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| 型号： | MAX1845ETX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/27页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 36-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 540kHz |
| 电源电压： | 4.5 V ~ 5.5 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 36-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
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Dual, High-Efficiency, Step-Down
Controller with Accurate Current Limit
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)
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
Note 1: For the MAX1845EEI, AGND and PGND refer to a single pin designated GND.
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.
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
Input Voltage Range
V+
V CC /V DD
Battery voltage, V+
V CC , V DD
V+ = 2V to 28V, I LOAD
= 0 to 8A, SKIP = V CC ,
FB1 to AGND
FB1 to V CC
2
4.5
1.782
1.485
1.8
1.5
28
5.5
1.818
1.515
V
DC Output Voltage OUT1
(Note 2)
V OUT1
+25°C to +85°C
V+ = 2V to 28V, I LOAD
FB1 to OUT1
FB1 to AGND
0.99
1.773
1
1.8
1.01
1.827
V
= 0 to 8A, SKIP = V CC ,
0°C to +85°C
V+ = 4.5V to 28V,
I LOAD = 0 to 4A,
FB1 to V CC
FB1 to OUT1
FB2 to AGND
1.477
0.985
2.475
1.5
1
2.5
1.523
1.015
2.525
DC Output Voltage OUT2
(Note 2)
V OUT2
SKIP = V CC ,
+25°C to +85°C
V+ = 4.5V to 28V,
I LOAD = 0 to 4A,
FB2 to OUT2
FB2 to AGND
0.99
2.463
1
2.5
1.01
2.537
V
SKIP = V CC ,
0°C to +85°C
FB2 to OUT2
0.985
1
1.015
Output Voltage Adjust Range
OUT1, OUT2
1
5.5
V
Dual-Mode Threshold, Low
Dual-Mode Threshold, High
OUT_ Input Resistance
FB_ Input Bias Current
Soft-Start Ramp Time
R OUT1
R OUT2
I FB
OVP, FB_
OVP, ILIM_
FB1
V OUT1 = 1.5V
V OUT2 = 2.5V
Zero to full ILIM
0.05
V CC -
1.5
1.9
75
100
-0.1
0.1
2.0
1700
0.15
V CC -
0.4
2.1
0.1
V
V
k Ω
μA
μs
2
_______________________________________________________________________________________
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| MAX1846EUB+T | 功能描述:电流型 PWM 控制器 Current-Mode Invert PWM Controller RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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