NCP370 Datasheet, PDF (1/11 Pages) ON Semiconductor – Positive and Negative Overvoltage Protection with Internal Low RON N-MOSFETs and Reverse Charge Control Pin

NCP370
Positive and Negative
Overvoltage Protection
with Internal Low R_ON
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 V_out turns on 30 ms after the V_in 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 R_DS(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