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参数资料
| 型号： | LTC3252EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SWITCHED CAP 12DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），切换电容（充电泵） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.9 V ~ 1.6 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1MHz ~ 1.6MHz |
| 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： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN（4x3） |
LTC3252
Dual, Low Noise,
Inductorless Step-Down
DC/DC Converter
FEATURES
DESCRIPTIO
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2.7V to 5.5V Input Voltage Range
No Inductors
Typical Efficiency 50% Higher than LDOs
Spread Spectrum Operation
Low Input and Output Noise
Shutdown Disconnects Load from V IN
Dual Adjustable Independent Outputs
(Range: 0.9V to 1.6V)
Output Current: 250mA Each Output
Low Operating Current: I IN = 60 μ A Typ
(35 μ A with One Output Enabled)
Low Shutdown Current: I IN = 0.01 μ A Typ
Soft-Start Limits Inrush Current at Turn On
Short Circuit and Over Temperature Protected
Available in 4mm × 3mm 12-Pin DFN Package
The LTC ? 3252 is a switched capacitor step-down DC/DC
converter that produces two adjustable regulated outputs
from a single 2.7V to 5.5V input. The part uses switched
capacitor fractional conversion to achieve a typical effi-
ciency increase of 50% over that of a linear regulator. No
inductors are required.
A unique constant frequency, spread spectrum architec-
ture provides a very low noise regulated output as well as
low noise at the input. The part also has Burst Mode ?
operation to provide high efficiency at low output currents,
as well as ultralow current shutdown.
Low operating currents (60 μ A with both outputs enabled,
35 μ A with one output enabled) and low external parts
count make the LTC3252 ideally suited for space-con-
strained battery-powered applications. The part is short-
Handheld Electronic Devices
Cellular Phones
APPLICATIO S
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circuit and overtemperature protected and is available in a
tiny 4mm × 3mm 12-pin DFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
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Low Voltage Logic Supplies
DSP Power Supplies
3.3V to 1.5V Conversion
TYPICAL APPLICATIO
1.5V and 1.2V Output Voltages with Shutdown
1.5V/1.2V Efficiency vs Input Voltage
100
1-CELL
Li-ION
OR 3-CELL
NiMH
OFF ON
OFF ON
4.7 μ F
2
11
3
4
1 μ F 6
EN1
EN2
V IN
C1 +
C1 –
OUT1
FB1
LTC3252
5
1
470k
510k
V OUT = 1.5V
I OUT ≤ 250mA
4.7 μ F
90
80
70
60
50
LTC3252-1.2V
I OUT (1.5V) = 100mA
I OUT (1.2V) = 100mA
LTC3252-1.5V
10
1 μ F 8
7
C2 +
C2 –
GND
OUT2
FB2
9
12
261k
V OUT = 1.2V
I OUT ≤ 250mA
4.7 μ F
40
30
20
LDO-1.5V
LDO-1.2V
510k
10
3252 TA01
0
2.7
3.1
3.5
3.9
4.3
4.7
5.1
5.5
V IN (V)
3252 TA01a
3252f
1
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相关代理商/技术参数 |
参数描述 |
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| LTC3255EDD#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-DFN 制造商:Linear Technology 功能描述:IC, STEP DWN CHARGE PUMP, 500KHZ, DFN-10 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch |
| LTC3255EDD#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-DFN |
| LTC3255EMSE#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-MSOP 制造商:Linear Technology 功能描述:IC, STEP DWN CHARGE PUMP, 500KHZ, MSOP10 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK, ADJ, 500KHZ, MSOP-10, Primary Input Voltage:48V, No. of Outputs:1, Output Current:50mA, No. of Pins:10, Operating Temperature Min:-40C, Operating Temperature Max:125C, Package / Case:10-MSOP , RoHS Compliant: Yes |
| LTC3255EMSE#TRPBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-MSOP 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch |
| LTC3255HDD#PBF | 制造商:Linear Technology 功能描述:IC REG BUCK SWITCHED CAP 10-DFN 制造商:Linear Technology 功能描述:IC, STEP DWN CHARGE PUMP, 500KHZ, DFN-10 制造商:Linear Technology 功能描述:DC-DC CONV, BUCK, ADJ, 500KHZ, DFN-10, Primary Input Voltage:48V, No. of Outputs:1, Output Current:50mA, No. of Pins:10, Operating Temperature Min:-40C, Operating Temperature Max:150C, Package / Case:10-DFN , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:DP-Charge Pump/General Purpose, Wide VIN Range Fault Protected 50mA Step-Down Ch |
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