Sanken NR131D Ultra light load high efficiency Datasheet

Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
General Descriptions
Package
The NR130D series is buck regulator ICs integrates
High-side power MOSFETs. With the current mode
control, ultra low ESR capacitors such as ceramic
capacitors can be used. The ICs can realize super-high
efficiency by performing pulse skip operation at light
load condition. The ICs have protection functions such as
Over-Current Protection (OCP), Under-Voltage Lockout
(UVLO) and Thermal Shutdown (TSD). Soft starting
time can be set up by selecting an external capacitor
value. The ON/OFF pin (EN Pin) turns the regulator on
or off and helps to achieve low power consumption
requirements. The NR130D series is available in an 8-pin
DIP package.
 DIP8
Features & Benefits





Current mode PWM control
Up to 94% efficiency at normal load condition
Up to 85% efficiency at light load condition
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
Programable Pulse-Skip operation
Electrical Characteristics




3A Continuous output current
Operating input range VIN = 4.5V~17V
Output adjustable VO = 0.8V~14V
Fixed 350kHz frequency
Applications
 LCD TV / Blu-Ray / Set top box
 Green Electronic products
 Other power supply
Typical Application Circuit
For NR131D
NR131D
C1, C2: 10μF / 25V, C4, C5: 22μF / 16V, C7: 0.1μF, C9:1800pF, C11: 220pF(Option), R1: 510kΩ , R3: 10Ω, R4: 36 kΩ, R5: 27kΩ
(VO=5.0V), R6: 12kΩ, R7:510kΩ(Option), D1: SJPJ-L4, L1: 10μH
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
For NR132D
NR132D
C1, C2: 10μF / 25V, C4, C5: 22μF / 16V, C7: 0.1μF, C9:1800pF, C11: 220pF(Option), R1: 510kΩ , R3: 10Ω, R4: 36 kΩ, R5: 27kΩ
(VO=5.0V), R6: 12kΩ, R7:510kΩ(Option), D1: SJPJ-L4, L1: 10μH
Series Lineup
Product
Name
fSW
VIN
350kHz
4.5V to
17V
NR131D
NR132D
(1)
(2)
VO
0.8V to
14V
(1)
IO
Pin No.1
Function
Package
NC
(2)
3A
DIP8
COMP
The minimum input voltage shall be either of 4.5V or VO+3V, whichever is higher.
The I/O condition limited by the Minimum on-time (TON(MIN)).
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Units
DC input voltage
VIN
19
V
BS terminal voltage
VBS
24.5
V
SW terminal voltage
VSW
19
V
FB terminal voltage
VFB
5.5
V
EN terminal voltage
VEN
19
V
SS terminal voltage
VSS
7.4
V
SS terminal allowable input current
Issb
5
mA
Power dissipation
(3)
PD1
TBD
W
Junction temperature
(4)
TJ
40 ~ 150
°C
Storage temperature
TS
40 ~ 150
Thermal resistance
θJP
TBD
(junction- Pin No. 4)
Thermal resistance
θJA
TBD
(junction-ambient air)
(3)
Limited by thermal shutdown.
(4)
The temperature detection of thermal shutdown is about 165°C
°C
Rev.1.1
Glass-epoxy board mounting
in a 30×30mm.
(copper area in a 25×25mm)
Max TJ =150°C
°C /W
°C /W
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Conditions
Glass-epoxy board mounting
in a 30×30mm.
(copper area in a 25×25mm)
2
Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Recommended Operating Conditions
Parameter
DC input voltage
Symbol
(5)
Ratings
Units
MIN
MAX
VIN
Vo+3
17
V
IO
0
3.0
A
VO
0.8
14
V
Conditions
(6)
DC output current
Output voltage
(7)
(7)
Ambient operating temperature
TOP
85
°C
40
The minimum value of input voltage is taken as the larger one of either 4.5V or VO +3V.
In the case of VIN=VO +1~VO +3V , it is set to IO = Max. 2A
(6)
Recommended circuit refers to Typical Application Circuit.
(7)
To be used within the allowable package power dissipation characteristics.
