Datasheet

TPS51220A
SLUS897E –DECEMBER 2008–REVISED JANUARY 2013 www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
over operating free-air temperature range, V
EN
= 3.3 V, V
VIN
= 12 V, V
V5SW
= 5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
CURRENT SENSE
RTV package,
28 31 35
T
A
= 0 to 85°C
TRIP=0V/ 2V, 2V<CSNx<12.6V RSN package ,
28 31 34
T
A
= 0 to 85°C
Current limit threshold
V
OCL-ULV
mV
(ultra-low voltage)
T
A
= –40 to 85°C 27 31 37
T
A
= 0 to 85°C 27 31 36
TRIP=0V/ 2V, 0.95V<CSNx<12.6V
T
A
= –40 to 85°C 25 31 42
T
A
= 0 to 85°C 56 60 65
TRIP=3.3V/ 5V, 2V<CSNx<12.6V
T
A
= –40 to 85°C 55 60 68
Current limit threshold
V
OCL-LV
mV
(low voltage)
T
A
= 0 to 85°C 55 60 67
TRIP=3.3V/ 5V,
0.95V<CSNx<12.6V
T
A
= –40 to 85°C 54 60 72
Positive 5
V
ZCAJ
Auto-Zero cross adjustable offset range 0.95V < CSNx < 12.6V, Auto-skip mV
Negative –5
V
ZC
Zero cross detection comparator Offset 0.95V < CSNx < 12.6V, OOA –4 0 4 mV
T
A
= 0 to 85°C –23 –31 –40
Negative current limit threshold TRIP = 0V/2V, 0.95V < CSNx <
V
OCLN-ULV
(ultra-low voltage) 12.6V
T
A
= –40 to 85°C –22 –31 –44
mV
T
A
= 0 to 85°C –50 –60 –73
Negative current limit threshold TRIP = 3.3V/5V, 0.95V < CSNx <
V
OCLN-LV
(low voltage) 12.6V
T
A
= –40 to 85°C –49 –60 –77
OUTPUT DRIVERS
Source, V
(VBST-DRVH)
= 0.1 V 1.7 5
R
DRVH
DRVH resistance Ω
Sink, V
(DRVH-SW)
= 0.1 V 1 3
Source, V
(VREG5-DRVL)
= 0.1 V 1.3 4
R
DRVL
DRVL resistance Ω
Sink, V
(DRVL-GND)
= 0.1 V 0.7 2
UVP, OVP AND UVLO
V
OVP
OVP Trip Threshold OVP detect 110% 115% 120%
t
OVPDLY
OVP Prop Delay 1.5 μs
V
UVP
UVP Trip Threshold UVP detect 65% 70% 73%
t
UVPDLY
UVP Delay 0.8 1 1.2 ms
Wake up 1.7 1.8 1.9 V
V
UVREF2
VREF2 UVLO Threshold
Hysteresis 75 100 125 mV
Wake up 3 3.1 3.2
V
UVREG3
VREG3 UVLO Threshold V
Hysteresis 0.10 0.15 0.20
Wake up 4.1 4.2 4.3 V
V
UVREG5
VREG5 UVLO Threshold
Hysteresis 0.35 0.40 0.44 V
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