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参数资料
| 型号： | LV5749NV-TLM-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 5/6页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-SSOP |
| 标准包装： | 2,000 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 140kHz |
| 电源电压： | 8.5 V ~ 42 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-LSSOP（0.175"，4.40mm 宽） |
| 包装： | 带卷 (TR) |
LV5749NV
Timing Chart
When the MODE pin is set to the high level and the point of the over current detection is set by using the ILIM pin is
exceeded, the value becomes double the original value.
Also, when the MODE pin is set to the low level, the point of over current detection remains an original value.
Timing chart of the over current detection point switching is as below.
t
1.25V
OCP
0V
VOUT = 1 + R3 × VREF = 1 + R3 × 0.67(typ) [V]
over current detection point during High MODE
over current detection point during Low MODE
Load Current
Setting Chart
1. Output voltage setting
? Setting of the output voltage VOUT is as follows.
R4 R4
2. Soft Start setting
? Setting of capacitor C5 is as follows.
current limit × 2A
For example 6A
current limit × 1A
For example 3A
Iss × Tss
C5 = V REF
=
5 μ × Tss
0.67
[F]
Iss : Charge current value.
Tss : Soft Start time
3. OCP Timer setting
? Setting of OCP timer capacitor C11 is as follows.
Iocp × Tocp
C11 = Vocp comp1 =
5 μ × Tocp
1.3
[F]
Iocp : Charge current value.
Tocp : OCP time
4. Current limiter setting
? Setting of the current limiter set resistance R5 is as follows.
R5 =
Rdson × Iout
Iilim
=
Rdson × IL max
18.5 μ
[ Ω ]
Iilim : ILIM current value.
IL : inductance current value
Rdson : ON resistance value between Q1 drain-souces.
No.A1684-5/6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LV5749V | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1-channel Step-down Switching Regulator |
| LV5749V-MPB-E | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LV5749V-TLM-E | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LV574A | 制造商:TI 制造商全称:Texas Instruments 功能描述:OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS |
| LV5761V | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1-channel Step-down Switching Regulator |
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