參數(shù)資料
型號(hào)： 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)： 10/16頁
文件大?。?/td> 194K
代理商： MAX863EEE
M
Dual, High-Effic ienc y, PFM, S tep-Up
DC-DC Controller
10
______________________________________________________________________________________
S hutdown Mode
The MAX863 has two shutdown inputs useful for con-
serving power and extending battery life. Driving
SHDN1
or
SHDN2
low turns off the corresponding DC-
DC controller and reduces quiescent current. Driving
both shutdown pins low turns off the reference, control,
and biasing circuitry, putting the MAX863 in a 1μA
shutdown mode. Connect
SHDN1
and
SHDN2
to V
DD
for normal operation.
__________________Design Proc edure
Boost DC-DC converters using the MAX863 can be
designed in a few simple steps to yield a working first-
iteration design. All designs should be prototyped and
tested prior to production. Table 1 provides a list of
component suppliers.
Two design methods are included. The first uses
graphs for selecting the peak current required for 3.3V,
5V, 12V, and 24V outputs. The second uses equations
for selecting the peak current and inductor value in cir-
cuits with other outputs. When designing high-voltage,
flyback, SEPIC, and autotransformer boost circuits,
contact Maxim’s Applications Department for the
appropriate design equations.
S pec ify Design Objec tives
For each of the two outputs, specify the output voltage
and maximum load current, as well as maximum and
0
0.1
0
12
0.2
0.3
1.0
M
M
0.6
0.7
0.4
0.5
8
0.8
0.9
10
2
4
6
Cond: Single +5V
Code = FFFhex
V
OUT
= 24V, L = 1.5 L
MIN
A: I
PEAK
= 3A
B: I
PEAK
= 2A
C: I
PEAK
= 1.47A
D: I
PEAK
= 1A
E: I
PEAK
= 0.67A
F: I
PEAK
= 0.5A
A
B
C
D
E
F
Figure 5d. Maximum Output Current vs. Input Voltage and
IPEAK(V
OUT
= 24V)
0
1.0
4.5
0.4
0.6
0.2
2.0
M
M
1.2
1.4
0.8
1.0
3.5
1.6
1.8
4.0
2.5
1.5
2.0
3.0
Cond: Single +5V
Code = FFFhex
V
OUT
= 5V, L = 1.5 L
MIN
A: I
PEAK
= 3A
B: I
PEAK
= 2A
C: I
PEAK
= 1.47A
D: I
PEAK
= 1A
E: I
PEAK
= 0.67A
F: I
PEAK
= 0.5A
A
B
C
D
E
F
Figure 5b. Maximum Output Current vs. Input Voltage and
IPEAK(V
OUT
= 5V)
0
0
12
0.5
2.5
M
M
1.5
1.0
8
2.0
10
2
4
6
Cond: Single +5V
Code = FFFhex
V
OUT
= 12V, L = 1.5 L
MIN
A: I
PEAK
= 3A
B: I
PEAK
= 2A
C: I
PEAK
= 1.47A
D: I
PEAK
= 1A
E: I
PEAK
= 0.67A
F: I
PEAK
= 0.5A
A
B
C
D
E
F
Figure 5c. Maximum Output Current vs. Input Voltage and
IPEAK(V
OUT
= 12V)
0
1.0
3.0
0.5
2.5
M
M
2.0
1.5
1.0
1.4
2.4
2.0
2.6 2.8
1.8
1.2
1.6
2.2
Cond: Single +5V
Code = FFFhex
V
OUT
= 3.3V, L = 1.5 L
MIN
A: I
PEAK
= 3A
B: I
PEAK
= 2A
C: I
PEAK
= 1.47A
D: I
PEAK
= 1A
E: I
PEAK
= 0.67A
F: I
PEAK
= 0.5A
A
B
C
D
E
F
Figure 5a. Maximum Output Current vs. Input Voltage and
IPEAK(V
OUT
= 3.3V)
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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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