參數(shù)資料
型號： MAX1778EUG
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)： 11/38頁
文件大?。?/td> 1051K
代理商： MAX1778EUG
M
Quad-Output TFT LCD DC-DC
Converters with Buffer
______________________________________________________________________________________
11
RIPPLE VOLTAGE WAVEFORMS
8V
-5V
20V
1
μ
s/div
A. V
MAIN
= 8V, I
MAIN
= 200mA, 10mV/div
B. V
NEG
= -5V, I
NEG
= 10mA, 20mV/div
C. V
POS
= 20V, I
POS
= 5mA, 20mV/div
C
B
A
STEP-UP CONVERTER
SOFT-START (LIGHT LOAD)
MAX1778 toc17
0
6V
0.5A
1ms/div
A. V
SHDN
= O TO 2V, 2V/div
B. V
= 8V, 2V/div
C. INDUCTOR CURRENT, 500mA/div
R
LOAD
= 400
C
B
A
2V
8V
4V
0
STEP-UP CONVERTER
SOFT-START (HEAVY LOAD)
MAX1778 toc18
0
6V
1.0A
1ms/div
A. V
SHDN
= O TO 2V, 2V/div
B. V
MAIN
= 8V, 2V/div
C. INDUCTOR CURRENT, 500mA/div
R
LOAD
= 20
C
B
A
2V
8V
4V
0.5A
0
POWER-UP SEQUENCE
MAX1778 toc19
0
0
10V
2ms/div
A. V
= O TO 2V, 2V/div
B. RDY, 5V/div
C. POSITIVE CHARGE PUMP = V
POS
= 20V, R
LOAD
= 4k
, 10V/div
D. STEP-UP CONVERTER: V
MAIN
= 8V, R
LOAD
= 40
, 10V/div
E. NEGATIVE CHARGE PUMP: V
NEG
= -5V, R
LOAD
= 500
, 10V/div
E
B
A
2V
5V
20V
0
-10V
C
D
POWER-UP SEQUENCE
(CIRCUIT OF FIG.10)
MAX1778 toc20
0
10V
0
1ms/div
A. RDY, 2V/div
B. POSITIVE CHARGE PUMP, V
POS(SYS)
= 20V, 10V/div
C. STEP-UP CONVERTER: V
MAIN(SYS)
= 8V, 10V/div
D. NEGATIVE CHARGE PUMP, V
NEG
= -5V, -5V/div
B
A
2V
20V
0
-5V
C
D
4V
MAX1778 toc21
C
B
A
10V
5V
4V
5V
2V
0
0
0
100
μ
s/div
POWER-UP INTO SHORT-CIRCUIT
(CIRCUIT OF FIG. 10)
A. RDY, 2V/div
B. GATE OF N-CH MOSFET, 5V/div
C. STEP-UP CONVERTER, V
MAIN(START)
= 8V, 5V/div
V
MAIN(SYS)
= GND
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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MAX1778EUG+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD w/Buffer RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT
MAX1778EUG+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD w/Buffer RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT
MAX1778EUG-T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT
MAX1778EVKIT 功能描述:電源管理IC開發(fā)工具 MAX1778/80/81/82 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
MAX1779EUE 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)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(fēng)格:SMD/SMT
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