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参数资料
| 型号： | LTC3569IUD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ TRPL 20QFN |
| 标准包装： | 91 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 0.43 V ~ 5.5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz，1MHz ~ 3MHz |
| 电流 - 输出： | 600mA，1.2A |
| 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： | 20-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-QFN 裸露焊盘（3x3） |
LTC3569
PIN FUNCTIONS
EN1: Enable Pin for Buck 1. Toggle up to 15 times to
program reference feedback level from 800mV down to
425mV.
EN2: Enable Pin for Buck 2. Toggle up to 15 times to
program reference feedback level from 800mV down to
425mV.
EN3: Enable Pin for Buck 3. Toggle up to 15 times to
program reference feedback level from 800mV down to
425mV.
FB1: Receives the feedback voltage from the external
resistive divider across the output of Buck 1. Nominal
voltage for this pin is programmed with the EN1 pin from
800mV down to 425mV.
FB2: Receives the feedback voltage from the external
resistive divider across the output of Buck 2. Nominal
voltage for this pin is programmed with the EN2 pin from
800mV down to 425mV. When pulled to SV IN , Buck 2 is
put into slave mode, following Buck 1.
FB3: Receives the feedback voltage from the external
resistive divider across the output of Buck 3. Nominal
voltage for this pin is programmed with the EN3 pin from
800mV down to 425mV. When pulled to SV IN , Buck 3 is
put into slave mode, following Buck 2.
GND (Exposed Pad): The exposed pad must be connected
to PCB ground for rated thermal performance and for
electrical connection in the TSSOP package.
MODE: Combination Mode Selection and Oscillator Syn-
chronization Pin. This pin controls the operating mode
of the device. When tied to SV IN , Burst Mode operation
is selected. When tied to SGND, pulse-skipping mode is
selected. The internal clock frequency synchronizes to an
external oscillator applied to this pin. When synchronizing
to an external clock, drive this pin with a logic-level signal
with high and low pulse widths of at least 100ns. When
synchronizing to an external clock, pulse-skipping mode
is automatically selected.
PGND1: Main Power Ground Pin for Buck 1. Connect to
the (–) terminal of the output capacitor for Buck1, and (–)
terminal of C IN1 . Decoupling capacitors should be summed
where power supply pins are shared.
PGND2: Main Power Ground Pin for Buck 2. Connect to
the (–) terminal of the output capacitor for Buck2, and (–)
terminal of C IN2 . Decoupling capacitors should be summed
where power supply pins are shared.
PGND3: Main Power Ground Pin for Buck 3. Connect to
the (–) terminal of the output capacitor for Buck3, and (–)
terminal of C IN3 . Decoupling capacitors should be summed
where power supply pins are shared.
PGOOD: The Power Good Pin. This open-drain output is
released when an enabled output has risen to within 8% of
the regulation voltage. When multiple outputs are enabled,
PGOOD is the logical AND of each internal PGOOD.
PV IN1 : Main Supply Pin for Buck 1. Decouple to PGND1
with a low ESR 4.7μF capacitor, C IN1 . Decoupling ca-
pacitors should be summed where power supply pins
are shared.
PV IN2 : Main Supply Pin for Buck 2. Decouple to PGND2
with a low ESR 4.7μF capacitor, C IN2 . Decoupling ca-
pacitors should be summed where power supply pins
are shared.
PV IN3 : Main Supply Pin for Buck 3. Decouple to PGND3
with a low ESR 4.7μF capacitor, C IN3 . Decoupling ca-
pacitors should be summed where power supply pins
are shared.
R T : Timing Resistor Pin. The free-running oscillator
frequency is programmed by connecting a resistor from
this pin to ground. Tie to SV IN to get a fixed 2.25MHz
operating frequency.
SGND: Main Ground Pin. Decouple to SV IN .
SV IN : Main Supply Pin. Decouple to SGND with a low ESR
1μF capacitor.
SW1: Buck 1 Switch. Connect to the Inductor for Buck 1.
This pin swings from PV IN1 to PGND1.
SW2: Buck 2 Switch. Connect to the Inductor for Buck 2.
This pin swings from PV IN2 to PGND2.
SW3: Buck 3 Switch. Connect to the Inductor for Buck 3.
This pin swings from PV IN3 to PGND3.
3569fd
8
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3569IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References |
| LTC3576 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Switching Power Manager with USB On-the-Go + Triple Step-Down DC/DCs |
| LTC3576-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Overvoltage/Overcurrent Protection Controller |
| LTC3576EUFE#PBF | 功能描述:IC POWER MANAGER W/USB OTG 38QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC3576EUFE#TRPBF | 功能描述:IC POWER MANAGER W/USB OTG 38QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
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