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參數(shù)資料
| 型號(hào)： | NCV8842PWR2G |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A, 170 kHz, Buck Regulator with Synchronization Capability |
| 中文描述： | 3 A SWITCHING REGULATOR, 187 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | LEAD FREE, SOP-16 |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大?。?/td> | 186K |
| 代理商： | NCV8842PWR2G |
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NCV8842
http://onsemi.com
3
PACKAGE PIN DESCRIPTION
SO8
SO16
PIN SYMBOL
FUNCTION
1
15
BOOST
The BOOST pin provides additional drive voltage to the onchip NPN power
transistor. The resulting decrease in switch on voltage increases efficiency.
2
16
V
IN
This pin is the main power input to the IC.
3
1
V
SW
This is the connection to the emitter of the onchip NPN power transistor and
serves as the switch output to the inductor. This pin may be subjected to nega-
tive voltages during switch offtime. A catch diode is required to clamp the pin
voltage in normal operation. This node can stand 1.0 V for less than 50 ns
during switch node flyback.
4
2
SHDNB
The shutdown pin is active low and TTL compatible. The IC goes into sleep
mode, drawing less than 1.0 A when the pin voltage is pulled below 1.0 V.
This pin should be left floating in normal position.
5
7
SYNC
This pin provides the synchronization input.
6
8
GND
Power return connection for the IC.
7
9
V
FB
The FB pin provides input to the inverting input of the error amplifier. If V
FB
is
lower than 0.29 V, the oscillator frequency is divided by four, and current limit
folds back to about 1 ampere. These features protect the IC under severe over-
current or short circuit conditions.
8
10
V
C
The V
pin provides a connection point to the output of the error amplifier and
input to the PWM comparator. Driving of this pin should be avoided because
onchip test circuitry becomes active whenever current exceeding 0.5 mA is
forced into the IC.
3 6, 11 14
NC
No Connection
PIN CONNECTIONS
1
16
V
FB
GND
V
C
SYNC
NC
NC
NC
NC
NC
NC
NC
NC
BOOST
SHDNB
V
IN
V
SW
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
BOOST
V
IN
V
IN
V
IN
Vsw
V
SW
V
SW
SHDNB
NC
NC
V
C
V
FB
NC
NC
GND
NC
NC
SYNC
SO16
18Lead DFN
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| NCV8843DG | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 340 KHZ REGULATOR RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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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| NCV8843MNR2G | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 18L DFN 5X6 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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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