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부품번호 | NCP1411 기능 |
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기능 | Sync-Rect PFM Step-Up DC-DC Converter | ||
제조업체 | ON | ||
로고 | |||
전체 14 페이지수
NCP1411
Sync−Rect PFM Step−Up
DC−DC Converter with
Low−Battery Detector and
Ring−Killer
NCP1411 is a monolithic micropower high frequency Boost
(step−up) voltage switching converter IC specially designed for
battery operated hand−held electronic products up to 250 mA loading.
It integrates Synchronous Rectifier for improving efficiency as well as
eliminating the external Schottky Diode. High switching frequency
(up to 600 kHz) allows low profile inductor and output capacitor being
used. Low−Battery Detector, Logic−Controlled Shutdown and
Cycle−by−Cycle Current Limit provide value−added features for
various battery−operated applications. The innovative Ring−Killer
circuitry guarantees quiet operation in discontinuous conduction
mode. With all these functions ON, the device quiescent supply
current is only 9.0 mA typical. This device is available in the space
saving compact Micro8t package.
Features
• Pb−Free Package is Available
• High Efficiency, up to 92%
• Very Low Device Quiescent Supply Current of 9.0 mA Typical
• Built−in Synchronous Rectifier (P−FET) Eliminates One External
Schottky Diode
• High Switching Frequency (up to 600 kHz) Allows use of Small Size
Inductor
• High Accuracy Reference Output, 1.19 V $ 0.6% @ 25°C, can
supply more than 2.5 mA when VOUT ≥ 3.3 V
• Ring−Killer for Quiet Operation in Discontinuous Conduction Mode
• 1.0 V Startup at No Load Guaranteed
• Output Voltage from 1.5 V to 5.5 V Adjustable
• Output Current up to 250 mA @ VIN = 2.5 V, VOUT = 3.3 V
• Logic−Controlled Shutdown
• Open Drain Low−Battery Detector Output
• 1.0 A Cycle by Cycle Current Limit
• Low Profile and Minimum External Parts
• Compact Micro8 Package
Typical Applications
• Personal Digital Assistant (PDA)
• Handheld Digital Audio Product
• Camcorder and Digital Still Camera
• Handheld Instrument
• Conversion from One or Two NiMH or NiCd, or One Li−ion Cell
to 3.3 V/5.0 V
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MARKING
DIAGRAM
8
1
Micro8
DM SUFFIX
CASE 846A
A2
AYW
A2 = Device Marking
A = Assembly Location
Y = Year
W = Work Week
PIN CONNECTIONS
FB 1
LBI/EN 2
LBO 3
REF 4
8 OUT
7 LX
6 GND
5 BAT
(Top View)
ORDERING INFORMATION
Device
Package
Shipping†
NCP1411DMR2
Micro8 4000 Tape & Reel
NCP1411DMR2G Micro8 4000 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 4
1
Publication Order Number:
NCP1411/D
FB
1
REF
4
LBI/EN
2
NCP1411
VBAT
BAT
M3 5
Chip
Enable
+
−
PFM
ZLC +
−+
20 mV
CONTROL LOGIC
_ZCUR
_MSON
_MAINSW2ON
_PWQONCE
_CEN
_PFM
_MAINSWOFD
_SYNSW2ON
VDD
GND
LX
VDD 7
VOUT
M2 OUT
8
SENSE-
FET
M1
6
VDD GND
Voltage
Reference
+
−
_SYNSWOFD
_VREFOK
_ILIM
ILIM
+
−
+
GND
RSENSE
GND
GND
LBO
3
Figure 2. Simplified Functional Diagram
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4
4페이지 NCP1411
3.0
2.0
1.0
3V
0
−1.0
−2.0
−3.0
1
2.2 V
L = 22 mH
VOUT = 3.3 V
CIN = 10 mF
COUT = 33 mF
VIN = 1.8 V
10 100
ILOAD, OUTPUT LOADING CURRENT (mA)
1000
Figure 15. Output Voltage Change versus Load
Current
3.0
2.0
1.0
0 3V
−1.0
−2.0
−3.0
1
L = 15 mH
VOUT = 3.3 V
CIN = 10 mF
COUT = 33 mF
2.2 V
VIN = 1.8 V
10 100 1000
ILOAD, OUTPUT LOADING CURRENT (mA)
Figure 16. Output Voltage Change versus Load
Current
200
160
120
80
100 mA
40
200 mA
VOUT = 3.3 V
CIN = 10 mF
COUT = 33 mF
L = 22 mH
200
160
120
80 100 mA
40
200 mA
VOUT = 3.3 V
CIN = 10 mF
COUT = 33 mF
L = 15 mH
0
1 1.5 2 2.5 3
VBATT, BATTERY INPUT VOLTAGE (V)
Figure 17. Battery Input Voltage versus Output
Ripple Voltage
0
1 1.5 2 2.5 3
VBATT, BATTERY INPUT VOLTAGE (V)
Figure 18. Battery Input Voltage versus Output
Ripple Voltage
20
16
12
8
4
0
0123456 7
VOUT, INPUT VOLTAGE AT OUT PIN (V)
Figure 19. No Load Operating Current versus
Input Voltage at OUT Pin
(VIN = 2.2 V, VOUT = 3.3 V, ILOAD = 100 mA; L = 22 mH,
COUT = 33 mF)
Upper Trace: Output Voltage Waveform, 2.0 V/Division
Lower Trace: Shutdown Pin Waveform, 1.0 V/Division
Figure 20. Startup Transient Response
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부품번호 | 상세설명 및 기능 | 제조사 |
NCP1410 | 250 mA Sync-Rect PFM Step-Up DC-DC Converter | ON |
NCP1411 | Sync-Rect PFM Step-Up DC-DC Converter | ON |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |