参数资料
型号: LTC3812IFE-5#TRPBF
厂商: Linear Technology
文件页数: 8/34页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 16TSSOP
标准包装: 2,500
PWM 型: 电流模式
输出数: 1
频率 - 最大: 1MHz
占空比: 93%
电源电压: 6.2 V ~ 60 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-TSSOP(0.173",4.40mm)裸露焊盘
包装: 带卷 (TR)
LTC3812-5
TYPICAL PERFORMANCE CHARACTERISTICS
RUN/SS Pull-Up Current
vs Temperature
Shutdown Threshold
vs Temperature
3
2
RUN/SS = 0V
2.2
2.0
1.8
1.6
1.4
1.2
1
1.0
0.8
0
–50 –25
0
25
50
75
100
125
0.6
–50 –25
0
25
50
75
100
125
TEMPERATURE ( ° C)
38125 G27
PIN FUNCTIONS
I ON (Pin 1): On-Time Current Input. Tie a resistor from V IN
to this pin to set the one-shot timer current and thereby
set the switching frequency.
V RNG (Pin 2): Sense Voltage Limit Set. The voltage at this
pin sets the nominal sense voltage at maximum output
current and can be set from 0.5V to 2V by a resistive
divider from INTV CC . The nominal sense voltage defaults
to 95mV when this pin is tied to ground, and 215mV when
tied to INTV CC .
PGOOD (Pin 3): Power Good Output. Open-drain logic
output that is pulled to ground when the output voltage
is not between ±10% of the regulation point. The output
voltage must be out of regulation for at least 120μs before
the power good output is pulled to ground.
FCB (Pin 4): Pulse-Skipping Mode Enable Pin. This pin
provides pulse-skipping mode enable/disable control.
Pulling this pin below 0.8V disables pulse-skipping mode
operation and forces continuous operation. Pulling this pin
above 0.8V enables pulse-skipping mode operation. This
pin can also be connected to a feedback resistor divider
from a secondary winding on the inductor to regulate a
TEMPERATURE ( ° C)
38125 G28
I TH (Pin 5): Error Ampli?er Compensation Point and Cur-
rent Control Threshold. The current comparator threshold
increases with control voltage. The voltage ranges from
0V to 2.6V with 1.2V corresponding to zero sense voltage
(zero current).
V FB (Pin 6): Feedback Input. Connect V FB through a resistor
divider network to V OUT to set the output voltage.
RUN/SS (Pin 7): RUN/Soft-Start Input. For soft-start, a
capacitor to ground at this pin sets the ramp rate of the
output voltage (approximately 0.6s/μF). Pulling this pin
below 1.5V will shut down the LTC3812-5, turn off both of
the external MOSFET switches and reduce the quiescent
supply current to 224μA.
SGND (Pin 8): Signal Ground. All small-signal components
should connect to this ground and eventually connect to
PGND at one point.
NDRV (Pin 9): Drive Output for External Pass Device of
the Linear Regulator for INTV CC . Connect to the gate of
an external NMOS pass device and a pull-up resistor to
the input voltage V IN .
second output voltage.
38125fc
8
相关PDF资料
PDF描述
LTC3806EDE#PBF IC REG CTRLR FLYBACK PWM 12-DFN
LTC1266CS#TRPBF IC REG CTRLR BST PWM CM 16-SOIC
VE-JWD-EY-F3 CONVERTER MOD DC/DC 85V 50W
LTC1266CS#TR IC REG CTRLR BST PWM CM 16-SOIC
LTC1266CS-3.3#TRPBF IC REG CTRLR BST PWM CM 16-SOIC
相关代理商/技术参数
参数描述
LTC3813EG#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:- 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
LTC3813EG#TRPBF 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:- 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)
LTC3813IG#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:- 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
LTC3813IG#TRPBF 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:- 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
LTC3814EFE-5#PBF 功能描述:IC REG CTRLR BST PWM CM 16-TSSOP 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