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參數(shù)資料
| 型號： | MAX863EEE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Dual, High-Efficiency, PFM, Step-Up DC-DC Controller |
| 中文描述： | DUAL SWITCHING CONTROLLER, PDSO16 |
| 封裝： | 0.150 INCH, 0.025 INCH PITCH, QSOP-16 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大小： | 194K |
| 代理商： | MAX863EEE |
M
Dual, High-Effic ienc y, PFM, S tep-Up
DC-DC Controller
______________________________________________________________________________________
15
MAX863
EXT2
CS2
V
OUT2
= 12V
FLYBACK OR SEPIC
OUTPUT
V
OUT1
= 3.3V, 600mA
V
IN
= 2.0V TO 11V
OR
V
OUT2
N1B
IRF7301
C7
0.1
μ
F
R4
115k
1%
C6
10pF
C2
1
μ
F
C5
100
μ
F
20V
≤
0.1
R2
50m
R3
1M
1%
N1A
R1
50m
R5
R6
R7
100k
C1
330
μ
F
10V
≤
0.1
D1
MBRS340T3
T1
10
μ
H, 2.5A
CTX10-4
D2
MBRS340T3
L2
10
μ
H
2A
C3
100
μ
F
10V
≤
0.1
C4
100
μ
F
10V
≤
0.1
C9
10
μ
F
ON/OFF
FB2
SHDN1
EXT1
D3
CMPSH-3C
CS1
LBI
LOW-BATTERY
DETECTOR OUTPUT
LBO
SENSE1 FB1
PGND
BOOT
V
DD
GND
SHDN2
REF
C8
82pF
Figure 9. 3-Cell to 3.3V Step-Up/Step-Down Logic Supply with 12V for Flash Memory or Analog Functions
__________Applic ations Information
Low-Input-V oltage Operation
When the voltage at V
DD
falls and EXT1 or EXT2
approaches the MOSFET gate-to-source threshold volt-
age, the MOSFET may operate in its linear region and
dissipate excessive power. Prolonged operation in this
mode may damage the MOSFET if power dissipation
ratings are inadequate. This effect is more significant in
non-bootstrapped mode, but can occur in boot-
strapped mode if the input voltage drops so low that it
cannot support the load and causes the output voltage
to collapse. To avoid this condition, use logic-level or
low-threshold MOSFETs.
S tarting Up Under Load
The Typical Operating Characteristics show the
Bootstrapped-Mode Minimum Start-Up Input Voltage
vs. Output Current graph. The MAX863 is not intended
to start up under full load in bootstrapped mode with
low input voltages.
________________Applic ation Circ uits
Bootstrapped 5V Logic and
24V LCD Bias S upply
The circuit in Figure 8 operates from two AA or AAA
cells, and generates 5V (up to 750mA) for logic and
24V (up to 35mA) for an LCD bias supply. OUT1 is
used to bootstrap the MAX863 for better MOSFET gate
drive. V
OUT1
can be set to 3.3V if low threshold
MOSFETs are used.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX863EEE+ | 功能描述:DC/DC 開關(guān)控制器 Dual PFM Step-Up DC/DC Controller 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 |
| MAX863EEE+T | 功能描述:DC/DC 開關(guān)控制器 Dual PFM Step-Up DC/DC Controller 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 |
| MAX863EEE-T | 功能描述:DC/DC 開關(guān)控制器 Dual PFM Step-Up DC/DC Controller 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 |
| MAX863EVKIT | 功能描述:DC/DC 開關(guān)控制器 Evaluation Kit for the MAX863 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 |
| MAX8640EVKIT | 制造商:Maxim Integrated Products 功能描述:500MA 4MHZ/2MHZ SYNCHRONOUS STEP-D - Rail/Tube |
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