ACT8325 datasheet(7/11 Pages) ACTIVE-SEMI

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ACT8325

Rev0, 13-May-08

STEP-DOWN DC/DC CONVERTER

Active-Semi

Innovative Power

- 7 -

www.active-semi.com

ActivePMU

TM is a trademark of Active-Semi.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VP2 Operating Voltage Range

3.1

5.5

VP2 UVLO Threshold

Input Voltage Rising

2.9

3.1

VP2 UVLO Hysteresis

Input Voltage Falling

Standby Supply Current

130

200

µA

Shutdown Supply Current

ON2 = GA, VVP2 = 4.2V

0.1

µA

Output Voltage Regulation Accuracy

VNOM2 < 1.3V, IOUT2 = 10mA

-2.4%

VNOM2

+1.8%

VNOM2 ≥ 1.3V, IOUT2 = 10mA

-1.2%

VNOM2

+1.8%

Line Regulation

VVP2 = Max(VNOM2 + 1V, 3.2V) to 5.5V

0.15

%/V

Load Regulation

IOUT2 = 10mA to 550mA

0.0017

%/mA

Current Limit

0.65

0.85

Oscillator Frequency

VOUT2 ≥ 20% of VNOM2

1.35

1.6

1.85

MHz

VOUT2 = 0V

530

kHz

PMOS On-Resistance

ISW2 = -100mA

0.40

0.68

Ω

NMOS On-Resistance

ISW2 = 100mA

0.27

0.46

Ω

SW2 Leakage Current

VVP2 = 5.5V, VSW2 = 5.5V or 0V

µA

Power Good Threshold

%VNOM2

Minimum On-Time

Adjustable Output Option Regulation

Voltage

0.625

Logic High Input Voltage

ON2

1.4

Logic Low Input Voltage

ON2

0.4

Thermal Shutdown Temperature

Temperature Rising

160

°C

Thermal Shutdown Hysteresis

Temperature Falling

°C

ELECTRICAL CHARACTERISTICS (REG2)

(VVP2 = 3.6V, TA = 25°C, unless otherwise specified.)

: VNOM2 refers to the nominal output voltage level for VOUT2 as defined by the Ordering Information section.

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