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参数资料
| 型号： | MAX1844ETP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 20-TQFN |
| 标准包装： | 60 |
| 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： | 管件 |
High-Speed Step-Down Controller with
Accurate Current Limit for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +28V
V CC , V DD to GND .....................................................-0.3V to +6V
OUT, PGOOD, SHDN to GND ..................................-0.3V to +6V
FB, ILIM, LATCH , OVP, REF, SKIP ,
TON, UVP to GND ..................................-0.3V to (V CC + 0.3V)
BST to GND ............................................................-0.3V to +34V
CS to GND.................................................................-6V to +30V
DL to GND ..................................................-0.3V to (V DD + 0.3V)
DH to LX .....................................................-0.3V to (BST + 0.3V)
REF Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (T A = +70 ° C)
20-Pin QSOP (derate 9.1mW/ ° C above +70 ° C)...........727mW
20-Pin 5mm ? 5mm QFN (derate 20.0mW/ ° C
above +70 ° C).................................................................1.60W
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
LX to BST..................................................................-6V to +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.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, V CC = V DD = 5V, SKIP = GND, T A = 0 ° C to +85 ° C , unless otherwise noted. Typical values are at
T A = +25 ° C.)
PARAMETER
Input Voltage Range
Battery voltage, V+
V CC , V DD
CONDITIONS
MIN
2
4.5
TYP
MAX
28
5.5
UNITS
V
Error Comparator Threshold
(DC Output Voltage Accuracy)
(Note 1)
V+ = 4.5V to 28V,
SKIP = V CC
FB = OUT
FB = GND
FB = V CC
0.99
2.475
1.782
2.5
1.8
1.01
2.525
1.818
V
Load Regulation Error
Line Regulation Error
FB Input Bias Current
Output Adjustment Range
I LOAD = 0 to 3A, SKIP = V CC
V CC = 4.5V to 5.5V, V+ = 4.5V to 28V
-0.1
1
9
5
+0.1
5.5
mV
mV
μA
V
OUT Input Resistance
Soft-Start Ramp Time
FB = GND
FB = V CC or adjustable feedback mode
Rising edge of SHDN to full current limit
TON = GND (600kHz)
90
70
140
190
145
1.7
160
350
270
180
k ?
ms
On-Time
V+ = 24V,
V OUT = 2V
(Note 2)
TON = REF (450kHz)
TON = unconnected (300kHz)
175
260
200
290
225
320
ns
TON = V CC (200kHz)
380
425
470
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+)
(Note 2)
FB forced above the regulation point
FB forced above the regulation point
SHDN = GND
SHDN = GND
SHDN = GND, V+ = 28V, V CC = V DD = 0 or 5V
400
550
<1
25
<1
<1
<1
500
800
5
40
5
5
5
ns
μA
μA
μA
μA
μA
μA
Reference Voltage
Reference Load Regulation
V CC = 4.5V to 5.5V, no external REF load
I REF = 0 to 50μA
1.98
2.00
2.02
0.01
V
V
2
_______________________________________________________________________________________
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相关代理商/技术参数 |
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| MAX1844ETP+ | 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 |
| MAX1844ETP+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 |
| MAX1844ETP-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 |
| 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 |
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