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| 型号： | MAX1951ESA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 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： | 0.8 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： | 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： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOIC |
1MHz, All-Ceramic, 2.6V to 5.5V Input,
2A PWM Step-Down DC-to-DC Regulators
ELECTRICAL CHARACTERISTICS (continued)
(V IN = V CC = 3.3V, PGND = GND, FB in regulation, C REF = 0.1μF, T A = 0°C to +85°C , unless otherwise noted. Typical values are at
T A = +25°C.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
LX
V IN = 5V
116
LX On-Resistance, PMOS
V IN = 3.3V
140
266
m Ω
V IN = 2.6V
V IN = 5V
163
93
LX On-Resistance, NMOS
V IN = 3.3V
106
206
m Ω
V IN = 2.6V
116
LX Current-Sense
Transimpedance
From LX to COMP, V IN = 2.6V to 5.5V
0.16
0.24
0.35
Ω
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
Duty cycle = 100%, V IN = 2.6V to 5.5V
V IN = 5.5V
V IN = 2.6V to 5.5V
High side
Low side
V LX = 5.5V
LX = GND
2.4
-10
0.85
3.1
-0.6
1
4.5
10
1.1
A
μA
MHz
LX Maximum Duty Cycle
LX Minimum Duty Cycle
V COMP = 1.5V, LX = Hi-Z, V IN = 2.6V to 5.5V
V COMP = 1V, V IN = 2.6V to 5.5V
100
15
%
%
THERMAL CHARACTERISTIC S
Thermal-Shutdown Threshold
When LX starts/stops switching
T J rising
T J falling
160
145
°C
ELECTRICAL CHARACTERISTICS
(V IN = V CC = 3.3V, PGND = GND, FB in regulation, C REF = 0.1μF, T A = -40°C to +85°C , unless otherwise noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IN AND V CC
IN Voltage Range
Supply Current
Shutdown Current
Switching with no load, V IN = 5.5V
COMP = GND
2.6
5.5
10
1
V
mA
mA
V CC Undervoltage Lockout
Threshold
When LX starts/stops switching
V CC rising
V CC falling
1.95
2.5
V
REF
REF Voltage
REF Load Regulation
REF Line Regulation
REF Shutdown Resistance
I REF = 0μA, V IN = 2.6V to 5.5V
I REF = 0 to 40μA, V IN = 2.6V to 5.5V
I REF = 20μA, V IN = 2.6V to 5.5V
From REF to GND, COMP = GND
1.95
2.03
0.2
0.4
22
V
%
%
Ω
_______________________________________________________________________________________
3
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