参数资料
型号: L5985
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 2 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封装: 3 X 3 MM, 1.08 MM HEIGHT, LEAD FREE, VFQFPN-8
文件页数: 1/37页
文件大小: 856K
代理商: L5985
June 2009
Doc ID 13006 Rev 5
1/37
37
L5985
2 A step-down switching regulator
Features
2 A DC output current
2.9 V to 18 V input voltage
Output voltage adjustable from 0.6 V
250 kHz switching frequency, programmable
up to 1 MHz
Internal soft-start and Inhibit
Low dropout operation: 100% duty cycle
Voltage feed-forward
Zero load current operation
Over current and thermal protection
VFQFPN8 3 mm x 3 mm package
Applications
Consumer: STB, DVD, DVD recorder, car
audio, LCD TV and monitors
Industrial: chargers, PLD, PLA, FPGA
Networking: XDSL, modems, DC-DC modules
Computer: optical storage, hard disk drive,
printers, audio/graphic cards
LED driving
Description
The L5985 is a step-down switching regulator with
2.5 A (min) current limited embedded power
MOSFET, so it is able to deliver up to 2 A DC
current to the load depending on the application
condition.
The input voltage can range from 2.9 V to 18 V,
while the output voltage can be set starting from
0.6 V to VIN. Having a minimum input voltage of
2.9 V, the device is suitable for 3.3 V bus.
Requiring a minimum set of external components,
the device includes an internal 250 kHz switching
frequency oscillator that can be externally
adjusted up to 1 MHz.
The VFQFPN8 package with exposed pad allows
reducing the RthJA down to approximately
60 °C/W.
VFQFPN8 3 mm x 3 mm
Figure 1.
Application circuit
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相关代理商/技术参数
参数描述
L5985_08 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:2 A step-down switching regulator
L5985TR 功能描述:直流/直流开关调节器 2a Step-Down Switching Reg RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986 功能描述:直流/直流开关调节器 2.5 A buck switching regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986A 功能描述:直流/直流开关调节器 2.5 A STEP-DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5
L5986ATR 功能描述:直流/直流开关调节器 Step-down switch regulator, 2.5A RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5