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參數(shù)資料
| 型號： | LM10506TMX-A |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PBGA34 |
| 封裝： | 0.40 MM PITCH, MICRO SMD-34 |
| 文件頁數(shù)： | 18/34頁 |
| 文件大?。?/td> | 1020K |
| 代理商： | LM10506TMX-A |
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20.0 Device Operating Modes
20.1 STARTUP SEQUENCE
The startup mode of the LM10506 will depend on the input
voltage. Once VIN reaches the UVLO threshold, there is a 15
msec delay before the LM10506 determines how to set up the
buck regulators. If V
IN is below 3.6V, then Buck 1 and Buck 2
will be in bypass mode, see Section 19.2.7 Bypass-FET Op-
eration on Buck 1 and Buck 2 for functionality description. If
the VIN voltage is greater than 3.6V the bucks will start up as
the standard regulators. The 3 buck regulators are staggered
during startup to avoid large inrush currents. There is a fixed
delay of 2 msec between the startup of each regulator.
The Startup Sequence will be:
1.
15 msec (±30%) delay after V
IN above UVLO
2.
LDO
→ 3.2V → 3.2V
3.
2 msec delay
4.
Buck 1
→ 3.0V → 3.0V
5.
2 msec delay
6.
Buck 2
→ 3.0V or if H/L_B2 = Low → 1.8V
(For LM10506-A Buck 2
→ 2.0V or if H/L_B2 = Low →
1.8V)
7.
2 msec delay
8.
Buck 3
→ 1.2V or if H/L_B3 = Low → 1.0V
30166206
FIGURE 6. Operating Modes
20.2 POWER-ON DEFAULT AND DEVICE ENABLE
The device is always enabled and the LDO is always on, un-
less outside of operating voltage range. There is no LM10506
Enable Pin. Once V
IN reaches a minimum required input Volt-
age the power-up sequence will be started automatically and
the startup sequence will be initiated. Once the device is
started, the output voltage of the Bucks 1 and 2 can be indi-
vidually disabled by accessing their corresponding BKEN
register bits (BUCK CONTROL).
20.3 RESET: PIN FUNCTION
The RESET pin is internally pulled high. If the reset pin is
pulled low, the device will perform a complete reset of all the
registers to their default states. This means that all of the volt-
age settings on the regulators will go back to their default
states.
20.4 STANDBY: FUNCTION
The Device can be programmed into Standby mode. There
are 2 ways for doing that:
1.
STANDBY pin
2.
Programming via SPI
20.4.1 STANDBY Pin
When the STANDBY pin is asserted high, the LM10506 will
enter Standby Mode. While in Standby Mode, Buck 1 and
Buck 2 are disabled. Buck 3’s output voltage is transitioned
to the PSML (Programmable Standby Mode Level) as set by
25
www.national.com
LM10506
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LM10506TMX-A/NOPB | 功能描述:直流/直流開關轉(zhuǎn)換器 Triple Buck & LDO Power Mgmt Unit RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM10506TMX-C/NOPB | 制造商:Texas Instruments 功能描述:LINEAR IC |
| LM10506TMXNOPB | 制造商:Texas Instruments 功能描述:Power Management Unit 34-Pin Micro SMD T/R |
| LM10507TMX-A/NOPB | 功能描述:Solid State Drives (SSD) PMIC 34-DSBGA (2.82x2.82) 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 應用:固態(tài)驅(qū)動器（SSD） 電流 - 電源:50μA 電壓 - 電源:3 V ~ 5.5 V 工作溫度:-30°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:34-WFBGA，DSBGA 供應商器件封裝:34-DSBGA（2.82x2.82） 標準包裝:1 |
| LM10520 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:20A Adaptive Voltage Scaling (AVS) Evaluation Board |
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