参数资料
型号: LTC3786EUD#PBF
厂商: Linear Technology
文件页数: 8/34页
文件大小: 0K
描述: IC REG CTRLR BST PWM CM 16-QFN
标准包装: 121
PWM 型: 电流模式
输出数: 1
频率 - 最大: 850kHz
占空比: 100%
电源电压: 4.5 V ~ 38 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 125°C
封装/外壳: 16-WFQFN 裸露焊盘
包装: 管件
LTC3786
TYPICAL PERFORMANCE CHARACTERISTICS
Charge Pump Charging Current
vs Operating Frequency
Charge Pump Charging Current
vs Switch Voltage
110
V BOOST = 16.5V
100 V SW = 12V
90
80
70
60
50
40
30
20
–45°C
25°C
130°C
120
100
80
60
40
20
FREQ = 0V
FREQ = INTV CC
10
0
50
150 250 350 450 550 650 750
0
5
10
15
20 25 30
35
40
OPERATING FREQUENCY (kHz)
3786 G27
SWITCH VOLTAGE (V)
3786 G28
PIN FUNCTIONS
(MSOP/QFN)
VFB (Pin 1/Pin 3): Error Amplifier Feedback Input. This
pin receives the remotely sensed feedback voltage from
an external resistive divider connected across the output.
SENSE + (Pin 2/Pin 4): Positive Current Sense Comparator
Input. The (+) input to the current comparator is normally
connected to the positive terminal of a current sense resis-
tor. The current sense resistor is normally placed at the
input of the boost controller in series with the inductor.
This pin also supplies power to the current comparator.
SENSE – (Pin 3/Pin 5): Negative Current Sense Comparator
Input. The (–) input to the current comparator is normally
connected to the negative terminal of a current sense re-
sistor connected in series with the inductor. The common
mode voltage range on the SENSE + and SENSE – pins is
2.5V to 38V (40V abs max).
ITH (Pin 4/Pin 6): Current Control Threshold and Error
Amplifier Compensation Point. The voltage on this pin
sets the current trip threshold.
SS (Pin 5/Pin 7): Output Soft-Start Input. A capacitor to
ground at this pin sets the ramp rate of the output voltage
during start-up.
PLLIN/MODE (Pin 6/Pin 9): External Synchronization Input
to Phase Detector and Forced Continuous Mode Input.
When an external clock is applied to this pin, it will force
the controller into forced continuous mode of operation
and the phase-locked loop will force the rising BG signal
to be synchronized with the rising edge of the external
clock. When not synchronizing to an external clock, this
input determines how the LTC3786 operates at light loads.
Pulling this pin to ground selects Burst Mode operation.
An internal 100k resistor to ground also invokes Burst
Mode operation when the pin is floated. Tying this pin
to INTV CC forces continuous inductor current operation.
Tying this pin to a voltage greater than 1.2V and less than
INTV CC – 1.3V selects pulse-skipping operation. This can
be done by adding a 100k resistor between the PLLIN/
MODE pin and INTV CC .
3786fa
8
相关PDF资料
PDF描述
LTC3787EUFD#PBF IC REG CTRLR BST PWM CM 28-QFN
LTC3788IUH#TRPBF IC REG CTRLR BST PWM CM 32-QFN
LTC3789EGN#PBF IC REG CTRLR BST PWM CM 28-SSOP
LTC3801BES6#TRM IC REG CTRLR BUCK PWM TSOT23-6
LTC3802EGN IC REG CTRLR BUCK PWM VM 28-SSOP
相关代理商/技术参数
参数描述
LTC3786IMSE#PBF 功能描述:IC REG CTRLR BST PWM CM 16-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)
LTC3786IMSE#TRPBF 功能描述:IC REG CTRLR BST PWM CM 16-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)
LTC3786IUD#PBF 功能描述:IC REG CTRLR BST PWM CM 16-QFN 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)
LTC3786IUD#TRPBF 功能描述:IC REG CTRLR BST PWM CM 16-QFN 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)
LTC3787EGN#PBF 功能描述:IC REG CTRLR BST PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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