UCC3588

5BIT PROGRAMMABLE OUTPUT BiCMOS

POWER SUPPLY CONTROLLER

SLUS311A – JULY 1999 – REVISED AUGUST 2000

4

POST OFFICE BOX 655303

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

DAC / Reference Section

COMMAND voltage accuracy

10.8 V < VCC < 13.2 V,

measured on COMP,

0

°C < TA < 70°C,

See Note 2

–1.0

1.0

%

D0 to D4 voltage high

5.5

6

6.5

V

D0 to D4 voltage threshold

2.5

3.0

3.5

V

D0 to D4 voltage input bias current

V(D4,...,D0) < 0.5 V

–80

–100

mA

Overvoltage Comparator Section

Trip point

% Over VCOMMAND,

See Note 1

8

12

%

Hysteresis

10

20

35

mV

Undervoltage Comparator Section

Trip point

% Under VCOMMAND,

See Note 1

–8.0

–12.0

%

Hysteresis

10

20

35

mV

PWRGOOD Signal Section

Output impedance

VCC = 12 V,

IPWRGOOD = 1 mA

470

W

Overvoltage Protection Section

Trip point

% Over VCOMMAND,

See Note 1

15

17.5

20

%

Hysteresis

20

35

mV

VSENSE input bias current

OV, OVP, UV combined

–8

–12

–16

mA

Gate Drivers (DRVHI, DRVLO) Section

Output high voltage

IGATE = 100 mA,

VCC = 12 V

10.8

11.5

V

Output low voltage

IGATE =–100 mA, VCC = 12 V

0.5

0.8

V

Driver non-overlap time

(DRVHI– to DRVLO+)

See Note 3

90

120

150

ns

Driver non-overlap time

(DRVLO– to DRVHI+)

See Note 3

50

80

120

ns

Driver rise time

3 nF capacitive load

80

100

ns

Driver fall time

3 nF capacitive load

80

100

ns

Current Limit Section

Start of quick charge to shutdown threshold

VISNS = VSENSE + 75 mV, CSS = 10 nF,

See Note 4,

See Note 5

50

ms

Current limit threshold voltage

VTHRESHOLD = VISNS – VVSENSE

40

54

70

mV

ISNS input bias current

–8

–12

–16

mA

NOTES:

6. This percentage is measured with respect to the ideal command voltage programmed by the VID (D0,....,D4) pins and applies to all

DAC codes from 1.3 V to 3.5 V.

7. Reference and error amplifier offset trimmed while the voltage amplifier is set in unity gain mode.

8. Deadtime delay is measured from the 50% point of DRVHI falling to the 50% point of DRVLO rising, and vice-verse.

9. This time is dependent on the value of CSS.

10. Ensured by design. Not 100% production tested.