MPQ

4568―60V, 100mA, SYNCHRONOUS STEP-DOWN CONVERTER

MPQ4568 Rev. 1.0

www.MonolithicPower.com

3

8/20/2013

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© 2013 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

Parameter

Condition

Min

Typ

Max

Units

Supply Quiescent Current

20

25

μA

50

μA

Shutdown Supply Current

2

5

μA

VIN UVLO Rising Threshold

3.75

4.0

4.25

V

VIN UVLO Falling Threshold

3.25

3.5

3.75

V

VIN UVLO Hysteresis

0.5

V

VIN OVP Rising Threshold

47

50

53

V

VIN OVP Falling Threshold

45.5

48

50.5

V

VIN OVP Hysteresis

2

V

Feedback Voltage

VIN = 4.5V to 45V,

0.99

1

1.01

V

VIN = 4.5V to 45V

0.98

1

1.02

V

Feedback Current

-50

2

50

nA

FB OVP Hysteresis

35

60

85

mV

Upper Switch On Resistance

°C

1.75

2.25

2.75

Ω

1.5

4

Ω

Lower Switch On Resistance

0.55

0.7

0.85

Ω

0.5

1.1

Ω

Switch Leakage

0.01

1

μA

Peak Current Limit

ILIM floating

30

55

80

mA

ILIM=200kΩ

75

110

135

mA

ILIM=0

200

260

320

mA

Minimum Switch On Time

(5)

100

ns

Enable Rising Threshold

Low-to-High

1.4

1.6

1.8

Enable Falling Threshold

High-to-Low

1.05

1.2

1.35

V

Enable Current

1.2

1.5

μA

ENHY Sink Current Capability

Sink 4mA

0.4

V

Soft Start Current

2.5

3

4

μA

Built-in Soft Start Time

SS pin floating

1

ms

Thermal Shutdown

(5)

160

°C

Thermal Shutdown Hysteresis

(5)

20

°C

Notes:

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