Datasheet

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 . . . . . . . . . . . . . . . . . 5.0µJ
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
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, VCC = 6.6V, ISET = 100k
Ω
to GND, ADJ = 100k
Ω
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
Ω
resistor, –40°C<T
A<+105°C for the UCC2305, 0°C<TA<+70°C for the UCC3305, and TA=TJ.
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