5

FN6168.0

October 12, 2005

INPUTS AND OUTPUTS

Logic Input Threshold High (SHDNA#, SKIP#,

STBY# )

Rising edge

1.2

1.7

2.20

V

Hysteresis

225

mV

Logic Input Current (SHDNA#, SKIP#,

STBY#)

-1

1

µA

FB Input Logic Levels

Low (2.5V output)

0.1

V

High (1.8V output)

2.1

V

Input Bias Current (FB)

-0.1

0.1

µA

Four-Level Input Logic Levels

High

V

Floating

3.15

3.85

REF

1.65

2.35

Low

0.5

-3

+3

µA

OUT Input Resistance

FB = GND

125

250

500

k

Ω

90

180

270

k

Ω

FB Adjustable Mode

125

250

500

k

Ω

OUT Discharge Mode On-Resistance

15

30

Ω

LINEAR REGULATORS (VTTR AND VTT)

VTTI Input Voltage Range

1.0

2.8

V

VTTI Supply Current

0.1

1

mA

VTTI Shutdown Current

SHDNA# = STBY# = GND

10

µA

REFIN Input Impedance

17

20

27

k

Ω

REFIN range

1.0

2.8

V

VTT, VTTR UVLO Threshold (Measured at

OUT)

0.01

0.1

0.2

V

Soft-Start Charge Current

4

µA

VTT internal MOSFET High-Side On-

Resistance

0.10

0.28

Ω

VTT internal MOSFET Low-Side On-

Resistance

0.18

0.43

Ω

VTT Output Accuracy (Referenced to VTTR)

-1.5

1.5

%

VTT Load Regulation

1

%

1

%

VTT Positive Current Limit

VTT = 0

2.5

3.0

4.0

A

VTT Negative Current Limit

VTT = VTTI

-3.5

-2.5

-2.0

A

VTTS Input Current

0.1

1

µA

-1.25

1.25

%

VTTR Current Limit

VTTR = 0 or VTTI

±20

±40

±60

mA

Electrical Specifications

Note: Following are target specifications. Final limits may change as a result of characterization.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

ISL88550A