I
O
= 1 A, V
IN
= 27 V Linear Regulator IC
NR301E, NR302A
Description
NR301E and NR302A are linear regulator ICs whose
maximum output current is 1 A. Output voltage is
adjusted by external resistors. The IC uses the 8 pin
surface mount package with exposed thermal pad.
The IC has various functions including the Output
On/Off Function, the Overcurrent Protection and the
Thermal Shutdown, and achieves a linear regulator
circuit with few external components. In addition, stable
output voltage with ceramic capacitor reduces the
mounting area compared to using electrolytic capacitors.
Data Sheet
Packages
NR301E: eSOIC8
NR302A: HSOP8
Not to scale
Features
● Reducing Mounting Area
Stable with a Ceramic Output Capacitor
● Adjustable Output Voltage (V
OUT
= 1.1 V to 16 V)
● Output On/Off Function
● Protections:
Overcurrent Protection (OCP): Fold-back
Thermal Shutdown (TSD) with Hysteresis: Auto-
restart
Specifications
●
●
●
●
Recomended Input Voltage, V
IN
: 2.7 V to 27 V
Voltage Reference, V
ADJ
: 1.0 V ± 1.5%
Output Current, I
O
: 1.0 A
Typical Dropout Voltage, V
DIF
: 0.6 V
Applications
● Audio Visual Equipment
● Office Automation Equipment
● White Goods
Typical Application
NR301E
NR302A
5
6
VC
NC
NC
VIN
NC
GND
ADJ
VO
4
3
2
1
V
IN
7
8
V
OUT
R1
C
IN
D1
R2
C
OUT
NR301E, NR302A-DSE Rev.2.0
SANKEN ELECTRIC CO., LTD
http://www.sanken-ele.co.jp/en
Apr. 03, 2017
© SANKEN ELECTRIC CO., LTD. 2015
1
NR301E, NR302A
Contents
Description ------------------------------------------------------------------------------------------------------ 1
Contents --------------------------------------------------------------------------------------------------------- 2
1. Absolute Maximum Ratings----------------------------------------------------------------------------- 3
2. Recommended Operating Range ----------------------------------------------------------------------- 3
3. Electrical Characteristics -------------------------------------------------------------------------------- 4
4. Thermal Resistance Characteristics ------------------------------------------------------------------- 4
5. Performance Curves -------------------------------------------------------------------------------------- 5
6. Derating Curve -------------------------------------------------------------------------------------------- 6
7. Block Diagram --------------------------------------------------------------------------------------------- 7
8. Pin Configuration Definitions--------------------------------------------------------------------------- 7
9. Typical Application --------------------------------------------------------------------------------------- 8
10. Physical Dimensions -------------------------------------------------------------------------------------- 9
10.1. Land Pattern Example --------------------------------------------------------------------------- 10
11. Marking Diagram --------------------------------------------------------------------------------------- 10
12. Operational Description -------------------------------------------------------------------------------
12.1. Constant Voltage Control------------------------------------------------------------------------
12.2. Output Voltage Setting ---------------------------------------------------------------------------
12.3. Overcurrent Protection (OCP) -----------------------------------------------------------------
12.4. TSD (Thermal Shutdown Protection) ---------------------------------------------------------
12.5. Output On/Off Function -------------------------------------------------------------------------
13. Design Notes ----------------------------------------------------------------------------------------------
13.1. Input and Output Capacitor --------------------------------------------------------------------
13.2. Protection Diode for Reverse Biasing ---------------------------------------------------------
13.3. Considerations in Circuit Configuration -----------------------------------------------------
11
11
11
11
11
12
12
12
12
13
14. Pattern Layout Example ------------------------------------------------------------------------------- 13
Important Notes ---------------------------------------------------------------------------------------------- 14
NR301E, NR302A-DSE Rev.2.0
SANKEN ELECTRIC CO., LTD
Apr. 03, 2017
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2015
2
NR301E, NR302A
1.
Absolute Maximum Ratings
Unless otherwise specified, T
A
= 25 °C.
Parameter
VIN Pin Voltage
VC Pin Voltage
ADJ Pin Voltage
Power Dissipation
Junction Temperature
Storage Temperature
Symbol
V
IN
V
C
V
ADJ
P
D
T
J
T
stg
The IC is mounted on the
glass-epoxy board.
See
Figure 14-1
.
Conditions
V
C
≤
V
IN
Rating
−0.3 to 30
−0.3 to 30
−0.3 to 5.0
2.27
−40 to 125
−40 to 125
Unit
V
V
V
W
°C
°C
2.
Recommended Operating Range
Parameter
Symbol
V
IN
I
OUT
V
OUT
T
OP(A)
Min.
3.0
0
1.1
−30
Max.
27
1.0
16
85
Unit
V
A
V
°C
VIN Pin Voltage*
Output Current*
Output Voltage*
Operating Ambient Temperature
Operating Junction Temperature
T
OP(J)
−30
100
°C
*Following equation shows the relationship between V
IN
, V
OUT
, and I
OUT
. Thus, Dropout Voltage (V
IN
− V
OUT
) or I
OUT
may be limited in some conditions.
