RT9187 datasheet(4/8 Pages) RICHTEK

4 / 8 page

RT9187

DS9187-08 August 2007

www.richtek.com

Absolute Maximum Ratings

(Note 1)

Supply Input Voltage -------------------------------------------------------------------------------------------------- 6V

EN Input Voltage ------------------------------------------------------------------------------------------------------- 6V

Power Dissipation, PD @ TA = 25

°C

VDFN-8L 3x3 ----------------------------------------------------------------------------------------------------------- 0.923W

Package Thermal Resistance (Note 9)

VDFN-8L 3x3,

θJC ----------------------------------------------------------------------------------------------------- 8.2°C/W

VDFN-8L 3x3,

θJA ------------------------------------------------------------------------------------------------------ 108°C/W

Lead Temperature (Soldering, 10 sec.) --------------------------------------------------------------------------- 260

°C

Junction Temperature ------------------------------------------------------------------------------------------------- 150

°C

Storage Temperature Range ----------------------------------------------------------------------------------------

−65°C to 150°C

ESD Susceptibility (Note 2)

HBM ---------------------------------------------------------------------------------------------------------------------- 2kV

MM ------------------------------------------------------------------------------------------------------------------------ 200V

Recommended Operating Conditions

(Note 3)

Supply Input Voltage -------------------------------------------------------------------------------------------------- 2.5V to 5.5V

EN Input Voltage ------------------------------------------------------------------------------------------------------- 0V to 5.5V

Junction Temperature Range ----------------------------------------------------------------------------------------

−40°C to 125°C

Ambient Temperature Range ----------------------------------------------------------------------------------------

−40°C to 85°C

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Output Voltage Accuracy

(Fixed Output Voltage)

ΔVOUT

IOUT = 10mA

−2

Output Voltage Range (Adjustable)

VOUT_Adj

0.8

4.5

Quiescent Current (Note 6)

VEN ≥ VIH, IOUT = 0mA

380

500

μA

Standby Current (Note 7)

ISTBY

VEN ≤ VIL,VIN = 3.3V

0.1

μA

Current Limit

ILIM

RLOAD = 0.5Ω, VIN = 3.3V

2.8

IOUT = 0.25A (Note 8)

100

IOUT = 0.5A

120

180

Dropout Voltage (Note 4)

VDROP

IOUT = 1.0A

240

360

Load Regulation (Note 5)

(Fixed Output Voltage)

ΔVLOAD

VIN = (VOUT + 0.5V)

10mA < IOUT < 1.0A

0.4

%/A

Logic-Low Voltage

VIL

VIN = 3.3V

0.6

EN Threshold

Logic-High Voltage

VIH

VIN = 3.3V

1.8

Enable Pin Current

IEN

VIN = 3.3V, Enable

0.1

μA

f = 100Hz

−60

Power Supply

Rejection Rate

f = 10kHz

PSRR

IOUT = 300mA

−50

To be continued

(VIN = VOUT + 1V, VEN = VIN, CIN = COUT = 2.2

μF (Ceramic) & CBP = 10nF, TA = 25°C unless otherwise specified)

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