RT8299 datasheet(4/15 Pages) RICHTEK

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RT8299

DS8299-01 May 2012

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

(VIN = 12V, TA = 25

°C, unless otherwise specified)

Absolute Maximum Ratings (Note 1)

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

−0.3 to 26V

Switching Voltage, SW -------------------------------------------------------------------------------------

−0.3 to (VIN + 0.3V)

Boot Voltage, BOOT ----------------------------------------------------------------------------------------- (VSW

− 0.3V) to (VSW + 6V)

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

−0.3 to 6V

Power Dissipation, PD @ TA = 25

°C

SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W

WDFN-10L 3x3 ------------------------------------------------------------------------------------------------ 1.429W

Package Thermal Resistance (Note 2)

SOP-8 (Exposed Pad),

θJA --------------------------------------------------------------------------------- 75°C/W

SOP-8 (Exposed Pad),

θJC -------------------------------------------------------------------------------- 15°C/W

WDFN-10L 3x3,

θJA ------------------------------------------------------------------------------------------ 70°C/W

WDFN-10L 3x3,

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

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

°C

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

°C

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

−65°C to 150°C

ESD Susceptibility (Note 3)

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

MM (Machine Model) ---------------------------------------------------------------------------------------- 200V

Recommended Operating Conditions

(Note 4)

Supply Voltage, VIN ------------------------------------------------------------------------------------------- 3V to 24V

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

−40°C to 125°C

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

−40°C to 85°C

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Shutdown Current

ISHDN

VEN = 0V

μA

Supply Current

VEN = 3V, VFB = 1V

Upper Switch On Resistance

100

Lower Switch On Resistance

100

Switch Leakage

VEN = 0V, VSW = 0V or 12V

μA

Current Limit

ILIM

VBOOT − VSW = 4.8V

5.5

Oscillator Frequency

fOSC

VFB = 0.75V

425

500

575

kHz

Short Circuit Frequency

VFB = 0V

150

kHz

Maximum Duty Cycle

DMAX

VFB = 0.8V

Minimum On-Time

tON

100

Feedback Voltage

VFB

4.5V

≤ VIN ≤ 24V

788

800

812

Logic-High

VIH

5.5

EN Input

Threshold Voltage Logic-Low

VIL

0.4

Under Voltage Lockout Threshold VUVLO

VIN Rising

2.8

Under Voltage Lockout Threshold

Hysteresis

ΔVUVLO

300

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