NCP370(2008) 查看數據表（PDF） - ON Semiconductor

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NCP370
(Rev.:2008)

Positive and Negative Overvoltage Protection with Internal Low RON N-MOSFETs and Reverse Charge Control Pin

ON Semiconductor 

NCP370

Positive and Negative

Overvoltage Protection

with Internal Low RON

N-MOSFETs and Reverse

Charge Control Pin

http://onsemi.com

The NCP370 is an overvoltage, overcurrent and reverse control

device. Two main modes are available by setting logic pins. First mode

is Direct Mode from Wall−Adapter to the system. In this mode the

system is both positive and negative over−voltage protected up to

+28 V and down to −28 V. The wall adapter (or AC/DC charger) is

disconnected from the system if the input voltage exceeds the

overvoltage (OVLO) or undervoltage (UVLO) thresholds. At power

up, the Vout turns on 30 ms after the Vin exceeds the undervoltage

threshold.

The second mode (see Tables 1 & 2), called the Reverse Mode,

allows an external accessory to be powered by the system battery or

boost converter. Here the external accessory would be connected to the

device input (bottom connector of system) and the device battery

would be at the device output. In this case overcurrent protection is

activated to prevent accessory faults and battery discharge. Thanks to

the NCP370 using an internal NMOS, the system cost and the PCB

area of the application board are minimized.

The NCP370 provides a negative going flag (FLAG) output which

alerts the system that a fault has occurred.

In addition, the device has ESD−protected input (15 kV Air) when

bypassed with a 1 mF or larger capacitor.

MARKING

DIAGRAM

1

12 PIN LLGA

MU SUFFIX

CASE 513AK

NCAI

370

ALYWG

G

A

= Assembly Location

L

= Wafer Lot

Y

= Year

W

= Work Week

G

= Pb−Free Package

(Note: Microdot may be in either location)

IN 1

IN 2

GND 3

RES 4

RES 5

NCP370

12 NC

11 OUT

10 FLAG

9 DIR

8 REV

Features

• Overvoltage Protection Up to 28 V

• Negative Voltage Protection Down to −28 V

• Reverse Charge Control: REV

• Direct Charge Control: DIR

• Overcurrent Protection

• Thermal Shutdown

• On−chip Low RDS(on) NMOS Transistors: Typical 130 mW

• Overvoltage Lockout (OVLO)

• Undervoltage Lockout (UVLO)

• Soft−Start

• Alert FLAG Output

• Compliance to IEC61000−4−2 (Level 4)

8 kV (Contact)

15 kV (Air)

• ESD Ratings: Machine Model = B

Human Body Model = 2

• 12 Lead TLLGA 3x3 mm Package

• This is a Pb−Free Device

RES 6

(Top View)

7 Ilim

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 10 of this data sheet.

Typical Applications

• Cell Phones

• Camera Phones

• Digital Still Cameras

• Personal Digital Applications

• MP3 Players

© Semiconductor Components Industries, LLC, 2008

1

December, 2008 − Rev. 2

Publication Order Number:

NCP370/D

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