參數(shù)資料
型號(hào): TPS65162RGZR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 4.2 A SWITCHING REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC48
封裝: 7 X 7 MM, PLASTIC, VQFN-48
文件頁數(shù): 14/36頁
文件大?。?/td> 1034K
代理商: TPS65162RGZR
POSITIVE CHARGE PUMP
Vref
1.265 V
DRVP
Q5
Current
Control
Softstart
FBP
SUP
GND
500 kHz /
750 KHz
Oscillator
I
D
R
VP
Vout + VREF
1 )
R5
R6 +
1.265 V
1 )
R5
R6
(7)
www.ti.com ............................................................................................................................................................... SLVS771B – MAY 2007 – REVISED JUNE 2008
The positive charge pump provides a regulated output voltage set by the external resistor divider. The TPS65162
positive charge pump block is shown in Figure 22.
Figure 22. Positive Charge Pump Block TPS65162
Since the flying capacitor-voltage sits on top of the drive-pin voltage, the maximum output voltage is VSUP+VS
–Vdrop. Vdrop is the voltage drop across the external diodes and internal charge pump MOSFETs. If higher output
voltages are required, another charge pump stage can be added to the output.
Setting the output voltage:
To minimize noise and leakage current sensitivity, we recommend a value of approximately 20 k
for the lower
feedback divider resistor R6.
Copyright 2007–2008, Texas Instruments Incorporated
21
Product Folder Link(s): TPS65162
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