Datasheet

TPS54527
(HSOP8)
Power PAD
1
2
3
4
8
7
6
5
SW
GND
VBST
VIN
EN
VFB
VREG5
SS
TPS54527
www.ti.com SLVSAY5C –JULY 2011–REVISED MAY 2012
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 µF) 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 0.1µF 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 © 2011–2012, Texas Instruments Incorporated 5
Product Folder Link(s): TPS54527