X

4

Q

M

P

m

© 2012 Exar Corporation

4/29

Rev. 1.0.1

Parameter

Min.

Typ.

Max.

Units

Conditions

Current Sense Accuracy

-3.75

±1.25

3.75

mV

Low Range (≤120mV) Note 2

-60mV applied

-10

10

mV

•

-5

±2.5

5

mV

High Range (≤280mV)

-150mV

-12.5

+12.5

mV

•

Current Sense ADC INL

+/-0.4

LSB

DNL

0.27

Current Limit Set Point

Resolution and Current

Sense ADC Resolution

1.25

mV

Low Range (≤120mV)

2.5

mV

High Range (≤280mV)

Current Sense ADC Range

-120

20

mV

Low Range (≤120mV)

-280

40

High Range (≤280mV)

VOUT ADC Resolution

15

30

60

mV

Low Range

Mid Range

High Range

VOUT ADC Accuracy

-1

1

LSB

VCC ADC Range

4.6

25

V

Note 3

UVLO WARN SET

4.4

4.72

V

UVLO WARN set point 4.6V, VCC=LDO5

UVLO WARN CLEAR

4.4

4.72

V

UVLO WARN set point 4.6V, VCC=LDO5

UVLO FAULT SET (Note 4)

4.2

4.55

V

UVLO FAULT set point 4.4V, VCC=LDO5

VCC ADC Resolution

200

mV

VCC ADC Accuracy

-1

1

LSB

Vin <= 20V

Die Temp ADC Resolution

5

°C

Die Temp ADC Range

-44

156

°C

Output value is in Kelvin

Note 2: Final test limits are ±2.5mV or ±2 LSB

Note 3: Although Range of VCC ADC is technically 0V to 25V, below 4.55 the LDO5 hardware UVLO may have tripped.

Note 4: This test ensures an UVLO FAULT flag will be given before the LDO5 hardware UVLO trips.

Parameter

Min.

Typ.

Max.

Units

Conditions

LDO5 Output Voltage

4.85

5.0

5.15

V

•

5.5V ≤ VCC ≤ 25V

LDO5 Current Limit

135

155

180

mA

•

LDO5 Fault Set

LDO5 UVLO

4.74

V

•

VCC Rising

LDO5 PGOOD Hysteresis

375

mV

VCC Falling

LDO5 Bypass Switch Resistance

1.1

1.5

Ω

Bypass Switch Activation

Threshold

2.5

2.5

%

•

V5EXT Rising, % of threshold setting

Bypass Switch Activation

Hysteresis

150

mV

V5EXT Falling

LDO3_3 Output Voltage

3.15

3.3

3.45

V

•

4.6V ≤ LDO5 ≤ 5.5V

LDO3_3 Current Limit

53

85

mA

•

LDO3_3 Fault Set

Maximum total LDO loading

during ENABLE start-up

30

mA

ENABLE transition from logic low to

high. Once LDO5 in regulation above

limits apply.