MP2127 datasheet(3/11 Pages) MPS

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MP2127 – 2.7-6V, 2A, 1.2MHZ SYNCHRONOUS STEP-DOWN CONVERTER

MP2127 Rev. 0.91

www.MonolithicPower.com

4/27/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

ELECTRICAL CHARACTERISTICS (5)

VIN = 3.6V, TA = +25°C, unless otherwise noted.

Parameters

Symbol

Condition

Min

Typ

Max

Units

Supply Current

IIN

VFB = 0.9V

500

750

μA

Thermal

Shutdown

Trip

Threshold

TSD

Hysteresis = 20°C

150

°C

Undervoltage

Lockout

Threshold

INUVVTH

Rising Edge

2.15

2.40

2.65

Undervoltage

Lockout

Hysteresis

INUVHYS

160

TA = +25°C

0.784

0.800

0.816

Regulated FB Voltage

VFB

-40°C≤ TA≤ +85°C

0.776

0.800

0.824

FB Input Bias Current

IFB

VFB = 0.9V

-50

-2

+50

SW PFET On Resistance

HSRDS-ON

ISW = 100mA

0.19

0.23

0.27

Ω

SW NFET On Resistance

LSRDS-ON

ISW = -100mA

0.16

0.2

0.24

Ω

Duty Cycle=100%

2.2

3.0

3.8

SW PFET Peak Current

Limit

ILIMIT

Duty Cycle=50%

(6)

2.5

3.5

4.5

Switching Frequency

FSW

1.0

1.2

1.4

MHz

OVP

threshold

(PGOOD

Output High)

VFB OVP-

VFB ramps up from VFB

nominal operating point

103%

VFB

OVP

threshold

(Fault

Detected)

VFB OVP+

VFB ramps up from VFB

nominal operating point

111%

VFB

OVP Hysteresis

PGOOD, Output High

VFB OVP+

Ramp up VFB, starting at

VFB≤700mV

94%

98.5%

VFB

PGOOD, Output Low

VFB OVP-

Ramp down VFB,starting at

VFB= VFB nom

95%

VFB

PGOOD output low voltage

ISINK = 6mA

0.4

PGOOD Deglitch Time

160

μs

Line Regulation

4.5V≤VIN≤5.5V, IOUT=100mA

0.1

Load Regulation

0A ≤IOUT≤ 2A

0.1

Notes:

5) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.

6) Guaranteed by design

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