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參數(shù)資料
| 型號(hào)： | MAX1845 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
| 中文描述： | 雙路、高效率、降壓型控制器，帶有精確限流 |
| 文件頁數(shù)： | 2/27頁 |
| 文件大?。?/td> | 543K |
| 代理商： | MAX1845 |
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M
Dual, High-Efficiency, Step-Down
Controller with Accurate Current Limit
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS (Note 1)
V+ to AGND..............................................................-0.3 to +30V
V
CC
to AGND............................................................-0.3V to +6V
V
DD
to PGND............................................................-0.3V to +6V
AGND to PGND.....................................................-0.3V to +0.3V
PGOOD, OUT_ to AGND..........................................-0.3V to +6V
OVP, UVP, ILIM_, FB_, REF,
SKIP
, TON, ON_ to AGND......................-0.3V to (V
CC
+ 0.3V)
DL_ to PGND..............................................-0.3V to (V
DD
+ 0.3V)
BST_ to AGND........................................................-0.3V to +36V
CS_ to AGND.............................................................-6V to +30V
DH1 to LX1 ..............................................-0.3V to (V
BST1
+ 0.3V)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
LX_ to BST_..............................................................-6V to +0.3V
DH2 to LX2 ..............................................-0.3V to (V
BST2
+ 0.3V)
REF Short Circuit to GND...........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
28-Pin QSOP (derate 10.8mW/°C above +70°C)........860mW
36-Pin 6mm
6mm Thin QFN
(derate 26.3mW/°C above +70°C).............................2105mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V
DD
= V
CC
= 5V,
SKIP
= AGND, V+ = 15V,
T
A
= 0
°
C to +85
°
C
, typical values are at +25°C, unless otherwise
noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PWM CONTROLLERS
V+
Battery voltage, V+
V
CC
, V
DD
2
28
5.5
1.818
1.515
1.01
1.827
1.523
1.015
Input Voltage Range
V
CC
/V
DD
4.5
1.782
1.485
0.99
1.773
1.477
0.985
V
FB1 to AGND
FB1 to V
CC
FB1 to OUT1
FB1 to AGND
FB1 to V
CC
FB1 to OUT1
1.8
1.5
1
1.8
1.5
1
V+ = 2V to 28V, I
LOAD
= 0 to 8A,
SKIP
= V
CC
,
+25
°
C to +85
°
C
DC Output Voltage OUT1
(Note 2)
V
OUT1
V+ = 2V to 28V, I
LOAD
= 0 to 8A,
SKIP
= V
CC
,
0
°
C to +85
°
C
V
FB2 to AGND
2.475
2.5
2.525
V+ = 4.5V to 28V,
I
LOAD
= 0 to 4A,
SKIP
= V
CC
,
+25
°
C to +85
°
C
FB2 to OUT2
0.99
1
1.01
FB2 to AGND
2.463
2.5
2.537
DC Output Voltage OUT2
(Note 2)
V
OUT2
V+ = 4.5V to 28V,
I
LOAD
= 0 to 4A,
SKIP
= V
CC
,
0
°
C to +85
°
C
FB2 to OUT2
0.985
1
1.015
V
Output Voltage Adjust Range
Dual-Mode Threshold, Low
OUT1, OUT2
OVP, FB_
1
5.5
0.15
V
V
0.05
0.1
OVP, ILIM_
V
CC
-
1.5
V
CC
-
0.4
Dual-Mode Threshold, High
FB1
V
OUT1
= 1.5V
V
OUT2
= 2.5V
1.9
75
100
-0.1
2.0
2.1
V
R
OUT1
R
OUT2
I
FB
OUT_ Input Resistance
k
FB_ Input Bias Current
Soft-Start Ramp Time
0.1
μA
μs
Zero to full ILIM
1700
Note 1:
For the MAX1845EEI, AGND and PGND refer to a single pin designated GND.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1845EEI | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
| MAX1845ETX | Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit |
| MAX1848 | Replaced by TMS320VC5506 : DSP (DSP Only) for Embedded V90 Modem Solution [Not Recommended For New Designs (NRND)] 144-LQFP |
| MAX1848ETA | Replaced by TMS320VC5506 : DSP (DSP Only) for Embedded V90 Modem Solution [Not Recommended For New Designs (NRND)] 144-BGA MICROSTAR |
| MAX1848EKA | White LED Step-Up Converter in SOT23 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1845EEI | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1845EEI+ | 功能描述:電流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1845EEI+T | 功能描述:電流型 PWM 控制器 Step-Down Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1845EEI-T | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX1845EEI-TG05 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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