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參數(shù)資料
| 型號： | NCP1508 |
| 廠商： | ON SEMICONDUCTOR |
| 英文描述： | Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package |
| 文件頁數(shù)： | 1/15頁 |
| 文件大小： | 414K |
| 代理商： | NCP1508 |
Semiconductor Components I1dustries, LLC, 2006
July, 2006
Rev. 1
1
Publication Order Number:
NCP1508/D
NCP1508
Up to 500 mA, 1 MHz, High
Efficiency Synchronous
StepDown DCDC
Converter in DFN Package
The NCP1508 step
down PWM DC
DC converter is optimized
for portable applications powered from 1
cell Li
ion or 3 cell
Alkaline/NiCd/NiMH batteries. This DC
DC converter utilizes a
current
mode control architecture for easy compensation and better
line regulation. It also uses synchronous rectification to increase
efficiency and reduce external part count. The NCP1508 optimizes
efficiency in light load conditions when switched from a normal
PWM mode to a “pulsed switching” mode. The device also has a
built
in 1 MHz (nominal) oscillator for the PWM circuitry, or it can
be synchronized to an external 500 kHz to 1000 kHz clock signal.
Finally, it includes an integrated soft
start, cycle
by
cycle current
limiting, and thermal shutdown protection. The NCP1508 is
available in a space saving, low profile 3x3 mm 10 pin DFN package.
Features
High Efficiency:
93% for 1.89 V Output at 3.6 V Input and 125 mA Load Current
91% for 1.89 V Output at 3.6 V Input and 300 mA Load Current
Digital Programmable Output Voltages: 1.0, 1.3, 1.5 or 1.89 V
Output Current up to 500 mA at V
in
= 3.6 V
Low Quiescent Current of 14 A in Pulsed Switching Mode
Low 0.2 A Shutdown Current
30
°
C to 85
°
C Operation Temperature
Low Profile DFN Package
Pb
Free Package is Available
Application
Cellular Phones, Smart Phones and PDAs
Digital Still Cameras
MP3 Players and Portable Audio Systems
Wireless and DSL Modems
Portable Equipment
MARKING
DIAGRAM
http://onsemi.com
1508 = Specific Device Code
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W
= Work Week
10 PIN DFN
MN SUFFIX
CASE 485C
1508
ALYW
Device
Package
Shipping
ORDERING INFORMATION
10 Pin DFN
NCP1508MNR2
10 Pin DFN
(Pb
Free)
3000 Tape & Reel
NCP1508MNR2G
3000 Tape & Reel
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.
1
1
Figure 1. Typical Application Circuit
VCC
VCCP
SHD
SYNC
GNDA GNDP
CB0
CB1
FB
LX
V
in
2.7 V
5.2 V
6.8 H
V
out
C
out
22 H
CB0 and CB1
Control Input
C
in
10 H
10
9
4
5
7
8
6
3
0
10
20
30
40
50
60
70
80
90
100
0.001
0.1
1
10
100
1000
I
out
(mA)
E
Figure 2. Efficiency vs. Output Current
Pulsed Mode
V
in
= 3.6 V
V
out
= 1.5 V
0.01
PWM Mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NCP1508MNR2 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1508MNR2G | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1509MNR2 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1509MNR2G | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1510AFCT1 | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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