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参数资料
| 型号： | LT3487EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INV ADJ 10DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 28 V |
| 输入电压： | 2.3 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3487
PI FU CTIO S
CAP (Pin 1): Disconnect-PNP Emitter and Positive Schottky
Cathode. Acts as an intermediate positive (boost) output.
Connect boost output capacitor to this pin.
SWP (Pin 2): Switch Pin and Schottky Anode for Positive
Channel. Connect boost inductor to this pin.
V BAT (Pin 3): Battery Voltage. Connect this pin to the sup-
ply voltage for the boost inductor. The disconnect drive
current is returned to this pin. The disconnect operates
until CAP falls to 1.2V above V BAT .
SWN (Pin 4): Switch Pin for Negative (Inverter) Chan-
nel. Connect inverter input inductor and ?ying capacitor
here.
RUN/SS (Pin 8): Run/Soft-Start Pin. Connect to an open-
drain transistor. The transistor must sink 1.4μA from
RUN/SS. Pull RUN/SS below 100mV to shut down the chip.
Connect a capacitor from RUN/SS to ground to program
soft-start functionality. The soft-start will slowly bring the
boost channel into regulation and then slowly bring up
the inverter. RUN/SS must be above 1.6V to allow both
channels to reach full current. If soft-start is not required,
this pin can be driven with a logic signal, but the RUN/SS
voltage must remain below V IN .
FBP (Pin 9): Feedback Pin for Boost. Connect boost
feedback resistor R1 from FBP to CAP. Choose R1 ac-
cording to:
DN (Pin 5): Anode of Internal Schottky for Inverter. Connect
inverter output inductor and ?ying capacitor here.
R 1 =
V POS – 1. 23
25 μA
V IN (Pin 6): Input Supply Pin. V IN is used to power the
control circuitry of the LT3487. This pin must be locally
bypassed with an X5R or X7R type ceramic capacitor.
FBN (Pin 7): Feedback Pin for Inverter. Connect feedback
resistor R2 from this pin to V NEG . Choose R2 according
to:
Pin voltage = 1.23V when regulated.
V POS (Pin 10): Output Pin for Boost Channel. V POS is
the collector of the output disconnect PNP. Connect the
boost load to V POS . Connect capacitor C5 between CAP
and V POS for stability.
R 2 = –
V NEG
25 μA
Exposed Pad (Pin 11): GND. Tie directly to ground plane
through multiple vias under the package for optimum
thermal performance.
Pin voltage = 0V when regulated.
3487f
6
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| LT3489 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start |
| LT3489EMS8E | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start |
| LT3489EMS8E#PBF | 功能描述:IC REG BOOST ADJ 2.5A 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3489EMS8E#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 2MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 2MHZ, MSOP-8 |
| LT3489EMS8E#TR | 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, 2.5A, 2MHz Step-Up Regulator in MS8E |
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