参数资料
| 型号： | XRP7657EDTR-F |
| 厂商： | Exar Corporation |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 21 V |
| 输入电压： | 4.75 V ~ 25 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 420kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 剪切带 (CT) |
| 供应商设备封装： | 8-SOICN |
| 其它名称： | 1016-1381-1 |
X R P 7 6 5 7
2 A , 2 5 V N o n S y n c h r o n o u s P W M S t e p D o w n R e g u l a t o r
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
OPERATING RATINGS
Input Voltage Range V IN .............................. 4.75V to 25V
Output Voltage Range V OUT ............................ 0.8V to 21V
Junction Temperature T J Range.................-40°C to 125°C
Thermal Resistance θ JA
(junction to ambient, no heat sink, free air) ........100°C/W
V IN ............................................................ -0.3V to 30V
COMP, FB pin voltage .................................... -0.3V to 6V
SW, EN pin voltage ...................................... -0.3V to V IN
Storage Temperature .............................. -65°C to 150°C
Power Dissipation ................................ Internally Limited
Junction Temperature T J ....................................... 150°C
Lead Temperature (Soldering, 10 sec) ................... 260°C
ESD Rating (HBM - Human Body Model) .................... 2kV
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Ambient Temperature of T A = 25°C only; limits applying over the full Operating
Junction Temperature range are denoted by a “?”. Minimum and Maximum limits are guaranteed through test, design, or
statistical correlation. Typical values represent the most likely parametric norm at T A = 25°C, and are provided for reference
purposes only. Unless otherwise indicated, V IN = 12V, V OUT = 5V, T A = 25°C.
Parameter
Min.
Typ.
Max.
Units
Conditions
Input Voltage V IN
4.75
25
Shutdown Quiescent Current
I SHDN
Quiescent Current I Q
44
1.3
60
2.5
μA
mA
V EN =0.4V
V EN =2.0V, V FB =1.3V
Feedback Voltage V FB
Feedback Bias Current I FB
Switch Current Limit I LIM
Oscillator Frequency f OSC
Oscillator Frequency f OSC1
0.784
2.5
336
0.800
-0.1
3.4
420
40
0.816
-0.5
504
V
μA
A
kHz
kHz
V IN =5V to 25V
V FB =1.3V
V FB =0.52V, Current limit activated or
short circuit protection mode
Error Amplifier Voltage Gain G V
Error Amplifier
Transconductance G S
EN Pin Threshold High V H
EN Pin Threshold Low V L
1.5
1000
700
0.7
V/V
μA/V
V
V
EN Pin Input Leakage Current I EN
Internal PMOS ON Resistance
R DS(ON)
Maximum Duty Cycle D MAX
-5
130
-10
150
100
μA
m ?
%
V EN =2.5V
V IN = V EN =12V, V FB =0.65V, I OUT =12A
V FB =0.65V, I SW =0.1A
Thermal Shutdown T OTSD
Thermal Shutdown Hysteresis
T HYS
? 2011 Exar Corporation
155
20
2/11
°C
°C
Rev. 2.0.0
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