NCP370_11 [ONSEMI]

Positive and Negative Overvoltage Protection;
NCP370_11
型号: NCP370_11
厂家: ONSEMI    ONSEMI
描述:

Positive and Negative Overvoltage Protection

文件: 总11页 (文件大小:220K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
NCP370  
Positive and Negative  
Overvoltage Protection  
with Internal Low RON  
N-MOSFETs and Reverse  
Charge Control Pin  
http://onsemi.com  
MARKING  
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 WallAdapter to the system. In this mode the  
system is both positive and negative overvoltage 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  
DIAGRAM  
NCAI  
370  
1
12 PIN LLGA  
MU SUFFIX  
CASE 513AK  
ALYWG  
G
up, the V turns on 30 ms after the V exceeds the undervoltage  
threshold.  
out  
in  
A
L
Y
W
G
= Assembly Location  
= Wafer Lot  
= Year  
= Work Week  
= PbFree Package  
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.  
(Note: Microdot may be in either location)  
1
2
3
4
5
6
12  
11  
IN  
IN  
NC  
OUT  
FLAG  
DIR  
The NCP370 provides a negative going flag (FLAG) output which  
alerts the system that a fault has occurred.  
In addition, the device has ESDprotected input (15 kV Air) when  
10  
9
GND  
RES  
RES  
RES  
NCP370  
bypassed with a 1 mF or larger capacitor.  
8
REV  
Ilim  
7
Features  
Overvoltage Protection Up to 28 V  
Negative Voltage Protection Down to 28 V  
Reverse Charge Control: REV  
Direct Charge Control: DIR  
Overcurrent Protection  
(Top View)  
ORDERING INFORMATION  
Device  
Package  
Shipping  
NCP370MUAITXG LLGA12  
2500 / Tape &  
Reel  
(PbFree)  
Thermal Shutdown  
Onchip Low R  
NMOS Transistors: Typical 130 mW  
†For information on tape and reel specifications,  
including part orientation and tape sizes, please  
refer to our Tape and Reel Packaging Specification  
Brochure, BRD8011/D.  
DS(on)  
Overvoltage Lockout (OVLO)  
Undervoltage Lockout (UVLO)  
SoftStart  
Typical Applications  
Alert FLAG Output  
Cell Phones  
Compliance to IEC6100042 (Level 4)  
Camera Phones  
8 kV (Contact)  
15 kV (Air)  
Digital Still Cameras  
Personal Digital Applications  
MP3 Players  
ESD Ratings: Machine Model = B  
Human Body Model = 2  
12 Lead TLLGA 3x3 mm Package  
This is a PbFree Device  
© Semiconductor Components Industries, LLC, 2011  
1
Publication Order Number:  
July, 2011 Rev. 6  
NCP370/D  
NCP370  
10k  
Charger  
NCP370  
Wall Adapter  
1
2
3
4
5
6
12  
11  
10  
9
IN  
NC  
OUT  
FLAG  
1mF  
IN  
FLAG  
DIR  
GND  
RES  
RES  
RES  
System  
DIR  
8
REV  
REV  
7
Ilim  
FLAG  
DIR  
LI+BATTERY  
4.7mF  
R
limit  
REV  
GND  
Figure 1. Typical Application Circuit  
FUNCTIONAL BLOCK DIAGRAM  
INPUT  
OUTPUT  
Gate Driver and Reverse OCP  
Logic  
REV  
I
lim  
VREF  
Charge  
Pump  
Control  
Logic  
and  
EN  
Block  
UVLO  
OVLO  
Timer  
FLAG  
Thermal  
Shutdown  
GND  
DIR  
Figure 2. Functional Block Diagram  
http://onsemi.com  
2
NCP370  
PIN FUNCTION DESCRIPTION  
Pin  
Name  
Type  
Description  
1, 2  
IN  
POWER  
Input voltage pins. These pins are connected to the power supply. A 1 mF low ESR ceramic capacitor, or  
larger, must be connected between these pins and GND. The two IN pins must be hardwired to common  
supply.  
3
4
5
6
7
GND  
RES  
RES  
RES  
Ilim  
POWER  
INPUT  
Main Ground  
Reserved pin. This pin must be connected to GND.  
Reserved pin. This pin must be connected to GND.  
Reserved pin. This pin must be connected to GND.  
