Datasheet

TPS51125
www.ti.com SLUS786G –OCTOBER 2007–REVISED JUNE 2012
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range, VIN = 12 V (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
VIN current, T
A
= 25°C, no load, VO1 = 0 V, VO2
I
VIN1
VIN supply current1 = 0 V, EN0=open, ENTRIPx = 5 V, 0.55 1 mA
VFB1 = VFB2 = 2.05 V
VIN current, T
A
= 25°C, no load, VO1 = 5 V, VO2 =
I
VIN2
VIN supply current2 3.3 V, EN0=open, ENTRIPx = 5 V, 4 6.5 μA
VFB1 = VFB2 = 2.05 V
VO1 current, T
A
= 25°C, no load, VO1 = 5 V, VO2
I
VO1
VO1 current = 3.3 V, EN0=open, ENTRIPx = 5 V, 0.8 1.5 mA
VFB1 = VFB2 = 2.05 V
VO2 current, T
A
= 25°C, no load, VO1 = 5 V, VO2
I
VO2
VO2 current = 3.3 V, EN0=open, ENTRIPx = 5 V, 12 100
VFB1 = VFB2 = 2.05 V
VIN current, T
A
= 25°C, no load, μA
I
VINSTBY
VIN standby current 95 250
EN0 = 1.2 V, ENTRIPx = 0 V
VIN current, T
A
= 25°C, no load,
I
VINSDN
VIN shutdown current 10 25
EN0 = ENTRIPx = 0 V
VREF OUTPUT
I
VREF
= 0 A 1.98 2.00 2.02
V
VREF
VREF output voltage V
-5 μA < I
VREF
< 100 μA 1.97 2.00 2.03
VREG5 OUTPUT
VO1 = 0 V, I
VREG5
< 100 mA, T
A
= 25°C 4.8 5 5.2
V
VREG5
VREG5 output voltage VO1 = 0 V, I
VREG5
< 100 mA, 6.5 V < VIN < 28 V 4.75 5 5.25 V
VO1 = 0 V, I
VREG5
< 50 mA, 5.5 V < VIN < 28 V 4. 75 5 5.25
I
VREG5
VREG5 output current VO1 = 0 V, VREG5 = 4.5 V 100 175 250 mA
Turns on 4.55 4.7 4.85
V
TH5VSW
Switch over threshold V
Hysteresis 0.15 0.25 0.3
R
5VSW
5 V SW R
ON
VO1 = 5 V, I
VREG5
= 100 mA 1 3 Ω
VREG3 OUTPUT
VO2 = 0 V, I
VREG3
< 100 mA, T
A
= 25°C 3.2 3.33 3.46
V
VREG3
VREG3 output voltage VO2 = 0 V, I
VREG3
< 100 mA, 6.5 V < VIN < 28 V 3.13 3.33 3.5 V
VO2 = 0 V, I
VREG3
< 50 mA, 5.5 V < VIN < 28 V 3.13 3.33 3.5
I
VREG3
VREG3 output current VO2 = 0 V, VREG3 = 3 V 100 175 250 mA
Turns on 3.05 3.15 3.25
V
TH3VSW
Switch over threshold V
Hysteresis 0.1 0.2 0.25
R
3VSW
3 V SW R
ON
VO2 = 3.3 V, I
VREG3
= 100 mA 1.5 4 Ω
INTERNAL REFERENCE VOLTAGE
V
IREF
Internal reference voltage I
VREF
= 0 A, beginning of ON state 1.95 1.98 2.01
FB voltage, I
VREF
= 0 A, skip mode 1.98 2.01 2.04
V
V
VFB
VFB regulation voltage FB voltage, I
VREF
= 0 A, OOA mode
(1)
2.00 2.035 2.07
FB voltage, I
VREF
= 0 A, continuous conduction
(1)
2.00
I
VFB
VFB input current VFBx = 2.0 V, T
A
= 25°C -20 20 nA
(1) Ensured by design. Not production tested.
Copyright © 2007–2012, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): TPS51125