- 您现在的位置：买卖IC网 > PDF目录1829 > LTC3422EDD#TRPBF (Linear Technology)IC REG BOOST SYNC ADJ 1.5A 10DFN PDF资料下载
参数资料
| 型号： | LTC3422EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 1.5A 10DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.25 V ~ 5.25 V |
| 输入电压： | 0.5 V ~ 4.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 100kHz ~ 3MHz |
| 电流 - 输出： | 1.5A |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3422
PI FU CTIO S
SW (Pin 1): Switch Pin for the Inductor Connection.
Minimize trace length between SW and inductor. For
discontinuous inductor current, a controlled impedance is
internally connected from SW to V IN to eliminate high
frequency ringing, reducing EMI radiation.
V IN (Pin 2): Input Supply Voltage. Connect V IN to the input
supply and decouple with a 4.7 μ F or larger ceramic
capacitor as close to V IN as possible.
BURST (Pin 3): Burst Mode Threshold Adjust. Automatic
Burst Mode Operation: A resistor/capacitor combination
The nominal soft-start charging current is 2.4 μ A. The active
range of SS is from 0.8V to 1.6V.
SHDN (Pin 5): Shutdown Input. Less than 250mV on SHDN
shuts down the LTC3422. Placing 1V or more on SHDN enables
the LTC3422. Once V OUT exceeds 2.2V, hysteresis is applied
to this pin (500nA exits the pin) allowing it to operate at a logic
high while the battery can drop to 500mV.
FB (Pin 6): Feedback Input to Error Amplifier. Connect the V OUT
to ground resistor divider tap here. The output voltage can be
adjusted from 2.25V to 5.25V according to the formula:
from BURST to ground programs the average load current
at which automatic Burst Mode operation is exited, ac-
cording to the formula:
V OUT = 1 . 216 ?
R1 + R2
R 2
R B =
12
I EXITBURST
V C (Pin 7): Error Amp Output. A frequency compensation
network is connected from V C to ground to compensate the
loop. See the section “Closing the Feedback Loop” for guide-
C B ≥ OUT OUT
f OSC =
where R B is in k? and I EXITBURST is in amps
C ? V
64 , 000
where C B(MIN) and C OUT are in μF.
Please refer to the Burst Mode Output Current Threshold
vs R BURST Typical Performance Chacteristic curves.
Note that during Burst Mode operation the peak inductor
current will be approximately 600mA and return to zero on each
cycle. In Burst Mode operation the frequency is variable,
providing a significant efficiency improvement at light loads.
The LTC3422 only allows Burst Mode operation to be entered
once V OUT exceeds approximately 2.2V.
Manually Implementing Burst Mode Operation: Ground
BURST to force Burst Mode operation or connect it to V OUT to
force fixed frequency PWM mode. Note that BURST must not
be pulled higher than V OUT .
lines.
R T (Pin 8): Frequency Adjust Input. Connect a resistor to ground
to program the oscillator frequency according to the formula:
28
R T
where f OSC is in MHz and R T is in k ? .
SYNC (Pin 9): Oscillator Synchronization Input. A clock pulse
width of 100ns to 2 μ s is required to synchronize the internal
oscillator. If not used, SYNC should be grounded.
V OUT (Pin 10): Output of the synchronous rectifier and
bootstrapped power source for the LTC3422. A ceramic capaci-
tor of at least 10 μ F is required and should be located as close to
V OUT and the power ground plane as possible.
Exposed Pad (Pin 11): Signal and Power Ground for the
LTC3422. This pin MUST be soldered to the PCB ground plane
for electrical contact and rated thermal performance.
SS (Pin 4): Soft-Start. Connect a capacitor from SS to ground to
set the soft-start time according to the formula:
t(ms) = C SS ( μ F) ? 320
3422fa
6
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3424EMS#TR | IC REG BOOST SYNC ADJ 2A 10MSOP |
| LTC3425EUH#TRPBF | IC REG BOOST SYNC ADJ 5A 32QFN |
| LTC3426ES6#TRPBF | IC REG BOOST ADJ 2A TSOT23-6 |
| LTC3427EDC#TRPBF | IC REG BOOST SYNC ADJ 0.5A 6DFN |
| LTC3428EDD#TRPBF | IC REG BOOST ADJ 4A 10DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3423 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:Low Output Voltage 3MHz Micropower Synchronous Boost Converters |
| LTC3423EMS | 功能描述:IC REG BOOST SYNC ADJ 1A 10MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| LTC3423EMS#PBF | 功能描述:IC REG BOOST SYNC ADJ 1A 10MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| LTC3423EMS#TR | 功能描述:IC REG BOOST SYNC ADJ 1A 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 |
| LTC3423EMS#TRPBF | 功能描述:IC REG BOOST SYNC ADJ 1A 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: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 |
发布紧急采购，3分钟左右您将得到回复。