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參數(shù)資料
| 型號(hào)： | AAT1157IVN-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 1MHz 1.2A Buck DC/DC Converter |
| 中文描述： | 1MHz的1.2A的降壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 394K |
| 代理商： | AAT1157IVN-T1 |
AAT1157
1MHz 1.2A Buck DC/DC Converter
4
1157.2005.11.1.4
Electrical Characteristics
1
V
IN
= V
CC
= V
P
= 5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= 25°C.
Symbol
V
IN
Description
Input Voltage Range
Conditions
Min
2.7
Typ
Max
5.5
Units
V
V
OUT
Output Voltage Tolerance
V
IN
= V
OUT
+ 0.2 to 5.5V,
I
OUT
= 0 to 1.2A
V
IN
= 4.2V, I
LOAD
= 0 to 1.2A
V
IN
=2.7 to 5.5V
No Load
V
EN
= 0V, V
IN
= 5.5V
T
A
= 25°C
V
IN
Rising, V
EN
= V
CC
V
IN
Falling, V
EN
= V
CC
-4
+4
%
V
OUT
/V
OUT
V
OUT
(V
OUT
*
V
IN
)
I
Q
I
SHDN
I
LIM
Load Regulation
Line Regulation
Quiescent Supply Current
Shutdown Current
Current Limit
±2.5
±0.1
160
%
%/V
μA
μA
A
300
1.0
1.7
V
UVLO
Under-Voltage Lockout
2.5
V
1.2
V
UVLO(HYS)
V
IL
V
IH
I
IL
I
IH
R
DS(ON)H
R
DS(ON)L
F
OSC
Under-Voltage Lockout Hysteresis
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
High Side Switch On Resistance
Low Side Switch On Resistance
Oscillator Frequency
Over-Temperature Shutdown
Threshold
Over-Temperature Shutdown
Hysteresis
250
mV
V
V
μA
μA
m
m
kHz
0.6
1.4
V
IN
= V
FB
= 5.5V
V
IN
= V
FB
= 0V
T
A
= 25°C
T
A
= 25°C
T
A
= 25°C
1.0
1.0
150
150
1250
110
100
1000
750
T
SD
140
°C
T
HYS
15
°C
1. The AAT1157 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
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