Datasheet

TPS51220A
SLUS897E –DECEMBER 2008–REVISED JANUARY 2013 www.ti.com
ORDERING INFORMATION
ORDERABLE
T
A
PACKAGE
(1)
PINS DEVICE TRANSPORT MEDIA QUANTITY ECO PLAN
NUMBER
TPS51220ARTVT 250
TPS51220ARTVR 3000
Plastic Quad Green (RoHS
-40°C to 85°C 32 Tape and Reel
Flat Pack (QFN) and no Sb/Br)
TPS51220ARSNT 250
TPS51220ARSNR 3000
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at www.ti.com.
ELECTRICAL CHARACTERISTICS
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
SUPPLY CURRENT
VIN shutdown current, T
A
= 25°C,
I
VINSDN
VIN shutdown current 7 15 μA
No Load, EN = 0V, V5SW = 0 V
VIN standby current, T
A
= 25°C, No Load,
I
VINSTBY
VIN Standby Current 80 120 μA
EN1 = EN2 = V5SW = 0 V
Vbat standby current, T
A
= 25°C, No Load
I
VBATSTBY
VBAT Standby Current 500 μA
SKIPSEL2 = 2V, EN2 = open, EN1 = V5SW = 0V
(1)
TRIP = 5 V 0.8 mA
V5SW current, T
A
= 25°C, No Load,
I
V5SW
V5SW Supply Current
ENx = 5V, VFBx = 1.05 V
TRIP = 0 V 0.9 mA
VREF2 OUTPUT
I
(VREF2)
< ±10 μA, T
A
= 25°C 1.98 2.00 2.02
V
VREF2
VREF2 Output Voltage V
I
(VREF2)
< ±100 μA, 4.5V < VIN < 32 V 1.97 2.00 2.03
VREG3 OUTPUT
V5SW = 0 V, I
(VREG3)
= 0 mA, T
A
= 25°C 3.279 3.313 3.347
V
VREG3
VREG3 Output Voltage V
V5SW = 0 V, 0 mA < I
(VREG3)
< 10 mA,
3.135 3.300 3.400
5.5 V < VIN < 32 V
I
VREG3
VREG3 Output Current VREG3 = 3 V 10 15 20 mA
VREG5 OUTPUT
V5SW = 0 V, I
(VREG5)
= 0 mA, T
A
= 25°C 4.99 5.04 5.09
V
V5SW = 0 V, 0 mA < I
(VREG5)
< 100 mA,
4.90 5.03 5.15
V
VREG5
VREG5 Output Voltage 6 V < VIN < 32 V
V5SW = 0 V, 0 mA < I
(VREG5)
< 100 mA,
4.50 5.03 5.15 V
5.5 V < VIN < 32 V
V5SW = 0 V, VREG5 = 4.5 V 100 150 200
I
VREG5
VREG5 Output Current mA
V5SW = 5 V, VREG5 = 4.5 V 200 300 400
Turning on 4.55 4.7 4.8
V
THV5SW
Switchover Threshold V
Hysteresis 0.15 0.20 0.25
t
dV5SW
Switchover Delay Turning on 7.7 ms
R
V5SW
5V SW On-Ressitance I
(VREG5)
= 100 mA 0.5 Ω
OUTPUT
T
A
= 25°C, No Load 0.9925 1.000 1.0075
V
VFB
VFB Regulation Voltage Tolerance V
T
A
= –40°C to 85°C , No Load 0.990 1.000 1.010
I
VFB
VFB Input Current VFBx = 1.05 V, COMPx = 1.8 V, T
A
= 25°C –50 50 nA
R
DISCHG
CSNx Discharge Resistance ENx = 0 V, CSNx = 0.5 V, T
A
= 25°C 20 40 Ω
(1) Specified by design. Detail external condition follows application circuit of Figure 57.
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