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| 型号： | MAX1644EAE-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/11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
Typical Operating Characteristics
(Circuit of Figure 1, T A = +25°C, unless otherwise noted.)
DC LOAD-REGULATION ERROR
100
EFFICIENCY vs. OUTPUT CURRENT
100
EFFICIENCY vs. OUTPUT CURRENT
0
vs. OUTPUT CURRENT
90
90
-0.1
A
B
80
70
60
50
V IN = 5V, V OUT = 3.3V,
L = 6.0 μ H, R TOFF = 120k Ω
80
70
60
50
V IN = 5V, V OUT = 1.5V,
L = 6.0 μ H, R TOFF = 270k Ω
-0.2
-0.3
-0.4
-0.5
D
E
C
40
30
20
10
0
40
30
20
10
0
V IN = 3.3V, V OUT = 1.5V,
L = 4.7 μ H, R TOFF = 200k Ω
-0.6
-0.7
-0.8
-0.9
-1.0
0.001
0.01
0.1
1
10
0.001
0.01
0.1
1
10
0.0001
0.001
0.01
0.1
1
10
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
350
300
250
200
150
100
SWITCHING FREQUENCY
vs. OUTPUT CURRENT
V IN = 5V,
V OUT = 3.3V,
L = 6.0 μ H, V IN = 3.3V,
R TOFF = 120k Ω V OUT = 1.5V,
V IN = 5V, L = 4.7 μ H,
V OUT = 1.5V, R TOFF = 200k Ω
L = 6.0 μ H,
R TOFF = 270k Ω
4.5
4.0
3.5
3.0
2.5
2.0
1.5
OFF-TIME vs. R TOFF
A: V IN = 3.3V, V OUT = 1.5V, L = 4.7 μ H,
R TOFF = 200k Ω , FBSEL = GND
B: V IN = 3.3V, V OUT = 1.5V, L = 4.7 μ H,
R TOFF = 200k Ω , FBSEL = REF
C: V IN = 5V, V OUT = 3.3V, L = 6.0 μ H,
R TOFF = 120k Ω , FBSEL = OPEN
D: V IN = 5V, V OUT = 1.5V, L = 6.0 μ H,
R TOFF = 270k Ω , FBSEL = GND
E: V IN = 5V, V OUT = 1.5V, L = 6.0 μ H,
R TOFF = 270k Ω , FBSEL = REF
1.0
50
0.5
0
0
0.5
1.0
1.5
2.0
0
0
100
200
300
400
500
600
OUTPUT CURRENT (A)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
R TOFF (k Ω )
STARTUP AND
SHUTDOWN TRANSIENTS
500
450
I OUT = 0
MAX1644-07
0.10
0.09
V SHDN
5V/div
0
400
0.08
350
300
250
200
150
100
UNDERVOLTAGE
LOCKOUT
SHDN = V IN = V CC
SHDN = GND
0.07
0.06
0.05
0.04
0.03
0.02
I IN
1A/div
V OUT
2V/div
V SS
0
0
50
0
0.01
0
1V/div
0
V IN = 5.0V, V OUT = 3.3V, I OUT = 2A
0
1
2
3
4
5
6
2ms/div
SUPPLY VOLTAGE
4
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