Light Load High Efficiency, 31V, Buck Regulator
NR110E series
General Descriptions
The NR110E series is buck regulator ICs integrates
High-side power MOSFET. The feature increasing
efficiency at light loads allows the device to be used in
the energy-saving applications. With the current mode
control, ultra low ESR capacitors such as ceramic
capacitors can be used. The ICs have protection functions
such as Over-Current Protection (OCP), Under-Voltage
Lockout (UVLO) and Thermal Shutdown (TSD). An
adjustable Soft-Start by an external capacitor prevents the
excessive inrush current at turn-on. The ICs integrate
phase compensation circuit which reduces the number of
external components and simplifies the design of
customer application. The ON/OFF pin (EN Pin) turns
the regulator on or off and helps to achieve low power
consumption requirements. The NR110E series is
available in an 8-pin SOIC package with an exposed
thermal pad on the back side.
Jun. 21, 2016
Package
Exposed SOIC 8
Thermally enhanced 8-Pin package
Features & Benefits
Current mode PWM control
Up to 94% Efficiency,
Up to 68% Efficiency at I
O
= 20mA Light Load
Adjustable “Over Current Protection（OCP）”
Current mode PWM control
Stable with low ESR ceramic output capacitors
Built-in protection function
Over Current Protection (OCP)
Thermal Shutdown (TSD)
Under Voltage Lockout (UVLO)
Built-in phase compensation
Adjustable Soft-Start with an external capacitor
Turn ON/OF the regulator function
Electrical Characteristics
Operating input range V
IN
= 6.5V½31V
Output adjustable V
O
= 0.8V½24V
2A / 4A output current
Fixed 350kHz frequency：NR111E
Fixed 364kHz frequency：NR119E
Applications
LCD TV / Blu-Ray / Set top box
Home appliance
Green Electronic products
Other power supply
Typical Application Circuit
C1, C2: 10μF / 35V
C4, C5: 22μF / 16V
C7: 0.1μF
C3: 0.1μF
Rev.1.4
R1: 510kΩ
L1: 10μH
R3: 22Ω(*Option)
D1: SJPW-T4(Sanken)
R4: 18kΩ, R5: 2.7kΩ (Vo=5.0V)
R6: 3.9kΩ
R9:adjust
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
1
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
Series Lineup
Product No.
NR111E
f
SW
350kHz
V
IN
6.5V to 31V
(1)
Jun. 21, 2016
V
O
0.8V to 24V
(2)
I
O
4A
2A
NR119E
364kHz
(1)
The minimum input voltage shall be either of 6.5V or V
O
+3V, whichever is higher.
(2)
The I/O condition limited by the Minimum on-time (T
ON(MIN)
).
Absolute Maximum Ratings
Parameter
DC input voltage
BS Pin voltage
BS-SW Pin voltage
SW Pin voltage
FB Pin voltage
EN Pin voltage
SS Pin voltage
Power dissipation
Junction temperature
Storage temperature
Thermal resistance
(junction- Pin No. 4)
Thermal resistance
(junction-ambient air)
(3)
(4)
(3)
Symbol
V
IN
V
BS
V
BS-SW
V
SW
V
FB
V
EN
V
SS
P
D
T
J
T
S
θ
JP
θ
JA
Ratings
35
44
8
35
5.5
35
5.5
1.76
40
to 150
40
to 150
26
71
Units
V
V
V
V
V
V
V
W
°C
°C
°C /W
°C /W
Conditions
Glass-epoxy board mounting
in 30×30mm.
(copper area in a 25×25mm)
Max T
J
=150°C
(4)
Glass-epoxy board mounting
in 30×30mm.
(copper area in 25×25mm)
Limited by thermal shutdown.
The temperature detection of thermal shutdown is about 160°C
Recommended Operating Conditions
Parameter
DC input voltage
DC output current
Output voltage
NR111E
NR119E
(5)
(6)
(7)
Symbol
V
IN
Io
Vo
Ratings
MIN
6.5
0
0
0.8
MAX
31
4.0
2.0
24
Units
V
A
V
Conditions
(7)
Ambient operating temperature
Top
85
°C
40
(5)
The minimum value of input voltage is taken as the larger one of either 6.5V or V
O
+3V.
(6)
Recommended circuit refers to Typical Application Circuit.
