参数资料
型号: LTC1147CS8-5#PBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 8-SOIC
标准包装: 100
PWM 型: 电流模式
输出数: 1
占空比: 100%
电源电压: 3.5 V ~ 14 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: 0°C ~ 70°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
包装: 管件
产品目录页面: 1332 (CN2011-ZH PDF)
LTC1147-3.3
LTC1147-5/LTC1147L
PI FU CTIO S
V IN (Pin 1): Main Supply Pin. Must be closely decoupled
to ground Pin 7.
C T (Pin 2): External capacitor C T from Pin 2 to ground sets
the operating frequency. The actual frequency is also
dependent upon the input voltage.
I TH (Pin 3): Gain Amplifier Decoupling Point. The current
comparator threshold increases with the Pin 3 voltage.
SENSE – (Pin 4): Connects to internal resistive divider
which sets the output voltage. Pin 4 is also the (–) input for
the current comparator.
SENSE + (Pin 5): The (+) input to the current comparator.
A built-in offset between Pins 4 and 5 in conjunction with
R SENSE sets the current trip threshold.
SHDN/V FB (Pin 6): When grounded, the fixed output
versions of the LTC1147 family operate normally. Pulling
Pin 6 high holds the P-channel MOSFET off and puts the
LTC1147 in micropower shutdown mode. Requires CMOS
logic signal with t r , t f < 1 μ s. Do not leave this pin floating.
On the LTC1147L this pin serves as the feedback pin from
an external resistive divider used to set the output voltage.
GND (Pin 7): Two independent ground lines must be
routed separately to: 1) the (–) terminal of C OUT , and 2) the
cathode of the Schottky diode and (–) terminal of C IN .
PDRIVE (Pin 8): High current drive for the P-channel
MOSFET. Voltage swing at this pin is from V IN to ground.
FU CTIO AL DIAGRA
Pin 6 Connection Shown For LTC1147-3.3 and LTC1147-5; Changes Create LTC1147L.
SENSE +
SENSE –
1 V IN
8 PDRIVE
5
V FB
4
6
7 GND
V
SLEEP
+
Q
R
S
C
25mV TO 150mV
– +
5pF
S
V TH2
V TH1
T
I TH 3
13k
G
V OS
1.25V
100k
2
C T
OFF-TIME
CONTROL
V IN
SENSE –
SHDN 6
REFERENCE
LTC1147 ? FD
sn1147 1147fds
5
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LTC1147HVCS8-3.3 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC RoHS:否 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)
LTC1147HVCS8-3.3#PBF 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC 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:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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 ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR)
LTC1147HVCS8-3.3#TR 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC RoHS:否 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)
LTC1147HVCS8-3.3#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 8-SOIC 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:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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 ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR)
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