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參數(shù)資料
| 型號： | MAX1974EUB |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Smallest 1A, 1.4MHz Step-Down Regulators |
| 中文描述： | 2.4 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | MICRO, SOP-10 |
| 文件頁數(shù)： | 14/15頁 |
| 文件大?。?/td> | 331K |
| 代理商： | MAX1974EUB |
M
V
OUT
= 2.5V
I
OUT(MAX)
= 1A
C
OUT
= 4.7μF
V
FB
= 1.25V
R
CS
= 0.26
g
m
= 50μS
f
C
= 140kHz
Select the nearest standard value: C
C
= 560pF
Select the nearest standard value: R
C
= 43k
PC Board Layout
A properly designed PC board layout is important in
any switching regulator. The switching power stage
requires particular attention. Follow these guidelines for
good PC board layout:
1) Place decoupling capacitors as close to IC pins as
possible. Keep the power ground plane (connected
to PGND) and signal ground plane (connected to
GND) separate. Connect the two ground planes with
a single connection from PGND to GND.
2) Input and output capacitors are connected to the
power ground plane; all other capacitors are con-
nected to the signal ground plane.
3) Keep the high-current paths as short and wide as
possible.
4) If possible, connect IN, LX, and PGND separately to
a large land area to help cool the IC to further
improve efficiency and long-term reliability.
5) Ensure all feedback connections are short and
direct. Place feedback resistors (if used) as close to
the IC as possible.
6) Route high-speed switching nodes (LX) away from
sensitive analog areas (FB, COMP, SS).
R
C
C
V
I
OUT MAX
(
k
C
OUT
C
OUT
=
×
×
=
×
=
0 5
.
4 7 10
.
560 10
2 5
0 5 1
.
41 9
6
12
.
.
)
C
V
I
R
g
f
pF
C
FB
OUT MAX
1
0 26
.
CS
m
C
=
×
×
×
×
×
=
×
×
×
×
=
0 5
.
1
1
2
1 25
0 5 1
.
50 10
1
2
140000
547
6
.
(
)
π
π
Smallest 1A, 1.4MHz Step-Down Regulators
14
______________________________________________________________________________________
Chip Information
TRANSISTOR COUNT: 1998
PROCESS: BiCMOS
V
OUT
(V)
2.5
1.8
C
IN
(μF)
4.7
4.7
C
OUT
(μF)
4.7
4.7
C
C
(pF)
560
560
R
C
(k
)
43
30
Table 4. Recommended Components for the MAX1973
V
OUT
(V)
1.5
1.0
C
IN
(μF)
4.7
4.7
C
OUT
(μF)
4.7
4.7
C
C
(pF)
330
330
R
C
(k
)
43
27
Table 5. Recommended Components for the MAX1974
Selector Guide
PART
FEATURES
Voltage Margining
Power-OK Output
OUTPUT PRESET
1.8V or 2.5V
1V or 1.5V
MAX1973EUB
MAX1974EUB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1974EUB+ | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB+T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 1A 1.4MHz Step-Down Regulator RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB-G05 | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1974EUB-T | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| MAX1974EUB-TG05 | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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