- 您现在的位置：买卖IC网 > PDF目录15296 > LTC3838EUHF#TRPBF (Linear Technology)IC REG CTRLR BUCK PWM CM 38-QFN PDF资料下载
参数资料
| 型号： | LTC3838EUHF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/54页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 38-QFN |
| 标准包装： | 2,500 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 2MHz |
| 电源电压： | 4.5 V ~ 38 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： | -40°C ~ 125°C |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页
LTC3838
PIN FUNCTIONS
(QFN/TSSOP)
PHASMD (Pin 4/Pin 8): Phase Selector Input. This pin
determines the relative phases of channels and the
CLKOUT signal. With zero phase being defined as the
rising edge of TG1: Pulling this pin to SGND locks TG2 to
180°, and CLKOUT to 60°. Connecting this pin to INTV CC
locks TG2 to 240° and CLKOUT to 120°. Floating this pin
locks TG2 to 180° and CLKOUT to 90°.
MODE/PLLIN (Pin 5/Pin 9): Operation Mode Selection
or External Clock Synchronization Input. When this pin
is tied to INTV CC , forced continuous mode operation is
selected. Tying this pin to SGND allows discontinuous
mode operation. When an external clock is applied at this
pin, both channels operate in forced continuous mode and
synchronize to the external clock.
CLKOUT (Pin 6/Pin 10): Clock Output of Internal Clock
Generator. Its output level swings between INTV CC and
SGND. If clock input is present at the MODE/PLLIN pin, it
will be synchronized to the input clock, with phase set by
the PHASMD pin. If no clock is present at MODE/PLLIN, its
frequency will be set by the RT pin. To synchronize other
controllers, it can be connected to their MODE/PLLIN pins.
SGND (Pin 7/Pin 11): Signal Ground. All small-signal analog
and compensation components should be connected to
this ground. Connect SGND to the exposed pad and PGND
pin using a single PCB trace.
RT (Pin 8/Pin 12): Clock Generator Frequency Program-
ming Pin. Connect an external resistor from RT to SGND
to program the switching frequency between 200kHz and
2MHz. An external clock applied to MODE/PLLIN should
be within ±30% of this programmed frequency to ensure
frequency lock. When the RT pin is floating, the frequency
is internally set to be slightly under 200kHz.
V RNG1 , V RNG2 (Pins 9, 3/Pins 13, 7): Current Sense Volt-
age Range Inputs. When programmed between 0.6V and
2V, the voltage applied to V RNG1,2 is twenty times (20 × )
the maximum sense voltage between SENSE1,2 + and
SENSE1,2 – , i.e., for either channel, (V SENSE+ – V SENSE– ) =
0.05 ? V RNG . If a V RNG is tied to SGND, the channel oper-
ates with a maximum sense voltage of 30mV, equivalent
to a V RNG of 0.6V; If tied to INTV CC , a maximum sense
voltage of 50mV, equivalent to a V RNG of 1V.
ITH1, ITH2 (Pins 10, 2/Pins 14, 6): Current Control
Threshold. This pin is the output of the error amplifier and
the switching regulator’s compensation point. The current
comparator threshold increases with this control voltage.
The voltage ranges from 0V to 2.4V, with 0.8V correspond-
ing to zero sense voltage (zero inductor valley current).
TRACK/SS1, TRACK/SS2 (Pins 11, 1/Pins 15, 5): External
Tracking and Soft-Start Input. The LTC3838 regulates the
feedback voltages (V OUTSENSE1+ – V OUTSENSE1– ) and V FB2
to the smaller of 0.6V or the voltage on the TRACK/SS1,2
pins respectively. An internal 1μA temperature-independent
pull-up current source is connected to each TRACK/SS
pin. A capacitor to ground at this pin sets the ramp time
to the final regulated output voltage. Alternatively, another
voltage supply connected to this pin allows the output to
track the other supply during start-up.
V OUTSENSE1+ (Pin 12/Pin 16): Differential Output Sense
Amplifier (+) Input of Channel 1. Connect this pin to a
feedback resistor divider between the positive and negative
output capacitor terminals of V OUT1 . In nominal operation
the LTC3838 will attempt to regulate the differential output
voltage V OUT1 to 0.6V divided by the feedback resistor
divider ratio.
3838fa
10
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3856EUH#TRPBF | IC REG CTRLR BUCK PWM CM 38-QFN |
| SXR222M010ST | CAP ALUM 2200UF 10V 20% RADIAL |
| LTC3855EUJ#TRPBF | IC REG CTRLR BUCK PWM CM 40-QFN |
| UCY2C121MHD | CAP ALUM 120UF 160V 20% RADIAL |
| LT1950IGN | IC REG CTRLR PWM CM 16-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3838IFE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 38TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3838IFE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 38TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC3838IUHF#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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) |
| LTC3838IUHF#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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) |
| LTC3838IUHF-1#PBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM CM 38QFN 制造商:Linear Technology 功能描述:BUCK DUAL CNTRL 4.5-38V 2MHZ 38QFN 制造商:Linear Technology 功能描述:BUCK, DUAL, CNTRL, 4.5-38V, 2MHZ, 38QFN 制造商:Linear Technology 功能描述:DP-SWREG/Controller, Dual, Fast, Accurate Step-Down Controller with Differential 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, DUAL, BUCK, ADJ, QFN-38, Primary Input Voltage:38V, No. of Outputs:2, Output Current:25A, No. of Pins:38, Operating Temperature Min:-40C, Operating Temperature Max:125C, MSL:MSL 1 - Unlimited , RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。