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| 型号： | MAX8640ZEXT19+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.9V .5A SC70-6 |
| 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： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.9V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 4MHz |
| 电流 - 输出： | 500mA |
| 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： | 6-TSSOP，SC-88，SOT-363 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SC-70-6 |
Tiny 500mA, 4MHz/2MHz Synchronous
Step-Down DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +6V
OUT, SHDN to GND ....................................-0.3V to (V IN + 0.3V)
LX Current (Note 1) ........................................................0.8A RMS
OUTPUT Short Circuit to GND ...................................Continuous
Continuous Power Dissipation (T A = +70°C)
6-Pin μDFN (derate 2.1mW/°C above +70°C) ..............167.7mW
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
6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW
Note 1: LX has internal clamp diodes to IN and GND. Applications that forward bias these diodes should not exceed the IC’s package
power-dissipation limit.
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
(V IN = 3.6V, SHDN = IN, T A = -40°C to +85°C, typical values are at T A = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Supply Range
UVLO Threshold
SYMBOL
V IN
UVLO
CONDITIONS
V IN rising, 100mV hysteresis
MIN
2.7
2.44
TYP
2.6
MAX
5.5
2.70
UNITS
V
V
No load, no switching
28
48
Supply Current
Output Voltage Range
I CC
V OUT
SHDN = GND
Factory preset
T A = +25°C
T A = +85°C
0.8
0.01
0.1
0.1
2.5
μA
V
Output Voltage Accuracy
(Falling Edge)
Output Load Regulation
(Voltage Positioning)
I LOAD = 0mA, T A = +25°C
I LOAD = 0mA, T A = -40°C to +85°C
Equal to inductor DC resistance
-1
-2
0
R L
+1
+2
%
V/A
SHDN Logic Input Level
V IH
V IL
V IN = 2.7V to 5.5V
V IN = 2.7V to 5.5V
1.4
0.4
V
SHDN Logic Input Bias Current
Peak Current Limit
Valley Current Limit
Rectifier Off-Current Threshold
I IH,IL
I LIMP
I LIMN
I LXOFF
V IN = 5.5V,
SHDN = GND or IN
pFET switch
nFET rectifier
nFET rectifier
T A = +25°C
T A = +85°C
590
450
10
0.001
0.01
770
650
40
1
1400
1300
70
μA
mA
mA
mA
On-Resistance
R ONP
R ONN
pFET switch, I LX = -40mA
nFET rectifier, I LX = 40mA
0.6
0.35
1.2
0.7
Ω
LX Leakage Current
I LXLKG
V IN = 5.5V, LX = GND
to IN, SHDN = GND
T A = +25°C
T A = +85°C
0.1
1
1
μA
Minimum On and Off Times
Thermal Shutdown
Thermal-Shutdown Hysteresis
t ON(MIN)
t OFF(MIN)
95
95
+160
20
ns
°C
°C
Note 2: All devices are 100% production tested at T A = +25°C. Limits over the operating temperature range are guaranteed by design.
2
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