Datasheet

LDO Voltage Characteristics
(1)
External Temperature-Sensor(s) Typical Characteristics
(1)
SMBus Characteristics
(1)
bq78PL114
SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 ................................................................................................................................................ www.ti.com
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
LDO1
LDO1 operating voltage, referenced to T
A
= – 40C to 85C, load = 200 µ A 2.425 2.5 2.575 V
VSS
V
LDO2
LDO2 operating voltage, referenced to V2 T
A
= – 40C to 85C, load = 2 mA 2.425 2.5 2.575 V
(1) After calibration
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Measurement range
(2)
– 40 90 ° C
Resolution 0.2 ° C
25 ° ± 1
Accuracy
(3)
° C
0 ° to 85 ° ± 2
(1) Typical for dual-diode (MMBD4148 or equivalent) external sensor using recommended circuit
(2) Range of diode sensors may exceed operational limits of IC and battery cells.
(3) Typical behavior after calibration, final result dependent on specific component characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IL
Input low voltage 0 0.8 V
V
IH
Input high voltage 2.1 5.5 V
V
OL
Output low voltage 350- µ A sink current 0 0.4 V
C
I
Capacitance, each I/O pin 10 pF
f
SCL
SCLK nominal clock frequency T
A
= 25 ° C 100 kHz
V
BUS
5 V nominal 13.3 45.3
R
PU
(2)
Pullup resistors for SCLK, SDATA k Ω
V
BUS
3 V nominal 2.4 6.8
(1) SMBus timing and signals meet the SMBus 2.0 specification requirements under normal operating conditions. All signals are measured
with respect to PACK-negative.
(2) Pullups are typically implemented external to the battery pack, and are selected to meet SMBus requirements.
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