MP2371 – 1.8A, 24V, 700KHz STEP-DOWN CONVERTER

MP2371 Rev. 1.0

www.MonolithicPower.com

2

5/26/2008

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2008 MPS. All Rights Reserved.

PACKAGE REFERENCE

Part Number*

Package

Temperature

MP2371DG

2x2 QFN8

–40

°C to +85°C

For RoHS compliant packaging, add suffix –LF (eg.

MP2371DG–LF–Z)

All Other Pins................................. –0.3V to +6V

Junction Temperature...............................150

°C

Lead Temperature ....................................260

°C

Storage Temperature ..............–65

°C to +150°C

Recommended Operating Conditions

(2)

Operating Temperature .............–40

°C to +85°C

Thermal Resistance

(3)

2x2 QFN8 ............................... 80 ...... 16...

°C/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device is not guaranteed to function outside of its

operating conditions.

3) Measured on approximately 1” square of 1 oz copper.

ELECTRICAL CHARACTERISTICS

Parameters

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

4.5V

0.790

0.810

0.830

V

Feedback Current

10

nA

Switch On-Resistance

(4)

0.3

Ω

Switch Leakage

0

10

µA

Current Limit

(4)

Duty Cycle = 40%

2.0

2.5

A

Oscillator Frequency

700

KHz

Fold-back Frequency

230

KHz

Maximum Duty Cycle

87

%

Minimum On-Time

(4)

100

ns

Under-Voltage Lockout Threshold Rising

2.5

2.8

3.1

V

Under-Voltage Lockout Threshold Hysteresis

150

mV

EN Input Low Voltage

0.4

V

EN Input High Voltage

1.5

V

2.1

EN Input Current

0.01

µA

Supply Current (Shutdown)

0.1

1.0

µA

Supply Current (Quiescent)

0.8

1.0

mA

Thermal Shutdown

(4)

150

°C

Note:

4) Guaranteed by design.

QFN8

(2mm x 2mm)

TOP VIEW

NC

SW

IN

EN

1

2

3

4

NC

BST

GND

FB

8

7

6

5