Datasheet

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ELECTRICAL CHARACTERISTICS
TPS51120
SLUS670B – JULY 2005 – REVISED FEBRUARY 2007
over operating free-air temperature range, V
VIN
= 12 V, V
VREG5
= V
V5FILT
= 5 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
VIN current, VREG5=VREG3=No
Load, EN3=EN5=FLOAT,
I
INCCAP
Supply current Current mode 750 1500
EN1=EN2=5V, CS=5V, COMP
connected to Cap
VIN current, VREG5=VREG3=No
Load, EN3=EN5=FLOAT;
I
INNOCAP
Supply current D-CAP mode 700 1400
EN1=EN2=5V, CS=5V,
COMP=5V
VIN current, VREG5=No Load
µ A
I
IN5(STBY)
Stand-by current EN3=0V, EN5=FLOAT, 5-V only 30 45
EN1=EN2=0
VIN current, VREG3=No Load
I
IN3(STBY)
Stand-by current EN3=FLOAT, EN5=0, 3.3-V only 12 20
EN1=EN2=0
VIN current, VREG5=VREG3=VREF2=No Load
I
IN532(STBY)
Stand-by current 100 160
EN3=EN5=FLOAT, EN1=EN2=0
I
IN(SHDN)
Shut down current VIN current, EN3=EN5=EN1=EN2=0V 10 20
VOUT and VREF2 VOLTAGES
V
FB2
= 3.3 V, T
A
= 25 ° C, No Load 3.241 3.300 3.359
V
FB2
= 3.3 V, T
A
= 0 to 85 ° C, No Load 3.234 3.300 3.366
V
FB2
= 3.3 V, T
A
= -40 to 85 ° C, No Load 3.224 3.300 3.376
V
OUT
Output voltage V
FB1
= 5 V, T
A
= 25 ° C, No Load 4.910 5.000 5.090 V
V
FB1
= 5 V, T
A
= 0 to 85 ° C, No Load 4.900 5.000 5.100
V
FB1
= 5 V, T
A
= -40 to 85 ° C, No Load 4.885 5.000 5.115
Adjustable mode output range 1.0 5.5
V
ADJ
Output regulation voltage Adjustable mode 1.00 V
Adjustable mode, T
A
= 25 ° C -0.9% 0.9%
Output regulation voltage
V
ADJ T
Adjustable mode, T
A
= 0 to 85 ° C -1.3% 1.3%
tolerance
Adjustable mode, T
A
= -40 to 85 ° C -1.6% 1.6%
V
VREF2
2-V output regulation voltage I
VREF2
± 50 µ A, T
A
= 25 ° C 1.97 2.00 2.03
I
VREF2
± 50 µ A, T
A
= 0 to 85 ° C 1.96 2.04 V
2-V output regulation voltage
V
VREF2T
tolerance
I
VREF2
± 50 µ A, T
A
= -40 to 85 ° C 1.95 2.05
VFBx=1.02V, COMPx=open 0.02
I
VFB
VFB input current µ A
VFBx=1.02V, COMPx=5V 0.02
R
DISCHARG
Discharge switch resistance VOx=0.5V, T
A
= 25 ° C 10 20 Ω
4
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