INPUT  
INPUT  
OUTPUT  
Current Limit Pin. This pin provides the reference, based on the internal bandgap voltage reference, to  
limit the over current, across internal NMOSFETs, from battery to external accessory. A 1% tolerance,  
or better, resistor shall be used to get the highest accuracy of the overcurrent limit.  
8
9
REV  
DIR  
INPUT  
INPUT  
Reverse Charge Control Pin. In combination with DIR, the internal NMOSFETs are turned on if Battery  
is applied on the OUT pin (See Tables 1 & 2). In reverse mode, the internal overcurrent protection is  
activated. When reverse mode is disabled, the NCP370 current consumption, into OUT pin, is drastically  
decreased to limit battery discharge.  
Direct Mode Pin. In combination with REV, the internal NMOSFETs are turned on if a wall adapter  
ACDC is applied on the IN pins (See Tables 1 & 2). The device enters in shutdown mode when this pin  
is tied to a high level and the REV pin is tied to high. In this case the output is disconnected from input.  
The state of this pin does not have an impact on the fault detect of the FLAG pin.  
10  
11  
FLAG  
OUT  
OUTPUT  
OUTPUT  
Fault Indication Pin. This pin allows an external system to detect fault condition. The pin goes low when  
input voltage exceeds OVLO threshold or drops below UVLO threshold, charge current from battery to  
accessory exceeds current limit or internal temperature exceeds thermal shutdown limit. Since the pin is  
open drain functionality, an external pull up resistor to VBat must be added (10 kW minimum value).  
Output Voltage Pin. This pin follows IN pins when “no input fault” is detected. The output is disconnected  
from the V power supply when the input voltage is under the UVLO threshold or above OVLO threshold  
IN  
or thermal shutdown limit is exceeded.In Reverse Mode, the device is supplied across OUT pin.  
12  
13  
NC  
NC  
Not Connected  
PAD1  
POWER  
The PAD1 is used to dissipate the internal MOSFET thermal energy and must be soldered to an isolated  
PCB area. The area mustn’t be connected to any other potential than complete isolated one. See PCB  
recommendations on page 9.  
MAXIMUM RATINGS  
Rating  
Symbol  
Vmin  
Value  
Unit  
V
Minimum Voltage (IN to GND)  
30  
in  
Minimum Voltage (All others to GND)  
Maximum Voltage (IN to GND)  
Vmin  
0.3  
V
Vmax  
30  
V
in  
Maximum Voltage (OUT to GND)  
Maximum Voltage (All others to GND)  
Thermal Resistance, JunctiontoAir, (Note 1)  
Operating Ambient Temperature Range  
Storage Temperature Range  
Vmax  
10  
7
V
out  
Vmax  
R
V
200  
°C/W  
°C  
°C  
°C  
q
JA  
T
A
40 to +85  
65 to +150  
150  
T
STG  
Junction Operating Temperature  
T
J
ESD Withstand Voltage (IEC 6100042)  
Human Body Model (HBM), Model = 2, (Note 2)  
Machine Model (MM) Model = B, (Note 3)  
Vesd  
15kV air, 8kV contact  
kV  
V
V
2000V  
200V  
Moisture Sensitivity  
MSL  
Level 1  
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the  
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect  
device reliability.  
1. The R  
is highly dependent on the PCB heat sink area (connected to PAD1). See PCB recommendation paragraph.  
q
JA  
2. Human Body Model, 100 pF discharged through a 1.5 kW resistor following specification JESD22/A114.  
3. Machine Model, 200 pF discharged through all pins following specification JESD22/A115.  
http://onsemi.com  
3
 
