MP2131 datasheet(4/16 Pages) MPS

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MP2131 – 4 A, 5.5 V, 1.2 MHZ SYNCHRONOUS STEP-DOWN CONVERTER

MP2131 Rev.1.0

www.MonolithicPower.com

5/6/2015

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS

VIN = 3.6 V, TJ = -40°C to +125°C, typical value is tested at TJ = +25°C, unless otherwise noted.

Parameter

Symbol Condition

Min

Typ

Max

Units

Feedback voltage

VFB

2.7 V ≤ VIN ≤ 5.5 V,

TJ = 25°C

594

600

606

Feedback voltage

VFB

2.7 V ≤ VIN ≤ 5.5 V

588

600

612

Feedback current

IFB

VFB = 0.63 V

PFET switch on resistance

RDSON_P VIN = 5 V

mΩ

NFET switch on resistance

RDSON_N VIN = 5 V

mΩ

Switch leakage

VEN = 0 V, VIN = 5.5 V

VSW =0 V and 5.5 V,

TJ=25°C

μA

PFET peak current limit

(5)

TJ=25°C

5.5

7.5

NFET valley current limit

(5)

3.5

VIN = 5 V, VOUT = 1.2 V

200

On time

TON

VIN = 3.6 V, VOUT = 1.2 V

280

Switching frequency

VOUT =1.2 V

1200

kHz

Minimum off time

TMIN-OFF

100

Minimum on time

(6)

TMIN-On

Soft-start time

TSS-ON

From 10% VOUT to 90%

VOUT

0.5

Soft-stop time

TSS-OFF

From 90% VOUT to 10%

VOUT

0.8

Power good upper trip threshold

FB with respect to the

regulation

+10

Power good lower trip threshold

-10

Power good delay

Rising

μs

Power good sink current

capability

VPG_LO

Sink 1 mA

0.4

Power good logic-high voltage

VPG_HI

VIN = 5 V,VFB = 0.63 V

4.9

Power good internal pull-up

resistor

RPG

400

kΩ

Under-voltage lockout

threshold—rising

-40

oC ≤ TJ ≤ 85oC

2.48

2.68

Under-voltage lockout

threshold—hysteresis

450

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