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参数资料
| 型号： | MAX887HESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.6A 8SOIC |
| 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： | 1 |
| 输出电压： | 1.25 V ~ 10 V |
| 输入电压： | 3.5 V ~ 11 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 600mA |
| 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
100% Duty Cycle, Low-Noise,
Step-Down, PWM DC-DC Converter
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 2, T A = +25°C, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
EFFICIENCY vs. OUTPUT CURRENT
EFFICIENCY vs. OUTPUT CURRENT
vs. SUPPLY VOLTAGE
100
90
V IN = 4V
100
90
V IN = 5.5V
1200
3.3V SETTING, V OUT = 3.135V
80
70
V IN = 5V
V IN = 11V
80
70
V IN = 11V
1000
800
5V SETTING, V OUT = 4.75V
60
60
50
50
V IN = 9V
600
40
30
20
10
V IN = 9V
V IN = 7V
IDLE MODE
(SYNC = GND)
V OUT = 3.3V
40
30
20
10
V IN = 7V
IDLE MODE
(SYNC = GND)
V OUT = 5V
400
200
GUARANTEED OUTPUT CURRENT
OF FIGURE 2 IS 600mA
0
0
0
0.0001
0.001
0.01
0.1
0.6
0.0001
0.001
0.01
0.1
0.6
3
5
7
9
11
13
15
17
OUTPUT CURRENT (A)
MAXIMUM OUTPUT CURRENT
vs. SYNC FREQUENCY
OUTPUT CURRENT (A)
QUIESCENT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
QUIESCENT CURRENT
vs.TEMPERATURE
1200
1000
800
3.5
3.0
2.5
A
A
3.0
2.5
2.0
V IN = 5.3V
V OUT = 3.3V
PWM MODE
2.0
600
1.5
A: V OUT = 3.3V, PWM MODE
B: V OUT = 3.3V, PFM MODE
1.5
400
C2, C3 = 47μF
L1 = 33μH
1.0
1.0
200
V IN = 5V
V OUT = 3.3V
V OUT = -5% at I OUT(MAX)
0.5
C
B
0.5
PFM MODE
0
0
0
0
100
200 300 400 500
600
0
2
4
6 8 10 12 14 16 18
-60 -40 -20 0 20 40 60 80 100 120 140
SYNC FREQUENCY (kHz)
SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SWITCHING FREQUENCY
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT RIPPLE AND HARMONICS
350
340
330
V OUT = 3.3V
350
340
330
V OUT = 3.3V
4
3
V IN = 5V
V OUT = 3.3V
I OUT = 500mA
320
310
300
290
280
270
260
250
320
310
300
290
280
270
260
250
2
1
0
-1
PWM MODE
0
2
4
6 8 10 12 14 16
18
-60 -40 -20
0 20 40 60 80 100 120 140
10k
100k
1M
10M
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
FREQUENCY (Hz)
4
_______________________________________________________________________________________
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