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TPS53127 Fiches technique(PDF) 6 Page - Texas Instruments

No de pièce TPS53127
Description  TPS53127 Dual Synchronous Step-Down Controller For Low Voltage Power Rails
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

TPS53127 Fiches technique(HTML) 6 Page - Texas Instruments

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TPS53127
SLVSA93A – MARCH 2010 – REVISED AUGUST 2014
www.ti.com
Electrical Characteristics (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SOFT START
I(SSC)
SS1/SS2 charge current
VSS1/VSS2 = 0 V, TA = 25°C
–2.5
–2
–1.5
μA
TC(ISSC)
ISSC temperature coefficient
On the basis of 25°C(2)
–4
3
nA/°C
ISSD
SS1/SS2 discharge current
VSS1/VSS2 = 0.5 V
100
150
μA
UVLO
Wake up
3.7
4.0
4.3
V(UV5VFILT) V5FILT UVLO threshold
V
Hysteresis
0.2
0.3
0.4
LOGIC THRESHOLD
V(ENH)
ENx high-level input voltage
EN 1/2
2.0
V
V(ENL)
ENx low-level input voltage
EN 1/2
0.3
V
CURRENT SENSE
I(TRIP)
TRIP source current
V(TRIPx) = 0.1 V, TA = 25°C
8.5
10
11.5
μA
TC(ITRIP)
ITRIP temperature coefficient
On the basis of 25°C
4000
ppm/°C
(V(TRIPx-GND) - V(PGNDx-SWx)) voltage,
–15
0
15
V(TRIPx-GND) = 60 mV, TA = 25°C
VOC(Loff)
OCP compensation offset
mV
(V(TRIPx-GND) - V(PGNDx-SWx)) voltage,
–20
20
V(TRIPx-GND) = 60 mV
VR(trip)
Current limit threshold setting range
V(TRIPx-GND) voltage
30
300
mV
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VOVP
Output OVP trip threshold
OVP detect
110
115
120
%
UVP detect
65
70
75
VUVP
Output UVP trip threshold
%
Hysteresis (recover < 20
μs)
10
THERMAL SHUTDOWN
Shutdown temperature (2)
150
TSDN
Thermal shutdown threshold
°C
Hysteresis (2)
20
(2)
Not production tested - specified by design.
7.6 Timing Requirements
MIN
TYP
MAX
UNIT
OUTPUT: N-CHANNEL MOSFET GATE DRIVERS
DRVHx-low to DRVLx-on
20
50
80
ns
tD
Dead time
DRVLx-low to DRVHx-on
20
40
80
ns
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
tOVPDEL
Output OVP prop delay
1.5
µs
tUVPDEL
Output UVP delay
17
30
40
µs
tUVPEN
Output UVP enable delay
UVP enable delay / soft-start time
x1.4
x1.7
x2.0
ms
7.7 Switching Characteristics
over operating free-air temperature range (unless otherwise noted)
MIN
TYP
MAX
UNIT
ON-TIME TIMER CONTROL
tON1L
CH1 on time
SW1 = 12 V, VO1 = 1.8 V
165
ns
tON2L
CH2 on time
SW2 = 12 V, VO2 = 1.8 V
140
ns
SW1 = 0.7 V, TA = 25°C,
tOFF1L
CH1 min off time
216
ns
VFB1 = 0.7 V
SW2 = 0.7 V, TA = 25°C,
tOFF2L
CH2 min off time
216
ns
VFB2 = 0.7 V
6
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