P
D
= (V
IN
− V
OUT
) × I
OUT
NR301E, NR302A-DSE Rev.2.0
SANKEN ELECTRIC CO., LTD
Apr. 03, 2017
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2015
3
NR301E, NR302A
3.
Electrical Characteristics
Current polarities are defined as follows: current going into the IC (sinking) is positive current (+); current coming
out of the IC (sourcing) is negative current (−).
Unless otherwise specified, T
A
= 25 °C, V
IN
= 6 V and V
OUT
= 5 V (R1 = 10 kΩ and R2 = 40 kΩ).
Parameter
Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Circuit Current during Regulator
Output Off
Output Voltage Temperature
Coefficient
Ripple Rejection Ratio
VC Pin Voltage (Output On)
VC Pin Voltage (Output Off)
VC Pin Current (Output On)
VC Pin Current (Output Off)
Overcurrent Protection Operating
Current
Thermal Shutdown Operating
Temperature
Thermal Shutdown Temperature
Hysteresis
Symbol
V
ADJ
ΔV
LINE
ΔV
LOAD
ΔV
DIF
I
Q
I
Q(OFF)
ΔV
OUT
/ΔT
A
R.REJ
V
C(H)
V
C(L)
I
C(H)
I
C(L)
I
S1
T
SD
T
SD(HYS)
Conditions
I
OUT
= 10 mA
V
IN
= 6 V to 15 V,
I
OUT
= 10 mA
I
OUT
= 0 A to 1 A
I
OUT
= 0.5 A
I
OUT
= 1 A
I
OUT
= 0 mA,
V
C
= 2 V
V
C
= 0 V
T
J
= 0 °C to 100 °C
V
OUT
= 5 V,
I
OUT
= 0.1 A,
f = 100 Hz to 120 Hz
I
OUT
= 10 mA
I
OUT
= 10 mA
V
C
= 2.0 V
V
C
= 0 V
*
Min.
0.985
―
―
―
―
0.5
―
―
―
2.0
―
―
−2
1.1
135
―
Typ.
1.00
25
30
0.3
0.6
0.9
0
±0.5
55
―
―
4
0
―
155
50
Max.
1.015
50
60
0.4
0.8
1.6
1
―
―
―
0.6
40
0.1
―
―
―
Unit
V
mV
mV
V
V
mA
μA
mV/°C
dB
V
V
μA
μA
A
°C
°C
* After the Overcurrent Protection is activated, I
S1
is measured when the output voltage decreases by 5% from the
reference output voltage (I
OUT
= 10 mA).
4.
Thermal Resistance Characteristics
Parameter
Symbol
θ
J-A
θ
J-L
Conditions
The IC is mounted on the
glass-epoxy board.
See
Figure 14-1
.
Min.
—
—
Typ.
—
20
Max.
44
—
Unit
°C/W
°C/W
Thermal Resistance between Junction
and Ambient
Thermal Resistance between Junction
and Lead*
* The lead temperature is measured at 3 pin (GND).
NR301E, NR302A-DSE Rev.2.0
SANKEN ELECTRIC CO., LTD
Apr. 03, 2017
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2015
4
NR301E, NR302A
5.
Performance Curves
1.8
1.6
1.4
1.2
I
OUT
= 0 A
I
OUT
= 0.5 A
I
Q
(mA)
V
OUT
(V)
1
0.8
0.6
0.4
0.2
0
0
5
10
15
20
25
30
I
OUT
= 1 A
V
IN
(V)
Figure 5-1.
0.9
0.8
0.7
0.6
V
IN
(V)
Figure 5-2.
5.1
5.08
Quiescent Current, I
Q
vs. Input Voltage, V
IN
Output Voltage, V
OUT
vs. Input Voltage, V
IN
V
IN
Iout=0A
I
OUT
= 0 A
V
OUT
= 2.5 V
V
OUT
= 3.3 V
V
OUT
= 5 V
V
OUT
= 9 V
5.06
5.04
5.02
5
4.98
4.96
4.94
4.92
1
V
DIF
(V)
0.5
0.4
0.3
0.2
0.1
0
0
0.2
V
OUT
= 15 V
0.4
0.6
0.8
V
OUT
(V)
4.9
0
5
10
15
20
I
OUT
(A)
Figure 5-3.
5.04
5.03
5.02
5.01
V
IN
(V)
Figure 5-4.
Line Regulation
Dropout Voltage, V
DIF
vs. Output Current, I
OUT
V
OA
6
Vin=10v
V
IN
=
6v
V
10
5
4
V
OUT
(V)
V
OUT
(V)
5
4.99
4.98
4.97
4.96
4.95
4.94
0
0.2
0.4
0.6
0.8
1
3
2
1
0
0
0.5
Vin=6v
V
IN
= 10 V
10v
V
IN
= 6 V
V
IN
= 6 V
1
1.5
2
I
O
(A)
Figure 5-5.
Load Regulation
Figure 5-6.
I
O
(A)
Overcurrent Protection Characteristics
NR301E, NR302A-DSE Rev.2.0
SANKEN ELECTRIC CO., LTD
Apr. 03, 2017
http://www.sanken-ele.co.jp/en
© SANKEN ELECTRIC CO., LTD. 2015
5
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