參數(shù)資料
型號(hào)： LP5550SQX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： PowerWise Technology Compliant Energy Management Unit
中文描述： 0.75 A SWITCHING REGULATOR, 1360 kHz SWITCHING FREQ-MAX, QCC16
封裝： LLP-16
文件頁(yè)數(shù)： 19/25頁(yè)
文件大?。?/td> 1056K
代理商： LP5550SQX
Operation Description
DEVICE INFORMATION
The LP5550 is a PowerWise Interface (PWI) compliant
power management unit (PMU) for application or baseband
processors in mobile phones or other portable equipment. It
operates cooperatively with processors using National Semi-
conductor’s Advanced Power Controller (APC) to provide
Adaptive or Dynamic Voltage Scaling (AVS, DVS) which
drastically improves processor efficiencies compared to con-
ventional power delivery methods. The LP5550 consists of a
high efficiency switching DC/DC buck converter to supply the
AVS or DVS voltage domain, three LDOs for supplying the
logic, PLL, and memory, and PWI registers and logic.
OPERATION STATE DIAGRAM
The LP5550 has four operating states: Start-up, Active,
Sleep and Standby.
The Start-up state is the default state after reset. All regula-
tors are off and PWROK output is ‘0’. The device will power
up when the external enable-input is pulled high. After the
power-up sequence LP5550 enters the Active state.
In the Active state all regulators are on and PWROK-output
is ‘1’. Immediately after Start-up the output voltages are at
their default levels. LP5550 can be turned off by supplying
the Shutdown command over PWI, or by setting ENABLE
and/or RESETN to ’0’. The LP5550 can be switched to the
Sleep state by issuing the Sleep command.
In the Sleep state the core voltage regulator is off, but the
PWROK output is still ‘1’. The memory voltage regulator
(VO3) provides the programmed memory retention voltage.
LDO1 and LDO2 are on. The LP5550 can be activated from
the Sleep state by giving the Wake-up command. This re-
sumes the last programmed Active state configuration. The
device can also be switched off by giving the Shutdown
command, or by setting ENABLE and/or RESETN to ‘0’
In the Shutdown-state all output voltages are ‘0’, and
PWROK-signal is ‘0’ as well. The LP5550 can exit the
Shutdown-state if either ENABLE or RESETN is ‘0’. In either
case the device moves to the Start-up state. See the EN-
ABLE
Figure 6
shows the LP5550 state diagram. The figure as-
sumes that supply voltage to the regulator IC is in the valid
range.
20154545
FIGURE 6. LP5550 State Diagram
L
www.national.com
19
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP5550SQX/NOPB 功能描述:電池管理 RoHS:否 制造商:Texas Instruments 電池類(lèi)型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
LP5551 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:PowerWise⑩ Technology Compliant Energy Management Unit
LP5551SQ 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
LP5551SQ/NOPB 功能描述:PMIC 解決方案 RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
LP5551SQEV 功能描述:電源管理IC開(kāi)發(fā)工具 LP5551SQ EVAL BRD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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