(5)
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
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NR130D series
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Electrical Characteristics
Ta = 25°C
Parameter
Symbol
Reference voltage
Output voltage temperature
coefficient
VREF
Ratings
MIN
TYP
MAX
0.780
0.800
0.820
⊿VREF/⊿T
Switching frequency
fSW
±0.05
245
350
Line regulation
(8)
VLine
50
Load regulation
(8)
VLoad
50
Over current protection
threshold
Supply Current(Non-switching)
IS
Shutdown Supply Current
Input Under Voltage Lockout
threshold
Charging current
SS Pin
SS start voltage
SS finish voltage
Sink current
EN Pin
Threshold voltage
Max on-duty
(8)
3.1
455
Test conditions
V
VIN = 12V,Io = 1.0A
V = 12V, Io = 1.0A
mV/°C IN
40°C to +85°C
VIN=12V, Vo=5.0V,
kHz
Io=1A
VIN = 8V~17V,
mV
Vo = 5.0V, Io = 1A
VIN = 12V, Vo = 5.0V,
mV
Io = 0.1A~2.0A
4.5
A
VIN = 12V, Vo = 5.0V
IIN
100
μA
VIN= 12V, VEN=12V
IIN(off)
1
μA
VIN=12V, VEN=0V
Vuvlo
3.9
4.4
V
VIN Rising
22
0.5
1.4
5
31
μA
10
μA
VSS=0V, VIN=12V
VIN=12V
VIN=12V
VEN= 12V
1.3
2.1
V
VIN=12V
%
VIN=12V
nsec
VIN=12V
°C
VIN=12V
°C
VIN=12V
μA/V
V/V
A/V
μA
μA
VIN=12V
VIN=12V
VIN=12V
VIN=12V
VIN=12V
ISS
Vss1
Vss2
IEN
13
VEN
0.7
DMAX
90
(8)
Minimum on-time
TON(MIN)
170
Thermal shutdown threshold
(8)
TSD
151
165
temperature
Thermal shutdown restart
(8)
TSD_hys
15
hysteresis of temperature
(9)
Transconductance
Gm
750
(9)
Voltage gain
Av
900
COMP
(9)
Conversion factor
Gcs
5.7
Pin
(9)
Max. sink current
Isink
50
Max. source current (9)
Isource
50
(8)
Guaranteed by design,not tested.
(9)
This is applicable to only NR132D that 8 pin is a COMP terminal.
Rev.1.1
Units
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Typical Performance Characteristics
NR131D typical Performance Characteristics
(1)Efficiency
Condition: VO=3.3V
100
90
Ffficiency
η [%]
80
70
60
50
0.001
0.01
Vin=6V
Vin=8V
Vin=10V
Vin=12V
Vin=14V
Vin=16V
0.1
Output Current
1
10
IO [A]
Condition:VO=5.0V
100
Efficiency η [%]
90
80
70
60
50
0.001
0.01
Vin=6V
Vin=8V
Vin=10V
Vin=12V
Vin=14V
Vin=16V
0.1
1
10
Output Current IO [A]
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
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NR130D series
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(5)Over Current Protection
Output Voltage
VO [V]
(2) Output startup Io=1A
6
6
5
5
4
4
3
3
2
2
1
1
0
Vin=8[V]
Vin=12[V]
Vin=16[V]
0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
1
2
3
(3) Load Regulation : VLoad
8
6
7
6
Input Current
Iin [mA]
Output Voltage
[V]
VVo
O [V]
5.300
5.250
5.200
5.150
5.100
5.050
5.000
4.950
4.900
4.850
4.800
4.750
4.700
5
4
3
2
1
0.0
0.5
1.0
1.5
2.0
2.5
0
3.0
0
3
6
9
12
15
Input Voltage VIN [V]
Io [A] IO [A]
Output Current
(4) Shutdown Supply Current : IIN(off)
NR110K focs
Vo=3.3V L=10uH
0.35
fOSC [kHz]
0.30
frequency
fosc [kHz]
0.25
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
0.0
5.0
10.0
15.0
20.0
25.0
18
(7) Switching Frequency: fSW
NR110K,111K,114K,115K,116K,117K
VENIQ_off
=0V
0.40
Input Current
Iin [mA]
Iin [mA]
5
(6) Supply Current : IIN
VO=5.0V
Supply Current : IIN
NR116KLoadReg.
Vo=3.3V L=10uH Ta=25℃
30.0
500
480
460
440
420
400
380
360
340
320
300
280
260
240
220
200
0.0
1.0
2.0
3.0
4.0
5.0
Io [A] Current
Output
IO [A]
Input
Voltage
VIN[V]
VIN [V]
Rev.1.1
4
Output Current IO [A]
Input Voltage VIN [V]
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Functional Block Diagram
NR131D
NR132D
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Pin Asignments & Functions
Pin Assignments
Pin assignments & functions of NR130D series
Pin No.
Symbol
Description
1
NC or
NR131D: No Connection.(NC)
COMP
NR132D: External phase compensation terminal(COMP)
2
IN
Power input. VIN supplies the power to the IC.as well as the regulator switches
Rev.1.1
3
SW
4
GND
5
FB
6
EN
7
SS
8
BS
Power switching output.
