參數(shù)資料
型號： L5987A
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 4.4 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封裝： ROHS COMPLIANT, HSOP-8
文件頁數(shù)： 1/41頁
文件大?。?/td> 1002K
代理商： L5987A
June 2009
Doc ID 14972 Rev 3
1/41
41
L5987
3 A step-down switching regulator
Features
■ 3 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
■ VFQFPN3x3-8L and HSOP8 package
Applications
■ Consumer:
STB, DVD, DVD recorder, car audio, LCD TV
and monitors
■ Industrial:
PLD, PLA, FPGA, chargers
■ Networking: XDSL, modems, DC-DC modules
■ Computer:
Optical storage, hard disk drive, printers,
audio/graphic cards
■ LED driving
Description
The L5987 is a step-down switching regulator with
3.5 A (minimum) current limited embedded power
MOSFET, so it is able to deliver up to 3 A current
to the load depending on the application
conditions (Section 5.7 and Section 5.8).
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 also 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 QFN and the HSOP packages with exposed
pad allow reducing the RthJA down to 60 °C/W
and 40 °C/W respectively.
HSOP8 exposed pad
VFQFPN8 3x3 mm
Figure 1.
Application circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L5987ATR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Step-down switch regulator, 3A RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5987TR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3 A Step-down Switch Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5988 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4A step-down switching regulator with synchronous rectification
L5988D 功能描述:直流/直流開關(guān)調(diào)節(jié)器 STEP DOWN SWITCH REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
L5988DTR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4A Step Down Reg 2.9V to 18V 200ns RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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