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参数资料
| 型号： | LTC3405ES6#TRMPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ .3A SOT23-6 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 6 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 300mA |
| 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-23-6 细型，TSOT-23-6 |
| 包装： | 标准包装 |
| 供应商设备封装： | TSOT-23-6 |
| 产品目录页面： | 1334 (CN2011-ZH PDF) |
| 其它名称： | LTC3405ES6#TRMPBFDKR |
LTC3405
1.5MHz, 300mA
Synchronous Step-Down
Regulator in ThinSOT
FEATURES
DESCRIPTIO
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High Efficiency: Up to 96%
Very Low Quiescent Current: Only 20 μ A
During Operation
300mA Output Current at V IN = 3V
2.5V to 5.5V Input Voltage Range
1.5MHz Constant Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
0.8V Reference Allows Low Output Voltages
Shutdown Mode Draws < 1 μ A Supply Current
± 2% Output Voltage Accuracy
Current Mode Operation for Excellent Line and
Load Transient Response
Overtemperature Protected
Low Profile (1mm) ThinSOT TM Package
The LTC ? 3405 is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 20 μ A and drops to <1 μ A in shutdown. The 2.5V to
5.5V input voltage range makes the LTC3405 ideally suited
for single Li-Ion battery-powered applications. 100% duty
cycle provides low dropout operation, extending battery
life in portable systems.
Switching frequency is internally set at 1.5MHz, allowing
the use of small surface mount inductors and capacitors.
The internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. Low
output voltages are easily supported with the 0.8V feed-
back reference voltage. The LTC3405 is available in a low
APPLICATIO S
profile (1mm) ThinSOT package.
For new designs, refer to the LTC3405A data sheet. For
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Cellular Telephones
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
fixed 1.5V and 1.8V output versions, refer to the
LTC3405A-1.5/LTC3405A-1.8 data sheet.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
Protected by U.S. Patents, including 6580258, 5481178.
TYPICAL APPLICATIO
100
95
V IN = 3.6V
C IN
V IN
2.7V
TO 5.5V
?
2.2 μ F
CER
4
1
6
V IN SW
LTC3405
RUN
MODE V FB
GND
2
3
5
4.7 μ H**
22pF
887k
280k
+
V OUT *
3.3V
C OUT ??
33 μ F
90
85
80
75
70
V IN = 4.2V
V IN = 5.5V
3405 F01a
* V OUT CONNECTED TO V IN FOR 2.7V < V IN < 3.3V
65
TAIYO YUDEN LMK212BJ225MG
AVX TPSB336K006R0600
** MURATA LQH3C4R7M34
?
??
60
0.1
1 10 100
OUTPUT CURRENT (mA)
1000
3405 F01b
Figure 1a. High Efficiency Step-Down Converter
Figure 1b. Efficiency vs Load Current
3405fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3406 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3406-1.2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT |
| LTC3406-1.5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5MHz, 600mA Synchronous Step-Down egulator in ThinSOT |
| LTC3406-1.8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5MHz, 600mA Synchronous Step-Down egulator in ThinSOT |
| LTC3406A | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Battery Charger/USB Power Manager |
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