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| 型号： | MAX1623EAP+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 3A 20SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 66 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.1 V ~ 3.8 V |
| 输入电压： | 4.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 最高 350kHz |
| 电流 - 输出： | 3A |
| 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： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 20-SSOP |
| 产品目录页面： | 1410 (CN2011-ZH PDF) |
3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
ABSOLUTE MAXIMUM RATINGS
IN to PGND .....................................................................0V to 6V
V CC to GND ................................................................-0.3V to 6V
PGND to GND.....................................................................±0.5V
IN to V CC .............................................................................±0.5V
LX Current (Note 1).............................................................±5.5A
SHDN to GND .............................................................-0.3V to 6V
REF, FBSEL, COMP, FB, TOFF to GND .....-0.3V to (V CC + 0.3V)
REF Short to GND ......................................................Continuous
Continuous Power Dissipation (T A = +70°C) (with part mounted
on 1 sq. inch of one ounce copper)
20-Pin SSOP (derate 22mW/°C above +70°C) ................1.3W
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed
the IC’s package power dissipation limits.
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 = V CC = 5V, FBSEL unconnected, R TOFF = 110k ? , T A = 0°C to +85°C , unless otherwise noted. Typical values are at
T A = +25°C.)
PARAMETER
Input Voltage Range
CONDITIONS
FBSEL = unconnected
MIN
4.5
3.296
TYP
3.330
MAX
5.5
3.366
UNITS
V
Output Voltage
V IN = 4.5V to 5.5V,
I LOAD = 0 to 3A
FBSEL = V CC
FBSEL = GND or REF
2.49
1.089
2.525
1.100
2.550
1.110
V
Output Adjustment Range
FBSEL = GND or REF (Note 2)
V REF
3.80
V
Reference Output Voltage
I REF = 0
1.089
1.100
1.110
V
Reference Load Regulation
Current-Limit Threshold
RMS LX Output Current
I REF = -1μA to 10μA
3.65
1
4.65
3.65
mV
A
A
PMOS Switch On-Resistance
NMOS Switch On-Resistance
Maximum Switching Frequency
Idle Mode Threshold (Note 3)
No-Load Supply Current
Shutdown Supply Current
LX Leakage Current
Thermal Shutdown Threshold
V IN = 4.5V
V IN = 4.5V
I LOAD ≥ 1.5A (Note 2)
Does not include switching losses
SHDN = GND
V IN = 5.5V, V LX = 5.5V or 0
1
55
60
1.25
400
0.5
145
100
100
350
1.5
525
10
±20
m ?
m ?
kHz
A
μA
μA
μA
°C
Undervoltage Lockout Threshold
FB Input Bias Current
Error-Amplifier Gain Bandwidth
Off-Time Adjustment Range
Off-Time Default Period
AC Output Load Regulation
SHDN Input Current
V CC falling, 100mV hysteresis
FBSEL = GND, adjustable output mode, V FB = 1.2V
(Note 2)
FBSEL = GND
FBSEL = REF
SHDN = GND or V CC
4.1
-25
500
0.5
0.85
-1
4.2
1.00
1
2
0.03
4.3
25
4
1.15
1
V
nA
kHz
μs
μs
%
μA
SHDN Input Low Voltage
SHDN Input High Voltage
2
0.8
V
V
2
_______________________________________________________________________________________
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