SW supplies power to the output.
Connect the LC filter from SW to the output.
Connect a Schottky Barrier Diode between SW and GND.
Note that a capacitor is required from SW to BS to supply the power the High-side
switch
Ground
Connect the exposed pad to Pin No.4
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.
Enable input.
Drive EN Pin high to turn on the regulator, low to turn it off.
Soft-Start and SKIP operation control input.
To set the soft-start period, connect to a capacitor between GND.
To set the Low Ripple SKIP operation, add the resister 510k ohm between SS terminal
and IN terminal.
High-side Boost input.
BS supplies the drive for High-side Nch-MOSFET switch.
Connect a capacitor and a resistor between SW to BS.
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Example Application Circuit
For NR131D
NR131D
C1, C2: 10μF / 25V, C4, C5: 22μF / 16V, C7: 0.1μF, C9:1800pF, C11: 220pF(Option), R1: 510kΩ , R3: 10Ω, R4: 36 kΩ, R5: 27kΩ
(VO=5.0V), R6: 12kΩ, R7:510kΩ(Option), D1: SJPJ-L4, L1: 10μH
For NR132D
NR132D
C1, C2: 10μF / 25V, C4, C5: 22μF / 16V, C7: 0.1μF, C9:1800pF, C11: 220pF(Option), R1: 510kΩ , R3: 10Ω, R4: 36 kΩ, R5: 27kΩ
(VO=5.0V), R6: 12kΩ, R7:510kΩ(Option), D1: SJPJ-L4, L1: 10μH
A design guide for add-on parts around of the NR130D series.
(1)Diode D1
・The schottky-barrier diode must be used for D1. If other diodes like fast recovery diodes are used, IC may be
damaged because of the reverse voltage applied by the recovery voltage or ON voltage.
(2)Choke coil L1
・If the winding resistance of the choke coil is too high, the efficiency may go down to the extent that it is out of the rating.
・As the start current of the over current protection is approximately 4A, attention must be paid to the heating of the choke
coil by the magnetic saturation due to overload or short-circulated load.
(3)Capacitor C1( C2), C4(C5), C9
・As large ripple current across C1 (C2) and C4 (C5), capacitors with high frequency and low impedance for SMPS must be
used. Especially when the impedance of C4 (C5) is high, the switching waveform may not be normal at low temperature.
・C9 is a capacitor for soft start. In case soft start function is not used, please keep Pin No.2 open.
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
(4)Resistor R1, R2
・R4, R5, R6 are resistor to the Output Voltage. In case of the I(ADJ) = 66μA, R4, R5, R6 are calculated by the next
equation .
μ
Ω
Ω
Ω
*63kΩ= 27kΩ+36kΩ
In order to have optimum operating condition, each component must be connected with the minimum distance.
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Allowable package power dissipation
TBD
Allowable package powe disspation of NR130A series
NOTES:
1) Glass-epoxy board mounting in a 30×30mm
2) copper area : 25×25mm
3) The power dissipation is calculated at the junction temperature 125 °C
4) Losses can be calculated by the following equation.
As the efficiency is subject to the input voltage and output current, it shall be obtained from the efficiency curve and
substituted in percent
5) Thermal design for D1 shall be made separately.
 100

PD  VO  I O 
 1 ・・・(1)
 x

VO: Output voltage
VIN : Input voltage
IO : Output current
ηx : Efficiency (%)
Vf: SJPB-L4 Io=3A/Vf=0.55V
Diode forward voltage (A to K)
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
PCB layout recommendation
*The demonstration Printed circuit board. It can mount a part for the experiment ,except for the Example Application Circuit.
Front Side: Component Side (double sided board)
Back Side: GND Side (double sided board)
Note
1) Size of the PCB is about 40mm × 40mm
2)Dimension is in millimeters, dimension in bracket is in inches.
3) Drawing is not to scale.
8×φ0.8
(Reference)
DIP8 package
About the position of the lead-insertion hole
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
Package outline, dimensions
DIP8 package (Units:mm)
7.938±0.3175
6.35±0.127
(1.524)
(1.524)
0.2032~0.3810
3.302±0.127
0.381min
3.302±0.254
8.636±0.762
0.356~0.559
(1.524)
*1.Part number
9.4±0.127
8
7
6
5
1st letter
NR131D
SK
*1
nd
6.35±0.127
*2
*3
1
2
3
Unit : mm
*2. Lot number (three digit)
The last digit of year
2 letter
Month (1 to 9 for Jan. to Sept.,
O for Oct. N for Nov. D for Dec.)
