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参数资料
| 型号： | LTC3443EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST SYNC ADJ 12DFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.4 V ~ 5.25 V |
| 输入电压： | 2.4 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 600kHz |
| 电流 - 输出： | 1.2A |
| 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： | 12-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 12-DFN（4x3） |
LTC3443
TYPICAL PERFOR A CE CHARACTERISTICS
(T A = 25 ° C unless otherwise specified)
Error Amp Sink Current
Output Frequency
Current Limit
400
V IN = V OUT = 3.6V
0.70
V IN = V OUT = 3.6V
3.4
V IN = V OUT = 3.6V
350
300
250
0.65
0.60
0.55
3.2
3.0
200
–55
–25
5 35 65
TEMPERATURE ( ° C)
95
125
0.50
–55
–25
5 35 65
TEMPERATURE ( ° C)
95
125
2.8
–55
–25
5 35 65
TEMPERATURE ( ° C)
95
125
NMOS R DS(ON)
3443 G12
PMOS R DS(ON)
3443 G13
Minimum Start Voltage
3443 G14
0.15
0.13
V IN = V OUT = 3.6V
SWITCHES B AND C
0.15
0.13
V IN = V OUT = 3.6V
SWITCHES A AND D
2.30
2.25
0.11
0.09
0.07
0.11
0.09
0.07
2.20
2.15
0.05
–55
–25
5 35 65
TEMPERATURE ( ° C)
95
125
0.05
–50
–25
5 35 65
TEMPERATURE ( ° C)
95
125
2.10
–55
–25
5 35 65
TEMPERATURE ( ° C)
95
125
PI FU CTIO S
3443 G15
3443 G16
3443 G17
SHDN/SS (Pin 1): Combined Soft-Start and Shutdown.
Applied voltage < 0.4V shuts down the IC. Tie to >1.4V to
enable the IC and >2.4V to ensure the error amp is not
clamped from soft-start. An RC from the shutdown com-
mand signal to this pin will provide a soft-start function by
limiting the rise time of the V C pin.
GND (Pin 2): Signal Ground for the IC.
PGND (Pins 3, 6, 13 Exposed Pad): Power Ground for the
Internal NMOS Power Switches. The exposed pad must be
soldered to PCB ground for optimal thermal performance.
SW1 (Pin 4): Switch pin where the internal switches A and
B are connected. Connect inductor from SW1 to SW2. An
optional Schottky diode can be connected from this SW1
to ground. Minimize trace length to keep EMI down.
SW2 (Pin 5): Switch pin where the internal switches C
and D are connected. An optional Schottky diode can be
connected from SW2 to V OUT (it is required where
V OUT > 4.3V). Minimize trace length to keep EMI down.
MODE/SYNC (Pin 7): Burst Mode Select and Oscillator
Synchronization.
MODE/SYNC = High: Enable Burst Mode Operation.
During the period where the IC is supplying energy to
the output, the inductor peak inductor current will reach
0.8A and return to zero current on each cycle. In Burst
Mode operation the operation is variable frequency,
which provides a significant efficiency improvement at
light loads. The Burst Mode operation will continue until
the pin is driven low.
3443fa
5
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相关代理商/技术参数 |
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| LTC3444 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller |
| LTC3444EDD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications |
| LTC3444EDD#PBF | 功能描述:IC DC/DC CONV WCDMA 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3444EDD#TRPBF | 功能描述:IC DC/DC CONV WCDMA 8-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LTC3445 | 制造商:LINER 制造商全称:Linear Technology 功能描述:I2C Controllable Buck Regulator with Two LDOs in a 4mm × 4mm QFN |
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