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| 型号： | MAX1774EEI+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/21页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 28QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 1 V ~ 5.5 V |
| 输入电压： | 2.7 V ~ 28 V |
| 频率 - 开关： | 1.25MHz |
| 电流 - 输出： | 1.5A，2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 28-QSOP |
Dual, High-Efficiency, Step-Down
Converter with Backup Battery Switchover
ABSOLUTE MAXIMUM RATINGS
IN, SHDNM , MDRV , DBI, LBI, ACI,
CVH to GND .......................................................-0.3V to +30V
IN to CVH, PDRV ......................................................-0.3V to +6V
BIN to CS-.................................................................-0.3V to +6V
LXB to GND ................................................-0.3V to (V BIN + 0.7V)
PDRV to GND..................................(V CVH - 0.3V) to (V IN + 0.3V)
All Other Pins to GND...............................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
Continuous Power Dissipation
28-Pin QSOP (derate 10.8mW/°C above +70°C)........860mW
32-Pin QFN (derate 23.2mW/°C above +70°C) ........1860mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Temperature (soldering, 10s) ..........................................+300°C
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
(Figure 1, V IN = V INS +12V, V INC = V CS- = V CS+ = +3.3V, V CORE = +1.8V, T A = 0°C to +85°C, unless otherwise noted. Typical values are at
T A = +25°C.)
PARAMETER
Input Voltage
Input Quiescent Supply Current
CS- Quiescent Supply Current
Core Regulator Quiescent
Supply Current
Backup Mode BIN Quiescent
Supply Current
IN Shutdown Supply Current
SYMBOL
V IN
I IN
I CS-
I INC
I BIN
CONDITIONS
V FBM = +1.5V, V FBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
V FBM = +1.5V, V FBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
V FBM = +1.5V, V FBC = +1.5V,
V SHDNM = V SHDNC = +3.3V
V BIN = +3.3V, CS- open
V FBM = +1.5V, V SHDNM = +3.3V,
V BKOFF = +1.5V, SHDNC = GND
SHDNM = SHDNC = GND
MIN
2.7
TYP
18
110
60
60
8
MAX
28
40
220
105
105
40
UNITS
V
μA
μA
μA
μA
μA
MAIN REGULATOR
Main Output Voltage Adjust
Range
1.25
5.5
V
FBM Regulation Threshold
FBM Input Current
Current-Limit Threshold
Minimum Current-Limit
Threshold
Valley Current Threshold
Zero Current Threshold
PDRV, NDRV Gate Drive
Resistance
CS- to CVL Switch Resistance
V FBM
I FBM
V (CS+ - CS-) = 0 to +60mV,
V IN = +3.5V to +28V
V FBM = +1.3V
V CS+ - V CS-
V CS+ - V CS-
V CS+ - V CS-
V CS+ - V CS-
V CS- = +3.3V, I PDRV , I NDRV = 50mA
I CVL = 50mA
1.21
-0.1
60
5
40
0
1.25
80
15
50
5
2
4.5
1.29
0.1
100
25
60
15
5.5
9.5
V
μA
mV
mV
mV
mV
?
?
PDRV, NDRV Dead Time
50
ns
2
_______________________________________________________________________________________
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