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参数资料
| 型号： | MAX1844ETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 20-TQFN |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 600kHz |
| 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： | 20-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
High-Speed Step-Down Controller with
Accurate Current Limit for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V CC = V DD = 5V, SKIP = GND, T A = -40 ° C to +85 ° C , unless otherwise noted.) (Note 3)
PARAMETER
Minimum Off-Time
Quiescent Supply Current (V CC )
Quiescent Supply Current (V DD )
Quiescent Supply Current (V+)
Shutdown Supply Current (V CC )
Shutdown Supply Current (V DD )
Shutdown Supply Current (V+)
Reference Voltage
Overvoltage Trip Threshold
(Fixed-Threshold Mode)
Overvoltage Comparator Offset
(Adjustable-Threshold Mode)
PGOOD Trip Threshold (Lower)
PGOOD Trip Threshold (Upper)
PGOOD Output Low Voltage
PGOOD Leakage Current
Current-Limit Threshold (Fixed)
Current-Limit Threshold
(Adjustable)
V CC Undervoltage
Lockout Threshold
CONDITIONS
(Note 2)
FB forced above the regulation point
FB forced above the regulation point
Measured at V+
SHDN = GND
SHDN = GND
SHDN = GND, V+ = 28V, V CC = V DD = 0 or 5V
V CC = 4.5V to 5.5V, no external REF load
With respect to error comparator threshold, no load
OVP = GND, rising edge, hysteresis = 1%
External feedback, measured at FB with respect to
V OVP , 1V < V OVP 1.8V, rising edge, hysteresis = 1%
Internal feedback, measured at OUT with respect to the
nominal OUT regulation voltage, 1V < V OVP < 1.8V
With respect to error comparator threshold, no load
OUT falling edge, hysteresis = 1%
With respect to error comparator threshold, no load
OUT rising edge, hysteresis = 1%
I SINK = 1mA
High state, forced to 5.5V
GND - V CS , ILIM = V CC
GND - V CS , V ILIM = 0.5V
GND - V CS , V ILIM = 2V
Rising edge, hysteresis = 20mV,
PWM disabled below this level
MIN
1.98
12
-30
-3.5
-12.5
7.5
85
35
160
4.1
TYP
MAX
500
800
5
40
5
5
5
2.02
17
+30
+3.5
-7.5
12.5
0.4
1
115
65
240
4.4
UNITS
ns
μA
μA
μA
μA
μA
μA
V
%
mV
%
%
%
V
μA
mV
mV
V
Logic Input High Voltage
Logic Input Low Voltage
LATCH , SHDN , SKIP
LATCH , SHDN , SKIP
2.4
0.8
V
V
Logic Input Current
LATCH , SHDN , SKIP
-1
1
μA
Note 1: When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error com-
parator threshold by 50% of the ripple. In discontinuous conduction ( SKIP = GND, light load), the output voltage will have a
DC regulation level higher than the trip level by approximately 1.5% due to slope compensation.
Note 2: On-time and off-time specifications are measured from 50% point to 50% point at the DH pin with LX = GND, V BST = 5V,
and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching speeds.
Note 3: Specifications to -40 ° C are guaranteed by design, not production tested.
Note 4: Production testing limitations due to package handling require relaxed maximum on-resistance specifications for the QFN
package. The MAX1844EEP, MAX1844EGP, and MAX1844ETP contain the same die and the QFN package imposes no
additional resistance in-circuit.
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1844EVKIT | 功能描述:电源管理IC开发工具 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 |
| MAX1845EEI | 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 |
| MAX1845EEI+ | 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 |
| MAX1845EEI+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 |
| MAX1845EEI-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 |
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