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参数资料
| 型号： | LTC3443EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16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
PI FU CTIO S
MODE/SYNC = Low: Disable Burst Mode operation and
maintain low noise, constant frequency operation .
MODE/SYNC = External CLK : Synchronization of the
internal oscillator and Burst Mode operation disable. A
clock pulse width between 100ns and 2 μ s and a clock
frequency between 1.38MHz and 2.4MHz (twice the
desired frequency) is required to synchronize the IC.
f OSC = f SYNC /2
V OUT (Pin 8): Output of the Synchronous Rectifier. A filter
capacitor is placed from V OUT to GND. A ceramic bypass
capacitor is recommended as close to the V OUT and GND
pins as possible.
BLOCK DIAGRA
PV IN (Pin 9): Power V IN Supply Pin. A 10 μ F ceramic capaci-
tor is recommended as close to the PV IN and PGND pins
as possible
V IN (Pin 10): Input Supply Pin. Internal V CC for the IC.
V C (Pin 11): Error Amp Output. A frequency compensation
network is connected from this pin to the FB pin to
compensate the loop. See the section “Compensating the
Feedback Loop” for guidelines.
FB (Pin 12): Feedback Pin. Connect resistor divider tap
here. The output voltage can be adjusted from 2.4V to
5.25V. The feedback reference voltage is typically 1.22V.
V IN
2.4V TO 5.5V
9
PV IN
SW A
SW1
4
5
SW2
SW D
V OUT
8
V OUT
2.4V TO 5.25V
+
10
V IN
SW B
GATE
DRIVERS
AND
ANTICROSS
SW C
–0.4A
CONDUCTION
+
I SENSE
AMP
REVERSE
CURRENT
LIMIT
g m = 1 k
100
PGND
3.2A
–
AVERAGE
CURRENT LIMIT
+
SUPPLY
CURRENT
LIMIT
THERMAL
SHUTDOWN
CLAMP
MODE
ERROR
AMP
+
1.22V
4A
V CC
INTERNAL
–
+
UVLO
PWM
LOGIC
AND
OUTPUT
PHASING
PWM
COMPARATORS
CLAMP
–
FB
12
R1
2.4V
–
600kHz
OSC
SYNC
SLEEP
Burst Mode
OPERATION
V C
11
R2
÷ 2
CONTROL
SHUTDOWN
SHDN/SS
1
R SS
V IN
5 μ s DELAY
7
MODE/SYNC
C SS
1 = Burst Mode
OPERATION
2
GND
6
PGND
0 = FIXED FREQUENCY
3443 BD
3443fa
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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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