參數(shù)資料
型號： MAX1880EUG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Quad-Output TFT LCD DC-DC Converters with Buffer
中文描述： 2.05 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, PDSO24
封裝： 4.40 MM, 1.10 MM HEIGHT, MO-153AD, TSSOP-24
文件頁數(shù)： 33/38頁
文件大?。?/td> 1051K
代理商： MAX1880EUG
M
Quad-Output TFT LCD DC-DC
Converters with Buffer
______________________________________________________________________________________
33
Applications Information
Low-Profile Components
Notebook applications generally require low-profile
components, potentially limiting the circuit
’
s perfor-
mance. For example, low-profile inductors typically
have lower saturation ratings and more series resis-
tance, limiting output current and efficiency. Low-profile
capacitors have lower voltage ratings for a given
capacitance value, so 3.3μF low-profile capacitors with
voltage ratings greater than 10V were not available at
the time of publication.
Desktop Monitors
Monitor applications do not have the same component
height restrictions associated with laptops, allowing
more flexibility in component selection (Figure 8).
Larger output capacitors with higher voltage ratings
allow configurations with output voltages above 10V.
Additionally, physically larger inductors with less series
resistance and higher saturation ratings provide more
output current and higher efficiency.
Input Voltage Above and
Below the Output Voltage
Combining the step-up converter and linear regulator
as shown in Figure 9 provides output voltage regulation
above and below the input voltage. Supplied by the
step-up converter, the linear regulator output provides
a constant output voltage (V
LDO
). When the input volt-
age exceeds the main step-up converter
’
s nominal out-
put voltage, the controller stops switching but the linear
regulator maintains the output voltage. When the input
voltage drops below the output voltage, the step-up
IN
SHDN
BUFFER OUTPUT
V
BUFOUT
= V
SUPB
/2
POSITIVE
V
POS
= 24V
RDY
BUF-
BUFOUT
SUPN
SUPP
LX
L1
6.8
μ
H
POWER INPUT
V
BATT
= 10V TO 15V
INPUT
V
IN
= 3.3V TO 5V
C1
0.1
μ
F
C
LDO
(2) 3.3
μ
F
C6
0.1
μ
F
C7
0.1
μ
F
C3
1.0
μ
F
C
BUF
1.0
μ
F
C
INTG
470pF
C2
0.1
μ
F
C
OUT
(3) 3.3
μ
F
C4
0.1
μ
F
C
IN
4.7
μ
F
C
LDOOUT
3.3
μ
F
R
RDY
100k
R10
100k
R5
475k
R3
909k
R8
49.9k
R1
511k
R2
49.9k
R4
49.9k
R7
470k
R6
49.9k
R9
6.8k
NEGATIVE
V
NEG
= -12V
TO LOGIC
FB
FBL
SUPL
LDOOUT
BUF+
GND
TGND
FBP
DRVP
FBN
DRVN
REF
FLTSET
INTG
PGND
SUPB
C
REF
0.22
μ
F
MAX1778
LDO
V
LDO
= 13V
Q1
C5
1.0
μ
F
R9
30k
Figure 9. Input Voltage Above and Below the Output Voltage
相關PDF資料
PDF描述
MAX1881EUG Quad-Output TFT LCD DC-DC Converters with Buffer
MAX1882EUG Quad-Output TFT LCD DC-DC Converters with Buffer
MAX1779 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125
MAX1779EUE 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125
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相關代理商/技術參數(shù)
參數(shù)描述
MAX1880EUG+ 功能描述:直流/直流開關轉換器 Quad-Output TFT LCD 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
MAX1880EUG+T 功能描述:直流/直流開關轉換器 Quad-Output TFT LCD 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
MAX1880EUG-T 功能描述:直流/直流開關轉換器 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
MAX1881EUG 功能描述:直流/直流開關轉換器 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
MAX1881EUG+ 功能描述:直流/直流開關轉換器 Quad-Output TFT LCD 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
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