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参数资料
| 型号： | LTC3822EMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-MSOP |
| 标准包装： | 50 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 850kHz |
| 占空比： | 99% |
| 电源电压： | 2.75 V ~ 4.5 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 ~ 85°C |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
LTC3822
PIN FUNCTIONS
BG (Pin 1): Bottom Gate Driver Output. This pin drives
the gate of the external bottom MOSFET. This pin has an
output swing from GND to BOOST.
TG (Pin 2): Top Gate Driver Output. This pin drives the gate
of the external topside MOSFET. This pin has an output
swing from GND to BOOST.
BOOST (Pin 3): Positive Supply Pin for the Gate Driver
Circuitry. A bootstrapped capacitor, charged through an
external Schottky diode from V IN , is connected between
the BOOST and SW pins. Voltage swing at the BOOST pin
is from V IN to 2V IN . Alternatively, the diode can be connected
to SW and a separate 5V supply to provide 5V gate drive.
In this case, the BOOST pin swings from 5V to 5V + V IN .
V IN (Pin 4): This pin powers the control circuitry and serves
as the positive input to the differential current comparator.
Pin 4 must not be locally decoupled with a capacitor as it
is also the positive terminal for current sense.
SW (Pin 5): Switch Node Connection to Inductor. This pin
is also the negative input to the differential current com-
parator and an input to the reverse current comparator.
Normally this pin is connected to the source of the external
top-side MOSFET, the drain of the external bottom-side
MOSFET, and the inductor.
FREQ (Pin 6): This pin serves as the frequency select
input. Tying this pin to GND selects 300kHz operation;
tying this pin to V IN selects 750kHz operation. Floating this
pin selects 550kHz operation.
IPRG (Pin 7): Selects maximum peak sense voltage be-
tween the V IN and SW pins (i.e., the maximum allowed drop
across the external top-side MOSFET). Tie to V IN , GND or
?oat to select 200mV, 82mV or 120mV respectively.
V FB (Pin 8): Feedback Pin. This pin receives the remotely
sensed feedback voltage from an external resistor divider
across the output.
I TH (Pin 9): Current Threshold and Error Ampli?er Com-
pensation Point. Nominal operating range on this pin is
from 0.7V to 2V. The voltage on this pin determines the
threshold of the main current comparator.
RUN (Pin 10): Run Control Input. Forcing this pin below
1.1V shuts down the chip. Driving this pin to V IN or releas-
ing this pin enables the chip to start-up with the internal
soft-start.
GND (Pin 11): Exposed Pad. The exposed pad is ground
and must be soldered to the PCB ground for electrical
contact and optimal thermal performance.
3822fa
6
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相关代理商/技术参数 |
参数描述 |
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| LTC3823EGN#PBF | 功能描述:IC REG CTRLR BUCK 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) |
| LTC3823EGN#TRPBF | 功能描述:IC REG CTRLR BUCK 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) |
| LTC3823EUH#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 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:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC3823EUH#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 32-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) |
| LTC3823IGN#PBF | 功能描述:IC REG CTRLR BUCK 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 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:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
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