NCP370  
ELECTRICAL CHARACTERISTICS (V = 5 V, Minimum/Maximum limits at 40°C < T < +85°C unless otherwise noted. Typical  
in  
A
values are at T = +25°C)  
A
Characteristics  
Input Voltage Range  
Symbols  
Conditions  
Disable, Direct and Enhance Modes, V = 0 V  
Min  
28  
24  
2.5  
Typ  
Max  
Unit  
V
V
in  
28  
out  
Input Voltage  
Vin  
Disable, Direct and Enhance Modes, V = 4.25V  
V
min  
out  
Output Voltage Range  
Undervoltage Lockout Threshold  
V
out  
Reverse Mode  
5.5  
2.8  
V
UVLO  
Vin falls below UVLO Threshold  
(Disable, Direct and Enhance Modes)  
2.6  
2.7  
60  
V
Undervoltage Lockout Hysteresis  
UVLO  
V
in  
rises above UVLO Threshold + UVLO  
hyst  
45  
75  
mV  
hyst  
Over voltage Lockout Threshold  
NCP370MUAITXG  
OVLO  
V rises above OVLO threshold  
in  
(Disable and Direct Modes)  
6.3  
60  
6.6  
80  
6.9  
100  
8.6  
V
mV  
V
Overvoltage Lockout Hysteresis  
Over System Voltage Lockout  
OVLO  
V
falls below to OVLO OVLO  
hyst  
hyst  
in  
OVLO  
V
in  
rises above OVLO Threshold Enhanced  
7.9  
8.27  
00  
00  
Mode @ 25°C  
Overvoltage Lockout Hysteresis  
OVLO  
V
falls below to OVLO OVLO @ 25°C  
00hyst  
80  
100  
130  
145  
220  
mV  
00hyst  
in  
00  
V
in  
to V Resistance  
R
DS(on)  
V
= 5 V, Direct Mode, Load Connected to V  
out  
mW  
out  
in  
V
= 5 V, Direct Mode,  
in  
Load Connected to V @ 25°C  
130  
130  
200  
220  
out  
V
out  
to V Resistance  
R
DS(on)  
V = 5 V, Reverse Mode, Accessory  
out  
mW  
in  
Connected to V  
in  
V
out  
= 5 V, Reverse Mode, Accessory  
130  
200  
Connected to V @ 25°C  
in  
Input Standby Current  
Input Supply Quiescent Current  
Output Standby Current  
Reverse Mode current  
Minimum DC Current  
Idd  
No Load. Disable Mode, V connected  
140  
200  
0.02  
200  
200  
280  
1.0  
mA  
mA  
mA  
mA  
A
STD  
in  
Idd  
No Load. Direct Mode  
IN  
STDOUT  
Idd  
Idd  
Rin = 10 kW, V = 5.5 V, Disable Mode  
out  
No Accessory, V = 4.2 V, Reverse Mode  
315  
REV  
out  
I
Output Load, V = 5.5 V, Direct  
1.3  
1.3  
CHG  
in  
I
Accessory, V = 5.5 V, Reverse Modes  
out  
REV  
Overcurrent Threshold  
Overcurrent Response  
FLAG Output Low Voltage  
I
V
out  
= 4.2 V, Load on V , Reverse Mode, R  
1.35  
1.75  
7.0  
30  
2.10  
A
%
OCP  
in  
ILIM  
= 0 W, 1 A/1 ms  
I
Direct Accessory Short, Reverse Mode,  
= 4.2 V, I = 1.6 A  
acc  
V
out  
lim  
Vol  
1.2 V < V < UVLO  
400  
mV  
flag  
in  
Sink 50 mA on FLAG Pin  
V
> OVLO, Sink 1 mA on FLAG Pin  
400  
400  
in  
I
> I , Sink 1 mA on FLAG Pin  
lim  
reverse  
FLAG Leakage Current  
DIR Voltage High  
FLAG  
FLAG Level = 5.5 V  
1.0  
nA  
V
leak  
V
ihDIR  
1.2  
1.2  
DIR Voltage Low  
V
ilDIR  
0.55  
0.55  
V
