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参数资料
| 型号： | LTC3546EUFD |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 4000 kHz SWITCHING FREQ-MAX, PQCC28 |
| 封装： | 4 X 5 MM, PLASTIC, MO-220, QFN-28 |
| 文件页数： | 2/28页 |
| 文件大小： | 356K |
| 代理商： | LTC3546EUFD |
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LTC3546
10
3546fb
PIN FUNCTIONS
VFB1 (Pin 20/Pin 23): Feedback voltage from external
resistive divider from Channel 1 output. Nominal voltage
for this pin is 0.6V.
TRACK/SS1 (Pin 21/Pin 24): Tracking input for Channel 1
output or optional external soft-start input. VOUT1 will track
an external voltage at this pin. Leaving this pin oating
allows VOUT1 to start-up using the internal soft-start. An
external soft-start can be programmed by connecting a
capacitor between this pin and ground. External soft-start
ramp time must be greater than the internal soft-start time
of 1.2ms. Refer to the Applications Information section
for more details.
BMC1 (Pin 22/Pin 25): Burst Mode Clamp for Channel 1.
Connecting this pin to an external voltage between 0V and
0.6V sets the Burst Mode clamp level. If this pin is pulled
to VCCA, an internal Burst Mode clamp level is used.
PGOOD1 (Pin 23/Pin 26): Power Good Pin for the 1A
Regulator. This common drain logic output is pulled to
GND when the output voltage of Channel 1 is below –8%
of regulation.
FREQ (Pin 24/Pin 27): Frequency Set Pin. When FREQ is
at VCCA, the internal oscillator runs at 2.25MHz. When a
resistor is connected from this pin to GNDA, the internal
oscillator frequency can be varied from 0.75MHz to 4MHz.
When using external synchronization this pin compensates
the internal PLL. Typical compensation components are a
200k resistor in series with a 100pF capacitor.
GNDA (Pin 25/Pin 28): Ground Pin for Internal Analog
Circuitry.
VCCA (Pin 26/Pin 1): Supply Pin for Internal Analog Cir-
cuitry.
SYNC/MODE (Pin 27/Pin 2): Combination Mode Selec-
tion and Oscillator Synchronization Pin. This pin controls
the operation of the device. When the voltage on the
SYNC/MODE pin is > (VIN – 0.5V), Burst Mode operation
is selected for both regulators. When the voltage on the
SYNC/MODE pin is <0.5V, pulse-skipping mode is selected
for both regulators. When the SYNC/MODE pin is held at
VIN/2, forced continuous mode is selected for both regula-
tors. The oscillation frequency can be synchronized to an
external oscillator applied to this pin. When synchronized
to an external clock, pulse-skipping mode is selected.
PGOOD2 (Pin 28/Pin 3): Power Good Pin for Channel 2
This common drain logic output is pulled to GND when the
output voltage of Channel 2 is below –8% of regulation.
Exposed Pad (Pin 29/Pin 29): Digital Ground. Connect to
Electrical Ground for substrate and internal digital circuitry.
Solder to PCB for rated thermal performance.
(UFD/FE)
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相关代理商/技术参数 |
参数描述 |
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| LTC3546EUFD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1A/2A 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
| LTC3546EUFD#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 1A/2A 28QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3546EUFDPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator |
| LTC3546EUFDTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator |
| LTC3546IFE#PBF | 功能描述:IC REG BUCK SYNC ADJ DL 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
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