Datasheet

POWERPAD
SW1
VBST
SS
VO
VFB
GND
PGND1
14
7
5
6
2
3
4
1
VCC
EN
PG
VREG5
13
12
11
9
8
PGND2
10
SW2
VIN
TPS54225
SLVSA15C –OCTOBER 2009– REVISED FEBRUARY 2011 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
CC
, V
IN
= 12V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
ON
On time V
IN
= 12 V, V
O
= 1.05 V 145 ns
t
OFF(MIN)
Minimum off time T
A
= 25°C, V
FB
= 0.7 V 260 310 ns
SOFT START
I
SSC
Charge current V
SS
= 0 V 1.4 2 2.6 μA
I
SSD
Discharge current V
SS
= 0.5 V 0.1 0.2 mA
POWER GOOD
V
FB
rising (good) 85 90 95
V
THPG
Threshold %
V
FB
falling (fault) 85
I
PG
Sink current PG = 0.5 V 2.5 5 mA
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V
OVP
Output OVP trip threshold OVP detect 115 120 125 %
t
OVPDEL
Output OVP prop delay 5 μs
UVP detect 65 70 75
V
UVP
Output UVP trip threshold %
Hysteresis 10
t
UVPDEL
Output UVP delay 0.25 ms
t
UVPEN
Output UVP enable delay Relative to soft-start time x 1.7
UVLO
Wake up V
REG5
voltage 3.55 3.8 4.05
UVLO UVLO threshold V
Hysteresis V
REG5
voltage 0.23 0.35 0.47
DEVICE INFORMATION
PWP PACKAGE
(TOP VIEW)
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Product Folder Link(s): TPS54225