DIR Leakage Current  
DIR  
V
or V connected  
200  
1.0  
nA  
leak  
in  
out  
V
and V disconnected  
in  
out  
REV Voltage High  
REV Voltage Low  
REV Leakage Current  
V
ihREV  
V
V
V
ilREV  
REV  
V
or V connected  
200  
1.0  
nA  
leak  
in  
out  
V
in  
and V disconnected  
out  
Thermal Shutdown Temperature  
Thermal Shutdown Hysteresis  
T
150  
30  
°C  
°C  
SD  
T
SDHYST  
http://onsemi.com  
4
NCP370  
Characteristics  
Symbols  
Conditions  
Min  
Typ  
Max  
Unit  
TIMINGS  
DIRECT MODE  
Start Up Delay  
t
From V > UVLO to V w 0.3 V  
20  
20  
30  
30  
40  
40  
ms  
ms  
ms  
on  
in  
out  
FLAG Going Up Delay  
Turn Off Delay  
t
From V > 0.3 V to FLAG = 1.2 V  
start  
out  
t
From V > OVLO to V v 0.3 V  
1.5  
5.0  
off  
in  
out  
V
Increasing from 5 V to 8 V at 3 V/ms  
in  
Alert Delay  
t
From V > OVLO to FLAG v 0.4 V See Figure  
1.5  
2.5  
ms  
ms  
stop  
in  
3 and 9 V Increasing from 5 V to 8 V at 3 V/ms  
in  
Disable Time  
t
REV = 1.2 V, From DIR = 0.4 V to 1.2 V to V  
dis  
out  
v 0.3 V  
REVERSE MODE  
Reverse Start Up Delay  
ton  
V
out  
w 2.5 V, From REV = 1.2 to 0.55 to  
0.6  
1.2  
1.8  
ms  
REV  
V
in  
w 0.3 V, Reverse Mode  
Reverse FLAG Going Up Delay  
Rearming Reverse Delay  
Over Current Regulation Time  
OCP Delay Time  
tstart  
From V w 0.3 V FLAG = 1.2 V, Reverse Mode  
0.6  
20  
1.2  
30  
1.8  
40  
ms  
ms  
ms  
ms  
REV  
in  
t
t
t
V
> 2.5 V, R = 1 W, Reverse Mode  
RRD  
out in  
V
out  
> 2.6, V > 0.3 V, Reverse Mode  
0.5  
1.2  
5
1.8  
REG  
OCP  
in  
From I  
> I , 1 A/1 ms  
lim  
reverse  
Reverse Disable Time  
t
From REV = 0.55 V to 1.2 V, to V < 0.3 V.  
200  
ms  
REVDIS  
in  
V
= 5 V  
out  
NOTE: Electrical parameters are guaranteed by correlation across the full range of temperature.  
TYPICAL OPERATING CHARACTERISTICS  
Operation  
Overvoltage Lockout (OVLO)  
The NCP370 provides overvoltage protection for positive  
and negative voltages, up to 28 V or down to 28 V on  
IN pins. At powerup, with DIR pin = low, REV = high, the  
output rises 30 ms after the input rises above the UVLO. The  
NCP370 provides a FLAG output, which alerts the system  
that a fault has occurred. The FLAG signal rises 30 ms after  
the output signal rises.  
To protect connected systems on Vout pin from  
overvoltage, the device has a builtin overvoltage lock out  
(OVLO) circuit. During overvoltage condition, the output is  
disabled as long as the input voltage exceeds OVLO.  
Additional OVLO thresholds can be manufactured  
(Please contact your ON Semiconductor representative for  
availability).  
A Reverse Mode is available when an accessory is  
connected on IN pins and the internal battery is applied on  
