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TPS56302 Datasheet(PDF) 8 Page - Texas Instruments

No. de Pieza. TPS56302
Descripción  DUAL-OUTPUT LOW-INPUT-VOLTAGE DSP POWER SUPPLY CONTROLLER WITH SEQUENCING
Descarga  34 Pages
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Fabricante  TI [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS56302 Datasheet(HTML) 8 Page - Texas Instruments

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TPS56302
DUAL-OUTPUT LOW-INPUT-VOLTAGE
DSP POWER SUPPLY CONTROLLER WITH SEQUENCING
SLVS289 – MARCH 2000
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics TJ = 0° to 125°C, VCC = 2.8 V to 5.5 V (unless otherwise noted) (continued)
slow-start
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Charge current
V(S/S) = 0.5 V,
Resistance from VREFB pin to ANAGND = 20 k
VREFB = 1.3 V,
Ichg = (IVREFB/5)
10.4
13
15.6
µA
Discharge current
V(S/S) = 1.3 V
3
mA
Comparator input offset voltage
10
mV
Comparator input bias current
See Note 2
10
100
nA
Hysteresis accuracy
–7.5
7.5
mV
Comparator propagation delay
Overdrive = 10 mV,
See Note 2
560
1000
ns
NOTE 2. Ensured by design, not production tested.
VCC UVLO
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Start threshold
(see Note 2)
2.72
2.80
V
Start threshold
TJ = –40°C,
See Note 2
2.71
V
Stop threshold
(see Note 2)
2.48
V
NOTE 2. Ensured by design, not production tested.
power good
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Undervoltage trip point ripple regulator
VIN and VDRV above UVLO thresholds
90
93
95
%VREF
gg
(VSENSE–RR)
TJ = –40°C,
See Note 2
93
%VREF
Undervoltage trip point LDO
VIN and VDRV above UVLO thresholds
90
93
95
%VREF
g
(VSENSE–LDO)
TJ = –40°C,
See Note 2
93
%VREF
Output saturation voltage
IO=5 mA
0.5
0.75
V
Leakage current
VPGD = 4.5 V
1
µA
Hysteresis
VREF = 1.3 V, 1.5 V, or 1.8 V
50
75
mV
Hysteresis
VREF = 2.5 V, or 3.3 V
100
125
mV
Comparator high–low transition time
(propagation delay only)
See Note 2
1
µs
Comparator low–high transition time
(propagation delay + deglitch)
See Note 2
0.2
1
2
ms
NOTE 2. Ensured by design, not production tested.
droop compensation
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Initial accuracy
VDROOP = 50 mV
46
54
mV
overcurrent protection (RR)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
OCP trip point
118
130
142
mV
Input bias current
300
nA
Comparator propagation delay time
Voverdrive = 30 mV,
See Note 2
1
µs
Deglitch time (includes comparator
propagation delay time)
Voverdrive = 30 mV,
See Note 2
2.25
11
µs
NOTE 2. Ensured by design, not production tested.


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