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NB650H 데이터시트 PDF




MPS에서 제조한 전자 부품 NB650H은 전자 산업 및 응용 분야에서
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부품번호 NB650H 기능
기능 High Efficiency Fast-Transient 6A 28V Synchronous Step-down Converters
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NB650H 데이터시트, 핀배열, 회로
NB650/NB650H
High-Effeciency, Fast-Transient, 6A, 28V
Synchronous Step-Down Converters with 2-Bit VID
The Future of Analog IC Technology
DESCRIPTION
The NB650/NB650H is fully-integr ated, high-
frequency, synchronous, rectified, step-down,
switch-mode converters with dyn amic-output–
voltage control. It offers a very compact solution
to achieve 6A of continuous output current over
a wide inpu t supply ra nge, and h as excellent
load and line regulatio n. The NB6 50/NB650H
operates at high efficien cy over a wide output-
current–load range.
Constant-On-Time control mode provides fast
transient response and eases loop stabilization.
2-bit VID in puts suppor t changing the output
voltage on-the-fly.
Full protect ion features include short-circuit
protection, over-current protection, o ver-voltage
protection, under-voltage prot ection, an d
thermal shut down.
The NB650/NB650H requires a minimal number
of readily-available standard extern
al
components, and is available in a space-saving
3mm×4mm QFN17 package.
FEATURES
Wide 4.5V-to-28V Operating Input Range
6A Output Current
Internal 50mHigh-Side, 18mLow-Side
Power MOSFETs
Proprietary Switching Loss Reduction
Technique
1% Reference Voltage
Programmable Soft-Start Time
2-bit VID Input
Soft Shutdown
Frequency Programmable from 150kHz to
1MHz
SCP, OCP, OVP, UVP, and Thermal
Shutdown
Optional OCP Protection: Latch-Off Mode
(NB650) and Hiccup Mode (NB650H)
Output Adjustable from 0.6V to 13V
Available in QFN17 (3mm×4mm) Package
APPLICATIONS
Notebook Systems and I/O Power
Networking Systems
Digital Set Top Boxes
Flat-Panel Televisions and Monitors
Distributed Power Systems
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit M PS website u nder Q uality Assurance. “MPS” and “ The
Future of An alog IC Technology” a re Re gistered T rademarks of Mo nolithic
Power Systems, Inc.
TYPICAL APPLICATION FOR NOTEBOOK
VIN
C1
ON/OFF
R6
C5
ON/OFF
11
IN
R7
17 FREQ
5 EN
8 VCC
R5
4 PG
6
VID1
3
BST
1,2
SW
NB650
NB650H
FB 13
RFB2 14
RFB1 15
C3 L1
R4 C4
R2C R2B
ON/OFF
7
VID2
SS 16
PGND
9,10
GND
12
C6
R1
R2A
VOUT
C2
NB650/NB650H Rev. 1.12
www.MonolithicPower.com
10/11/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
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NB650H pdf, 반도체, 판매, 대치품
NB650/NB650H – 6A, 28V, FAST-TRANSIENT, SYNCHRONOUS STEP-DOWN CONVERTERS
PIN FUNCTIONS
QFN17
Pin #
1,2
3 BST
Name
SW
4 PG
5
EN
6,7 VID1
VID2
8 VCC
9,10 GND
11 IN
12
13 FB
AGND
14,15
RFB2
RFB1
16 SS
17 FREQ
Description
Switch Output. Connect using wide PCB traces.
Bootstrap. Requires a ca pacitor between SW and BST to form a floating supply across
the high-side switch driver.
Power Good. Output is an open drain and is high if t he output voltage ex ceeds 90% of
the nominal voltage. There is a delay from FB90%×Vref to PG goes high.
EN=1 to enable. For automatic start-up, connect to VIN with a 100kresistor.
VID inputs. Control signals for the output-voltage scaling. Acts as the control signals for
the internal VID switches. Usually uses an external resistor in parallel with the low-side
FB resistor. Changing the VID ON/OFF state changes the FB divider scaling and result
in different output voltages.
Internal LDO output. The power supply of the internal control circuits. Decouple with 1μF
capacitor.
System Ground. The reference ground of the regulated output voltage. Layo ut requires
extra care.
Supply Voltage. Ope rates from a 4.5V -to-28V input rail. Re quires C1 to de couple the
input rail. Connect using wide PCB traces.
Analog Ground.
Feedback. Connect to the tap of an external resistor divider from the output to GND to
set the output voltage.
Drain of the internal VID switch es. Typically uses an external resistor in parallel with the
low-side FB resi stor along with the inte rnal VID switch to ch ange the O N/OFF state of
the VID swit ching to cha nge the FB divider scali ng and re sult in different output
voltages.
Soft-Start. Conne ct an ex ternal capa citor to pro gram the soft-st art time for the switch -
mode regulator.
Frequency Set during CCM. The input voltage and the frequency-set resistor between
the IN and FREQ pin determines the ON period. For best results, use an ON period
longer than 200ns. Decouple with a 1nF capacitor.
NB650/NB650H Rev. 1.12
www.MonolithicPower.com
10/11/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
4

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NB650H 전자부품, 판매, 대치품
NB650/NB650H – 6A, 28V, FAST-TRANSIENT, SYNCHRONOUS STEP-DOWN CONVERTERS
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=12V, VOUT =1.05V, L=1µH, TA=+25°C, unless otherwise noted.
Start-Up Through EN
IOUT = 0A
Start-Up Through EN
IOUT = 6A
Shutdown Through EN
IOUT = 0A
VOUT
500mV/div.
VEN
5V/div.
VSW
10V/div.
IL
2A/div.
VOUT
500mV/div.
VEN
5V/div.
VSW
10V/div.
IL
10A/div.
VOUT
500mV/div.
VEN
5V/div.
VSW
10V/div.
IL
2A/div.
Shutdown Through EN
IOUT = 6A
Short Circuit Protection
NB650, Latch-Off Version
OCP Protection
NB650, Latch-Off Version
VOUT
500mV/div.
VEN
5V/div.
VSW
10V/div.
IL
10A/div.
VOUT
500mV/div.
VSW
10V/div.
IL
5A/div.
VOUT
500mVV/dSiWv.
10V/div.
IL
5A/div.
VOUT(AC)
50mV/div.
VSW
10V/div.
IL
5A/div.
VID On-the-fly
IOUT = 0.3A
FVID1 = 1kHz, FVID2 = 0.5kHz,
VOUT = 1.05V/1.1V/1.15V/1.2V
VID On-the-fly
IOUT = 6A
FVID1 = 1kHz, FVID2 = 0.5kHz,
VOUT = 1.05V/1.1V/1.15V/1.2V
VID1
5V/div.
VID2
5V/div.
VOUT(AC)
100mV/div.
VID1
5V/div.
VID2
5V/div.
VOUT(AC)
100mV/div.
NB650/NB650H Rev. 1.12
www.MonolithicPower.com
10/11/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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관련 데이터시트

부품번호상세설명 및 기능제조사
NB650

High Efficiency Fast-Transient 6A 28V Synchronous Step-down Converters

MPS
MPS
NB650H

High Efficiency Fast-Transient 6A 28V Synchronous Step-down Converters

MPS
MPS

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