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參數資料
| 型號： | NCP1422MNR2 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩壓器 |
| 英文描述： | 800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer |
| 中文描述： | 1.5 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, 0.50 MM PITCH, PLASTIC, DFN-10 |
| 文件頁數： | 8/14頁 |
| 文件大?。?/td> | 142K |
| 代理商： | NCP1422MNR2 |
NCP1422
http://onsemi.com
8
TYPICAL OPERATING CHARACTERISTICS
50
60
70
80
90
100
1
10
100
1000
NCP1422
V
OUT
= 1.8 V
L = 6.8 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25 C
OUTPUT LOADING CURRENT, I
OUT
/mA
E
50
60
70
80
90
100
1
10
100
1000
NCP1422
V
OUT
= 3.3 V
L = 6.8 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25 C
OUTPUT LOADING CURRENT, I
OUT
/mA
E
50
60
70
80
90
100
1
10
100
1000
Figure 20. Efficiency vs. Load Current
Figure 21. Efficiency vs. Load Current
Figure 22. Efficiency vs. Load Current
NCP1422
V
OUT
= 5.0 V
L = 6.8 H
C
IN
= 22 F
C
OUT
= 22 F
T
A
= 25 C
OUTPUT LOADING CURRENT, I
OUT
/mA
E
V
IN
= 2.5 V
V
IN
= 1.5 V
V
IN
= 2.0 V
V
IN
= 3.3 V
V
IN
= 1.5 V
V
IN
= 2.5 V
V
IN
= 1.5 V
V
IN
= 1.2 V
DETAILED OPERATION DESCRIPTION
NCP1422 is a monolithic micropower highfrequency
stepup voltage switching converter IC specially designed
for battery operated handheld electronic products up to
800 mA loading. It integrates a Synchronous Rectifier to
improve efficiency as well as to eliminate the external
Schottky diode. High switching frequency (up to 1.2 MHz)
allows for a low profile inductor and output capacitor to be
used. LowBattery Detector, LogicControlled Shutdown,
and CyclebyCycle Current Limit provide valueadded
features for various batteryoperated applications. With all
these functions ON, the quiescent supply current is
typically only 8.5 A. This device is available in a compact
DFN10 package.
PFM Regulation Scheme
From the simplified functional diagram (Figure 1), the
output voltage is divided down and fed back to pin 1 (FB).
This voltage goes to the noninverting input of the PFM
comparator whereas the comparator’s inverting input is
connected to the internal voltage reference, REF. A
switching cycle is initiated by the falling edge of the
comparator, at the moment the main switch (M1) is turned
ON. After the maximum ONtime (typically 0.72 S)
elapses or the current limit is reached, M1 is turned OFF
and the synchronous switch (M2) is turned ON. The M1
OFF time is not less than the minimum OFFtime
(typically 0.12
S), which ensures complete energy
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| NCP1422MNR2G | 功能描述:直流/直流開關轉換器 800mA PFM Boost w/Ring Killer 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 |
| NCP1423DMR2 | 功能描述:直流/直流開關轉換器 800mA PFM Boost 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 |
| NCP1423DMR2G | 功能描述:直流/直流開關轉換器 800mA PFM Boost w/Ring Killer 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 |
| NCP1423EVB | 功能描述:電源管理IC開發工具 ANA NCP1423 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| NCP1442FR4 | 功能描述:IC REG MULTI CONFIG POWERFLEX7 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
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