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参数资料
| 型号： | LTC3523EUD-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST SYNC ADJ 16QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.62 V ~ 5.5 V |
| 输入电压： | 1.8 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.4MHz |
| 电流 - 输出： | 400mA，600mA |
| 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： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LTC3523/LTC3523-2
PIN FUNCTIONS
SW1 (Pin 5): Step-Up Converter Switch Pin. Connect the
inductor between SW1 and V IN1 . Keep these PCB trace
lengths as short and wide as possible to reduce EMI and
voltage overshoot. If the inductor current falls to zero or
SHDN1 is low, an internal 150Ω anti-ringing resistor is
connected from SW1 to V IN1 to minimize EMI.
GND1 (Pin 6): Step-Up Converter Power Ground. Connect
this pin to the ground plane.
GND2 (Pin 7): Step-Down Converter Power Ground. Con-
nect this pin to the ground plane.
SW2 (Pin 8): Step-Down Converter Switch Pin. Connect
one end of the inductor to SW2. Keep these PCB trace
lengths as short and wide as possible to reduce EMI and
voltage overshoot.
V IN2 (Pin 9): Step-Down Converter Power Voltage Input.
This pin can be connected to a different supply than V IN1 .
This pin must be connected to a valid supply voltage.
MODE (Pin 10): Step-Up and Step-Down Converter Mode
Selection Pin. Do not leave this pin ?oating.
? MODE = Low: PWM mode
? MODE = High: Automatic Burst Mode operation
PGOOD2 (Pin 11): Step-Down Converter Power Good
Comparator Output. This open-drain output is pulled low
when V FB2 < –9% of its regulation voltage.
FB2 (Pin 12): Step-Down Converter Feedback Input to the
Error ampli?er. Connect resistor divider tap to this pin. The
output voltage can be adjusted from 0.6V to 5.5V by:
If large feedback resistors, above 500k are used, then it
will be necessary to use a lead capacitor connected to the
output voltage and FB2.
SHDN2 (Pin 13): Step-Down Converter Logic Controlled
Shutdown Input. Do not leave this pin ?oating.
? SHDN2 = High: Normal free-running operation,
1.2MHz/2.4MHz typical operating frequency.
? SHDN2 = Low: Shutdown, quiescent current < 1μA.
This pin cannot exceed the voltage on V IN2 .
GND3 (Pin 14): Analog Ground. The feedback voltage
dividers for each converter must be returned to GND3
for best performance.
Note: When laying out your PCB provide a short direct
path between GND1 and the (–) side of the step-up output
capacitor(s) and GND2 and the step-down output capaci-
tor.These pins are not connected together internally.
V BAT (Pin 15): Analog Voltage Input. Connect this pin to
the higher of V IN1 or V IN2 .
SHDN1 (Pin 16): Step-Up Converter Logic Controlled
Shutdown Input.
? SHDN1 = High: Normal free-running operation,
1.2MHz/2.4MHz typical operating frequency.
? SHDN1 = Low: Shutdown, quiescent current < 1μA.
This pin cannot exceed the voltage on V IN1 .
Exposed Pad (Pin 17): Die attach pad must be soldered
to PCB ground for electrical contact and optimum thermal
V OUT(STEP-DOWN) = 0 . 6 V ? ? 1 +
?
?
R 3 ?
R 4 ? ?
performance.
See Block Diagram.
3523fb
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3523EUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters |
| LTC3523EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters |
| LTC3524 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable TFT Bias Supply with WLED Driver |
| LTC3524EUF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Adjustable TFT Bias Supply with WLED Driver |
| LTC3524EUF#PBF | 功能描述:IC TFT BIAS SUPPLY ADJ 24-QFN 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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