6

FN6389.0

January 17, 2007

Ramp Amplitude

ΔV

OSC

0.470

V

Modulator Gain

By Design

8

-

Maximum Duty Cycle

88

%

Maximum Duty Cycle

76

%

REFERENCE VOLTAGE

Reference Voltage

0.600

V

System Accuracy

-1.0

+1.0

%

FB Pin Bias Current

±80

±200

nA

SOFT-START

Soft-Start Current

20

30

40

μA

Enable Soft-Start Threshold

0.8

1.0

1.2

V

Enable Soft-Start Threshold Hysteresis

12

mV

Enable Soft-Start Voltage High

2.8

3.2

3.8

V

ERROR AMPLIFIER

DC Gain

Note 3

88

dB

Gain-Bandwidth Product

GBWP

Note 3

15

MHz

Maximum Output Voltage

3.9

4.4

V

Slew Rate

SR

5

V/

μs

INTERNAL MOSFETS

VCC = 5V

180

m

Ω

VCC = 5V

90

m

Ω

PGOOD

PGOOD Threshold

Rising Edge Hysteresis 1%

107

111

115

%

Falling Edge Hysteresis 1%

86

90

93

%

PGOOD Rising Delay

250

ms

PGOOD Leakage Current

5

μA

PGOOD Low Voltage

Note 3

0.10

V

PGOOD Sinking Current

Note 3

0.5

mA

PROTECTION

Positive Current Limit

VCC = 5V, IOC from PHASE to PGND.

Notes 3, 6

2.8

3.5

4.0

A

Negative Current Limit

VCC = 5V, IOC from VIN to PHASE.

Notes 3, 6

2.2

3.0

3.5

A

Undervoltage Level

76

80

84

%

Thermal Shutdown Setpoint

Note 3

150

°C

Thermal Recovery Setpoint

Note 3

130

°C

Electrical Specifications

Refer to Block and Simplified Power System Diagrams and Typical Application Schematics. Operating

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ISL8502