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参数资料
| 型号： | TPS650250RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 31/31页 |
| 文件大小： | 846K |
| 代理商： | TPS650250RHBR |
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DEVICE INFORMATION
PIN ASSIGNMENTS
24
23
22
21
20
19
18
17
910111213141516
3231302928272625
VDCDC3
PGND3
L3
VINDCDC3
VINDCDC1
L1
PGND1
VDCDC1
EN_Vdd_alive
MODE
DEFDCDC2
PWRFAIL
EN_DCDC1
EN_DCDC2
EN_DCDC3
EN_LDO
DEFDCDC3
AGND1
PWRF
AIL_SNS
Vcc
VINDCDC2
L2
PGND2
VDCDC2
DEFDCDC1
FB_LDO2
FB_LDO1
Vdd_alive
AGND2
VLDO2
VINLDO
VLDO1
1
2
3
4
5
6
7
8
TPS650250
www.ti.com ........................................................................................................................................................................................... SLVS843 – DECEMBER 2008
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME
NO.
SWITCHING REGULATOR SECTION
AGND1
31
Analog ground connection. All analog ground pins are connected internally on the chip.
AGND2
13
Analog ground connection. All analog ground pins are connected internally on the chip.
PowerPad
–
Connect the power pad to analog ground.
I
Input voltage for VDCDC1 step-down converter. This must be connected to the same voltage supply as
VINDCDC1
5
VINDCDC2, VINDCDC3 and VCC.
L1
6
Switch pin of VDCDC1 converter. The VDCDC1 inductor is connected here.
VDCDC1
8
I
VDCDC1 feedback voltage sense input, connect directly to VDCDC1
PGND1
7
Power ground for VDCDC1 converter
I
Input voltage for VDCDC2 step-down converter. This must be connected to the same voltage supply as
VINDCDC2
28
VINDCDC1, VINDCDC3 and VCC.
L2
27
Switch pin of VDCDC2 converter. The VDCDC2 inductor is connected here.
VDCDC2
25
I
VDCDC2 feedback voltage sense input, connect directly to VDCDC2
PGND2
26
Power ground for VDCDC2 converter
I
Input voltage for VDCDC3 step-down converter. This must be connected to the same voltage supply as
VINDCDC3
4
VINDCDC1, VINDCDC2 and VCC.
L3
3
Switch pin of VDCDC3 converter. The VDCDC3 inductor is connected here.
VDCDC3
1
I
VDCDC3 feedback voltage sense input, connect directly to VDCDC3
PGND3
2
Power ground for VDCDC3 converter
Power supply for digital and analog circuitry of DCDC1, DCDC2 and DCDC3 DC-DC converters. This must be
Vcc
29
I
connected to the same voltage supply as VINDCDC3, VINDCDC1 and VINDCDC2.
Input signal indicating default VDCDC1 voltage, 0 = 2.8V, 1 = 3.3V
DEFDCDC1
9
I
This pin can also be connected to a resistor divider between VDCDC1 and GND. In this case the output
voltage of the DCDC1 converter can be set in a range from 0.6V to VINDCDC1
Input signal indicating default VDCDC2 voltage, 0 = 1.8V, 1 = 2.5V
DEFDCDC2
22
I
This pin can also be connected to a resistor divider between VDCDC2 and GND. In this case the output
voltage of the DCDC2 converter can be set in a range from 0.6V to VINDCDC2.
Copyright 2008, Texas Instruments Incorporated
9
Product Folder Link(s): TPS650250
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