2

UCC2305

UCC3305

ABSOLUTE MAXIMUM RATINGS

VCC Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V

BOOST Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 12.0V

PWMOUT Current, Peak

............................±1.0A

PWMOUT Energy, Capacitive Load . . . . . . . . . . . . . . . . . 5.0

µJ

Input Voltage, Any Input. . . . . . . . . . . . . . . . . . –0.3V to +10.0V

Output Current, QOUT, QOUT, FLT . . . . . . . . . . . . . .

±10.0mA

Output Current, 5VREF, LPOWER, COMP . . . . . . . . .

±10.0mA

ISET Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0mA

Storage Temperature . . . . . . . . . . . . . . . . . . .

−65°C to +150°C

Junction Temperature . . . . . . . . . . . . . . . . . . .

−55°C to +150°C

Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300

°C

CONNECTION DIAGRAM

Ω to GND, ADJ = 100kΩ to GND,

OSC = 200pF to GND, BAT = 4V, LOADISENSE connected to LPOWER, VOUTSENSE = 0.666V, BOOST = 10.5V, COMP

connected to FB through a 100k

PARAMETER

TEST CONDITIONS

MIN.

TYP.

MAX. UNITS

Overall Section

VCC Supply Current

0.1

1.0

mA

BOOST Supply Current

3.0

5.0

mA

BOOST Threshold to PUMP Stop

9.1

9.6

10.2

V

BOOST Threshold to PUMP Start

9.2

9.7

10.3

V

BOOST Threshold to PWMOUT

4.7

5.4

6.1

V

Battery Section

BAT Threshold to PWMOUT Stop

4.7

5.0

5.3

V

BAT Threshold to PWMOUT Start

4.15

4.8

5.0

V

BAT Input Current

BAT = 4V

–1

1

µA

Oscillator & Divider Section

OSC Frequency

80

100

120

kHz

OSC Pull-Up Current

OSC = 1.5V

−70

−50

−40

µA

DIVPAUSE Threshold to Pause

1.1

1.5

1.9

V

DIVPAUSE Threshold to Divide

0.8

1.2

1.6

V

DIVPAUSE Input Current

0V < DIVPAUSE < 6V

–8

–5

–1

µA

Reference Section

5VREF Voltage

4.85

5.0

5.1

V

ISET Voltage

4.8

4.8

5.2

V

Error Amplifier Section

FB Voltage

2.4

2.5

2.6

V

FB Input Current

–1

0

1

µA

FB Sink Current

VOUTSENSE = 4V, FB = 4V

0.3

1.5

mA

FB Release Delay

VOUTSENSE Step from 4V to 1V

15

30

43

ms

COMP Source Current

FB = 2V, COMP = 4V

–3.0

–0.2

mA

COMP Sink Current

FB = 3V, COMP = 1V

0.2

1.0

mA

PDIP-28 or SOIC-28 (Top View)

N or DW Package