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參數(shù)資料
| 型號： | TPS51317RGBT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 4 X 3.50 MM, GREEN, PLASTIC, QFN-20 |
| 文件頁數(shù)： | 25/28頁 |
| 文件大小： | 1000K |
| 代理商： | TPS51317RGBT |
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VIN
VIN
PGND
SW
V
5
IN
P
G
O
D
M
O
D
E
N
6
7
8
9
11
12
13
14
15
B
S
T
10
PGND
SW
G
N
D
V
R
E
F
C
O
M
P
R
E
F
IN
20
19
18
17
V
O
U
T
16
2
1
5
4
3
SLUSAH9
– MARCH 2011
TPS51317
RGB PACKAGE
(Top View)
Table 2. PIN FUNCTIONS
PIN
I/O
DESCRIPTION
NO.
NAME
Power supply for internal high-side gate driver. Connect a 0.1-
F bootstrap capacitor between this pin and
16
BST
I
the SW pin.
8
COMP
O
Connect series R-C filter between this pin and VREF for loop compensation.
17
EN
I
Enable of the SMPS (3.3-V logic compatible).
6
GND
–
Signal ground.
18
MODE
I
Allows selection of switching frequencies light-load modes. (See Table 4)
1
2
PGND
I
Power ground. Source terminal of the rectifying low-side power FET. Positive input for current sensing.
3
19
PGOOD
O
Power good output. Connect pull-up resistor.
9
REFIN
Target output voltageinput pin. Apply voltage between 0.6 V to 2.0 V.
11
12
13
SW
I/O
Switching node output. Connect to the external inductor. Also serve as current-sensing negative input.
14
15
20
V5IN
I
5-V power supply for analog circuits and gate drive.
4
VIN
I
Power supply input pin. Drain terminal of the switching high-side power FET.
5
10
VOUT
I
Output voltage monitor input pin.
7
VREF
O
2.0-V reference output. Connect a 0.22-
F ceramic capacitor to GND.
6
Copyright
2011, Texas Instruments Incorporated
Product Folder Link(s): TPS51317
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