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参数资料
| 型号： | LTC3541EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/20页 |
| 文件大小： | 368K |
| 描述： | IC REG DL BCK/LINEAR SYNC 10-DFN |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 拓扑： | 降压（降压）同步（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 2 |
| 频率 - 开关： | 2.25MHz |
| 电压/电流 - 输出 1： | 0.8 V ~ 5 V，500mA |
| 电压/电流 - 输出 2： | 0.4 V ~ 4.1 V，300mA |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 是 |
| 电源电压： | 0.9 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-DFN（3x3） |
| 包装： | 带卷 (TR) |
LTC3541
3541fa
PERATIO
The LTC3541 contains a high efficiency synchronous
buck converter, a very low dropout regulator (VLDO) and
a linear regulator. It can be used to provide up to two
output voltages from a single input voltage making the
LTC3541 ideal for applications with limited board space.
The combination and configuration of these major blocks
within the LTC3541 is determined by way of the control
pins ENBUCK and ENVLDO as defined in Table 1.
With the ENBUCK pin driven to a logic high and ENVLDO
driven to a logic low, the LTC3541 enables the buck con-
verter to efficiently reduce the voltage provided at the V
IN
input pin to an output voltage which is set by an external
feedback resistor network. The buck regulator can be con-
fgured for Pulse-Skip or Burst Mode operation by driving
the MODE pin to a logic high or logic low respectively. The
buck regulator is capable of providing a maximum output
current of 500mA, which must be taken into consideration
when using the buck regulator to provide the power for
both the VLDO and for external loads.
With the ENBUCK pin driven to a logic low and ENVLDO
driven to a logic high, the LTC3541 enables the linear
regulator, providing a low noise regulated output voltage
at the LV
OUT
pin while drawing minimal quiescent current
from the V
IN
input pin. This feature allows output voltage
LV
OUT
to be brought into regulation without the presence
of the LV
IN
voltage.
With the ENBUCK and ENVLDO pins both driven to a
logic high, the LTC3541 enables the high efficiency buck
converter and VLDO regulator, providing dual output opera-
tion from a single input voltage. When configured in this
manner, the LTC3541s auto start-up sequencing feature
will bring the buck output into regulation in a controlled
manner prior to enabling the VLDO regulator without the
U CTIO AL BLOCK DIAGRA
U U
+
VLDO/LINEAR REG
LFB
3541 F01
PGND
GND
500mA BUCK
SW
V
IN
REF
ENVLDO
MODE
FB
GND PGND
REF
REF
LFB
CNTRL
GND
LV
IN
V
IN
CONTROL
LOGIC
4
LV
IN
6
BUCKFB
I
OUT(BUCK)
= 500mA
LV
OUT
5
8
ENBUCK
V
IN
IN(MIN)
e LV
OUT
+ 1.4V
SW
1
10
10礔
22pF
2.2礔
LV
OUT(MAX)
< V
IN
1.4V
I
OUT
= 300mA (VLDO REG)
I
OUT
= 30mA (LINEAR REG)
2.2礖
11
7
3
2
9
Figure 1. LTC3541 Functional Block Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3542 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz Synchronous Step-Down DC/DC Converter |
| LTC3542-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, 2.25MHz 2.8V Output Synchronous Step-Down DC/DC Converter |
| LTC3542EDC#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 2.25MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 2.25MHZ, 500mA, DFN-6; Primary Input Voltage:5.5V; No. of Outputs:1; Output Current:500mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-DFN ;RoHS Compliant: Yes |
| LTC3542EDC#TRMPBF | 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN 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:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 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:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
| LTC3542EDC#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.5A 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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