Datasheet

2008-2013 Microchip Technology Inc. DS20002090C-page 9
MCP73871
AC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
IN
= 4.6V to 6V.
Typical values are at +25°C, V
DD
= [V
REG
(typical) + 1.0V]
Parameters Sym Min Typ Max Units Conditions
UVLO Start Delay t
START
—— 5 msV
DD
Low-to-High
Current Regulation
Transition Time Out of Precondition t
DELAY
10 ms V
BAT
< V
PTH
to V
BAT
> V
PTH
Current Rise Time Out of Precondition t
RISE
10 ms I
OUT
Rising to 90% of I
REG
Precondition Comparator Filter Time t
PRECON
0.4 1.3 3.2 ms Average V
BAT
Rise/Fall
Termination Comparator Filter Time t
TERM
0.4 1.3 3.2 ms Average I
OUT
Falling
Charge Comparator Filter Time t
CHARGE
0.4 1.3 3.2 ms Average V
BAT
Falling
Thermistor Comparator Filter Time t
THERM
0.4 1.3 3.2 ms Average THERM Rise/Fall
Elapsed Timer
Elapsed Timer Period t
ELAPSED
0 Hours
3.6 4.0 4.4 Hours
5.4 6.0 6.6 Hours
7.2 8.0 8.8 Hours
Status Indicators
Status Output Turn-off t
OFF
500 μsI
SINK
= 1 mA to 0 mA
Status Output Turn-on t
ON
500 μsI
SINK
= 0 mA to 1 mA
Note 1: Internal safety timer is tested based on internal oscillator frequency measurement.
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, all limits apply for V
IN
= 4.6V to 6V.
Typical values are at +25°C, V
DD
= [V
REG
(typical) + 1.0V]
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range T
A
-40 +85 °C
Operating Temperature Range T
J
-40 +125 °C
Storage Temperature Range T
A
-65 +150 °C
Thermal Package Resistances
Thermal Resistance, 20LD-QFN, 4x4
JA
50 °C/W 4-Layer JC51-7 Standard Board,
Natural Convection
JC
—8