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TPS51116 Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce TPS51116
Description  COMPLETE DDR, DDR2 AND DDR3 MEMORY POWER SOLUTION SYNCHRONOUS BUCK CONTROLLER, 3-A LDO, BUFFERED REFERENCE
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS51116 Fiches technique(HTML) 6 Page - Texas Instruments

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TPS51116
SLUS609H – MAY 2004 – REVISED JULY 2009................................................................................................................................................................ www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VV5IN = 5 V, VLDOIN is connected to VDDQ output (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DUTY CONTROL
TON
Operating on-time
VIN = 12 V, VVDDQSET = 0 V
520
TON0
Startup on-time
VIN = 12 V, VVDDQSNS = 0 V
125
ns
TON(min)
Minimum on-time
TA = 25°C
(3)
100
TOFF(min)
Minimum off-time
TA = 25°C
(3)
350
ZERO CURRENT COMPARATOR
Zero current comparator
VZC
-6
0
6
mV
offset
OUTPUT DRIVERS
Source, IDRVH = -100 mA
3
6
RDRVH
DRVH resistance
Sink, IDRVH = 100 mA
0.9
3
Source, IDRVL = -100 mA
3
6
RDRVL
DRVL resistance
Sink, IDRVL = 100 mA
0.9
3
LL-low to DRVL-on(3)
10
TD
Dead time
ns
DRVL-off to DRVH-on(3)
20
INTERNAL BST DIODE
VFBST
Forward voltage
VV5IN-VBST , IF = 10 mA, TA = 25°C
0.7
0.8
0.9
V
VVBST = 34 V, VLL = 28 V, VVDDQ = 2.6 V,
IVBSTLK
VBST leakage current
0.1
1.0
µA
TA = 25°C
PROTECTIONS
VPGND-CS , PGOOD = HI, VCS < 0.5 V
50
60
70
VOCL
Current limit threshold
mV
VPGND-CS , PGOOD = LO, VCS < 0.5 V
20
30
40
TA = 25°C, VCS > 4.5 V, PGOOD = HI
9
10
11
ITRIP
Current sense sink current
µA
TA = 25°C, VCS > 4.5 V, PGOOD = LO
4
5
6
TRIP current temperature
RDS(on) sense scheme, On the basis
TCITRIP
4500
ppm/°C
coefficient
of TA = 25°C
(3)
Overcurrent protection
(VV5IN-CS - VPGND-LL), VV5IN-CS = 60 mV,
VOCL(off)
-5
0
5
COMP offset
VCS > 4.5 V
(3)
mV
Current limit threshold setting
VR(trip)
VV5IN-CS
(3) (4)
30
150
range
POWERGOOD COMPARATOR
PG in from lower
92.5%
95.0%
97.5%
VTVDDQPG
VDDQ powergood threshold
PG in from higher
102.5%
105.0%
107.5%
PG hysteresis
5%
IPG(max)
PGOOD sink current
VVTT = 0 V, VPGOOD = 0.5 V
2.5
7.5
mA
TPG(del)
PGOOD delay time
Delay for PG in
80
130
200
µs
(3)
Specified by design.
(4)
V5IN references to PWP packaged devices should be interpreted as V5FILT references to RGE packaged devices.
6
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