the OUT pin, allowing the accessory to be powered. In this  
mode, no supply must be connected on IN pins and REV pin  
must be tied to low level. The NCP370 provides overcurrent  
protection for the battery from current faults in the  
accessory.  
FLAG output will be low since V is higher than OVLO.  
This circuit has a 80 mV hysteresis to provide noise  
immunity to transient conditions.  
in  
Oversystem Voltage Lockout (OVLO00  
)
A second overvoltage comparator is available for  
supplying the sytem (output) by the Wall Adaptor (input) by  
setting DIR = low and REV = low. The R  
will be  
DS(on)  
higher during this mode allowing to handle few 10 mA  
Undervoltage Lockout (UVLO)  
.
To ensure proper turnon operation from AC/DC (or Wall  
adapter charging) under any conditions, the device has a  
builtin undervoltage lock out (UVLO) circuit. During  
This additional comparator allows to put higher input  
voltage (OVLO = 8.27 V typical) on the NCP370 during test  
production sequence (I.E: One Time Programming of the  
cell phone, PDA). This parameter is 25°C guaranteed only.  
positive going slope on V , the output remains disconnected  
in  
from input until V voltage is above UVLO. The FLAG  
in  
FLAG Output  
output will be low as long as V has not reached UVLO  
in  
The NCP370 provides a FLAG output which alerts that a  
fault has occurred. As soon as a fault state is detected by the  
NCP370 (see Figure 3), the FLAG pin output goes low,  
alerting the microcontroller to take appropriate action.  
threshold. This circuit has a 60 mV hysteresis to provide  
noise immunity to transient conditions.  
In Reverse Mode (REV pin v 0.55 V, DIR w 1.2 V),  
UVLO and OVLO comparators are inactivated.  
http://onsemi.com  
5
NCP370  
The FLAG pin goes low as soon the input voltage exceeds  
the OVLO threshold or falls below the UVLO threshold.  
therefore a pull up resistor (typically 1 MW, minimum  
10 kW) must be connected to Battery. The FLAG level will  
When the V level recovers normal condition, FLAG goes  
always reflect V status, even if the device is turned off (DIR  
in  
in  
high after a time delay, t  
(see Figure 3), following the V  
= 1 and REV = 1).  
start  
out  
response. The FLAG pin is an open drain output and  
V
in  
OVLO  
UVLO  
V
out  
FLAG  
DIR  
t
dis  
REV  
> 1.2 V  
t
on  
t
t
off  
t
on  
t
start  
start  
t
stop  
Figure 3. FLAG Pin in AC/DC Charging Mode  
During over thermal condition (T° >T° ), output is  
overvoltage condition, overcurrent condition or thermal  
shutdown condition.  
J
SD  
disconnected from input, and FLAG pin goes low.  
In Reverse Mode, FLAG pin remains available, allowing  
the microcontroller to appropriately process the  
http://onsemi.com  
6
 
