參數(shù)資料
型號: MAX1880
廠商: Maxim Integrated Products, Inc.
元件分類: DC/DC變換器
英文描述: Quad-Output TFT LCD DC-DC Converters with Buffer
中文描述: 四路輸出、TFT LCD DC-DC轉(zhuǎn)換器,帶有緩沖器
文件頁數(shù): 13/38頁
文件大?。?/td> 1051K
代理商: MAX1880
M
Quad-Output TFT LCD DC-DC
Converters with Buffer
______________________________________________________________________________________
13
0
1
1000
100
10
FREQUENCY (kHz)
100
40
20
80
60
M
P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
C
LDOOUT
= 4.7
μ
F
I
LDOOUT
= 40mA
0
40
REGION OF STABLE C
LDOOUT
ESR
vs. LOAD CURRENT
M
I
LDOOUT
(mA)
C
L
)
10
20
30
100
0.01
0.1
10
1
C
LDOOUT
= 1
μ
F
STABLE REGION
B
A
4.96V
4OmA
0
5.00V
100
μ
s/div
LOAD-TRANSIENT RESPONSE
(INTERNAL LINEAR REGULATOR)
A. I
LDO
= 100
μ
A TO 40mA, 40mA/div
B. V
LDO
= 5V, 20mV/div
V
SUPL
= V
LDO
+ 500mV
B
A
4.94V
4OmA
0
5.00V
100
μ
s/div
LOAD-TRANSIENT RESPONSE NEAR
DROPOUT (INTERNAL LINEAR REGULATOR)
A. I
LDO
= 100
μ
A TO 40mA, 40mA/div
B. V
LDO
= 5V, 20mV/div
V
IN
= V
LDO
+ 100mV
MAX1778 toc31
C
B
A
0.5A
0
5.0V
8.0V
1.0A
10
μ
s/div
INTERNAL LINEAR-REGULATOR
RIPPLE REJECTION
A. V
LDOOUT
= 5V, I
= 40mA, 10mV/div
B. V
MAIN
= V
SUPL
= 8V, 200mV/div
C. I
MAIN
= 0 TO 750mA, 500mA/div
MAX1778 toc32
C
B
A
4V
2V
2V
0
2V
4V
0
400
μ
s/div
INTERNAL LINEAR-REGULATOR
STARTUP
A. V
S
HDN
= 0 TO 2V, 2V/div
B. V
LDOOUT
= 5V, R
LDOOUT
= 125
, 2V/div
C. V
MAIN
= 8V, R
MAIN
= 40
, 2V/div
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= +3.3V,
SHDN
= IN, V
MAIN
= V
SUPP
= V
SUPN
= V
SUPB
= V
SUPL
= 8V, BUF- = BUFOUT,
BUF+ = FLTSET = TGND = PGND = GND, T
A
= +25
°
C.)
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MAX1881 Quad-Output TFT LCD DC-DC Converters with Buffer
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