NCP373 Datasheet PDF - ON Semiconductor
| Part Number | NCP373 | |
| Description | Over-Voltage and Over-Current protection device | |
| Manufacturers | ON Semiconductor | |
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NCP373
Overvoltage Up to +30 V
and Down to -30 V with
Load Switch Function
NCP373 is an over−voltage and over−current protection device.
From IN to VBUS , the part acts as a load switch protection, with
programmable current regulation. The current protection is externally
adjustable, up to 400 mA or 1300 mA, depending on selected version.
Additional voltage protection is available, from VBUS to IN. Due to
built−in low RDS(on) NMOS FET, the host system is protected against
positive and negative voltages up to ±28 V.
The embedded over−current and over−voltage protection allow the
device to sustain extreme conditions from short circuit on USB
connector, or defective WA or USB port.
Because to the NCP373 using internal NMOS, the system cost and
the PCB area of the application board are minimized.
NCP373 provides a negative going flag (FLAG) output, which
alerts the system that a fault has occurred.
Features
• Adjustable Over−current
• Over−voltage Protection Up to 28 V and Down to −28 V
• Logic pins EN and DIR
• Thermal Shutdown
• On−chip low RDS(on) NMOS Transistors
• Over−voltage Lockout (OVLO)
• Soft−start
• Real Shutdown Mode
• 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 Leads LLGA 3X3 mm Package
• These are Pb−Free Devices
Typical Applications
• USB ports
• Tablets
• Set Top Box
• Cell Phones
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MARKING
DIAGRAM
1
12 PIN LLGA
MU SUFFIX
CASE 513AK
XXXX
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
VBUS 1
VBUS 2
GND 3
RES1 4
RES2 5
RES3 6
NCP373
(Top View)
12 NC
11 IN
10 FLAG
9 DIR
8 EN
7 Ilim
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 9 of this data sheet.
© Semiconductor Components Industries, LLC, 2013
May, 2013 − Rev. 2
1
Publication Order Number:
NCP373/D
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| |
 
NCP373
ELECTRICAL CHARACTERISTICS Min / Max limits values (−40°C < TA < +85°C) and IN = +5 V (Unless otherwise noted). Typical
values are TA = +25°C
Characteristics
Symbols
Conditions
Min Typ Max Unit
Input Voltage Range
Vbus Voltage Range
Vin
Vvbus
All modes
2.5 5.5 V
−28 28 V
All modes
IN = 5 V
−23
Under Voltage Lockout Threshold
UVLO
Vbus falls down UVLO threshold
Disable, Charge mode and Enhance
Modes
2.6 2.7 2.8
V
Under Voltage Lockout Hysteresis
Over voltage Lockout threshold
UVLOhyst
OVLO
Vbus rises up UVLO threshold +
UVLOhyst
Vbus rises up OVLO threshold
45 60 75
5.6 5.77 5.9
mV
V
Over Voltage Lockout Hysteresis
Vbus versus IN Resistance
IN versus Vbus Resistance
OVLOhyst
RDson
Vbus falls down to OVLO – OVLOhyst
Vbus = 5 V, or IN = 5 V Direct Mode,
Load
connected to Vout
NCP373MU04TXG
NCP373MU13TXG
45 65 90 mV
mW
200 300
130 220
Quiescent Current
Standby Current
IddIN
IddSTD
No load. Vbus mode, Vin= 5 V
No load, IN = 5 V. Standby mode, No
Vbus
200 315
0.02 1
mA
mA
Current limit
IOCP
IN = 5 V, Load on Vbus,
Vbus mode
RILIM = 0 W
NCP373MU04TXG
NCP373MU13TXG
330
1100
400
1300
470
1500
mA
FLAG Output Low Voltage
Volflag
Fault mode
Sink 1 mA on FLAG pin
400 mV
FLAG Leakage Current
DIR Voltage High
DIR Voltage Low
FLAGleak
Vih
Vol
FLAG level = 5.5 V
1 nA
1.2 V
0.4 V
DIR Leakage current
DIRleak
DIR = 5.5 V
300 nA
EN Voltage High
EN Voltage Low
EN Leakage current
Vih
Vol
ENleak
EN = 5.5 V
1.2 V
0.4 V
300 nA
Thermal Shutdown temperature
Thermal Shutdown Hysteresis
TIMINGS
TSD
TSDHYST
150 °C
30 °C
Vbus MODE
Start Up Delay
TonVbus
IN ≥ 2.5 V, from EN = 1.2 to 0.4 to
Vbus ≥ 0.3 V
Vbus Mode
0.6 1.2 1.8 ms
FLAG going up Delay
Tstartvbus
From IN ≥ 0.3 V FLAG = 1.2 V, Vbus
0.6
1.2
1.8
ms
Mode
Rearming Delay
tRRD
IN > .2.5 V, Rin = 1 W Vbus Mode, after
15
30
45
ms
fault
Over Current Regulation Time
treg
IN > 2.6, Vbus > 0.3 V Vbus Mode
0.5 1.2 1.8 ms
OCP delay time
tOCP
From I Vbus > Ilim, 1 A/1 ms
5 ms
NOTE: Electrical parameters are guaranteed by correlation across the full range of temperature.
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| Information | Total 10 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NCP373.PDF Datasheet ] | |
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