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参数资料
型号： MAX1845ETX
厂商： MAXIM INTEGRATED PRODUCTS INC
元件分类： 稳压器
英文描述： Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit
中文描述： DUAL SWITCHING CONTROLLER, 620 kHz SWITCHING FREQ-MAX, QCC36
封装： 6 X 6 MM, 0.80 MM, MO220WJJD-1, TQFN-36
文件页数： 6/27页
文件大小： 543K
代理商： MAX1845ETX
M
Dual, High-Efficiency, Step-Down
Controller with Accurate Current Limit
6
_______________________________________________________________________________________
0
0.01
10
1
0.1
LOAD CURRENT (A)
300
350
400
200
250
100
150
50
M
F
FREQUENCY vs. LOAD CURRENT
OUT1, SKIP = V
CC
OUT2, SKIP = V
CC
OUT1, SKIP = GND
OUT2, SKIP = GND
0
50
100
150
200
250
300
350
400
4
8
12
16
20
21
M
INPUT VOLTAGE (V)
F
FREQUENCY vs. INPUT VOLTAGE
(TON = FLOAT, SKIP = V
CC
)
OUT1
OUT2
I
OUT1
= 8A
I
OUT2
= 4A
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, components from Table 1, V
IN
= 15V,
SKIP
= GND, TON = unconnected, T
A
= +25
°
C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
DD
= V
CC
= 5V,
SKIP
= AGND, V+ = 15V,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 5)
Note 2:
When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error compara-
tor threshold by 50% of the output voltage ripple. In discontinuous conduction (
SKIP
= AGND, light load), the output voltage will
have a DC regulation higher than the error-comparator threshold by approximately 1.5% due to slope compensation.
Note 3:
On-time and off-time specifications are measured from 50% point to 50% point at DH_ with LX_ = GND, BST_ = 5V, and a
250pF capacitor connected from DH_ to LX_. Actual in-circuit times may differ due to MOSFET switching speeds.
Note 4:
Production testing limitations due to package handling require relaxed maximum on-resistance specifications for the QFN
package. The MAX1845EEI and MAX1845ETX contain the same die, and the QFN package imposes no additional resis-
tance in-circuit.
Note 5:
Specifications to -40
°
C are guaranteed by design, not production tested.
PARAMETER
SYMBOL
CONDITIONS
MIN
35
80
TYP
MAX
65
120
UNITS
AGND - V
CS
_, ILIM_ = 0.5V
AGND - V
CS
_, ILIM_ = 1V
Rising edge, hysteresis = 20mV, PWMs
disabled below this level
Current-Limit Threshold
(Adjustable)
mV
V
CC
Undervoltage Lockout
Threshold
4.05
4.4
V
ON_,
SKIP
2.4
Logic Input High Voltage
V
IH
UVP
V
CC
-
0.4
V
ON_,
SKIP
UVP
TON (AGND or V
CC
)
ON_,
SKIP
, UVP
0.8
0.05
3
1
Logic Input Low Voltage
V
IL
V
-3
-1
Logic Input Current
μA
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相关代理商/技术参数
参数描述
MAX1845ETX+ 功能描述:电流型 PWM 控制器 Step-Down 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
MAX1845ETX+T 功能描述:电流型 PWM 控制器 Step-Down 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
MAX1845ETX-T 功能描述:电流型 PWM 控制器 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
MAX1845ETX-TG068 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1845EVKIT 功能描述:电源管理IC开发工具 Evaluation Kit for the MAX1845 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
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