NCP370  
V
in  
ton  
rev  
V
out  
Battery  
Output  
FLAG  
DIR  
REV  
microcontroller  
microcontroller  
External Accessory ID = 1  
Figure 4. FLAG status in Reverse Mode  
Table 1. FLAG TABLE  
FLAG  
Status  
DIR  
REV  
IN  
1.5 < V < UVLO or  
OUT  
Pass Element (Dual NMOS FET)  
0
0
Hiz  
Low  
Open  
in  
V
> OVLO  
in  
oo  
0
0
0
1
UVLO < V < OVLO  
= V DROPOUT  
High  
Low  
Close  
Open  
in  
oo  
in  
1.5 < V < UVLO or  
Hiz  
in  
V
in  
> OVLO  
0
1
1
1
0
1
UVLO < V < OVLO  
= V DROPOUT  
High  
High  
Low  
Close  
Close  
Open  
in  
in  
= V DROPOUT  
V
out  
> 2.5 V  
Hiz  
out  
1.5 < V < UVLO or  
in  
V
in  
> OVLO  
1
1
UVLO < V < OVLO  
Hiz  
High  
Open  
in  
DIR Input  
Table 2. TABLE SELECTION OF CHARGE MODES  
To enable Direct Charge operation (Direct Mode), the  
DIR pin shall be forced to low and REV to high. A high level  
on the DIR pin disconnects OUT pin from IN pin. DIR does  
not override an OVLO or UVLO fault (FLAG status is still  
available).  
DIR  
0
REV  
Mode  
0
1
0
1
Enhance Mode  
Direct Mode  
Reverse Mode  
Disable Mode  
0
1
1
http://onsemi.com  
7
NCP370  
Negative Voltage and Reverse Current.  
The device protects the downstream side from negative  
voltage occurring on the IN pin, down to 28 V. When a  
negative voltage occurs, the output is disconnected from the  
IN pins.  
By adding external resistors in series from I to GND,  
the OCP value is lowered. The typical overcurrent threshold  
can be calculated with the following formula;  
lim  
R
(kW) = (60 / I ) 36  
OCP  
ilim  
Reverse Mode  
In Reverse Mode, an external accessory plugged into the  
bottom connector can be powered by the internal battery of  
the system.  
To access to the reverse mode, DIR pin must be tied high  
(> 1.2) and REV must be tied high to low (< 0.55 V).  
In this case, the core of the NCP370 will be supplied by  
the battery, with a 2.5 V minimum voltage and 5.5 V  
maximum voltage.  
In this reverse state, both OCP and thermal modes are  
available.  
Overcurrent Protection (OCP)  
This device integrates the reverse over current protection  
function, from battery to external accessory.  
That means the current across the internal NMOS is  
Figure 5. Reverse Mode Overcurrent Protection vs.  
ILIM Resistance, RLIMIT  
limited when the value, set by the external R  
resistor,  
limit  
During an overcurrent event, the NMOSFETs turn off  
exceeds I  
.
OCP  
and FLAG output goes low, allowing the microcontroller  
to process the fault event and then disable reverse charge  
path.  
An internal resistor is placed in series with the I pin  
lim  
allowing a maximum OCP value when I pin is directly  
lim  
connected to GND.  
http://onsemi.com  
8
NCP370  
At power up (accessory is plugged on input pins), the  
current is limited up to I for 1.2 ms (typical), to allow  
After 1 ms following the plug in of the accessory, the OCP  
mode is engaged. See Figure 6.  
lim  
capacitor charge and limit inrush current. If the I  
lim  
threshold is exceeded over 1.2 ms, the device enters  
OCP burst mode until the overcurrent event disappears.  
V
out  
V
in  
ton  
REV  
tstart  
REV  
FLAG  
t
REG  
I
I
lim  
REV  
REV  
ID  
t
RRD  
Accessory ID  
Detection  
Drive Current in Accessory  
DIR  
Figure 6. Overcurrent Protection Sequence  
Thermal Shutdown Protection  
PCB Recommendations  
In case of internal overheating, the integrated thermal  
shutdown protection turns off the internal MOSFETs in  
order to instantaneously decrease the device temperature.  
The thermal threshold has been set at 150°C FLAG then  
goes low to inform the MCU.  
As the thermal hysteresis is 30°C, the MOSFETs will turn  
on as soon the device temperature falls below 120°C.  
If the fault event is still present, the temperature increase  
engages the thermal shutdown again until the fault event  
disappears.  
Since the NCP370 integrates the 1. 3A NMOSFETs,  
PCB rules must be respected to properly evacuate the heat  
out of the silicon.  
From an applications standpoint, PAD1 of the NCP370  
package should be connected to an isolated PCB area to  
increase the heat transfer if necessary.  
In any case, PAD1 should be not connected to any other  
potential or GND other than the isolated extra copper  
surface.  
To assist in the design of the transfer plane connected to  
PAD1, Figure 7 shows the copper area required with respect  
to R  
.
qJA  
http://onsemi.com  
9
 
