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參數資料
| 型號： | NCP1501DMR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩壓器 |
| 英文描述： | Dual Mode PWM/Linear Buck Converter |
| 中文描述： | 0.8 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 9/14頁 |
| 文件大小： | 161K |
| 代理商： | NCP1501DMR2 |
NCP1501
http://onsemi.com
9
APPLICATIONS INFORMATION
NCP1501 is a dual mode PWM or LDO step down
converter. This dual mode takes advantage of the best of
each mode. There are three required external components:
an input and output capacitor and an inductor.
The PWM mode allows high efficiency for larger loads.
A typical efficiency for an input of 3.6 V and an output of
1.8 V and 100 mA is over 90%. Low R
DSon
and
synchronous rectification contained within the device
contributes to the very high efficiency. As with other
synchronous rectification devices, the NCP1501 does not
require an external diode to supplement the NFET during
switching on or off. A synchronization pin allows the user
to define the frequency noise spikes of the PWM. The duty
cycle of the synchronization signal must be within the range
of 30% to 70%. The rising edge of the signal from the
synchronization pin acts as the oscillator signal to set the
latch and reset the ramp compensation signal. An Over
Voltage Protection circuit ensures the output will respond
properly to fast transients from large to small loads. The
NCP1501 allows the PWM mode to enter a 100% duty cycle
for fast load transient conditions and low input to output
voltage differentials.
The LDO mode is effective during low load conditions by
lowering the quiescent current and reducing the output
ripple voltage associated with PWM converters entering
PFM mode. NCP1501 enters the LDO mode when a
synchronization signal is not present. It is recommended to
pull the synchronization signal low for LDO mode.
Figure 9. Typical Operating Schematic
C
out
NCP1501
8
7
6
5
1
2
3
4
SHD
SYN
V
O
LX
CB0
CB1
GND
V
in
C
in
10 H
L
10
10
V
bat
V
out
C
in
, C
out
: 10 F Ceramic,
C2012X5R0J106M (TDK)
L: 10 H, LLF4017100 (TDK)
Figure 10. Input Current versus Voltage for the
Shutdown Pin
5
4
3
2
1
0
V
SHD
(V)
I
S
2.5
2
1.5
1
0.5
0
V
CC
= 3.6 V
T
A
= 25
°
C
Figure 11. Input Current versus Voltage for the
Synchronization Pin
4
3
2
1
0
V
SYN
(V)
I
S
2
1.8
1.2
1
0.2
0
V
CC
= 3.6 V
T
A
= 25
°
C
0.4
0.6
0.8
1.4
1.6
相關PDF資料 |
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| NCP1501 | Dual Mode PWM/Linear Buck Converter(雙模PWM/線性降壓轉換器) |
| NCP1501DMR2G | Dual Mode PWM/Linear Buck Converter |
| NCP1508 | Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package |
| NCP1508MNR2 | Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package |
| NCP1508MNR2G | Up to 500 mA, 1 MHz, High Efficiency Synchronous Step−Down DC−DC Converter in DFN Package |
相關代理商/技術參數 |
參數描述 |
|---|---|
| NCP1501DMR2G | 功能描述:直流/直流開關轉換器 Dual Mode Buck w/LDO RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| NCP1508MNR2 | 功能描述:直流/直流開關轉換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| NCP1508MNR2G | 功能描述:直流/直流開關轉換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| NCP1509MNR2 | 功能描述:直流/直流開關轉換器 High Efficiency Buck RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| NCP1509MNR2G | 功能描述:直流/直流開關轉換器 High Efficiency Buck Synchronous DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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