(7)
To be used within the allowable package power dissipation characteristics.
Rev.1.4
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
2
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
Electrical Characteristics
Parameter
Reference voltage
Output voltage temperature
coefficient
Switching frequency
Line regulation
Load regulation
NR111E
NR119E
(8)
Jun. 21, 2016
Ta = 25°C
Symbol
V
REF
⊿V
REF
/⊿T
f
SW
V
Line
V
Load
I
S1
Ratings
MIN
0.784
―
280
291
―
―
―
―
―
―
―
0
6
TYP
0.800
±0.05
350
364
50
50
1.5
5.5
0.9
2.8
1
1
10
20
0.7
―
―
T
ON(MIN)
TSD
TSD_hys
―
151
―
1.4
1.5
MAX
0.816
―
420
437
―
―
―
―
Units
V
Test conditions
V
IN
= 12V, I
O
= 1.0A
V = 12V, I
O
= 1.0A
mV/°C
IN
40°C
to +85°C
kHz
mV
mV
V
IN
=12V, V
O
=5.0V,
I
O
=1°
V
IN
=8V to31V, V
O
=5.0V,
I
O
=1°
V
IN
=12V, V
O
=5.0V,
I
O
=0.1 to 2.0A
V
IN
=12V, V
O
=5.0V
ISET=OPEN
V
IN
=12V, V
O
=5.0V
ISET=SHORT
V
IN
=12V, V
O
=5.0V
ISET=OPEN
V
IN
=12V, V
O
=5.0V
ISET=SHORT
V
IN
= 12V
V
EN
=10kΩ pull up to V
IN
V
IN
=12V, I
O
=0A,
V
EN
=0V
V
SS
=0V, V
IN
=12V
V
EN
= 10V
V
IN
=12V
V
IN
=12V
(8)
NR111E
Over current protection
starting current
NR119E
I
S2
Supply Current
Shutdown Supply Current
SS Pin
Source current
at low level
voltage
Sink current
Threshold voltage
Open voltage
(8)
I
S2
I
S1
A
―
―
―
―
14
50
2.1
―
―
―
―
―
ns
°C
°C
mA
μA
μA
μA
V
V
I
IN
I
IN(off)
I
EN/SS
I
EN
V
C/EH
V
ISET
D
MAX
EN Pin
ISET Pin
Max on-duty
90
150
150
165
20
%
NR119E
Thermal shutdown threshold
temperature
Thermal shutdown
restart hysteresis
of temperature
(8)
Guaranteed by design, not tested.
Minimum on-time
NR111E
(8)
(8)
(8)
Rev.1.4
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
3
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
Typical Performance Characteristics
NR111E Typical Performance Characteristics
Efficiency
V
O
=3.3V
Jun. 21, 2016
Efficiency
η [%]
V
IN
=12V
15V
18V
20V
24V
Output Current I
O
[A]
V
O
=5.0V
η [%]
Efficiency
V
IN
=12V
15V
18V
20V
24V
Output Current I
O
[A]
Rev.1.4
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
4
Light Load High Efficiency, 31V, Buck Regulator
NR110E series
NR111E Typical Performance Characteristics
Output startup
V
O
=5.0V, Load = Constant Resistance
Output Voltage V
O
[V]
Output Voltage
[V]
Jun. 21, 2016
Over Current Protection
V
O
=5.0V
V
IN
=12V
15V
18V
20V
24V
ISET=OPEN
ISET=GND
Input Voltage V
IN
[V]
Output Current I
O
[A]
Load Regulation:
V
Load
V
O
=5.0V
Switching frequency [kHz]
Output Voltage
[V]
Switching Frequency:
f
SW
V
O
=5.0V
Output Current I
O
[A]
Output Current I
O
[A]
Shutdown Supply Current:
I
IN(off)
V
EN
=0V
Shutdown Supply Current
[mA]
Iin
Current
[mA]
Supply
[mA]
5.0
4.5
4.0
3.5
3.0
2.5
2.0
Supply Current:
I
IN
V
O
=5.0V
NR114K/115K,NR116K,NR117K IQ
1.5
1.0
0.5
0.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
Input Voltage V
IN
[V]
Output Current I
O
[A]
VIN[V]
Rev.1.4
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
