圖片僅供參考
| FLYiNG 零件編號 | ICEA7142M8RADJAiT |
| FLYiNG 散料庫存 | 10 |
| FLYiNG 標準包裝庫存 | 電洽/Contact |
| 製造商/品牌商 | AiT Semiconductor Inc. |
| 製造商/品牌商零件編號 | A7142M8R-ADJ |
| 說明 | IC A7142M8R-ADJ SOP8 AiT |
| 無鉛狀態 / RoHS 指令狀態 | RoHS |
| 類別 | DC-DC CONVERTER/ BUCK (STEP-DOWN) SIMPLE SWITCHER POWER CONVERTER 150kHz, 2A PWM |
| 系列 | A7142 |
| 零件編號 | IC A7142M8R-ADJ SOP8 AiT |
| 切換模式 | BUCK |
| 輸入電壓 | 45V |
| 輸出電壓 | 1.23V~37V |
| 靜態電流 | 10mA |
| 輸出電流 | 2A |
| 頻率 | 150KHz |
| 儲存溫度 | -65 °C to +150 °C |
| 工作溫度 | -40~125 ℃ |
| 封裝／外殼 | SOP8 |
| 安裝類型 | SMD 表面黏著式 |
| 無鉛狀態 RoHS | RoHS |
| 標準包裝數量 | 2500/Reel 捲軸 |
文件:A7142.png)
A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
SIMPLE SWITCHER POWER CONVERTER 150kHz, 2A PWM
DESCRIPTION
The A7142 series of regulators are monolithic
integrated circuits that provide all the active
functions for a step-down (buck) switching
regulator, capable of driving 2A load with excellent
line and load regulation. These devices are
available in fixed output voltages of 5V and an
adjustable output versions.
Requiring a minimum number of external
components, these regulators are simple to use and
include internal frequency compensation, and a
fixed-frequency oscillator. The A7142 series
operates at a switching frequency of 150KHz thus
allowing smaller sized filter components than what
would be needed with lower frequency switching
regulators.
Some features include a guaranteed ±4% tolerance
on output voltage under specified input voltage and
output load conditions, and ±15% on the oscillator
frequency. External shutdown is included, featuring
typically 50μA standby current. The output switch
includes cycle-by-cycle current limiting, as well as
thermal shutdown for full protection under fault
conditions. The oscillator frequency reduces in the
event of an output short or an overload which
causes the regulated output voltage to drop
approximately 40% from the nominal output
voltage.
The A7142 is available in SOP8 and PSOP8
packages.
FEATURES
應用範圍
A7142
DC-DC CONVERTER/ BUCK (STEP-DOWN)
SIMPLE SWITCHER POWER CONVERTER 150kHz, 2A PWM
DESCRIPTION
The A7142 series of regulators are monolithic
integrated circuits that provide all the active
functions for a step-down (buck) switching
regulator, capable of driving 2A load with excellent
line and load regulation. These devices are
available in fixed output voltages of 5V and an
adjustable output versions.
Requiring a minimum number of external
components, these regulators are simple to use and
include internal frequency compensation, and a
fixed-frequency oscillator. The A7142 series
operates at a switching frequency of 150KHz thus
allowing smaller sized filter components than what
would be needed with lower frequency switching
regulators.
Some features include a guaranteed ±4% tolerance
on output voltage under specified input voltage and
output load conditions, and ±15% on the oscillator
frequency. External shutdown is included, featuring
typically 50μA standby current. The output switch
includes cycle-by-cycle current limiting, as well as
thermal shutdown for full protection under fault
conditions. The oscillator frequency reduces in the
event of an output short or an overload which
causes the regulated output voltage to drop
approximately 40% from the nominal output
voltage.
The A7142 is available in SOP8 and PSOP8
packages.
FEATURES
- 5V and adjustable output versions
- Adjustable version output voltage range, 1.23V to 37V ± 3% max over line and load conditions
- Guaranteed 2A output current
- Wide input voltage range
- Requires only 4 external components
- 150 kHz fixed frequency oscillator
- TTL shutdown capability, low power standby mode
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
- Simple high-efficiency step-down (buck) regulator
- On-card switching regulators
- Positive to negative converter
A7142
DC-DC 降壓型轉換器（Buck Step-Down）
150kHz、2A PWM 簡易型交換式電源轉換器
產品描述
A7142 系列穩壓器為單晶片整合電路，內建降壓型（Buck）交換式穩壓器所需之全部主動功能，可驅動 2A 負載，並具備優異的輸入電壓調整率（Line Regulation）與負載調整率（Load Regulation）。本系列提供固定 5V 輸出版本及可調式輸出版本。
本產品僅需極少數外部元件即可運作，使用簡單，並內建頻率補償及固定頻率振盪器。A7142 系列工作切換頻率為 150kHz，相較於低頻交換式穩壓器，可使用更小尺寸的濾波元件。
本產品特色包含：在規定輸入電壓及輸出負載條件下，輸出電壓保證誤差為 ±4%，振盪器頻率誤差為 ±15%。並支援外部關斷控制（Shutdown），待機電流典型值僅 50μA。輸出開關內建逐週期電流限制（Cycle-by-Cycle Current Limiting）及過溫保護（Thermal Shutdown），可於異常狀況下提供完整保護。
當輸出短路或過載導致輸出電壓下降至額定值約 40% 時，振盪器頻率將自動降低，以提升系統保護能力。
A7142 提供 SOP8 與 PSOP8 封裝形式。
產品特性
- 提供固定 5V 及可調式輸出版本
- 可調式版本輸出電壓範圍：1.23V ～ 37V，於輸入與負載條件變化下最大誤差 ±3%
- 保證 2A 輸出電流能力
- 寬範圍輸入電壓
- 僅需 4 個外部元件
- 150kHz 固定頻率振盪器
- 支援 TTL 關斷功能與低功耗待機模式
- 可搭配市售標準電感使用
- 內建過溫保護與限流保護功能
應用範圍
- 高效率降壓型（Buck）穩壓器
- 板載型交換式穩壓電源
- 正負電壓轉換器