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參數資料
| 型號： | TPS54227DDA |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 4.7 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | PLASTIC, MS-012BA, SOP-8 |
| 文件頁數： | 15/19頁 |
| 文件大小： | 323K |
| 代理商： | TPS54227DDA |
TPS54227
(HSOP8)
Power PAD
1
2
3
4
5
6
7
8
SW
GND
VBST
VIN
EN
VFB
VREG5
SS
SLVSAU2
– MAY 2011
DEVICE INFORMATION
DDA PACKAGE
(TOP VIEW)
PIN FUNCTIONS
PIN
DESCRIPTION
NAME
NO.
EN
1
Enable input control. EN is active high and must be pulled up to enable the device.
VFB
2
Converter feedback input. Connect to output voltage with feedback resistor divider.
5.5 V power supply output. A capacitor (typical 1
F) should be connected to GND. VREG5 is not active
VREG5
3
when EN is low.
SS
4
Soft-start control. An external capacitor should be connected to GND.
Ground pin. Power ground return for switching circuit. Connect sensitive SS and VFB returns to GND at
GND
5
a single point.
SW
6
Switch node connection between high-side NFET and low-side NFET.
Supply input for the high-side FET gate drive circuit. Connect 0.1
F capacitor between VBST and SW
VBST
7
pins. An internal diode is connected between VREG5 and VBST.
VIN
8
Input voltage supply pin.
Exposed Thermal
Thermal pad of the package. Must be soldered to achieve appropriate dissipation. Must be connected to
Back side
Pad
GND.
Copyright
2011, Texas Instruments Incorporated
5
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