MP2456 – 0.5A, 50V, 1.2MHz, STEP-DOWN CONVERTER IN A TSOT23-6

MP2456 Rev. 1.01

www.MonolithicPower.com

3

1/24/2017

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ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameters

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

VFB

4.5V

 VIN  50V

0.792

0.812

0.832

V

Feedback Current

IFB

VFB = 0.85V

0.1

μA

Switch-On Resistance

RDS(ON)

1

Ω

Switch Leakage

ISW_LKG

VEN = 0V, VSW = 0V

1

μA

Current Limit

ILIM

1.0

1.25

1.5

A

Oscillator Frequency

fSW

VFB = 0.6V

0.95

1.2

1.45

MHz

Foldback Frequency

fSW_F

VFB = 0V

200

kHz

Maximum Duty Cycle

DMAX

VFB = 0.6V

89

91

%

Minimum ON-Time

(5)

τON

50

ns

Under-Voltage Lockout Threshold, Rising

VUVLO_R

2.9

3.3

3.7

V

Under-Voltage Lockout Threshold, Falling

VUVLO_F

2.65

3.05

3.45

V

Under-Voltage Lockout Threshold,

Hysteresis

VUVLO_HYS

250

mV

EN Threshold, Rising

VEN_R

1.2

1.35

1.5

V

EN Threshold, Falling

VEN_F

1

1.17

1.35

V

EN Threshold, Hysteresis

VEN_HYS

180

mV

EN Input Current

IEN

VEN = 2V

3.1

μA

VEN = 0V

0.1

Supply Current (Shutdown)

IS

VEN = 0V

0.1

1.0

μA

Supply Current (Quiescent)

IQ

VEN = 2V, VFB = 1V

0.73

0.85

mA

Thermal Shutdown

(5)

TSD

165

°C

Thermal Shutdown Hysteresis

(5)

TSD_HYS

20

°C

Notes:

5) Derived from bench characterization. Not tested in production.