NR111E (SMPS : IC95)
NR111E Pin Discriptions
NR111E Block Diagram
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
SANKEN ELECTRIC CO., LTD.
Oct/23/2012
Rev.1.0
6
http://www.sanken-ele.co.jp
Pin Assignments & Functions
Pin Assignments
Pin Functions
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1
BS
High-side Boost input.
BS supplies the drive for High-side Nch-MOSFET switch.
Connect a capacitor and a resistor between SW to BS.
2
IN
Power input. IN supplies the power to the IC as well as the regulator switches
3
SW
Power switching output.
SW supplies power to the output.
Connect the LC filter from SW to the output.
Note that a capacitor is required from SW to BS to supply the power the High-side
switch
4
GND
Ground
Connect the exposed pad to Pin No.4
5
FB
Feedback input Pin to compare Reference Voltage. The feedback threshold is 0.8V.
To set the output voltage, FB Pin is required to connect between resistive voltage
divider R4 and R6.
6
ISET
Adjust Pin of OCP starting current
OCP
starting current can be adjusted by connecting a resistor to ISET Pin.
In the case of using at Maximum Io, ISET Pin is required to connect to GND.
7
EN
Enable input.
Drive EN Pin high to turn on the regulator, low to turn it off.
8
SS
Soft-Start control input.
To set the soft-start period, connect to a capacitor between GND.
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
SANKEN ELECTRIC CO., LTD.
Oct/23/2012
Rev.1.0
6
http://www.sanken-ele.co.jp
Pin Assignments & Functions
Pin Assignments
Pin Functions
n
o
it
p
ir
c
s
e
D
l
o
b
m
y
S
.
o
N
n
i
P
1
BS
High-side Boost input.
BS supplies the drive for High-side Nch-MOSFET switch.
Connect a capacitor and a resistor between SW to BS.
2
IN
Power input. IN supplies the power to the IC as well as the regulator switches
3
SW
Power switching output.
SW supplies power to the output.
Connect the LC filter from SW to the output.
Note that a capacitor is required from SW to BS to supply the power the High-side
switch
4
GND
Ground
Connect the exposed pad to Pin No.4
5
FB
Feedback input Pin to compare Reference Voltage. The feedback threshold is 0.8V.
To set the output voltage, FB Pin is required to connect between resistive voltage
divider R4 and R6.
6
ISET
Adjust Pin of OCP starting current
OCP
starting current can be adjusted by connecting a resistor to ISET Pin.
In the case of using at Maximum Io, ISET Pin is required to connect to GND.
7
EN
Enable input.
Drive EN Pin high to turn on the regulator, low to turn it off.
8
SS
Soft-Start control input.
To set the soft-start period, connect to a capacitor between GND.
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
SANKEN ELECTRIC CO., LTD.
Oct/23/2012
Rev.1.0
6
http://www.sanken-ele.co.jp
Pin Assignments & Functions
Pin Assignments
Pin Functions
n
o
it
p
ir
c
s
e
D
l
o
b
m
y
S
.
o
N
n
i
P
1
BS
High-side Boost input.
BS supplies the drive for High-side Nch-MOSFET switch.
Connect a capacitor and a resistor between SW to BS.
2
IN
Power input. IN supplies the power to the IC as well as the regulator switches
3
SW
Power switching output.
SW supplies power to the output.
Connect the LC filter from SW to the output.
Note that a capacitor is required from SW to BS to supply the power the High-side
switch
4
GND
Ground
Connect the exposed pad to Pin No.4
5
FB
Feedback input Pin to compare Reference Voltage. The feedback threshold is 0.8V.
To set the output voltage, FB Pin is required to connect between resistive voltage
divider R4 and R6.
6
ISET
Adjust Pin of OCP starting current
OCP
starting current can be adjusted by connecting a resistor to ISET Pin.
In the case of using at Maximum Io, ISET Pin is required to connect to GND.
7
EN
Enable input.
Drive EN Pin high to turn on the regulator, low to turn it off.
8
SS
Soft-Start control input.
To set the soft-start period, connect to a capacitor between GND.
80
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