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参数资料
| 型号： | LT3958EUHE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 36VQFN |
| 特色产品： | LT?3957/LT?3958 Converters |
| 标准包装： | 61 |
| 类型： | 升压（升压），反相，回扫，Sepic |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.6 V ~ 80 V |
| 输入电压： | 5 V ~ 80 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz ~ 1MHz |
| 电流 - 输出： | 3.3A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 36-QFN-EP（6x5） |
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LT3958
High Input Voltage,
Boost, Flyback, SEPIC and
Inverting Converter
FEATURES
DESCRIPTION
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Wide Input Voltage Range: 5V to 80V
Single Feedback Pin for Positive or Negative
Output Voltage
Internal 3.3A/84V Power Switch
Current Mode Control Provides Excellent Transient
Response
Programmable Operating Frequency (100kHz to
1MHz) with One External Resistor
Synchronizeable to an External Clock
Low Shutdown Current < 1μA
Internal 7.2V Low Dropout Voltage Regulator
Programmable Input Undervoltage Lockout with
Hysteresis
Programmable Soft-Start
Thermally Enhanced QFN (5mm × 6mm) Package
The LT ? 3958 is a wide input range, current mode, DC/DC
converter which is capable of generating either positive
or negative output voltages. It can be con?gured as either
a boost, ?yback, SEPIC or inverting converter. It features
an internal low side N-channel power MOSFET rated for
84V at 3.3A and driven from an internal regulated 7.2V
supply. The ?xed frequency, current-mode architecture
results in stable operation over a wide range of supply
and output voltages.
The operating frequency of LT3958 can be set with an
external resistor over a 100kHz to 1MHz range, and can
be synchronized to an external clock using the SYNC pin.
A minimum operating supply voltage of 5V, and a low
shutdown quiescent current of less than 1μA, make the
LT3958 ideally suited for battery-powered systems.
APPLICATIONS
The LT3958 features soft-start and frequency foldback
functions to limit inductor current during start-up.
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Automotive
Telecom
Industrial
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No R SENSE and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Patents pending.
TYPICAL APPLICATION
High Ef?ciency Boost Converter
Ef?ciency vs Output Current
V IN
12V TO 40V
4.7μF
392k
V IN
33μH
SW
4.7μF
2
V OUT
48V
0.5A
100
95
V IN = 24V
53.6k
EN/UVLO
SGND
LT3958
GND
SENSE1
90
85
SYNC
SENSE2
464k
80
FBX
RT
SS
VC
INTV CC
15.8k
75
41.2k
300kHz
0.33μF
10k
4.7μF
70
0
100 200 300
400
500
10nF
3958 TA01a
OUTPUT CURRENT (mA)
3958 TA01b
3958f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3958EUHETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter |
| LT3958IUHE#PBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3958IUHE#TRPBF | 功能描述:IC REG MULTI CONFIG ADJ 36VQFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3958IUHEPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter |
| LT3958IUHETRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Input Voltage, Boost, Flyback, SEPIC and Inverting Converter |
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