MP2234S datasheet(4/19 Pages) MPS

Il numero della parte	MP2234S

Spiegazioni elettronici	High-Efficiency, 2A, 16V, 800kHz Synchronous, Step-Down Converter

Download	19 Pages

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Produttore elettronici	MPS [Monolithic Power Systems]

Homepage	http://www.monolithicpower.com

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4 / 19 page

MP2234S – SYNCHRONOUS STEP-DOWN CONVERTER

MP2234S Rev.1.0

www.MonolithicPower.com

4

4/3/2015

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

ELECTRICAL CHARACTERISTICS

VIN=12V, TJ=-40°C to +125°C

(6), typical value is tested at TJ=+25°C, unless otherwise noted.

Parameter

Symbol

Condition

Min

Typ

Max

Units

Supply Current (Shutdown)

IIN

VEN = 0V, TJ=+25°C

1

μA

VEN = 0V, TJ=-40°C to +125°C

5

μA

Supply Current (Quiescent)

Iq

VEN = 2V, VFB = 1V

0.5

1

mA

HS Switch-On Resistance

HSRDS-ON VBST-SW=5V

140

mΩ

LS Switch-On Resistance

LSRDS-ON

VCC =5V

60

mΩ

Switch Leakage

SWLKG

VEN = 0V, VSW =12V or 0V

1

μA

Current Limit

ILIMIT

Under 40% Duty Cycle

3

4

A

Oscillator Frequency

fSW

VFB=0.75V,TJ=+25°C

620

800

900

kHz

VFB=0.75V,TJ=-40°C to +125°C

550

800

900

kHz

Fold-Back Frequency

fFB

VFB<400mV

0.5

fSW

Maximum Duty Cycle

DMAX

VFB=700mV

92

%

Minimum On Time

(7)

τON_MIN

40

ns

Sync Frequency Range

fSYNC

0.3

2

MHz

Feedback Voltage

VFB

TJ =25°C

788

804

820

mV

TJ=-40°C to +125°C

784

804

824

mV

Feedback Current

IFB

VFB=830mV

10

50

nA

EN Rising Threshold

VEN_RISING

1

1.4

1.8

V

EN Hysteresis

VEN Hysteresis

150

mV

EN Input Current

IEN

VEN=2V

2

μA

VEN=0

0

μA

EN Turn-Off Delay

ENtd-off

10

μs

VIN Under-Voltage Lockout

Threshold—Rising

INUVVth

3.5

3.9

4.3

V

VIN Under-Voltage Lockout

Threshold—Hysteresis

INUVHYS

700

mV

VCC Regulator

VCC

4.6

5

5.4

V

VCC Load Regulation

ICC=5mA

2

%

Soft-Start Current

ISS

8

11

14

μA

Thermal Shutdown

(7)

150

°C

Thermal Hysteresis

(7)

20

°C

Notes:

6) Not tested in production. Guaranteed by over-temperature correlation.

7) Guaranteed by design.

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