参数资料
| 型号： | LV5747NTT-TLM-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/5页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM 12-MSOP |
| 标准包装： | 2,000 |
| PWM 型： | 控制器 |
| 输出数： | 1 |
| 频率 - 最大： | 340kHz |
| 电源电压： | 8 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： | 12-TFSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
LV5747NTT
Block Diagram
VIN 10
5V
REGULATOR
REFERENCE
VOLTAGE
TSD
UVLO
ILIM 11
5 μ A
20 μ A
-
+
OCP Comp
VIN
+
-
Current
Amp
S
R
Q
5 CBOOT
+
SS 12
FB 1
COMP 2
0.7V
1.1V
SD
+
-
+
-
SD
Err
Amp
S
R
Q
SAW WAVE
OSCILLATOR
fosc forcec
1/8
DMAX = 90%
1.1V
0.5V
-
+
PWM Comp
CONTROL
Logic
5V
6 HDRV
4 SW
8 VDD
7 LDRV
0.5V
+
-
FFOLD
Amp
3
shut down(SD)
9 GND
EN
Pin Function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
Pin name
FB
COMP
EN
SW
CBOOT
HDRV
LDRV
VDD
GND
VIN
ILIM
SS
Description
Error amplifier reverse input pin. By operating the converter, the voltage of this pin becomes 0.708V.
The voltage in which the output voltage is divided by an external resistance is applied to this pin. Moreover, when this pin
voltage becomes 0.5V or less after a soft start ends, the frequency fold back function operations, and the oscillating frequency
is falling with the FB voltage.
Error amplifier output pin. Connect a phase compensation circuit between this pin and FB.
ON/OFF pin.
Pin to connect with switching node. The source of NchMOSFET connects to this pin.
Bootstrap capacity connection pin. This pin becomes a GATE drive power supply of an external NchMOSFET.
Connect a bypath capacitor between CBOOT and SW.
An external the upper MOSFET gate drive pin.
An external the lower MOSFET gate drive pin.
Power supply pin for an external the lower MOS-FET gate drive.
Ground pin. Each reference voltage is based on the voltage of the ground pin.
Power supply pin. This pin is monitored by UVLO function. When the voltage of this pin becomes 7.8V or more by UVLO
function, The IC starts and the soft start function operates.
Reference current pin for current detection. The sink current of about 20 μ A flows to this pin.
When a resistance is connected between this pin and VIN outside and the voltage applied to the SW pin is lower than the
voltage of the terminal side of the resistance, the upper NchMOSFET is off by operating the current limiter comparator.
This operation is reset with respect to each PWM pulse.
Pin to connect a capacitor for soft start. A capacitor for soft start is charged by using the voltage of about 5 μ A.
This pin ends the soft start period by using the voltage of about 1.1V and the frequency fold back function becomes active.
No.A1759-4/5
相关PDF资料 |
PDF描述 |
|---|---|
| LV5749NV-TLM-E | IC REG CTRLR BUCK PWM CM 16-SSOP |
| LV5761V-TLM-E | IC REG CTRLR BUCK PWM CM 16-SSOP |
| LV5768M-TLM-H | IC REG CTRLR BUCK PWM CM MFP14S |
| LV5781-TLM-E | IC REG BUCK 3.3V 3A 14HSSOP |
| LV5857MX-TLM-H | IC REG BUCK SYNC ADJ 3A MFP8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LV5747QA | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1-channel Step-down Switching Regulator |
| LV5747QA-NH | 制造商:ON Semiconductor 功能描述:DC-DC CONVERTER (BUCK) - Tape and Reel |
| LV5747TT | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1-channel Step-down Switching Regulator |
| LV5749NV | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:1-channel Step-down Switching Regulator |
| LV5749NV-MPB-E | 制造商:ON Semiconductor 功能描述:42V PWM BUCK CONTROLLER - Ammo Pack |
发布紧急采购，3分钟左右您将得到回复。