RT9451 datasheet(5/37 Pages) RICHTEK

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RT9451

DS9451-00

September 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Currents

Battery Discharge

Current in High

Impedance Mode

(ISENL, ISENR, LX,

BATS Pins)

IDISCHARGE VBATS = 4.2 V

High Impedance Mode,

SDA = SCL = 0

μA

Charger PWM ON

10000

VIN Supply Current

VIN > VIN(MIN)

Charger PWM OFF

5000

μA

Voltage Regulation

Output Charge Voltage VOREG

Operating in voltage regulation,

programmable

3.5

4.44

Voltage Regulation

Accuracy

0 to 85°C

−1

Recommended Operating Conditions

(Note 4)

Supply Input Voltage Range, VIN --------------------------------------------------------------------------------------- 4.3V to 12V

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

−40°C to 125°C

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

−40°C to 85°C

Absolute Maximum Ratings

(Note 1)

Supply Voltage VIN --------------------------------------------------------------------------------------------------------

−0.3V to 28V

MID, BOOT to PGND ------------------------------------------------------------------------------------------------------

−0.3V to 28V

Other Pins --------------------------------------------------------------------------------------------------------------------

−0.3V to 6V

VISENL to VISENR ------------------------------------------------------------------------------------------------------------

±6V

Output Current (average) LX --------------------------------------------------------------------------------------------- 4A

Output Current (continuous) LDO -------------------------------------------------------------------------------------- 100mA

Power Dissipation, PD @ TA = 25

°C

WQFN-32L 4x4 ------------------------------------------------------------------------------------------------------------- 3.59W

Package Thermal Resistance (Note 2)

WQFN-32L 4x4,

θJA -------------------------------------------------------------------------------------------------------- 27.8°C/W

WQFN-32L 4x4,

θJC ------------------------------------------------------------------------------------------------------- 7°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

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

(VBATS = 3.6V

± 5%, TA = 25°C, unless otherwise specified)

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