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参数资料
| 型号： | MAX1557ETB+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 10TDFN |
| 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： | 0.75 V ~ 5.5 V |
| 输入电压： | 2.6 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
16μA I Q , 1.2A PWM DC-DC
Step-Down Converters
ABSOLUTE MAXIMUM RATINGS
IN, INP, OUT, D2, SHDN to GND ..........................-0.3V to +6.0V
SS, D1 to GND .............................................-0.3V to (V IN + 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
LX Current (Note 1)...........................................................±2.25A
Output Short-Circuit Duration.....................................Continuous
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Continuous Power Dissipation (T A = +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) .......1951mW
Note 1: LX has internal clamp diodes to GND 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 INP = V SHDN = 3.6V, T A = -40°C to +85°C. Typical values are at T A = +25°C, unless otherwise noted.) (Note 2)
PARAMETER
Input Voltage
Undervoltage-Lockout Threshold
Quiescent Supply Current
CONDITIONS
V IN rising and falling, 35mV hysteresis (typ)
No switching, D1 = D2 = GND
Dropout
MIN
2.6
2.20
TYP
2.35
16
27
MAX
5.5
2.55
25
42
UNITS
V
V
μA
Shutdown Supply Current
Output Voltage Range
Output Accuracy
SHDN = GND
T A = 0°C to +85°C
(Note 3)
T A = +25°C
T A = +85°C
No load
300mA load
600mA load
1200mA load, MAX1556
1200mA load, MAX1556A
0.75
-0.25
-0.75
-1.5
-2.75
0.1
0.1
+0.75
0
-0.75
-2.25
-2.25
1
V IN
+1.75
+0.75
0
-1.25
μA
V
%
No load
-0.75
+2.25
T A = -40°C to +85°C
(Note 3)
300mA load
600mA load
1200mA load, MAX1556
-1.5
-2.25
-4.0
+1.5
+0.50
-1.0
Maximum Output Current
MAX1556/MAX1556A
MAX1557
1200
600
mA
D1 = D2 = GND
T A = +25°C
0.01
0.1
OUT Bias Current
MAX1556/MAX1557
T A = +85°C
0.01
μA
For preset output voltages
3
4.5
D1 = D2 = GND,
V OUT = 0.75V at
300mA (typ),
T A = 0°C to +85°C
No load
300mA load
600mA load
-0.50
-1.2
-1.75
+0.75
0
-0.75
+1.75
+1.2
+0.25
FB Threshold Accuracy
MAX1556/MAX1557
D1 = D2 = GND,
1200mA load, MAX1556 only
No load
-3.25
-1.25
-2.25
-1.25
+2.25
%
V OUT = 0.75V
at 300mA (typ),
T A = -40°C to +85°C
MAX1556/MAX1557
300mA load
600mA load
1200mA load, MAX1556 only
-1.75
-2.75
-4.25
+1.50
+0.25
-1.00
2
_______________________________________________________________________________________
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