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参数资料
| 型号： | MAX1845ETX+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/27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
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)
PARAMETER
Current-Limit Threshold
(Adjustable)
V CC Undervoltage Lockout
Threshold
SYMBOL
CONDITIONS
AGND - V CS _, ILIM_ = 0.5V
AGND - V CS _, ILIM_ = 1V
Rising edge, hysteresis = 20mV, PWMs
disabled below this level
MIN
35
80
4.05
TYP
MAX
65
120
4.4
UNITS
mV
V
ON_, SKIP
2.4
Logic Input High Voltage
Logic Input Low Voltage
V IH
V IL
UVP
ON_, SKIP
UVP
V CC -
0.4
0.8
0.05
V
V
Logic Input Current
TON (AGND or V CC )
ON_, SKIP , UVP
-3
-1
3
1
μA
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.
__________________________________________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.)
FREQUENCY vs. INPUT VOLTAGE
400
FREQUENCY vs. LOAD CURRENT
400
(TON = FLOAT, SKIP = V CC )
350
300
250
200
150
100
50
0
OUT1, SKIP = V CC
OUT2, SKIP = V CC
OUT1, SKIP = GND
OUT2, SKIP = GND
350
300
250
200
150
100
50
0
OUT1
OUT2
I OUT1 = 8A
I OUT2 = 4A
0.01
0.1
1
10
4
8
12
16
20
21
LOAD CURRENT (A)
INPUT VOLTAGE (V)
6
_______________________________________________________________________________________
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相关代理商/技术参数 |
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| 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 |
| MAX1846EUB | 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 |
| MAX1846EUB+ | 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 |
| 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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