MP2370 datasheet(2/8 Pages) MPS

2 / 8 page

MP2370 – 1.2A, 24V, 1.4MHz STEP-DOWN WHITE LED DRIVER IN A TSOT23-6

MP2370 Rev. 0.96

www.MonolithicPower.com

9/21/2007

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

PACKAGE REFERENCE

BST

GND

TOP VIEW

Part Number*

Package

Temperature

MP2370DJ

TSOT23-6

–40

°C to +85°C

* For Tape & Reel, add suffix –Z (eg. MP2370DJ–Z)

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

MP2370DJ–LF–Z)

ABSOLUTE MAXIMUM RATINGS (1)

Supply Voltage VIN....................................... 26V

VSW....................................... –0.3V to VIN + 0.3V

VBS ....................................................... VSW + 6V

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)

Supply Voltage VIN........................... 4.5V to 24V

Output Voltage VOUT ...................... 0.15V to 15V

Ambient Temperature................–40

°C to +85°C

Thermal Resistance

(3)

θJA

θJC

TSOT23-6.............................. 220 .... 110..

°C/W

Notes:

1) Exceeding these ratings may damage the device.

2) The device function is not guaranteed outside of the

recommended operating conditions.

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

ELECTRICAL CHARACTERISTICS

VIN = 12V, TA = +25°C, unless otherwise noted.

Parameters

Symbol Condition

Min

Typ

Max

Units

Feedback Voltage

VFB

4.5V

≤ VIN ≤ 24V

0.145

0.155

0.165

Feedback Current

IFB

VFB = 0.15V

0.1

μA

Switch-On Resistance

(4)

RDS(ON)

0.35

Ω

Switch Leakage

VEN = 0V, VSW = 0V

μA

Current Limit

(4)

1.8

Oscillator Frequency

fSW

VFB = 0.13V

1.2

1.4

1.7

MHz

Fold-back Frequency

VFB = 0V

700

KHz

Maximum Duty Cycle

VFB = 0.13V

Minimum On-Time

(4)

tON

100

Under Voltage Lockout Threshold Rising

2.5

2.8

3.1

Under Voltage Lockout Threshold Hysteresis

150

EN Input Low Voltage

0.4

EN Input High Voltage

1.2

VEN = 2V

2.1

EN Input Current

VEN = 0V

0.1

μA

Supply Current (Shutdown)

VEN = 0V

0.1

1.0

μA

Supply Current (Quiescent)

VEN = 2V, VFB =

0.2V

0.8

1.0

Thermal Shutdown

(4)

150

°C

Note:

4) Guaranteed by design.

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