NR885E Datasheet PDF - SANKEN
| Part Number | NR885E | |
| Description | 3A 18V 350kHz Synchronous Buck Regulator | |
| Manufacturers | SANKEN | |
| Logo |  |
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3A, 18V, 350kHz , Synchronous Buck Regulator
NR885E
Oct./30/2013
General Descriptions
The NR885E is synchronous buck regulator ICs
integrates High-side and Low-side power MOSFETs.
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 regulator. 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 NR885E is available in an 8-pin SOIC package with
an exposed thermal pad on the back side.
Package
Exposed SOIC 8
Thermally enhanced 8-Pin package
Features & Benefits
Current mode PWM control
Up to 95% efficiency
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/OFF the regulator function
Electrical Characteristics
3A output current
Operating input range VIN = 4.5V～18V
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
VIN
R3
VIN_s
C1
C2
GND
2
R1 IN
7
EN
C10
1
BS 3
SW
L1
NR885E
8
SS
5
FB
GND
NC
46
C9
R5
R4
R6
D1
Vo
Vo_s
C4 C5
GND
SW
C1, C2: 10μF / 25V
C4, C5: 22μF / 16V
C9: 0.1μF
C10: 0.1μF
R1: 100kΩ
L1: 10μH
R3: 22Ω
R4: 8.2 kΩ, R5: 4.3kΩ (Vo=3.3V)
R6: 3.9kΩ
Rev.1.1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
1
http://www.Datasheet4U.com
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3A, 18V, 350kHz , Synchronous Buck Regulator
NR885E
Oct./30/2013
NR885E Typical Performance Characteristics
Output startup
VO=3.3V, Load = Constant Resistance
Io = 0A
0.5A
1A
2A
3A
Input Voltage VIN [V]
Over Current Protection
VVoO==3.33V.3V
3.50
3.00
2.50
2.00 VIN = 8V
10V
1.50 12V
1.00
15V
18V
0.50
0.00
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
Output Current IO [A] 出力電流Io [A]
Load Regulation: VLoad
NR880K ES1 VHSOO=P38 .S31VRT(Vo=3.3V)
3.35 VIN = 6V
8V
3.33 10V
12V
3.31 15V
18V
3.29
3.27
3.25
0
0.5 1 1.5 2 2.5 3 3.5
Output Current IO [A]
Io(A)
Shutdown Supply Current : IIN(off)
NR880K ES1 DIPV28ESN1=Iq0ofVf vs VIN at RT
EN:Open
10
9
8
7
6
5
4
3
2
1
0
0 2 4 6 8 10 12 14 16 18 20
Input Voltage VIN [V]
VIN(V)
Switching Frequency: fSW
400
390
380
370
360
350
340
330
320
310
300
0
NR880K ES1 HVSOOP=83S.13RVT(Vo=3.3V)
VIN = 6V
8V
10V
12V
15V
18V
0.5 1 1.5 2 2.5 3 3.5
Output Current IO [A]
Io(A)
Supply Current : IIN
VO=Io3=0.A3V
7
6
5
4
3
2
1
0
0 2 4 6 8 10 12 14 16 18
Input Voltage VIN [V入]力電圧Vin [V]
Rev.1.1
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NR885E electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NR885E.PDF Datasheet ] | |
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