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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)： | 2/14頁 |
| 文件大?。?/td> | 394K |
| 代理商： | AAT1157IVN-T1 |
AAT1157
1MHz 1.2A Buck DC/DC Converter
2
1157.2005.11.1.4
Pin Descriptions
Pin Configuration
QFN33-16
(Top View)
VP
VP
VP
VCC
N
PGND
PGND
PGND
1
2
3
4
N
S
E
1
1
1
1
5
6
7
8
12
11
10
9
N
L
L
L
FB
Pin #
Symbol
Function
1, 2, 3
PGND
Main power ground return pin. Connect to the output and input capacitor
return. (See board layout rules.)
4
FB
Feedback input pin. This pin is connected to the converter output. It is used to
set the output of the converter to regulate to the desired value via an internal
resistive divider. For an adjustable output, an external resistive divider is con-
nected to this pin.
5
SGND
Signal ground. Connect the return of all small signal components to this pin.
(See board layout rules.)
7
EN
Enable input pin. A logic high enables the converter; a logic low forces the
AAT1157 into shutdown mode reducing the supply current to less than 1μA.
The pin should not be left floating.
6, 8, 16
N/C
Not internally connected.
9
VCC
Bias supply. Supplies power for the internal circuitry. Connect to input power
via low pass filter with decoupling to SGND.
10, 11, 12
VP
Input supply voltage for the converter power stage. Must be closely decoupled
to PGND.
13, 14, 15
LX
Connect inductor to these pins. Switching node internally connected to the
drain of both high- and low-side MOSFETs.
EP
Exposed paddle (bottom); connect to PGND directly beneath package.
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