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參數(shù)資料
| 型號： | TPS53353DQPT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO22 |
| 封裝： | 5 X 6 MM, ROHS COMPLIANT, PLASTIC, SON-22 |
| 文件頁數(shù)： | 21/25頁 |
| 文件大?。?/td> | 556K |
| 代理商： | TPS53353DQPT |
VFB
EN
PGOOD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GND
PowerPad
TM
18
19
20
21
22
DQP Package
(Top View)
VBST
TRIP
MODE
N/C
LL
RF
VDD
VREG
VIN
SLUSAK2
– AUGUST 2011
DEVICE INFORMATION
(1)
N/C = no connection
PIN FUNCTIONS
PIN
I/O/P(1)
DESCRIPTION
NAME
NO.
EN
2
I
Enable pin.Typical turn-on threshold voltage is 1.2 V. Typical turn-off threshold voltage is 0.95 V.
GND
G
Ground and thermal pad of the device. Use proper number of vias to connect to ground plane.
6
7
8
LL
B
Output of converted power. Connect this pin to the output Inductor.
9
10
11
Soft-start and Skip/CCM selection. Connect a resistor to select soft-start time using Table 1. The soft-start
MODE
20
I
time is detected and stored into internal register during start-up.
N/C
5
No connect.
Open drain power good flag. Provides 1-ms start-up delay after VFB falls in specified limits. When VFB
PGOOD
3
O
goes out of the specified limits PGOOD goes low after a 2-
s delay
Switching frequency selection. Connect a resistor to GND or VREG to select switching frequency using
RF
22
I
Table 2. The switching frequency is detected and stored during the startup.
OCL detection threshold setting pin. ITRIP = 10 A at room temperature, 4700 ppm/°C current is sourced
and set the OCL trip voltage as follows.
TRIP
21
I
space VOCL=VTRIP/32
(VTRIP ≤ 1.2 V, VOCL ≤ 37.5 mV)
Supply input for high-side FET gate driver (boost terminal). Connect capacitor from this pin to LL node.
VBST
4
P
Internally connected to VREG via bootstrap MOSFET switch.
VDD
19
P
Controller power supply input. VDD input voltage range is from 4.5 V to 25 V.
VFB
1
I
Output feedback input. Connect this pin to Vout through a resistor divider.
12
13
14
VIN
P
Conversion power input.The conversion input voltage range is from 3 V to 15 V.
15
16
17
VREG
18
P
5-V low drop out (LDO) output. Supplies the internal analog circuitry and driver circuitry.
(1)
I=Input, O=Output, B=Bidirectional, P=Supply, G=Ground
Copyright
2011, Texas Instruments Incorporated
5
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