NCP4200MNR2G ON Semiconductor, NCP4200MNR2G Datasheet - Page 17

• Manufacturer Part Number: NCP4200MNR2G
• Description: IC CONV SYNC BUCK PMBUS 40QFN
• Manufacturer: ON Semiconductor

Specifications of NCP4200MNR2G

• Applications: Converter, Intel VR11, VR11.1
• Voltage - Input: 1.7 ~ 24 V
• Number Of Outputs: 1
• Voltage - Output: 0.375 ~ 1.8 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-VFQFN Exposed Pad
• Output Voltage: 0.375 V to 1.6 V
• Output Current: 500 uA
• Input Voltage: 1.7 V to 24 V
• Switching Frequency: 0.25 MHz to 6 MHz
• Operating Temperature Range: 0 C to + 85 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Isolated/non-isolated: Non Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Equation:
V
(if the 12 V input supply is 12 V ±5%, V
if the 12 V input supply is 12 V ±10%, V
V
is specified as 4.75 V.
R
The CECC standard specification for power rating in
surface−mount resistors is: 0603 = 0.1 W, 0805 = 0.125 W,
1206 = 0.25 W.
I
Interface. The NCP4200 is connected to this bus as a slave
device, under the control of a master controller.
pulses: eight bits of data followed by an acknowledge bit
from the slave device. Transitions on the data line must
occur during the low period of the clock signal and remain
stable during the high period, because a low−to−high
transition when the clock is high might be interpreted as a
stop signal. The number of data bytes that can be transmitted
over the serial bus in a single read or write operation is
limited only by what the master and slave devices can
handle.
conditions are established. In write mode, the master pulls
2
SHUNT
C Interface
IN(MAX)
CC(MIN)
Figure 10. Typical Shunt Resistor Value and Power
The maximum power dissipated is calculated using
Control of the NCP4200 is carried out using the I
Data is sent over the serial bus in sequences of nine clock
When all data bytes have been read or written, stop
400
350
300
250
200
150
where:
8
Dissipation for Different UVLO Voltage
is the shunt resistor value.
is the minimum V
is the maximum voltage from the 12 V input supply
P
9
MAX
10
+
11
V
ICC (UVLO)
IN(MAX)
12
CC
R
SHUNT
* V
voltage of the NCP4200. This
13
CC(MIN)
14
IN(MAX)
IN(MAX)
15
2
Rshunt
Pshunt
2−0603 Limit
2−0805 Limit
16
0.3
0.25
0.2
= 12.6 V;
0.325
0.275
0.225
0.175
= 13.2 V).
(eq. 12)
http://onsemi.com
2
C
17
the data line high during the tenth clock pulse to assert a stop
condition. In read mode, the master device overrides the
acknowledge bit by pulling the data line high during the low
period before the ninth clock pulse; this is known as No
Acknowledge. The master takes the data line low during the
low period before the tenth clock pulse, and then high during
the tenth clock pulse to assert a stop condition.
serial bus in one operation, but it is not possible to mix read
and write in one operation because the type of operation is
determined at the beginning and cannot subsequently be
changed without starting a new operation.
three bytes, and read operations contain one or two bytes.
The command code or register address determines the
number of bytes to be read or written, See the Register Map
for more information.
data from it, the address pointer register must be set so that
the correct data register is addressed (i.e. command code),
and then data can be written to that register or read from it.
The first byte of a read or write operation always contains an
address that is stored in the address pointer register. If data
is to be written to the device, the write operation contains a
second data byte that is written to the register selected by the
address pointer register.
device address is sent over the bus, and then R/W is set to 0.
This is followed by two data bytes. The first data byte is the
address of the internal data register to be written to, which
is stored in the address pointer register. The second data byte
is the data to be written to the internal data register.
Any number of bytes of data can be transferred over the
In the NCP4200, write operations contain one, two or
To write data to one of the device data registers or read
This write byte operation is shown in Figure 12. The
1. The read byte operation is shown in Figure 13.
2. It is not possible to read or write a data byte from a
3. In addition to supporting the send byte, the
First the command code needs to be written to the
NCP4200 so that the required data is sent back.
This is done by performing a write to the
NCP4200 as before, but only the data byte
containing the register address is sent, because no
data is written to the register. A repeated start is
then issued and a read operation is then performed
consisting of the serial bus address; R/W bit set to
1, followed by the data byte read from the data
register.
data register without first writing to the address
pointer register, even if the address pointer register
is already at the correct value.
NCP4200 also supports the read byte, write byte,
read word and write word protocols.