参数资料
| 型号： | NCV890231MWTXG |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10-DFN |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 4.5 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 10-DFN（3x3） |
| 其它名称： | NCV890231MWTXGOSDKR |
NCV890231
VIN
DRV
SYNCO
GND
EN
1
2
3
4
5
10
9
8
7
6
SW
BST
SYNCI
FB
COMP
(Top View)
Figure 3. Pin Connections
PIN FUNCTION DESCRIPTIONS
Pin No.
1
2
3
4
5
6
7
8
9
10
Exposed
Pad
Symbol
VIN
DRV
SYNCO
GND
EN
COMP
FB
SYNCI
BST
SW
Description
Input voltage from battery. Place an input filter capacitor in close proximity to this pin.
Output voltage to provide a regulated voltage to the Power Switch gate driver.
Synchronization output. Turn ? on of the Power Switch causes the SYNCO signal to fall. SYNCO rises
half a switching period later. Connecting to the SYNCI pin of another NCV890231 causes them to switch
out ? of ? phase
Battery return, and output voltage ground reference.
This TTL compatible Enable input allows the direct connection of Battery as the enable signal. Grounding
this input stops switching and reduces quiescent current draw to a minimum.
Error Amplifier output, for tailoring transient response with external compensation components.
Feedback input pin to program output voltage, and detect pre ? charged or shorted output conditions.
Synchronization input. Connecting an external clock to the SYNCI pin synchronizes switching to the
rising edge of the SYNCI voltage.
Bootstrap input provides drive voltage higher than VIN to the N ? channel Power Switch for optimum
switch R DS(on) and highest efficiency.
Switching node of the Regulator. Connect the output inductor and cathode of the freewheeling diode to
this pin.
Connect to Pin 4 (electrical ground) and to a low thermal resistance path to the ambient temperature
environment.
http://onsemi.com
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