3rd & 4th letter
Week code (01~03)
*3.Control number (four digit)
4
External terminal processing:Sn plating(Sn100)
PIN Assignment
1.NC or COMP
2.IN
3.SW
4.GND
5.FB
6.EN
7.SS
8.BS
Package outline and Marking of NR130D series
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
Tentative
NR130D series
Sep/10/2013
OPERATING PRECAUTIONS
Reliability can be affected adversely by improper storage environments and handling methods. Please observe the
following cautions.
Heat dissipation and reliability
Thermal performance of the surface mount package IC depends on the material and area size of PCB and its copper
plane. Design thermal condition with sufficient margin
Parallel operation
The parallel operation to increase the current is not available.
Thermal shut down
The NR130Aseries has a thermal protection circuit.
This circuit protects the IC from the heat generation by the over load.
This circuit cannot guarantee the long-term reliability against the continuously over load status.
Cautions for Storage
 Ensure that storage conditions comply with the standard temperature (5 to 35°C) and the standard relative humidity
(around 40 to 75%); avoid storage locations that experience extreme changes in temperature or humidity.
 Avoid locations where dust or harmful gases are present and avoid direct sunlight.
 Reinspect for rust on leads and solderability of products that have been stored for a long time.
Cautions for Testing and Handling
 When tests are carried out during inspection testing and other standard test periods, protect the products from power
surges from the testing products, shorts between the product pins, and wrong connections. In addition, avoid tests
exceeded ratings
Soldering
When soldering the products, please be sure to minimize the working time, within the following limits.
・Reflow Preheat ; 180°C / 90±30s
Heat ; 250°C / 10±1s (260°C peak ,2times)
・Soldering iron ; 380±10°C / 3.5±0.5s (1time)
Electrostatic Discharge
 When handling the products, the operator must be grounded. Grounded wrist straps worn should have at least 1MΩ of
resistance from the operator to ground to prevent shock hazard, and it should be placed near the operator.
 Workbenches where the products are handled should be grounded and be provided with conductive table and floor mats.
 When using measuring equipment such as a curve tracer, the equipment should be grounded.
 When soldering the products, the head of a soldering irons or the solder bath must be grounded in order to prevent leak
voltages generated by them from being applied to the products.
 The products should always be stored and transported in Sanken shipping containers or conductive containers, or be
wrapped in aluminum foil.
Rev.1.1
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Ultra light load high efficiency,VIN=17V,Current mode Step-down Io=3A Buck Regulator IC
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NR130D series
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IMPORTANTS NOTES
 The contents in this document are subject to changes, for improvement and other purposes, without notice.
Make sure that this is the latest revision of the document before use.
 Application and operation examples described in this document are quoted for the sole purpose of reference for
the use of the products herein and Sanken can assume no responsibility for any infringement of industrial
property rights, intellectual property rights or any other rights of Sanken or any third party which may result
from its use.
 Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and
defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take,
at their own risk, preventative measures including safety design of the equipment or systems against any
possible injury, death, fires or damages to the society due to device failure or malfunction.
 Sanken products listed in this document are designed and intended for the use as components in general purpose
electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment,
measuring equipment, etc.).
When considering the use of Sanken products in the applications where higher reliability is required
(transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm
systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss, prior to
the use of the products herein.
The use of Sanken products without the written consent of Sanken in the applications where extremely high
reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly
prohibited.
 In the case that you use Sanken semiconductor products or design your products by using Sanken
semiconductor products, the reliability largely depends on the degree of derating to be made to the rated values.
Derating may be interpreted as a case that an operation range is set by derating the load from each rated value or
surge voltage or noise is considered for derating in order to assure or improve the reliability. In general, derating
factors include electric stresses such as electric voltage, electric current, electric power etc., environmental
stresses such as ambient temperature, humidity etc. and thermal stress caused due to self-heating of
semiconductor products. For these stresses, instantaneous values, maximum values and minimum values must
be taken into consideration.
In addition, it should be noted that since power devices or IC’s including power devices have large self-heating
value, the degree of derating of junction temperature affects the reliability significantly.
 When using the products specified herein by either (i) combining other products or materials therewith or (ii)
physically, chemically or otherwise processing or treating the products, please duly consider all possible risks
that may result from all such uses in advance and proceed therewith at your own responsibility.
 Anti radioactive ray design is not considered for the products listed herein.
 Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out
of Sanken’s distribution network.
 The contents in this document must not be transcribed or copied without Sanken’s written consent.
Rev.1.1
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