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| 型號(hào)： | MAX849 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類(lèi)： | 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)： | 3/16頁(yè) |
| 文件大小： | 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
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= 3.6V, GND = PGND = CLK/SEL = ON1 =
ON2
= AINSEL = AIN1 = AIN2 = FB = POKIN, POUT = OUT,
T
A
= 0°C to +85°C
,
unless otherwise noted.)
Input Low Voltage
1.2V < V
OUT
< 5.5V, ON1 and
ON2
(Note 8)
V
OUT
= 2.7V, AINSEL and CLK/SEL
1.2V < V
OUT
< 5.5V, ON1 and
ON2
(Note 8)
V
OUT
= 5.5V, AINSEL and CLK/SEL
ON1,
ON2
, AINSEL and CLK/SEL
CLK/SEL = OUT
0.2V
OUT
0.2V
OUT
Accuracy
V
Current into OUT pin, CLK/SEL = GND
f
CLK
= 400kHz, 5ms conversion,
monotonic to 8 bits
±4
% FSR
Internal Trip Level
External Trip Level
μA
Rising V
OUT
, V
POKIN
< 0.1V
Rising V
POKIN
I
SINK
= 1mA, V
OUT
= 3.6V or
I
SINK
= 20μA, V
OUT
= 1V
V
OUT
= V
POK
= 5.5V
V
POKIN
= 1.5V
2.95
1.225
3.10
1.275
V
V
Input High Voltage
μA
1
2
f
CLK
= 400kHz, V
AIN1
= V
AIN2
= 2.5V
AIN1, AIN2 Input Current
V
0
2.5
AINSEL = OUT
AIN2 Input Range
V
0.625
1.875
AINSEL = GND
AIN1 Input Range
V
V
OUT
- 0.4
Data Output Voltage High
V
0.4
I
SOURCE
= 1mA
Data Output Voltage Low
I
SINK
= 1mA
POK Low Voltage
0.4
V
POK High Leakage Current
POKIN Leakage Current
LOGIC AND CONTROL INPUTS
0.8V
OUT
0.8V
OUT
0.01
1
μA
nA
V
50
35
90
Operating Current in Low-Power
Mode (Note 6)
Logic Input Current
Internal Oscillator Frequency
Oscillator Maximum Duty Cycle
External Clock Frequency Range
CLK/SEL Pulse Width
CLK/SEL Rise/Fall Time
1
μA
kHz
%
kHz
ns
ns
260
80
200
200
300
85
340
90
400
Not tested
Not tested
100
Current into OUT pin, CLK/SEL = OUT,
does not include switching losses
μA
150
300
UNITS
MIN
TYP
MAX
CONDITIONS
PARAMETER
Operating Current in Low-Noise
Mode (Note 6)
V
LX
= 0V, V
ON2
= V
OUT
= 5.5V
V
LX
= V
ON2
= V
OUT
= 5.5V
μA
μA
0.1
0.1
0.3
0.13
0.25
0.3
1350
200
400
20
20
0.6
0.25
0.5
0.6
1600
300
550
POUT Leakage Current
LX Leakage Current
N-channel
CLK/SEL = GND
CLK/SEL = OUT
CLK/SEL = OUT
MAX848
MAX849
MAX848
MAX849
P-channel
Switch On-Resistance
CLK/SEL = OUT
1100
120
250
V
CLK/SEL
= 0V (Note 7)
mA
N-Channel Current Limit
DC-DC SWITCHES
ADC
POWER-GOOD
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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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