NCP370  
250  
200  
150  
100  
50  
2.5  
2
Power Curve with  
PCB cu thk 2 oz  
1.5  
1
Power Curve with  
PCB cu thk 1 oz  
qJA Curve with  
PCB cu thk 2 oz  
qJA Curve with  
PCB cu thk 1 oz  
0.5  
0
0
0
100  
200  
300  
400  
500  
600  
700  
2
COPPER HEAT SPREAD AREA (mm )  
Figure 7. Copper heat Spread Area  
ESD Tests  
RDS(on) and Dropout  
The NCP370 conforms to the IEC6100042, level 4 on  
the Input pin. A 1 mF (I.E Murata GRM188R61E105KA12D)  
must be placed close to the IN pins. If the IEC6100042 is  
not a requirement, a 100 nF/25 V must be placed between IN  
and GND.  
The above configuration supports 15 kV (Air) and 8 kV  
(Contact) at the input per IEC6100042 (level 4).  
Please refer to Figure 8 for the IEC6100042  
electrostatic discharge waveform.  
The NCP370 includes two internal low R  
NMOSFETs to protect the system, connected on OUT pin,  
from overvoltage, negative voltage and reverse current  
DS(on)  
protection. During normal operation, the  
characteristics of the NMOSFETs give rise to low losses on  
pin.  
R
DS(on)  
V
out  
As example: R  
= 800 mA.  
= 8 W, Vin= 5 V. R  
= 155 mW. I  
out  
load  
DS(on)  
V
= 4.905 V  
out  
2
2
NMOS Losses = R  
x I  
= 0.155 x 0.8 = 0.0992 W  
DS(on)  
out  
Figure 8. Ipeak = f(t)/IEC6100042  
http://onsemi.com  
10  
NCP370  
PACKAGE DIMENSIONS  
LLGA12 3x3, 0.5P  
CASE 513AK01  
ISSUE O  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER  
ASME Y14.5M, 1994.  
B
E
A
D
2. CONTROLLING DIMENSION: MILLIMETERS.  
3. DIMENSION b APPLIES TO PLATED  
TERMINAL AND IS MEASURED BETWEEN  
0.15 AND 0.30 MM FROM TERMINAL TIP.  
4. COPLANARITY APPLIES TO THE EXPOSED  
PAD AS WELL AS THE TERMINALS.  
PIN ONE  
REFERENCE  
MILLIMETERS  
DIM MIN  
MAX  
0.60  
0.05  
0.30  
2X  
A
A1  
b
0.50  
0.00  
0.20  
0.15  
C
2X  
D
3.00 BSC  
D2  
E
E2  
e
2.60  
3.00 BSC  
1.90  
0.50 BSC  
2.80  
0.15  
C
TOP VIEW  
2.10  
K
L
0.20  
0.25  
−−−  
0.35  
0.10  
0.08  
C
C
A
12X  
SOLDERING FOOTPRINT*  
A1  
SEATING  
PLANE  
SIDE VIEW  
D2  
C
3.30  
12X  
0.50  
1
e
0.50  
PITCH  
6
1
0.43  
2.75  
12X K  
E2  
11X  
0.30  
2.05  
12  
7
12X  
0.10  
0.05  
C
C
A
B
DIMENSIONS: MILLIMETERS  
12X L  
b
NOTE 3  
*For additional information on our PbFree strategy and soldering  
details, please download the ON Semiconductor Soldering and  
Mounting Techniques Reference Manual, SOLDERRM/D.  
BOTTOM VIEW  
ON Semiconductor and  
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice  
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability  
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.  
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All  
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent  
rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other  
applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur.  
Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries,  
affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury  
or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an  
Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.  
PUBLICATION ORDERING INFORMATION  
LITERATURE FULFILLMENT:  
N. American Technical Support: 8002829855 Toll Free  
USA/Canada  
Europe, Middle East and Africa Technical Support:  
Phone: 421 33 790 2910  
Japan Customer Focus Center  
Phone: 81357733850  
ON Semiconductor Website: www.onsemi.com  
Order Literature: http://www.onsemi.com/orderlit  
Literature Distribution Center for ON Semiconductor  
P.O. Box 5163, Denver, Colorado 80217 USA  
Phone: 3036752175 or 8003443860 Toll Free USA/Canada  
Fax: 3036752176 or 8003443867 Toll Free USA/Canada  
Email: orderlit@onsemi.com  
For additional information, please contact your local  
Sales Representative  
NCP370/D  

相关型号:

NCP3712ASN

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT1

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT1/D

Over Voltage Protected High Side Switch
ETC

NCP3712ASNT1G

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT1_06

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT1_14

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT3

Over Voltage Protected High Side Switch
ONSEMI

NCP3712ASNT3G

Over Voltage Protected High Side Switch
ONSEMI

NCP372

Positive and Negative Overvoltage Protection Controller with Internal Low Ron NMOS FETs and Status FLAG
ONSEMI

NCP372MUAITXG

Positive and Negative Overvoltage Protection Controller with Internal Low Ron NMOS FETs and Status FLAG
ONSEMI

NCP373

Load Switch Function
ONSEMI

NCP373MU04TXG

Load Switch Function
ONSEMI