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参数资料
| 型号： | LM1572MTC-3.3/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 570 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | TSSOP-16 |
| 文件页数： | 10/17页 |
| 文件大小： | 583K |
| 代理商： | LM1572MTC-3.3/NOPB |
Typical Applications (Fixed/Adjustable Voltage Parts) (Continued)
20033314
Connection Diagram
20033315
16-Lead TSSOP
NS Package Number MTC16
Pin Description
BOOT (Pin 1) - Bootstrap pin. It provides the upper rail for
the floating driver stage of the internal MOSFET switch, the
lower rail being the switching node (Pins 5 and 6). A small
decoupling capacitor (typically 0.1F-0.22F) is therefore
connected between the Bootstrap pin and the switching
node. This capacitor should be 0.18F-0.22F for applica-
tions with an output voltage greater than 3.3V, if the mini-
mum load (including the current drawn by internal/external
feedback resistor divider) is less than 1mA. Additional drive
voltage is provided by connecting this pin directly to the 5V
output rail via a diode as shown in the Typical Application
Circuit for the fixed voltage part. The same method can be
used for an adjustable part provided the part is adjusted for
an output of 5V. For other output voltages (between 2.42V to
5V) a more general method of providing this external drive
voltage is illustrated in the Typical Application Circuit for the
adjustable part. Note that the NPN signal transistor shown,
must have a guaranteed hfe greater than 400. Damage can
occur to Pin 1 if it is connected (via a diode) to any external
voltage source greater than 6V.
AV
IN (Pin 2) - This is the Analog VIN and provides the supply
to the internal control circuitry, the (Power) V
IN pins (Pins
3,4) providing the supply to the internal power stage. In the
simplest layout scheme, the Analog V
IN pin can simply be
connected to the V
IN pins directly on the pads where the IC
is mounted. But for better noise rejection the trace to Pin 2
can be routed separately from the (Power) V
IN trace, starting
from the positive terminal of the input capacitor. A simple RC
filter solution can also be used for better results, particularly
at low input voltages. This consists of a 10
resistor con-
nected between Analog V
IN and VIN, and a 0.47F capacitor
between Analog V
IN and Ground. Note that if this RC filter is
used, a 1M
resistor between Pin 1 and Ground is also
required.
LM1572
www.national.com
2
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相关代理商/技术参数 |
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| LM1572MTC-5.0/NOPB | 功能描述:IC REG BUCK 5V 1.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM1572MTC-ADJ | 制造商:Texas Instruments 功能描述:IC V REG BUCK 1.5A ADJ SMD 1572 |
| LM1572MTC-ADJ/NOPB | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM1572MTCX-3.3/NOPB | 功能描述:IC REG BUCK 3.3V 1.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
| LM1572MTCX-5.0/NOPB | 功能描述:IC REG BUCK 5V 1.5A 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:3.3V 输入电压:4.5 V ~ 24 V PWM 型:- 频率 - 开关:- 电流 - 输出:125mA 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 包装:Digi-Reel® 供应商设备封装:SOT-6 其它名称:MAX1836EUT33#TG16DKR |
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