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| 型号： | MAX1644EAE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 16SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.1 V ~ 5.5 V |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 最高 350kHz |
| 电流 - 输出： | 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： | 16-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SSOP |
2A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V CC = +3.3V, FBSEL = GND, T A = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
Undervoltage Lockout
Threshold
FB Input Bias Current
SYMBOL
V UVLO
I FB
CONDITIONS
V IN falling, hysteresis = 40mV
V FB = 1.2V
MIN
2.5
0
TYP
2.6
80
MAX
2.7
200
UNITS
V
nA
R TOFF = 150k Ω
1.13
1.33
1.53
Off-Time Default Period
t OFF
R TOFF = 30.1k Ω
0.20
0.33
μs
R TOFF = 499k Ω
4.3
5.6
Off-Time Start-Up Period
On-Time Period
t OFF
t ON
FB = GND
0.4
4 · t OFF
μs
μs
SS Source Current
SS Sink Current
I SS
I SS
V SS = 1V
3.5
100
5
6.5
μA
μA
SHDN Input Current
I SHDN
V SHDN = 0 to V CC
-0.5
0.5
μA
SHDN Input Low Threshold
SHDN Input High Threshold
V IL
V IH
2.0
0.8
V
V
FBSEL Input Current
FBSEL = GND
FBSEL = REF
-5
0.9
+5
0.2
1.3
μA
FBSEL Logic Thresholds
FBSEL = unconnected
0.7 · V CC
- 0.2
0.7 · V CC
+ 0.2
V
FBSEL = V CC
V CC - 0.2
Maximum Output RMS
Current
5.8
A RMS
ELECTRICAL CHARACTERISTICS
(V IN = V CC = +3.3V, FBSEL = GND, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)
PARAMETER
Input Voltage
Preset Output Voltage
SYMBOL
V IN
V OUT
CONDITIONS
V IN = V CC = 4V to 5.5V,
I LOAD = 0 to 2A, FBSEL = unconnected
V FB = V OUT V IN = 3V to 5.5V, FBSEL = V CC
MIN
3.0
3.276
2.48
TYP
MAX
5.5
3.390
2.57
UNITS
V
V
V IN = 3V to 5.5V, FBSEL = REF
1.08
1.12
Adjustable Output Voltage
Reference Voltage
V REF
V IN = 3.0V to 5.5V, I LOAD = 0,
FBSEL = GND or REF
V REF
1.08
V IN
1.12
V
V
PMOS Switch
On-Resistance
NMOS Switch
On-Resistance
R ON, P
R ON, N
I LX = 0.5A
I LX = 0.5A
V IN = 4.5V
V IN = 3V
V IN = 4.5V
V IN = 3V
150
200
150
200
m Ω
m Ω
Current-Limit Threshold
Idle Mode Current
Threshold
No-Load Supply Current
I LIMIT
I IM
I IN + I CC
V FB = 1.2V
2.3
0.2
3.5
0.7
360
A
A
μA
FB Input Bias Current
Off-Time Default Period
I FB
t OFF
V FB = 1.2V
R TOFF = 150k Ω
0
1.03
250
1.63
nA
μs
Note 2: Recommended operating frequency, not production tested.
Note 3: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
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