參數(shù)資料
型號(hào)： MAX1540AETJ
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Dual Step-Down Controllers with Saturation Protection, Dynamic Output, and Linear Regulator
中文描述： DUAL SWITCHING CONTROLLER, 620 kHz SWITCHING FREQ-MAX, QCC32
封裝： 5 X 5 MM, 0.80 MM HEIGHT, MO-220-WHHD-2, TQFN-32
文件頁數(shù)： 22/49頁
文件大小： 794K
代理商： MAX1540AETJ
M
Standard Application Circuits
The MAX1540A standard application circuit (Figure 1)
generates a 1.8V and 2.5V rail for general-purpose use
in a notebook computer. The MAX1541 Standard
Application Circuit (Figure 12) generates a dynamically
adjustable output voltage (OUT1), typical of a graphics-
processor core requirement, and a fixed 2.5V output
(OUT2).
See Table 1 for component selections. Table 2 lists the
component manufacturers.
Detailed Description
The MAX1540A/MAX1541 provide three independent out-
puts with independent enable controls. They contain two
Quick-PWM step-down controllers ideal for low-voltage
power supplies for notebook computers, and a 100mA
linear regulator. Maxim’s proprietary Quick-PWM pulse-
width modulators in the MAX1540A/ MAX1541 are specifi-
cally designed for handling fast load steps while
maintaining a relatively constant operating frequency and
inductor operating point over a wide range of input volt-
ages. The Quick-PWM architecture circumvents the poor
load-transient timing problems of fixed-frequency current-
mode PWMs, while also avoiding the problems caused
by widely varying switching frequencies in conventional
constant-on-time and constant-off-time PWM schemes.
The MAX1540A linear regulator draws power from the
battery voltage and generates a preset 5V, which can
be used to bootstrap the buck controllers for automatic
startup. The MAX1541’s linear regulator can be con-
nected to any input source from 4.5V to 28V to gener-
ate an adjustable output voltage as low as 1.25V, or as
high as the input source with 800mV of dropout at
50mA load.
Single-stage buck conversion allows the MAX1540A/
MAX1541 to directly step down high-voltage batteries
for the highest possible efficiency. Alternatively, two-
stage conversion (stepping down from another system
supply rail instead of the battery at a higher switching
frequency) allows the minimum possible physical size.
The MAX1540A generates chipset, dynamic random-
access memory (DRAM), CPU I/O, or other low-voltage
supplies down to 0.7V. The MAX1541 powers chipsets
and graphics processor cores that require dynamically
adjustable output voltages, or generates the active ter-
mination bus that must track the input reference. The
MAX1540A is available in a 32-pin thin QFN package
with optional inductor-saturation protection and over-
voltage/undervoltage protection. The MAX1541 is avail-
able in a 40-pin thin QFN package with optional
inductor-saturation protection and overvoltage/under-
voltage protection.
+5V Bias Supply (V
CC
and V
DD
)
The MAX1540A/MAX1541 require a 5V bias supply in
addition to the battery. This 5V bias supply is either the
MAX1540A/MAX1541s’ internal linear regulator or the
notebook’s 95%-efficient 5V system supply. Keeping the
bias supply external to the IC can improve efficiency
and allows the fixed 5V or adjustable linear regulator
(MAX1541) to be used for other applications. For the
MAX1540A, the gate-driver input supply (V
DD
) is con-
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
22
______________________________________________________________________________________
Table 2. Component Suppliers
SUPPLIER
PHONE
WEBSITE
Central
Semiconductor
631-435-1110
(USA)
www.centralsemi.com
Coilcraft
800-322-2645
(USA)
www.coilcraft.com
Fairchild
Semiconductor
888-522-5372
(USA)
www.fairchildsemi.com
International
Rectifier
310-322-3331
(USA)
www.irf.com
Kemet
408-986-0424
(USA)
www.kemet.com
Panasonic
65-6231-3226
(Singapore),
408-749-9714
(USA)
www.panasonic.com
Sanyo
619-661-6835
(USA)
www.sanyovideo.com
Siliconix
(Vishay)
203-268-6261
(USA)
www.vishay.com
Sumida
408-982-9660
(USA)
www.sumida.com
Taiyo Yuden
03-3667-3408
(Japan),
408-573-4150
(USA)
www.t-yuden.com
TDK
847-803-6100
(USA),
81-3-5201-7241
(Japan)
www.component.tdk.com
TOKO
858-675-8013
(USA)
www.tokoam.com
相關(guān)PDF資料
PDF描述
MAX1543 TFT LCD DC-to-DC Converter with Operational Amplifiers
MAX1542 TFT LCD DC-to-DC Converter with Operational Amplifiers
MAX1542-MAX1543 TFT LCD DC-to-DC Converter with Operational Amplifiers
MAX1543ETP TFT LCD DC-to-DC Converter with Operational Amplifiers
MAX1542ETP TFT LCD DC-to-DC Converter with Operational Amplifiers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1540AETJ+ 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1540AETJ+T 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr w/Saturation Prot RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1540ETJ 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1540ETJ+ 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1540ETJ+T 功能描述:DC/DC 開關(guān)控制器 Dual Step-Down Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*