RT8059 datasheet(3/10 Pages) RICHTEK

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RT8059

DS8059-04 December 2011

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Absolute Maximum Ratings

(Note 1)

VIN to GND -------------------------------------------------------------------------------------------------------- 6.5V

LX Pin Switch Voltage ------------------------------------------------------------------------------------------

−0.3V to (PVDD + 0.3V)

< 30ns --------------------------------------------------------------------------------------------------------------

−5V to 7.5V

EN, FB to GND --------------------------------------------------------------------------------------------------- VIN + 0.6V

Power Dissipation, PD @ TA = 25

°C

TSOT-23-5 --------------------------------------------------------------------------------------------------------- 0.392W

Package Thermal Resistance (Note 2)

TSOT-23-5,

θJA --------------------------------------------------------------------------------------------------- 255°C/W

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

°C

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

°C

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

−65°C to 150°C

ESD Susceptibility (Note 3)

HBM (Human Body Mode) ------------------------------------------------------------------------------------- 2kV

MM (Machine Mode) -------------------------------------------------------------------------------------------- 200V

Electrical Characteristics

(VIN = 3.6V, VOUT = 2.5V, L = 2.2

μH, CIN = 4.7μF, COUT = 10μF, TA = 25°C, unless otherwise specified)

Recommended Operating Conditions

(Note 4)

Supply Input Voltage, VIN -------------------------------------------------------------------------------------- 2.8V to 5.5V

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

−40°C to 125°C

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

−40°C to 85°C

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Quiescent Current

IOUT = 0mA, VFB = VREF + 5%

μA

Shutdown Current

ISHDN

EN = GND

0.1

μA

Reference Voltage

VREF

0.588

0.6

0.612

Adjustable Output Range

VOUT

(Note 5)

VREF

VIN − 0.2

Adjustable Output Voltage

Accuracy

ΔVOUT

VIN = VOUT + ΔV to 5.5V,

0A < IOUT < 1A, (Note 6)

−3

FB Input Current

IFB

VFB = VIN

−50

P-MOSFET RON

RDS(ON)_P

IOUT = 200mA

0.28

N-MOSFET RON

RDS(ON)_N

IOUT = 200mA

0.25

P-Channel Current Limit

ILM_P

VIN = 2.8V to 5.5V

1.5

Logic-High

VIH

VIN = 2.8V to 5.5V

1.5

EN Input Threshold

Voltage

Logic-Low

VIL

VIN = 2.8V to 5.5V

0.4

Under Voltage Lockout Threshold VUVLO

2.3

Under Voltage Lockout Hysteresis

ΔVUVLO

0.2

Oscillator Frequency

fOSC

IOUT = 100mA

1.2

1.5

1.8

MHz

Thermal Shutdown Temperature

TSD

150

°C

Max. Duty Cycle

DMAX

100

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