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| 型号： | MAX887HESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/12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
ABSOLUTE MAXIMUM RATINGS
REF, FB, SYNC, VL to GND..................................... -0.3V to +6V
V+ to GND ............................................................. -0.3V to +12V
SHDN , LX to GND ....................................... -0.3V to (V+ + 0.3V)
PGND to GND ...................................................... -0.3V to +0.3V
Continuous Power Dissipation (T A = +70°C)
Operating Temperature Ranges
MAX887HC/D.......................................................0°C to +70°C
MAX887HESA ...................................................-40°C to +85°C
Storage Temperature Range ........................... -65°C to +165°C
Lead Temperature (soldering, 10sec) ............................ +300°C
SO (derate 9.09mW/°C above +70°C) .........................471mW
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+ = +7V, PGND = GND = 0V, SHDN = V+, (T A = 0°C to T MAX ) , unless otherwise noted.)
PARAMETER
Supply Range
SYMBOL
V+
CONDITIONS
MIN
3.5
TYP
MAX
11.0
UNITS
V
Quiescent Supply Current
(PWM Mode)
Quiescent Supply Current
(PFM Mode)
Shutdown Supply Current
Output Voltage Range
Load Regulation
Line Regulation
I V+, PWM
I V+, PFM
I V+, SHDN
V OUT, RANGE
I OUT = 0mA, SYNC = 3.0V
I OUT = 0mA, SYNC = GND
SHDN = GND
Circuit of Figure 2
I OUT = 0mA to 500mA
V IN = 4V to 11V, PWM mode
1.25
2.7
0.2
2.5
0.005
0.2
4.0
0.5
5
10.50
mA
mA
μA
V
%/mA
%/V
PWM FB Feedback Threshold
V FB
SYNC = 3.0V, PWM duty cycle = 50%
1.225
1.250
1.275
V
FB Input Current
SYNC Frequency
SYNC Pulse Width High or Low
I FB
f SYNC
SYNC, PW
FB = 1.30V
25
500
±0.10
440
μA
kHz
ns
PWM Maximum Duty Cycle
PWM, DUTY
SYNC = 3.0V, FB = 1.18V
100
%
PWM Switching Frequency
High-Side Current Limit
LX On-Resistance
LX Leakage Current
LX Reverse Leakage Current,
Regulator Off
Undervoltage Lockout
Startup Voltage
f OSC
I LIM+
R ON, LX
I LXLKG
I LXLKGR
V +, UVLO
V +, START
SYNC = 3.0V
I LX = ±100mA
V+ = 12V, LX = GND to 12V
V+ = floating, LX = 5V, SHDN = GND
V+ falling
V+ rising
260
0.75
-10
300
1.0
0.6
1.0
1.0
3.0
3.1
340
1.40
10
20
3.3
3.5
kHz
A
?
μA
μA
V
V
SYNC Input High Voltage
SYNC Input Low Voltage
V IH, SYNC
V IL, SYNC
2.5
0.5
V
V
SYNC Input Current
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Input Current, Sinking
SHDN Input Capacitance
VL Output Voltage
REF Output Voltage
I IN, SYNC
V IH, SHDN
V IL, SHDN
I IN-, SHDN
C IN, SHDN
V L
V REF
SYNC = GND or 3V
SHDN = GND or V+
(Note 1)
I VL = 0mA to 1mA
0μA to 30μA
2.4
3.3
1.25
±1
0.8
±1
10
μA
V
V
μA
pF
V
V
Note 1: Guaranteed by design and not production tested.
2
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