MP2172 – 5.5V, 2A, 2.6MHz, SYNCHRONOUS STEP-DOWN SWITCHER

MP2172 Rev. 1.0

www.MonolithicPower.com

3

4/24/2019

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© 2019 MPS. All Rights Reserved.

ELECTRICAL CHARACTERISTICS

VIN = 5V, TJ = -40°C to +125°C (6), unless otherwise noted, typical values are at TJ = +25°C.

Parameter

Symbol Condition

Min

Typ

Max

Units

Quiescent current

IQ

VIN = 5V, VEN = 2V,

VFB = 0.63V, no switching

520

720

μA

Supply current (shutdown)

ISHDN

VEN = 0V, TJ = +25°C

0.1

2

μA

VEN = 0V, TJ = -40°C to +125°C

0.1

35

Feedback voltage

VFB

TJ = +25°C

591

600

609

mV

TJ = -40°C to +125°C

588

600

612

Feedback current

IFB

VFB = 0.63V

10

100

nA

P-FET switch on resistance

RDSON_P

80

120

mΩ

N-FET switch on resistance

RDSON_N

45

75

mΩ

Switch leakage

VEN = 0V, VIN = 5V, VSW = 0V

and 5V, TJ = +25°C

0.1

2

μA

VEN = 0V, VIN = 5V, VSW = 0V

and 5V, TJ = -40°C to +125°C

0.1

35

P-FET current limit

TJ = +25°C

3.4

4.5

6

A

On time

tON

VIN = 3.3V, VOUT = 1.2V

135

150

180

ns

VIN = 3.3V, VOUT = 1.8V

190

210

270

VIN = 5V, VOUT = 1.2V

95

110

130

VIN = 5V, VOUT = 1.8V

130

150

190

Switching frequency

fs

VIN = 3.3V, VOUT = 1.2V

1850

2400

2700

kHz

VIN = 3.3V, VOUT = 1.8V

2000

2600

2800

VIN = 5V, VOUT = 1.2V

1850

2200

2500

VIN = 5V, VOUT = 1.8V

1850

2380

2700

Minimum off time

tMIN-OFF

VIN = 3.3V, VOUT = 1.2V

60

90

ns

VIN = 3.3V, VOUT = 1.8V

VIN = 5V, VOUT = 1.2V

30

50

ns

VIN = 5V, VOUT = 1.8V

Soft-start time (5)

tSS-ON

VIN = 3.6V, VOUT = 1.5V, 10% to

90%

0.6

1.3

2.2

ms

Soft-stop time (5)

tSS-OFF

VIN = 3.6V, VOUT = 1.5V, 90% to

10%

0.4

0.9

1.6

ms

Power good upper trip

threshold rising

PGH-R

FB rising when PG turns to high

voltage

110

115

120

%

Power good upper trip

threshold falling

PGH-F

FB falling when PG turns to

high voltage

105

110

115

%

Power good upper trip

hysteresis

PGH_Hys

5

%

Power good lower trip

threshold rising

PGL-R

FB rising when PG turns to high

voltage

85

90

95

%

Power good lower trip

threshold falling

PGL-F

FB falling when PG turns to

high voltage

80

85

90

%

Power good lower trip

hysteresis

PGL-Hys

5

%