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參數(shù)資料
| 型號(hào)： | MAX849 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Low-Noise, Step-Up DC-DC Converters(高功率，低噪，帶0.5AMOSFET功率開(kāi)關(guān),步升DC-DC變換器) |
| 中文描述： | 1至3節(jié)電池、大功率、低噪聲、升壓型DC-DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大?。?/td> | 192K |
| 代理商： | MAX849 |
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M
1-Cell to 3-Cell, High-Power,
Low-Noise, S tep-Up DC-DC Converters
_______________________________________________________________________________________
5
__________________________________________Typic al Operating Charac teristic s
(T
A
= +25°C, unless otherwise noted.)
100
90
40
0.1
1
10
100
1000
MAX849
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
50
M
LOAD CURRENT (mA)
E
60
70
80
V
IN
= 2.4V
PFM
PWM
V
IN
= 0.9V
V
IN
= 1.2V
100
90
40
30
0.1
1
10
100
1000
MAX849
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 5V)
50
M
LOAD CURRENT (mA)
E
60
70
80
V
IN
= 1.2V
V
IN
= 2.4V
V
IN
= 3.6V
PFM
PWM
70
60
0.1
1
10
100
1000
MAX848
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
80
M
LOAD CURRENT (mA)
E
90
100
V
IN
= 2.4V
V
IN
= 1.2V
V
IN
= 0.9V
PFM
PWM
14
0
0
2
3
1
4
6
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
4
12
M
INPUT VOLTAGE (V)
I
5
8
2
10
6
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
1.252
1.248
-40
0
TEMPERATURE (°C)
-20
20
60
100
80
REFERENCE VOLTAGE
vs. TEMPERATURE
1.249
1.251
M
R
40
1.250
18
14
0
0
2
1
3
6
5
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
4
16
12
M
S
μ
A
4
8
2
10
6
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
INCLUDES ALL EXTERNAL
COMPONENT LEAKAGES.
CAPACITOR LEAKAGE
DOMINATES AT
T
A
= +85°C
INPUT VOLTAGE (V)
2.0
1.8
1.6
0.6
0.01
0.1
1
10
100
1000
START-UP VOLTAGE vs. LOAD CURRENT
(V
OUT
= 3.3V, PWM MODE)
0.8
M
LOAD CURRENT (mA)
S
1.0
1.2
1.4
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
1.252
1.238
0
20
REFERENCE CURRENT (
μ
A)
10
30
50
60
70
80
REFERENCE VOLTAGE
vs. REFERENCE CURRENT
1.242
1.250
M
R
40
1.246
1.240
1.248
1.244
0.25
-0.25
0.1875
0.6875
0.4375
0.9375
ADC LINEARITY ERROR
vs. FULL-SCALE INPUT VOLTAGE
0.15
M
FULL-SCALE INPUT VOLTAGE
L
-0.15
0.05
-0.05
AIN1
AIN2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX849ESE | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1-3 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX849ESE+ | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1-3 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX849ESE+T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1-3 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX849ESE-T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1-3 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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 |
| MAX849EVKIT | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 1-Cell to 3-Cell High-Power Low-Noise Step-Up DC-DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)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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