- 您现在的位置：买卖IC网 > PDF目录1832 > LTC3822EGN-1#PBF (Linear Technology)IC REG CTRLR BUCK PWM CM 16-SSOP PDF资料下载
参数资料
| 型号： | LTC3822EGN-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-SSOP |
| 标准包装： | 100 |
| 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： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
LTC3822-1
TYPICAL PERFORMANCE CHARACTERISTICS
Pulse Skip Mode Operation
T A = 25°C unless otherwise noted.
Burst Mode Operation
V SW
2V/DIV
V OUT
20mV/DIV
AC COUPLED
I L
2A/DIV
V SW
2V/DIV
V OUT
20mV/DIV
AC COUPLED
I L
2A/DIV
2 μ s/DIV
FIGURE 10 CIRCUIT
V IN = 3.3V
V OUT = 1.8V, 100mA
PIN FUNCTIONS
(DD/GN)
38221 G18
10 μ s/DIV
FIGURE 10 CIRCUIT
V IN = 3.3V
V OUT = 1.8V, 100mA
38221 G19
PLLLPF (Pin 1/Pin 2): This pin serves as the frequency
select input and PLL lowpass ?lter compensation point.
When SYNC/MODE has a DC voltage on it, tying this pin
to GND selects 300kHz operation; tying this pin to V IN
selects 750kHz operation. Floating this pin selects 550kHz
operation. When SYNC/MODE has a clock applied to it,
connect an R-C network from this pin to ground.
SYNC/MODE (Pin 2/Pin 3): This pin performs two func-
tions: 1) external clock synchronization input for phase-
locked loop and 2) Burst Mode, pulse skipping or forced
continuous mode select. Applying a clock with frequency
between 250kHz and 750kHz causes the internal oscilla-
tor to phase-lock to the external clock and disables Burst
Mode operation, but allows pulse skipping at low load
currents.
To select Burst Mode operation at light loads, tie this
pin to V IN . Grounding this pin selects forced continuous
operation, which allows the inductor current to reverse.
Tying this pin to a voltage greater than 0.4V and less than
1.2V selects pulse skipping mode. In these cases, the
frequency of the internal oscillator is set by the voltage
on the PLLLPF pin.
TRACK/SS (Pin 3/Pin 5): Tracking Input for the Control-
ler or Optional External Soft-Start Input. This pin allows
the start-up of V OUT to “track” the external voltage at this
pin using an external resistor divider. The LTC3822-1
regulates the V FB voltage to the smaller of 0.6V or the
voltage on the TRACK/SS pin. An internal 1μA pull-up
current source is connected to this pin. Tying this pin to
V IN allows V OUT start-up with the internal 1ms soft-start
clamp. An external soft-start can be programmed by con-
necting a capacitor between this pin and ground. Do not
leave this pin ?oating.
V FB (Pin 4/Pin 6): Feedback Pin. This pin receives the
remotely sensed feedback voltage for the controller from
an external resistor divider across the output.
I TH (Pin 5/Pin 7): Current Threshold and Error Ampli?er
Compensation 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 6/Pin 8): Run Control Input. Forcing this pin
below 1.1V shuts down the chip. Driving this pin to V IN
or releasing this pin enables the chip to start-up.
IPRG (Pin 7/Pin 10): Three-State Pin to Select the Maxi-
mum Peak Sense Voltage Threshold. This pin selects the
maximum allowed voltage drop between the V IN and SW
pins (i.e., the maximum allowed drop across the external
topside MOSFET). Tie to V IN , GND or ?oat to select 200mV,
82mV or 125mV respectively.
38221f
6
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3822EMSE#TRPBF | IC REG CTRLR BUCK PWM CM 10-MSOP |
| LTC3823IUH#PBF | IC REG CTRLR BUCK PWM CM 32-QFN |
| LTC3824EMSE#PBF | IC REG CTRLR BUCK PWM CM 10-MSOP |
| LTC3826IUH#TRPBF | IC REG CTRLR BUCK PWM CM 32-QFN |
| LTC3827IG-1#TRPBF | IC REG CTRLR BUCK PWM CM 28-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3822EMSE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 10-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) |
| LTC3822EMSE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 10-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) |
| 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) |
发布紧急采购，3分钟左右您将得到回复。