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参数资料
| 型号： | MAX8855ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 5A DL 32TQFN |
| 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： | 0.6 V ~ 3.24 V |
| 输入电压： | 2.35 V ~ 3.6 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 1MHz ~ 2MHz |
| 电流 - 输出： | 5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
Dual, 5A, 2MHz Step-Down Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V IN_ = V VDD = V VDL = 3.3V, V FB_ = 0.5V, V SS_ = V REFIN = 600mV, PGND_ = GND, R FSYNC = 10k Ω , L = 0.47μH, C BST_ = 0.1μF,
C SS_ = 0.022μF, PWRGD_ not connected; T A = -40°C to +85°C, typical values are at T A = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
ERROR AMPLIFIER
V VDD = V IN _ = 2.5V to
FB_ Regulation Voltage
V COMP _ = 1V to
2V
3.3V (MAX8855)
V VDD = V IN _ = 2.25V to
0.594
0.600
0.606
V
3.3V (MAX8855A)
V VDD = V IN _ = 2.5V to
FB_ Regulation Voltage with External
Reference
V COMP _ = 1V to
2V
3.3V (MAX8855)
V VDD = V IN _ = 2.25V to
0.594
0.600
0.606
V
3.3V (MAX8855A)
Error Amplifier Common-Mode-Input Range
Error Amplifier Maximum Output Current
0
1
V VDD -
1.6
V
mA
FB_ Input Bias Current
V FB _ = 0.605V
T A = +25°C
T A = +85°C
40
37
300
nA
REFIN, SS2
REFIN Input Bias Current
REFIN Common-Mode Range
V FB_ = 0.610V
MAX8855
MAX8855A
T A = +25 ° C
T A = +85 ° C
V VDD = 2.35V to 2.6V
V VDD = 2.25V to 2.6V
0
90
65
500
V VDD -
1.65
nA
V
LX1, LX2 (ALL PINS COMBINED)
V VDD = 2.6V to 3.6V
0
V VDD -
1.70
LX_ On-Resistance, High
LX_ On-Resistance, Low
I LX_ = -2A
I LX_ = -2A
V IN _ = V BST _ - V LX _ = 3.3V
V IN _ = V BST _ - V LX _ = 2.5V
V IN _ = 3.3V
V IN _ = 2.5V
31
34
27
29
52
46
m Ω
m Ω
LX_ Current-Limit Threshold
High-side sourcing and freewheeling
7.0
8.3
9.6
A
LX_ Leakage Current
V IN _ = 3.6V,
V EN _ = 0V
V LX_ = 3.6V
V LX_ = 0V
T A = +25 ° C
T A = +85 ° C
T A = +25 ° C
T A = +85 ° C
-10
-0.1
-0.1
+0.1
μA
LX_ Switching Frequency
R FSYNC = 10k Ω
R FSYNC = 4.75k Ω
0.9
1.80
1.0
2.0
1.1
2.2
MHz
LX_ Minimum Off-Time
LX_ Minimum On-Time
50
95
ns
ns
LX_ Maximum Duty Cycle
Maximum LX_ Output Current
R FSYNC = 10k Ω
90
3
95
%
A RMS
_______________________________________________________________________________________
3
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