Datasheet

TPS51116
SLUS609H – MAY 2004 – REVISED JULY 2009 ................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
V5IN
= 5 V , VLDOIN is connected to VDDQ output (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
DUTY CONTROL
T
ON
Operating on-time V
IN
= 12 V, V
VDDQSET
= 0 V 520
T
ON0
Startup on-time V
IN
= 12 V, V
VDDQSNS
= 0 V 125
ns
T
ON(min)
Minimum on-time T
A
= 25 ° C
(3)
100
T
OFF(min)
Minimum off-time T
A
= 25 ° C
(3)
350
ZERO CURRENT COMPARATOR
Zero current comparator
V
ZC
-6 0 6 mV
offset
OUTPUT DRIVERS
Source, I
DRVH
= -100 mA 3 6
R
DRVH
DRVH resistance
Sink, I
DRVH
= 100 mA 0.9 3
Ω
Source, I
DRVL
= -100 mA 3 6
R
DRVL
DRVL resistance
Sink, I
DRVL
= 100 mA 0.9 3
LL-low to DRVL-on
(3)
10
T
D
Dead time ns
DRVL-off to DRVH-on
(3)
20
INTERNAL BST DIODE
V
FBST
Forward voltage V
V5IN-VBST
, I
F
= 10 mA, T
A
= 25 ° C 0.7 0.8 0.9 V
V
VBST
= 34 V, V
LL
= 28 V, V
VDDQ
= 2.6 V,
I
VBSTLK
VBST leakage current 0.1 1.0 µ A
T
A
= 25 ° C
PROTECTIONS
V
PGND-CS
, PGOOD = HI, V
CS
< 0.5 V 50 60 70
V
OCL
Current limit threshold mV
V
PGND-CS
, PGOOD = LO, V
CS
< 0.5 V 20 30 40
T
A
= 25 ° C, V
CS
> 4.5 V, PGOOD = HI 9 10 11
I
TRIP
Current sense sink current µ A
T
A
= 25 ° C, V
CS
> 4.5 V, PGOOD = LO 4 5 6
TRIP current temperature R
DS(on)
sense scheme, On the basis
TC
ITRIP
4500 ppm/ ° C
coefficient of T
A
= 25 ° C
(3)
Overcurrent protection (V
V5IN-CS
- V
PGND-LL
), V
V5IN-CS
= 60 mV,
V
OCL(off)
-5 0 5
COMP offset V
CS
> 4.5 V
(3)
mV
Current limit threshold setting
V
R(trip)
V
V5IN-CS
(3) (4)
30 150
range
POWERGOOD COMPARATOR
PG in from lower 92.5% 95.0% 97.5%
V
TVDDQPG
VDDQ powergood threshold PG in from higher 102.5% 105.0% 107.5%
PG hysteresis 5%
I
PG(max)
PGOOD sink current V
VTT
= 0 V, V
PGOOD
= 0.5 V 2.5 7.5 mA
T
PG(del)
PGOOD delay time Delay for PG in 80 130 200 µ s
(3) Specified by design.
(4) V5IN references to PWP packaged devices should be interpreted as V5FILT references to RGE packaged devices.
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