ELECTRICAL CHARACTERISTICS

TPS51222

SLUS908 – JANUARY 2009............................................................................................................................................................................................... www.ti.com

over operating free-air temperature range, EN = 3.3V, VIN = 12V, V5SW = 5V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

VIN shutdown current, TA = 25°C,

I(VINSDN)

VIN shutdown current

7

15

µA

No Load, EN = 0V, V5SW = 0 V

VIN standby current, TA = 25°C, No Load,

I(VINSTBY)

VIN Standby Current

80

120

µA

EN1 = EN2 = V5SW = 0 V

Vbat standby current, TA = 25°C, No Load

I(VBATSTBY)

Vbat Standby Current

500

µA

SKIPSEL2 = 2V, EN2 = open, EN1 = V5SW = 0V(1)

V5SW current, TA = 25°C, No Load,

I(V5SW)

V5SW Supply Current

0.8

mA

ENx = 5V, VFBx = 1.05 V

VREF2 OUTPUT

I(VREF2) < ±10 µA, TA = 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, TA = 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, TA = 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

td(V5SW)

Switchover Delay

Turning on

7.7

ms

R(V5SW)

5V SW Ron

I(VREG5) = 100 mA

0.5

Ω

OUTPUT

TA = 25°C, No Load

0.9925

1.000

1.0075

VFB Regulation Voltage

V(VFB)

V

Tolerance

TA = –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, TA = 25°C

–50

50

nA

R(Dischg)

CSNx Discharge Resistance

ENx = 0 V, CSNx = 0.5 V, TA = 25°C

20

40

Ω

VOLTAGE TRANSCONDUCTANCE AMPLIFIER

Gmv

Gain

TA = 25°C

500

µS

Differential Input Voltage

VID

–30

30

mV

Range

TA = 0 to 85°C

27

33

µA

COMP Maximum Sink

I(COMPSINK)

COMPx = 1.8 V

Current

TA = –40 to 85°C

22

33

µA

COMP Maximum Source

I(COMPSRC)

COMPx = 1.8 V

–33

–43

µA

Current

VCOMP

COMP Clamp Voltage

2.18

2.22

2.26

V

COMP Negative Clamp

VCOMPN

1.73

1.77

1.81

V

Voltage

(1)

Specified by design. Detail external condition follows application circuit of Figure 52.

4

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