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参数资料
| 型号： | LT3758MPMSE#TRA1PBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/36页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 10-MSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 电源电压： | 5.5 V ~ 100 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -55°C ~ 150°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
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LT3758/LT3758A
PIN FUNCTIONS
V C (Pin 1): Error Amplifier Compensation Pin. Used to
stabilize the voltage loop with an external RC network.
FBX (Pin 2): Positive and Negative Feedback Pin. Re-
ceives the feedback voltage from the external resistor
divider across the output. Also modulates the switching
frequency during start-up and fault conditions when FBX
is close to GND.
SS (Pin 3): Soft-Start Pin. This pin modulates compensation
pin voltage (V C ) clamp. The soft-start interval is set with
an external capacitor. The pin has a 10μA (typical) pull-up
current source to an internal 2.5V rail. The soft-start pin
is reset to GND by an undervoltage condition at SHDN /
UVLO, an INTV CC undervoltage or overvoltage condition
or an internal thermal lockout.
RT (Pin 4): Switching Frequency Adjustment Pin. Set the
frequency using a resistor to GND. Do not leave this pin
open.
SYNC (Pin 5): Frequency Synchronization Pin. Used to
synchronize the switching frequency to an outside clock.
If this feature is used, an R T resistor should be chosen to
program a switching frequency 20% slower than the SYNC
pulse frequency. Tie the SYNC pin to GND if this feature is
not used. SYNC is bypassed when FBX is close to GND.
SENSE (Pin 6): The Current Sense Input for the Control
Loop. Kelvin connect this pin to the positive terminal of
the switch current sense resistor in the source of the NFET.
The negative terminal of the current sense resistor should
be connected to GND plane close to the IC.
GATE (Pin 7): N-Channel MOSFET Gate Driver Output.
Switches between INTV CC and GND. Driven to GND when
IC is shut down, during thermal lockout or when INTV CC
is above or below the overvoltage or UV thresholds,
respectively.
INTV CC (Pin 8): Regulated Supply for Internal Loads and
Gate Driver. Supplied from V IN and regulated to 7.2V (typi-
cal). INTV CC must be bypassed with a minimum of 4.7μF
capacitor placed close to pin. INTV CC can be connected
directly to V IN , if V IN is less than 17.5V. INTV CC can also
be connected to a power supply whose voltage is higher
than 7.5V, and lower than V IN , provided that supply does
not exceed 17.5V.
SHDN /UVLO (Pin 9): Shutdown and Undervoltage Detect
Pin. An accurate 1.22V (nominal) falling threshold with
externally programmable hysteresis detects when power
is okay to enable switching. Rising hysteresis is generated
by the external resistor divider and an accurate internal
2μA pull-down current. An undervoltage condition resets
sort-start. Tie to 0.4V, or less, to disable the device and
reduce V IN quiescent current below 1μA.
V IN (Pin 10): Input Supply Pin. Must be locally bypassed
with a 0.22μF, or larger, capacitor placed close to the pin.
Exposed Pad (Pin 11): Ground. This pin also serves as the
negative terminal of the current sense resistor. The exposed
pad must be soldered directly to the local ground plane.
3758afd
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3759 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Wide Input Voltage Range |
| LT3759EMSE#PBF | 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LT3759EMSE#TRPBF | 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3759HMSE#PBF | 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3759HMSE#TRPBF | 功能描述:IC REG CTRLR BST INV PWM 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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