ACT8828 datasheet(17/49 Pages) ACTIVE-SEMI

17 / 49 page

STEP-DOWN DC/DC CONVERTERS

ACT8828

Rev 3, 24-Sep-09

Active-Semi

Innovative Power

- 17 -

www.active-semi.com

ActivePMU

TM and ActivePathTM are trademarks of Active-Semi.

2CTM is a trademark of Philips Electronics.

(VVSYS = 3.6V, TA = 25°C, unless otherwise specified.)

: VNOM1 refers to the nominal output voltage level for VOUT1 as defined by the Ordering Information section.

ELECTRICAL CHARACTERISTICS (REG1)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VP1 Operating Voltage Range

2.9

5.5

VP1 UVLO Threshold

Input Voltage Rising

2.7

2.8

2.9

VP1 UVLO Hysteresis

Input Voltage Falling

Standby Supply Current

130

200

µA

Shutdown Supply Current

REG1 is disabled, VVP1 = 4.2V

0.1

µA

Output Voltage Regulation Accuracy

VNOM1 < 1.5V, IOUT1 = 10mA

-2.1%

VNOM1

+2.1%

VNOM1 ≥ 1.5V, IOUT1 = 10mA

-1.5%

VNOM1

+1.5%

Line Regulation

VVP1 = Max(VNOM1 + 1V, 3.2V) to 5.5V

0.15

%/V

Load Regulation

IOUT1 = 10mA to 1.3A

0.0017

%/mA

Current Limit

1.4

1.8

Oscillator Frequency

VOUT1 ≥ 20% of VNOM1

1.35

1.6

1.85

MHz

VOUT1 = 0V

540

kHz

PMOS On-Resistance

ISW1 = -100mA

0.16

0.24

Ω

NMOS On-Resistance

ISW1 = 100mA

0.16

0.24

Ω

SW1 Leakage Current

VVP1 = 5.5V, VSW1 = 5.5V or 0V

µA

Power Good Threshold

%VNOM1

Minimum On-Time

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