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TPS51123ARGER Fiches technique(PDF) 5 Page - Texas Instruments

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No de pièce TPS51123ARGER
Description  Dual-Synchronous, Step-Down Controller with Out-of-Audio??Operation and 100-mA LDOs for Notebook System Power
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

TPS51123ARGER Fiches technique(HTML) 5 Page - Texas Instruments

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TPS51123A
www.ti.com
SLUSAA6B – APRIL 2011 – REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT DRIVERS
Source, VBSTx - DRVHx = 100 mV
4
8
RDRVH
DRVH resistance
Sink, VDRVHx - LLx = 100 mV
1.5
4
Source, VVREG5 - DRVLx = 100 mV
4
8
RDRVL
DRVL resistance
Sink, VDRVLx = 100 mV
1.5
4
DRVHx-off to DRVLx-on
10
tD
Dead time
ns
DRVLx-off to DRVHx-on
30
INTERNAL BST DIODE
VFBST
Forward voltage
VVREG5-VBSTx, IF = 10 mA, TA = 25 °C
0.7
0.8
0.9
V
IVBSTLK
VBST leakage current
VBSTx = 34 V, LLx = 28 V, TA = 25 °C
0.1
1
μA
DUTY AND FREQUENCY CONTROL
tON11
CH1 on time 1
VIN = 12 V, VO1 = 5 V, 200 kHz setting
2080
tON12
CH1 on time 2
VIN = 12 V, VO1 = 5 V, 245 kHz setting
1700
tON13
CH1 on time 3
VIN = 12 V, VO1 = 5 V, 300 kHz setting
1390
tON14
CH1 on time 4
VIN = 12 V, VO1 = 5 V, 365 kHz setting
1140
tON21
CH2 on time 1
VIN = 12 V, VO2 = 3.3 V, 250 kHz setting
1100
ns
tON22
CH2 on time 2
VIN = 12 V, VO2 = 3.3 V, 305 kHz setting
900
tON23
CH2 on time 3
VIN = 12 V, VO2 = 3.3 V, 375 kHz setting
730
tON24
CH2 on time 4
VIN = 12 V, VO2 = 3.3 V, 460 kHz setting
600
tON(min)
Minimum on time
TA = 25 °C
80
tOFF(min)
Minimum off time
TA = 25 °C
300
SOFT-START
tSS
Internal SS time
Internal soft start
1.1
1.6
2.1
ms
POWERGOOD
PG in from lower
92.50%
95%
97.50%
VTHPG
PG threshold
PG in from higher
102.50%
105%
107.50%
PG hysteresis
2.50%
5%
7.50%
IPGMAX
PG sink current
PGOOD = 0.5 V
5
12
mA
tPGDEL
PG delay
Delay for PG in
350
510
670
μs
LOGIC THRESHOLD AND SETTING CONDITIONS
Shutdown
0.4
VEN0
EN0 setting voltage
V
Enable
2.4
IEN0
EN0 current
VEN0 = 0.2 V
2
3.5
5
μA
Shutdown
0.6
VENC
ENC threshold voltage
V
Enable
2
Shutdown
350
400
450
VEN(trip)
TRIP1, TRIP2 threshold
mV
Hysteresis
10
30
60
200 kHz/250 kHz
1.5
245 kHz/305 kHz
1.9
2.1
VTONSEL
TONSEL setting voltage
V
300 kHz/375 kHz
2.7
3.6
365 kHz/460 kHz
4.7
Auto skip
1.5
VSKIPSEL
SKIPSEL setting voltage
PWM only
1.9
2.1
V
OOA auto skip
2.7
Copyright © 2011–2012, Texas Instruments Incorporated
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