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参数资料
| 型号： | LTC3250ES6-1.5#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 1.5V 0.25A SOT23-6 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.5V |
| 输入电压： | 3.1 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 250mA |
| 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： | 剪切带 (CT) |
| 供应商设备封装： | SOT-23-6 |
| 产品目录页面： | 1339 (CN2011-ZH PDF) |
| 其它名称： | LTC3250ES6-1.5 LTC3250ES6-1.5#TRMCT LTC3250ES6-1.5-ND |
LTC3250-1.5/LTC3250-1.2
High Efficiency, Low Noise,
Inductorless Step-Down
DC/DC Converter
FEATURES
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
s
2.7V to 5.5V Input Voltage Range
No Inductors
Li-Ion (3.6V) to 1.5V with 81% Efficiency
Low Noise Constant Frequency Operation
Output Voltages: 1.5V ± 4%, 1.2V ± 4%
Output Current: 250mA
Shutdown Disconnects Load from V IN
Low Operating Current: I Q = 35 μ A
Low Shutdown Current: I SD < 1 μ A
Oscillator Frequency = 1.5MHz
Soft-Start Limits Inrush Current at Turn-On
Short-Circuit and Overtemperature Protected
Low Profile (1mm) SOT-23 Package
The LTC ? 3250-1.5/LTC3250-1.2 are charge pump step-
down DC/DC converters that produce a 1.5V or 1.2V
regulated output from a 2.7V to 5.5V input. The parts use
switched capacitor fractional conversion to achieve typi-
cal efficiency two times higher than that of a linear regu-
lator. No inductors are required.
A unique constant frequency architecture provides a low
noise regulated output as well as lower input noise
than conventional charge pump regulators.* High
frequency operation (f OSC = 1.5MHz) simplifies filtering
to further reduce conducted noise. The part also uses
Burst Mode ? operation to improve efficiency at light loads.
Low operating current (35 μ A with no load, <1 μ A in
Handheld Computers
Cellular Phones
APPLICATIO S
s
s
s Digital Cameras
s Handheld Medical Instruments
s Low Power DSP Supplies
TYPICAL APPLICATIO
Li-Ion to 1.5V Output with Shutdown
1 μ F
shutdown) and low external parts count (three small
ceramic capacitors) make the LTC3250-1.5/LTC3250-1.2
ideally suited for space constrained battery powered appli-
cations. The parts are short-circuit and overtemperature
protected, and are available in a low profile (1mm) 6-pin
ThinSOT TM package.
, LTC and LT are registered trademarks of Linear Technology Corporation
Burst Mode is a registered trademark of Linear Technology Corporation
ThinSOT is a trademark of Linear Technology Corporation.
*U.S. Patent #6, 411, 531
Efficiency vs Input Voltage
(I OUT = 100mA)
100
90
80
70
60
LTC3250-1.5
V IN
3.2V TO 4.2V
Li-Ion
1 μ F
C – C +
V IN V OUT
LTC3250-1.5
4.7 μ F
V OUT = 1.5V ± 4%
100mA
50
40
30
LDO
OFF ON
SHDN
GND
20
10
3250 TA1a
0
3.0
3.5
4.0 4.5
5.0
5.5
V IN (V)
3250 TA01b
3250fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3251 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter |
| LTC3251-1.2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter |
| LTC3251-1.5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA High Efficiency, Low Noise, Inductorless Step-Down DC/DC Converter |
| LTC3251EMSE | 功能描述:IC REG BUCK SWITCHED CAP 10MSOP 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC3251EMSE#PBF | 功能描述:IC REG BUCK SWITCHED CAP 10MSOP 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:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
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