- 您现在的位置：买卖IC网 > PDF目录30768 > LTC1174HVCS8#TR-5 (LINEAR TECHNOLOGY CORP) SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | LTC1174HVCS8#TR-5 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 0.150 INCH, PLASTIC, SO-8 |
| 文件页数： | 2/20页 |
| 文件大小： | 241K |
| 代理商： | LTC1174HVCS8#TR-5 |
10
LTC1174
LTC1174-3.3/LTC1174-5
Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC1174. These items are also illustrated graphically in
the layout diagram in Figure 7. Check the following in your
layout:
1. Is the Schottky catch diode
closely connected between
ground (Pin 4) and switch (Pin 5)?
2. Is the “+” plate of CIN closely connected to VIN (Pin 6)?
This capacitor provides the AC current to the internal
P-channel MOSFET.
3. Is the 0.1
F VIN decoupling capacitor closely conected
between VIN (Pin 6) and ground (Pin 4)? This capacitor
carries the high frequency peak currents.
4. Is the SHUTDOWN (Pin 8) actively pulled to VIN during
normal operation? The SHUTDOWN pin is high imped-
ance and must not be allowed to float.
5. Is the IPGM (Pin 7) pulled either to VIN or ground? The
IPGM pin is high impedance and must not be allowed
to float.
Figure 7. LTC1174 Layout Diagram (See Board Layout Checklist)
Figure 6. Preventing Absolute Maximum
Ratings from Being Exceeded
APPLICATIO S I FOR ATIO
WU
UU
Prevention against latchup can be accomplished by sim-
ply connecting a Schottky diode across the SW and VIN
pins as shown in Figure 6. The diode will normally be
reverse biased unless VIN is pulled below VOUT at which
time the diode will clamp the (VOUT – VIN) potential to less
than the 0.6V required for latchup. Note that a low leakage
Schottky should be used to minimize the effect on no-load
supply current. Schottky diodes such as MBR0530, BAS85
and BAT84 work well. Another more serious effect of the
protection diode leakage is that at no load with nothing to
provide a sink for this leakage current, the output voltage
can potentially float above the maximum allowable toler-
ance. To prevent this from occuring, a resistor must be
connected between VOUT and ground with a value low
enough to sink the maximum possible leakage current.
1174 F06
VIN
VOUT
LATCHUP
PROTECTION
SCHOTTKY
SW
LTC1174
LTC1174-3.3
LTC1174-5
+
3
LTC1174
2
SW
R1
8
7
6
1
5
4
L
VOUT
D
1174 F07
OUTPUT DIVIDER
REQUIRED WITH
ADJUSTABLE
VERSION ONLY
0.1
F
LBOUT
LBIN
GND
SHUTDOWN
IPGM
VIN
R2
BOLD LINES INDICATE
HIGH CURRENT PATH
VIN
CIN
COUT
VOUT
(VFB)
+
相关PDF资料 |
PDF描述 |
|---|---|
| LTC1174CS8#TR-5 | SWITCHING REGULATOR, 200 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC1436CGN | 2 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO24 |
| LTC1436IGN | 2 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO24 |
| LTC1551CS8 | SWITCHED CAPACITOR REGULATOR, PDSO8 |
| LTC1429CS8 | SWITCHED CAPACITOR REGULATOR, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1174HVIS8 | 功能描述:IC REG BUCK INV ADJ 1A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC1174HVIS8#PBF | 功能描述:IC REG BUCK INV ADJ 1A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC1174HVIS8#TR | 功能描述:IC REG BUCK INV ADJ 1A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC1174HVIS8#TRPBF | 功能描述:IC REG BUCK INV ADJ 1A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC1174IN8 | 功能描述:IC REG BUCK INV ADJ 1A 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
发布紧急采购，3分钟左右您将得到回复。