RT9085A datasheet(5/15 Pages) RICHTEK

5 / 15 page

DS9085A-02 March 2019

www.richtek.com

RT9085A

is a registered trademark of Richtek Technology Corporation.

Recommended Operating Conditions

(Note 4)



Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 0.8V to 5.5V



Supply Input Voltage, BIAS --------------------------------------------------------------------------------------------- 3V to 5.5V



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

−40°C to 125°C

Electrical Characteristics

(VBIAS

≥ 3V, and VBIAS ≥ VOUT + 1.6V, VIN = VOUT(NOMl) + 0.3V, IOUT = 1mA, VEN = 1V, CIN = 4.7μF, COUT = 10μF, CBIAS = 1μF, TA =

°C, unless otherwise specified). (Note 6)

Absolute Maximum Ratings

(Note 1)



Supply Input Voltage, VIN -----------------------------------------------------------------------------------------------

−0.3V to 6V



All Other Pins --------------------------------------------------------------------------------------------------------------

−0.3V to 6V



Power Dissipation, PD @ TA = 25

°C

WL-CSP-6B 0.8x1.2 (BSC) --------------------------------------------------------------------------------------------- 0.67W



Package Thermal Resistance (Note 2)

WL-CSP-6B 0.8x1.2 (BSC),

θJA --------------------------------------------------------------------------------------- 148°C/W



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

°C



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

°C



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

−65°C to 150°C



ESD Susceptibility (Note 3)

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

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Operating Input

Voltage Range

VIN

0.8

5.5

Operating Bias

Voltage Range

VBIAS

5.5

Under-Voltage

Lockout

VUVLO

VBIAS rising

1.6

Hysteresis

0.2

Reference Voltage

(Adj devices only)

VREF

0.49

0.5

0.51

Output Voltage

Accuracy

(Note 5)

VOUT

VOUT = 0.5V, no load

0.5

0.5

Output Voltage

Accuracy

(Note 5)

VOUT

1. VOUT(NOM) + 0.3V  VIN  VOUT(NOM) + 1V

2. VBIAS  3V and VOUT(NOM) + 1.6V  VBIAS

 5.5V

3. 1mA

 IOUT  1A

1

VIN Line Regulation

VLINE_VIN VOUT(NOM) + 0.3V  VIN  5V

0.01

%/V

VBIAS Line

Regulation

VBIAS_VIN

VBIAS  3V and VOUT(NOM) + 1.6V  VBIAS 

5.5V

0.01

%/V

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