

oscillator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

fosc

Frequency

PWM mode,

CT = 44 pF,

TA = 25 °C

300

kHz

V

High le el o tp t oltage

DC

1

1.1

1.2

V

VOH

High level output voltage

fosc = 300 kHz

1.17

V

Lo

le el o tp t oltage

DC

0.4

0.5

0.6

V

VOL

Low level output voltage

fosc = 300 kHz

0.43

V

error amplifier

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIO

Input offset voltage

TA = 25°C

2

10

mV

Open-loop voltage gain

50

dB

Unity-gain bandwidth

2.5

MHz

I(snk)

Output sink current

VO = 1 V

0.3

0.7

mA

I(src)

Output source current

VO = 1 V

0.2

0.9

mA

skip comparator

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Vhys

Hysteresis window

SKIP mode

9

mV

duty control

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DUTY

Maximum duty cycle

300 kHz,

VI = 0 V

83%

control

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V

High le el inp t oltage

STBY1, STBY2

2.2

V

VIH

High-level input voltage

PWM/SKIP, 5V_STBY

2.2

V

Lo

le el inp t oltage

STBY1, STBY2

0.3

V

VIL

Low-level input voltage

PWM/SKIP, 5V_STBY

0.3

V

5-V internal switch

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

V(TO_H)

Threshold

4.2

4.8

V

V(TO_L)

Threshold

4.1

4.7

V

Vhys

Hysteresis

30

200

mV

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